Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* (C) Copyright IBM Corp. 2016, 2022
*
* SPDX-License-Identifier: Apache-2.0
*/
package com.ibm.fhir.server.util;
import static com.ibm.fhir.core.FHIRConstants.EXT_BASE;
import static com.ibm.fhir.model.type.String.string;
import static com.ibm.fhir.model.util.ModelSupport.getResourceType;
import static com.ibm.fhir.server.util.FHIRRestSupport.getEtagValue;
import static javax.servlet.http.HttpServletResponse.SC_ACCEPTED;
import static javax.servlet.http.HttpServletResponse.SC_BAD_REQUEST;
import java.security.SecureRandom;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import org.owasp.encoder.Encode;
import com.ibm.fhir.config.FHIRConfigHelper;
import com.ibm.fhir.config.FHIRConfiguration;
import com.ibm.fhir.config.FHIRRequestContext;
import com.ibm.fhir.config.PropertyGroup;
import com.ibm.fhir.config.PropertyGroup.PropertyEntry;
import com.ibm.fhir.config.ResourcesConfigAdapter;
import com.ibm.fhir.core.FHIRConstants;
import com.ibm.fhir.core.HTTPHandlingPreference;
import com.ibm.fhir.core.HTTPReturnPreference;
import com.ibm.fhir.core.context.FHIRPagingContext;
import com.ibm.fhir.database.utils.api.LockException;
import com.ibm.fhir.exception.FHIROperationException;
import com.ibm.fhir.model.patch.FHIRPatch;
import com.ibm.fhir.model.patch.exception.FHIRPatchException;
import com.ibm.fhir.model.resource.Bundle;
import com.ibm.fhir.model.resource.Bundle.Entry;
import com.ibm.fhir.model.resource.Bundle.Entry.Request;
import com.ibm.fhir.model.resource.Bundle.Entry.Search;
import com.ibm.fhir.model.resource.OperationOutcome;
import com.ibm.fhir.model.resource.OperationOutcome.Issue;
import com.ibm.fhir.model.resource.Parameters;
import com.ibm.fhir.model.resource.Resource;
import com.ibm.fhir.model.resource.SearchParameter;
import com.ibm.fhir.model.resource.StructureDefinition;
import com.ibm.fhir.model.type.Canonical;
import com.ibm.fhir.model.type.Code;
import com.ibm.fhir.model.type.CodeableConcept;
import com.ibm.fhir.model.type.DateTime;
import com.ibm.fhir.model.type.Decimal;
import com.ibm.fhir.model.type.Extension;
import com.ibm.fhir.model.type.Meta;
import com.ibm.fhir.model.type.Reference;
import com.ibm.fhir.model.type.UnsignedInt;
import com.ibm.fhir.model.type.Uri;
import com.ibm.fhir.model.type.Url;
import com.ibm.fhir.model.type.code.BundleType;
import com.ibm.fhir.model.type.code.HTTPVerb;
import com.ibm.fhir.model.type.code.IssueSeverity;
import com.ibm.fhir.model.type.code.IssueType;
import com.ibm.fhir.model.type.code.SearchEntryMode;
import com.ibm.fhir.model.util.CollectingVisitor;
import com.ibm.fhir.model.util.FHIRUtil;
import com.ibm.fhir.model.util.ModelSupport;
import com.ibm.fhir.model.util.SaltHash;
import com.ibm.fhir.model.visitor.ResourceFingerprintVisitor;
import com.ibm.fhir.path.FHIRPathNode;
import com.ibm.fhir.path.evaluator.FHIRPathEvaluator;
import com.ibm.fhir.path.evaluator.FHIRPathEvaluator.EvaluationContext;
import com.ibm.fhir.path.exception.FHIRPathException;
import com.ibm.fhir.persistence.FHIRPersistence;
import com.ibm.fhir.persistence.FHIRPersistenceSupport;
import com.ibm.fhir.persistence.FHIRPersistenceTransaction;
import com.ibm.fhir.persistence.HistorySortOrder;
import com.ibm.fhir.persistence.InteractionStatus;
import com.ibm.fhir.persistence.MultiResourceResult;
import com.ibm.fhir.persistence.ResourceChangeLogRecord;
import com.ibm.fhir.persistence.ResourceChangeLogRecord.ChangeType;
import com.ibm.fhir.persistence.ResourceEraseRecord;
import com.ibm.fhir.persistence.ResourceResult;
import com.ibm.fhir.persistence.SingleResourceResult;
import com.ibm.fhir.persistence.context.FHIRHistoryContext;
import com.ibm.fhir.persistence.context.FHIRPersistenceContext;
import com.ibm.fhir.persistence.context.FHIRPersistenceContextFactory;
import com.ibm.fhir.persistence.context.FHIRPersistenceEvent;
import com.ibm.fhir.persistence.context.FHIRSystemHistoryContext;
import com.ibm.fhir.persistence.context.impl.FHIRPersistenceContextImpl;
import com.ibm.fhir.persistence.erase.EraseDTO;
import com.ibm.fhir.persistence.exception.FHIRPersistenceException;
import com.ibm.fhir.persistence.exception.FHIRPersistenceIfNoneMatchException;
import com.ibm.fhir.persistence.exception.FHIRPersistenceResourceNotFoundException;
import com.ibm.fhir.persistence.helper.FHIRTransactionHelper;
import com.ibm.fhir.persistence.jdbc.exception.FHIRPersistenceDataAccessException;
import com.ibm.fhir.persistence.payload.PayloadPersistenceResponse;
import com.ibm.fhir.persistence.util.FHIRPersistenceUtil;
import com.ibm.fhir.profile.ProfileSupport;
import com.ibm.fhir.search.SearchConstants;
import com.ibm.fhir.search.SummaryValueSet;
import com.ibm.fhir.search.context.FHIRSearchContext;
import com.ibm.fhir.search.exception.FHIRSearchException;
import com.ibm.fhir.search.parameters.QueryParameter;
import com.ibm.fhir.search.parameters.QueryParameterValue;
import com.ibm.fhir.search.util.ReferenceUtil;
import com.ibm.fhir.search.util.ReferenceValue;
import com.ibm.fhir.search.util.ReferenceValue.ReferenceType;
import com.ibm.fhir.search.util.SearchHelper;
import com.ibm.fhir.server.interceptor.FHIRPersistenceInterceptorMgr;
import com.ibm.fhir.server.operation.FHIROperationRegistry;
import com.ibm.fhir.server.rest.FHIRRestInteraction;
import com.ibm.fhir.server.rest.FHIRRestInteractionVisitorMeta;
import com.ibm.fhir.server.rest.FHIRRestInteractionVisitorOffload;
import com.ibm.fhir.server.rest.FHIRRestInteractionVisitorPersist;
import com.ibm.fhir.server.rest.FHIRRestInteractionVisitorReferenceMapping;
import com.ibm.fhir.server.spi.operation.FHIROperation;
import com.ibm.fhir.server.spi.operation.FHIROperationContext;
import com.ibm.fhir.server.spi.operation.FHIROperationUtil;
import com.ibm.fhir.server.spi.operation.FHIRResourceHelpers;
import com.ibm.fhir.server.spi.operation.FHIRRestOperationResponse;
import com.ibm.fhir.validation.FHIRValidator;
import com.ibm.fhir.validation.exception.FHIRValidationException;
/**
* Helper methods for performing the "heavy lifting" with respect to implementing
* FHIR interactions.
*/
public class FHIRRestHelper implements FHIRResourceHelpers {
private static final Logger log =
java.util.logging.Logger.getLogger(FHIRRestHelper.class.getName());
private static final SecureRandom RANDOM = new SecureRandom();
private static final String LOCAL_REF_PREFIX = "urn:";
private static final com.ibm.fhir.model.type.String SC_BAD_REQUEST_STRING = string(Integer.toString(SC_BAD_REQUEST));
private static final com.ibm.fhir.model.type.String SC_ACCEPTED_STRING = string(Integer.toString(SC_ACCEPTED));
private static final ZoneId UTC = ZoneId.of("UTC");
// Convenience constants to make call parameters more readable
private static final boolean THROW_EXC_ON_NULL = true;
private static final boolean INCLUDE_DELETED = true;
private static final boolean CHECK_INTERACTION_ALLOWED = true;
// default number of entries in system history if no _count is given
private static final int DEFAULT_HISTORY_ENTRIES = 100;
// clamp the number of entries in system history to 1000
private static final int MAX_HISTORY_ENTRIES = 1000;
public static final DateTimeFormatter PARSER_FORMATTER = new DateTimeFormatterBuilder()
.appendPattern("EEE")
.optionalStart()
// ANSIC date time format for If-Modified-Since
.appendPattern(" MMM dd HH:mm:ss yyyy")
.optionalEnd()
.optionalStart()
// Touchstone date time format for If-Modified-Since
.appendPattern(", dd-MMM-yy HH:mm:ss")
.optionalEnd().toFormatter();
private final FHIRPersistence persistence;
private final SearchHelper searchHelper;
private final ResourcesConfigAdapter resourcesConfig;
// Used for correlating requests within a bundle.
private String bundleRequestCorrelationId = null;
private final FHIRValidator validator = FHIRValidator.validator(FHIRConfigHelper.getBooleanProperty(FHIRConfiguration.PROPERTY_VALIDATION_FAIL_FAST, Boolean.FALSE));
public FHIRRestHelper(FHIRPersistence persistence, SearchHelper searchHelper) {
this.persistence = persistence;
this.searchHelper = searchHelper;
PropertyGroup resourcesPropertyGroup = FHIRConfigHelper.getPropertyGroup(FHIRConfiguration.PROPERTY_RESOURCES);
this.resourcesConfig = new ResourcesConfigAdapter(resourcesPropertyGroup);
}
@Override
public FHIRRestOperationResponse doCreate(String type, Resource resource, String ifNoneExist,
boolean doValidation) throws Exception {
// Validate that interaction is allowed for given resource type
validateInteraction(Interaction.CREATE, type);
// Validate the input and, if valid, start collecting supplemental warnings
List warnings = doValidation ? new ArrayList<>(validateInput(resource)) : new ArrayList<>();
// Manage a transaction, starting a new one if we don't have one already
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
FHIRRestOperationResponse response;
try {
// Prepare the persistence event
FHIRPersistenceEvent event =
new FHIRPersistenceEvent(resource, buildPersistenceEventProperties(type, null, null, null, null));
// Run the meta phase to handle ifNoneExist and update the resource meta-data
response = doCreateMeta(event, warnings, type, resource, ifNoneExist);
// If we get a response back from doCreateMeta it means conditional create found
// a match so we can skip further processing
if (response == null) {
// Persistence event processing may modify the resource, so make sure we have the latest value
resource = event.getFhirResource();
final String resourcePayloadKey = UUID.randomUUID().toString();
int newVersionNumber = FHIRPersistenceSupport.getMetaVersionId(resource);
PayloadPersistenceResponse offloadResponse = storePayload(resource, resource.getId(), newVersionNumber, resourcePayloadKey);
response = doCreatePersist(event, warnings, resource, offloadResponse);
}
// At this point, we can be sure the transaction must have been started, so always commit
txn.commit();
txn = null;
} finally {
// If the transaction is still active and we started it, then roll it back because something
// has gone wrong
if (txn != null) {
txn.rollback();
}
}
return response;
}
@Override
public FHIRRestOperationResponse doCreateMeta(FHIRPersistenceEvent event, List warnings, String type, Resource resource,
String ifNoneExist) throws Exception {
log.entering(this.getClass().getName(), "doCreateMeta");
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
try {
// Make sure the expected type (specified in the URL string) is congruent with the actual type
// of the resource.
String resourceType = ModelSupport.getTypeName(resource.getClass());
if (!resourceType.equals(type)) {
String msg = "Resource type '" + resourceType
+ "' does not match type specified in request URI: " + type;
throw buildRestException(msg, IssueType.INVALID);
}
// Check to see if we're supposed to perform a conditional 'create'.
if (ifNoneExist != null && !ifNoneExist.isEmpty()) {
if (log.isLoggable(Level.FINE)) {
log.fine("Performing conditional create with search criteria: " + ifNoneExist);
}
Bundle responseBundle = null;
// Perform the search using the "If-None-Exist" header value.
try {
MultivaluedMap searchParameters = getQueryParameterMap(ifNoneExist);
responseBundle = doSearch(type, null, null, searchParameters, null, resource, false, true);
} catch (FHIROperationException e) {
throw e;
} catch (Throwable t) {
String msg =
"An error occurred while performing the search for a conditional create operation.";
log.log(Level.WARNING, msg, t);
throw new FHIROperationException(msg, t);
}
// Check the search results to determine whether or not to perform the create operation.
int resultCount = responseBundle.getEntry().size();
if (log.isLoggable(Level.FINE)) {
log.fine("Conditional create search yielded " + resultCount + " results.");
}
if (resultCount == 0) {
// Do nothing and fall through to process the 'create' request.
} else if (resultCount == 1) {
// If we found a single match, bypass the 'create' request and return information
// for the matched resource.
final Resource matchedResource = responseBundle.getEntry().get(0).getResource();
final FHIRRestOperationResponse ior = new FHIRRestOperationResponse();
ior.setLocationURI(FHIRUtil.buildLocationURI(type, matchedResource));
ior.setStatus(Response.Status.OK);
ior.setResource(matchedResource);
ior.setCompleted(true);
ior.setOperationOutcome(FHIRUtil.buildOperationOutcome("Found a single match; check the Location header",
IssueType.INFORMATIONAL, IssueSeverity.INFORMATION));
if (log.isLoggable(Level.FINE)) {
log.fine("Returning location URI of matched resource: " + ior.getLocationURI());
}
return ior;
} else {
String msg =
"The search criteria specified for a conditional create operation returned multiple matches.";
throw buildRestException(msg, IssueType.MULTIPLE_MATCHES);
}
}
// For R4, resources may contain an id. For create, this should be ignored and
// we no longer reject the request.
if (resource.getId() != null) {
String msg = "The create request resource included id: '" + resource.getId() + "'; this id has been replaced";
warnings.add(FHIRUtil.buildOperationOutcomeIssue(IssueSeverity.INFORMATION, IssueType.INFORMATIONAL, msg));
if (log.isLoggable(Level.FINE)) {
log.fine(msg);
}
}
// Now we know we are going forward with the create, so fire the 'beforeCreate' event. This may modify the resource
getInterceptorMgr().fireBeforeCreateEvent(event);
// We need to assign the identifier during this first phase so that we have all the ids
// before any of the local reference substitutions are performed in the 'prepare' phase
String logicalId = generateResourceId();
final com.ibm.fhir.model.type.Instant lastUpdated = getCurrentInstant();
final int newVersionNumber = 1;
resource = FHIRPersistenceUtil.copyAndSetResourceMetaFields(event.getFhirResource(), logicalId, newVersionNumber, lastUpdated);
event.setFhirResource(resource);
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
log.exiting(this.getClass().getName(), "doCreateMeta");
}
return null;
}
@Override
public FHIRRestOperationResponse doCreatePersist(FHIRPersistenceEvent event, List warnings, Resource resource, PayloadPersistenceResponse offloadResponse) throws Exception {
log.entering(this.getClass().getName(), "doCreatePersist");
FHIRRestOperationResponse ior = new FHIRRestOperationResponse();
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
// We'll only start a new transaction here if we don't have one. We'll only
// commit at the end if we started one here
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
try {
checkIdAndMeta(resource);
// create the resource and return the location header.
final FHIRPersistenceContext persistenceContext =
FHIRPersistenceContextImpl.builder(event)
.withOffloadResponse(offloadResponse)
.build();
// For 1869 bundle processing, the resource is updated first and is no longer mutated by the
// persistence layer.
SingleResourceResult result = persistence.create(persistenceContext, resource);
if (result.isSuccess() && result.getOutcome() != null) {
warnings.addAll(result.getOutcome().getIssue());
}
ior.setStatus(Response.Status.CREATED);
ior.setResource(resource);
ior.setOperationOutcome(FHIRUtil.buildOperationOutcome(warnings));
// Build our location URI and add it to the interceptor event structure since it is now known.
ior.setLocationURI(FHIRUtil.buildLocationURI(ModelSupport.getTypeName(resource.getClass()), resource));
event.getProperties().put(FHIRPersistenceEvent.PROPNAME_RESOURCE_LOCATION_URI, ior.getLocationURI().toString());
// Invoke the 'afterCreate' interceptor methods.
getInterceptorMgr().fireAfterCreateEvent(event);
// Commit the transaction if we started it (batch bundle)
txn.commit();
txn = null;
return ior;
} finally {
if (txn != null) {
txn.rollback();
}
// Restore the original request context.
FHIRRequestContext.set(requestContext);
log.exiting(this.getClass().getName(), "doCreatePersist");
}
}
@Override
public FHIRRestOperationResponse doPatch(String type, String id, FHIRPatch patch, String ifMatchValue,
String searchQueryString, boolean skippableUpdate) throws Exception {
log.entering(this.getClass().getName(), "doPatch");
// Validate that interaction is allowed for given resource type
validateInteraction(Interaction.PATCH, type);
try {
return doPatchOrUpdate(type, id, patch, null, ifMatchValue, searchQueryString, skippableUpdate, DO_VALIDATION, IF_NOT_MATCH_NULL);
} finally {
log.exiting(this.getClass().getName(), "doPatch");
}
}
@Override
public FHIRRestOperationResponse doUpdate(String type, String id, Resource newResource, String ifMatchValue,
String searchQueryString, boolean skippableUpdate, boolean doValidation, Integer ifNoneMatch) throws Exception {
log.entering(this.getClass().getName(), "doUpdate");
// Validate that interaction is allowed for given resource type
validateInteraction(Interaction.UPDATE, type);
try {
return doPatchOrUpdate(type, id, null, newResource, ifMatchValue, searchQueryString, skippableUpdate, doValidation, ifNoneMatch);
} finally {
log.exiting(this.getClass().getName(), "doUpdate");
}
}
/**
* Common handling of PATCH or UPDATE interactions
* @param type
* @param id
* @param patch
* @param newResource
* @param ifMatchValue
* @param searchQueryString
* @param skippableUpdate
* @param doValidation
* @param ifNoneMatch
* @return
* @throws Exception
*/
private FHIRRestOperationResponse doPatchOrUpdate(String type, String id, FHIRPatch patch, Resource newResource, String ifMatchValue,
String searchQueryString, boolean skippableUpdate, boolean doValidation, Integer ifNoneMatch) throws Exception {
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
try {
// Do the first phase, which includes updating the meta in the resource
FHIRPersistenceEvent event = new FHIRPersistenceEvent(newResource, buildPersistenceEventProperties(type, id, null, null, null));
List warnings = new ArrayList<>();
FHIRRestOperationResponse metaResponse = doUpdateMeta(event, type, id, patch, newResource, ifMatchValue, searchQueryString, skippableUpdate, doValidation, warnings);
if (metaResponse.isCompleted()) {
// skip the update, so we can short-circuit here
txn.commit();
txn = null;
return metaResponse;
}
// Store the payload if we're offloading
final String resourcePayloadKey = UUID.randomUUID().toString();
int newVersionNumber = FHIRPersistenceSupport.getMetaVersionId(metaResponse.getResource());
PayloadPersistenceResponse offloadResponse = storePayload(metaResponse.getResource(), metaResponse.getResource().getId(), newVersionNumber, resourcePayloadKey);
// Persist the resource
FHIRRestOperationResponse ior = doPatchOrUpdatePersist(event, type, id, patch != null,
metaResponse.getResource(), metaResponse.getPrevResource(), warnings, metaResponse.isDeleted(),
ifNoneMatch, offloadResponse);
txn.commit();
txn = null;
return ior;
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
// If we still have a transaction at this point, we need to rollback due to an error.
if (txn != null) {
txn.rollback();
}
log.exiting(this.getClass().getName(), "doUpdate");
}
}
@Override
public FHIRRestOperationResponse doUpdateMeta(FHIRPersistenceEvent event, String type, String id, FHIRPatch patch, Resource newResource,
String ifMatchValue, String searchQueryString, boolean skippableUpdate, boolean doValidation,
List warnings) throws Exception {
log.entering(this.getClass().getName(), "doUpdateMeta");
// Do everything we need to get the resource ready for storage. This includes handling
// update-or-create, conditionals, and the update to the resource meta fields. This
// is all part of the first phase - for bundle-processing, the second phase will handle
// any local reference mapping. Note that we don't do any transaction processing inside
// this method - there's only need for one transaction when processing all the doUpdateMeta
// calls during a batch bundle because all the operations are reads. We only need individual
// transactions later on when we're actually persisting stuff. These saves us a lot of
// transaction overhead, which could be significant when dealing with large bundles.
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
boolean isDeleted; // stash the deleted status of the resource when we first read it
int currentVersion; // stash the current version of the resource when we first read it
FHIRRestOperationResponse ior = new FHIRRestOperationResponse();
try {
// Make sure the type specified in the URL string matches the resource type obtained from the new resource.
if (patch == null) {
String resourceType = ModelSupport.getTypeName(newResource.getClass());
if (!resourceType.equals(type)) {
String msg = "Resource type '" + resourceType
+ "' does not match type specified in request URI: " + type;
throw buildRestException(msg, IssueType.INVALID);
}
}
// Next, if a conditional update was invoked then use the search criteria to find the
// resource to be updated. Otherwise, we'll use the id value to retrieve the current
// version of the resource.
if (searchQueryString != null) {
if (log.isLoggable(Level.FINE)) {
log.fine("Performing conditional update/patch with search criteria: "
+ Encode.forHtml(searchQueryString));
}
Bundle responseBundle = null;
try {
MultivaluedMap searchParameters = getQueryParameterMap(searchQueryString);
responseBundle = doSearch(type, null, null, searchParameters, null, newResource, false, true);
} catch (FHIROperationException e) {
throw e;
} catch (Throwable t) {
String msg =
"An error occurred while performing the search for a conditional update/patch operation.";
throw new FHIROperationException(msg, t);
}
// Check the search results to determine whether or not to perform the update operation.
int resultCount = responseBundle.getEntry().size();
if (log.isLoggable(Level.FINE)) {
log.fine("Conditional update/patch search yielded " + resultCount + " results.");
}
if (resultCount == 0) {
if (patch != null) {
String msg =
"The search criteria specified for a conditional patch operation did not return any results.";
throw buildRestException(msg, IssueType.NOT_FOUND);
}
// Search yielded no matches, so we'll do an update-as-create operation below.
ior.setPrevResource(null);
// if no id provided, then generate an id for the input resource
if (newResource.getId() == null) {
id = persistence.generateResourceId();
newResource = newResource.toBuilder().id(id).build();
// No match, so deletion/version status doesn't matter
isDeleted = false;
currentVersion = 0; // will be a create
} else {
// An id was provided, so we need to perform a read at this point so we know whether
// this is going to be an update or create. This also now gives us the version id
// needed to correctly update the meta for the new resource
id = newResource.getId();
SingleResourceResult srr = doRead(type, id, false, true, newResource, null, false);
ior.setPrevResource(srr.getResource()); // might be null if resource is deleted
isDeleted = srr.isDeleted();
currentVersion = srr.getVersion();
}
} else if (resultCount == 1) {
// If we found a single match, then we'll perform a normal update on the matched resource.
ior.setPrevResource(responseBundle.getEntry().get(0).getResource());
id = ior.getPrevResource().getId();
if (id == null) {
// This should never happen, but we protect against it to avoid propagating the issue
String msg = "Search result resource 'id' attribute is null.";
throw buildRestException(msg, IssueType.VALUE);
}
if (newResource.getId() != null) {
// If the id of the input resource is provided, it MUST match the id of the previous resource
// found by the search
if (!newResource.getId().equals(id)) {
String msg = "Input resource 'id' attribute must match the id of the search result resource.";
throw buildRestException(msg, IssueType.VALUE);
}
} else {
// The new resource does not contain an id, so we set it using the id of the
// previous resource found by the search
newResource = newResource.toBuilder().id(id).build();
}
// Got a match, so definitely can't be deleted
isDeleted = false;
currentVersion = FHIRPersistenceSupport.getMetaVersionId(responseBundle.getEntry().get(0).getResource());
} else {
String msg =
"The search criteria specified for a conditional update/patch operation returned multiple matches.";
throw buildRestException(msg, IssueType.MULTIPLE_MATCHES);
}
} else {
// searchQueryString is null
// Make sure an id value was passed in.
if (id == null) {
String msg = "The 'id' parameter is required for an update/patch operation.";
throw buildRestException(msg, IssueType.REQUIRED);
}
// If an id value was passed in (i.e. the id specified in the REST API URL string),
// then make sure it's the same as the value in the resource.
if (patch == null) {
// Make sure the resource has an 'id' attribute.
if (newResource.getId() == null) {
String msg = "Input resource must contain an 'id' attribute.";
throw buildRestException(msg, IssueType.INVALID);
}
if (!newResource.getId().equals(id)) {
String msg = "Input resource 'id' attribute must match 'id' parameter.";
throw buildRestException(msg, IssueType.VALUE);
}
}
// Retrieve the resource to be updated using the type and id values. Include
// the resource even if it has been deleted
SingleResourceResult srr = doRead(type, id, (patch != null), INCLUDE_DELETED, newResource, null, false);
ior.setPrevResource(srr.getResource());
isDeleted = srr.isDeleted();
currentVersion = srr.getVersion();
// Since 1869, this check is performed before entering the persistence layer
// Check that the resource exists, unless the updateCreate feature is enabled and this is not a patch
if (srr.getResource() == null && (!persistence.isUpdateCreateEnabled() || (patch != null))) {
String msg = "Resource '" + type + "/" + id + "' not found.";
log.log(Level.SEVERE, msg);
throw new FHIRPersistenceResourceNotFoundException(msg);
}
}
if (patch != null) {
try {
newResource = patch.apply(ior.getPrevResource());
} catch (FHIRPatchException e) {
String msg = "Invalid patch: " + e.getMessage();
String path = e.getPath() != null ? e.getPath() : "";
throw new FHIROperationException(msg, e).withIssue(Issue.builder()
.severity(IssueSeverity.ERROR)
.code(IssueType.INVALID)
.details(CodeableConcept.builder()
.text(string(msg))
.build())
.expression(string(path))
.build());
}
}
// Validate the input and, if valid, start collecting supplemental warnings
if (doValidation) {
warnings.addAll(validateInput(newResource));
}
// Perform the "version-aware" update check
if (ior.getPrevResource() != null) {
performVersionAwareUpdateCheck(ior.getPrevResource(), ifMatchValue);
// In the case of a patch, we should not be updating meaninglessly.
if ((skippableUpdate || patch != null) && !isDeleted) {
ResourceFingerprintVisitor fingerprinter = new ResourceFingerprintVisitor();
ior.getPrevResource().accept(fingerprinter);
SaltHash baseline = fingerprinter.getSaltAndHash();
fingerprinter = new ResourceFingerprintVisitor(baseline);
newResource.accept(fingerprinter);
if (fingerprinter.getSaltAndHash().equals(baseline)) {
ior.setResource(ior.getPrevResource());
ior.setStatus(Status.OK);
ior.setLocationURI(FHIRUtil.buildLocationURI(type, ior.getPrevResource()));
ior.setOperationOutcome(OperationOutcome.builder()
.issue(Issue.builder()
.severity(IssueSeverity.INFORMATION)
.code(IssueType.INFORMATIONAL)
.details(CodeableConcept.builder()
.text(string("Update resource matches the existing resource; skipping the update"))
.build())
.build())
.build());
ior.setCompleted(true);
return ior; // early exit, before firing any events
}
}
}
// Configure the persistence event ready to fire the "before create|update|patch" events.
event.setFhirResource(newResource);
event.setPrevFhirResource(ior.getPrevResource());
// Next, invoke the 'beforeCreate', 'beforePatch', or 'beforeUpdate' interceptor methods as appropriate.
boolean updateCreate = (ior.getPrevResource() == null);
if (updateCreate) {
getInterceptorMgr().fireBeforeCreateEvent(event);
} else {
if (patch != null) {
event.getProperties().put(FHIRPersistenceEvent.PROPNAME_PATCH, patch);
getInterceptorMgr().fireBeforePatchEvent(event);
} else {
getInterceptorMgr().fireBeforeUpdateEvent(event);
}
}
// capture the resource in case the interceptors modified it in some way
newResource = event.getFhirResource();
// update the meta in the new resource. Use the version from the previous resource - this gets checked
// again under a database lock during the persistence phase and the request will be rejected if there's
// a mismatch (can happen when there are concurrent updates).
final com.ibm.fhir.model.type.Instant lastUpdated = com.ibm.fhir.model.type.Instant.now(ZoneOffset.UTC);
final int newVersionNumber = currentVersion + 1; // currentVersion will be 0 if this is a create
newResource = FHIRPersistenceUtil.copyAndSetResourceMetaFields(newResource, newResource.getId(), newVersionNumber, lastUpdated);
ior.setResource(newResource);
ior.setDeleted(isDeleted);
// That's it for now - persistence is done later
return ior;
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
log.exiting(this.getClass().getName(), "doUpdateMeta");
}
}
@Override
public FHIRRestOperationResponse doPatchOrUpdatePersist(FHIRPersistenceEvent event, String type, String id,
boolean isPatch, Resource newResource, Resource prevResource,
List warnings, boolean isDeleted, Integer ifNoneMatch, PayloadPersistenceResponse offloadResponse) throws Exception {
log.entering(this.getClass().getName(), "doPatchOrUpdatePersist");
// We'll only start a new transaction here if we don't have one. We'll only
// commit at the end if we started one here
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
FHIRRestOperationResponse ior = new FHIRRestOperationResponse();
try {
// Ensure the persistence event references both original and new resources
event.setFhirResource(newResource);
event.setPrevFhirResource(prevResource);
// Remember, update now doesn't mutate the resource in any way, and nor should the event
checkIdAndMeta(newResource);
FHIRPersistenceContext persistenceContext =
FHIRPersistenceContextImpl.builder(event)
.withIfNoneMatch(ifNoneMatch)
.withOffloadResponse(offloadResponse)
.build();
boolean createOnUpdate = (prevResource == null);
final SingleResourceResult result;
if (createOnUpdate) {
// resource shouldn't exist, so we assume it's a create
result = persistence.create(persistenceContext, newResource);
} else {
// resource already exists, so we know it's an update
result = persistence.update(persistenceContext, newResource);
}
if (result.isSuccess() && result.getOutcome() != null) {
warnings.addAll(result.getOutcome().getIssue());
}
// Since 1869 the persistence layer no longer modifies the resource, so we use the original value here
ior.setResource(newResource);
ior.setOperationOutcome(FHIRUtil.buildOperationOutcome(warnings));
// Invoke the 'afterUpdate' interceptor methods.
if (createOnUpdate) {
// No previous resource found in initial read, so we attempted to
// create a new one
if (result.getStatus() == InteractionStatus.IF_NONE_MATCH_EXISTED) {
// Another thread snuck in and created the resource. Because the client requested
// If-None-Match, we skip any update and return 304 Not Modified.
ior.setResource(null); // null, because we're in createOnUpdate
ior.setLocationURI(FHIRUtil.buildLocationURI(type, id, result.getIfNoneMatchVersion()));
Boolean ifNoneMatchNotModified = FHIRConfigHelper.getBooleanProperty(
FHIRConfiguration.PROPERTY_IF_NONE_MATCH_RETURNS_NOT_MODIFIED, Boolean.FALSE);
if (ifNoneMatchNotModified != null && ifNoneMatchNotModified) {
// Don't treat as an error
ior.setStatus(Response.Status.NOT_MODIFIED);
} else {
throw new FHIRPersistenceIfNoneMatchException("IfNoneMatch precondition failed.");
}
} else {
ior.setStatus(Response.Status.CREATED);
ior.setLocationURI(FHIRUtil.buildLocationURI(type, newResource));
event.getProperties().put(FHIRPersistenceEvent.PROPNAME_RESOURCE_LOCATION_URI, ior.getLocationURI().toString());
getInterceptorMgr().fireAfterCreateEvent(event);
}
} else {
// prevResource exists
if (result.getStatus() == InteractionStatus.IF_NONE_MATCH_EXISTED) {
// Use the location assigned to the previous resource because we're
// not updating anything. Also, we don't fire any 'after' event
// for the same reason.
ior.setResource(prevResource); // 304 Not Modified never needs to return content
ior.setLocationURI(FHIRUtil.buildLocationURI(type, id, result.getIfNoneMatchVersion()));
Boolean ifNoneMatchNotModified = FHIRConfigHelper.getBooleanProperty(
FHIRConfiguration.PROPERTY_IF_NONE_MATCH_RETURNS_NOT_MODIFIED, Boolean.FALSE);
if (ifNoneMatchNotModified != null && ifNoneMatchNotModified) {
// Don't treat as an error
ior.setStatus(Response.Status.NOT_MODIFIED);
} else {
throw new FHIRPersistenceIfNoneMatchException("IfNoneMatch precondition failed.");
}
} else {
// update, so make sure the location is configured correctly for the event
ior.setLocationURI(FHIRUtil.buildLocationURI(type, newResource));
event.getProperties().put(FHIRPersistenceEvent.PROPNAME_RESOURCE_LOCATION_URI, ior.getLocationURI().toString());
ior.setStatus(Response.Status.OK);
if (isPatch) {
getInterceptorMgr().fireAfterPatchEvent(event);
} else {
getInterceptorMgr().fireAfterUpdateEvent(event);
}
}
}
// If the deleted resource is updated, then simply return 201 instead of 200 to pass Touchstone test.
// We don't set the previous resource to null in above codes if the resource was deleted, otherwise
// it will break the code logic of the resource versioning.
if (isDeleted && ior.getStatus() == Response.Status.OK) {
ior.setStatus(Response.Status.CREATED);
}
// Commit our transaction if we started one before.
txn.commit();
txn = null;
return ior;
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
// If we still have a transaction at this point, we need to rollback due to an error.
if (txn != null) {
txn.rollback();
}
log.exiting(this.getClass().getName(), "doPatchOrUpdatePersist");
}
}
/**
* Check that the id and meta fields in the resource have been set up
* @param resource
* @throws FHIRPersistenceException
*/
private void checkIdAndMeta(Resource resource) throws FHIRPersistenceException {
if (resource.getId() == null || resource.getId().isEmpty()) {
throw new FHIRPersistenceException("resource id field not set");
}
if (resource.getMeta() == null) {
throw new FHIRPersistenceException("resource meta is missing");
}
if (resource.getMeta().getVersionId() == null || resource.getMeta().getVersionId().getValue() == null
|| resource.getMeta().getVersionId().getValue().isEmpty()) {
throw new FHIRPersistenceException("resource meta.versionId not set");
}
if (resource.getMeta().getLastUpdated() == null) {
throw new FHIRPersistenceException("resource meta.lastUpdated not set");
}
}
@Override
public FHIRRestOperationResponse doDelete(String type, String id, String searchQueryString) throws Exception {
log.entering(this.getClass().getName(), "doDelete");
// Validate that interaction is allowed for given resource type
validateInteraction(Interaction.DELETE, type);
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
FHIRRestOperationResponse ior = new FHIRRestOperationResponse();
// Make sure we get a transaction started before there's any chance
// it could be marked for rollback
txn.begin();
// A list of supplemental warnings to include in the response
List warnings = new ArrayList<>();
try {
String resourceTypeName = type;
if (!ModelSupport.isResourceType(type)) {
throw buildUnsupportedResourceTypeException(type);
}
Class resourceType =
getResourceType(resourceTypeName);
// Next, if a conditional delete was invoked then use the search criteria to find the
// resource to be deleted. Otherwise, we'll use the id value to identify the resource
// to be deleted.
Bundle responseBundle = null;
if (searchQueryString != null) {
int searchPageSize = FHIRConfigHelper.getIntProperty(FHIRConfiguration.PROPERTY_CONDITIONAL_DELETE_MAX_NUMBER,
FHIRConstants.FHIR_CONDITIONAL_DELETE_MAX_NUMBER_DEFAULT);
if (log.isLoggable(Level.FINE)) {
log.fine("Performing conditional delete with search criteria: "
+ Encode.forHtml(searchQueryString));
}
try {
MultivaluedMap searchParameters = getQueryParameterMap(searchQueryString);
searchParameters.putSingle(SearchConstants.COUNT, Integer.toString(searchPageSize));
responseBundle = doSearch(type, null, null, searchParameters, null, null, false, true);
} catch (FHIROperationException e) {
throw e;
} catch (Throwable t) {
String msg = "An error occurred while performing the search for a conditional delete operation.";
throw new FHIROperationException(msg, t);
}
// Check the search results to determine whether or not to perform the update operation.
int resultCount = responseBundle.getEntry().size();
if (log.isLoggable(Level.FINE)) {
log.fine("Conditional delete search yielded " + resultCount + " results.");
}
if (resultCount == 0) {
// Search yielded no matches
String msg = "Search criteria for a conditional delete operation yielded no matches.";
if (log.isLoggable(Level.FINE)) {
log.fine(msg);
}
ior.setOperationOutcome(FHIRUtil.buildOperationOutcome(msg, IssueType.NOT_FOUND, IssueSeverity.WARNING));
ior.setStatus(Status.OK);
return ior;
} else if (responseBundle.getTotal().getValue() > searchPageSize) {
String msg = "The search criteria specified for a conditional delete operation returned too many matches ( > " + searchPageSize + " ).";
throw buildRestException(msg, IssueType.MULTIPLE_MATCHES);
}
} else {
// Make sure an id value was passed in.
if (id == null) {
String msg = "The 'id' parameter is required for a delete operation.";
throw buildRestException(msg, IssueType.REQUIRED);
}
// Read the resource so it will be available to the beforeDelete interceptor methods.
SingleResourceResult srr = doRead(type, id, !THROW_EXC_ON_NULL, INCLUDE_DELETED, null, null, !CHECK_INTERACTION_ALLOWED);
if (srr.isDeleted()) {
// Because the resource is already deleted, we can't create a
warnings.add(buildOperationOutcomeIssue(IssueSeverity.WARNING, IssueType.DELETED, "Resource of type '"
+ type + "' with id '" + id + "' is already deleted."));
ior.setVersionForETag(srr.getVersion());
} else if (srr.getResource() != null) {
responseBundle = Bundle.builder().type(BundleType.SEARCHSET)
.id(UUID.randomUUID().toString())
.entry(Entry.builder().id(id).resource(srr.getResource()).build())
.total(UnsignedInt.of(1))
.build();
} else {
warnings.add(buildOperationOutcomeIssue(IssueSeverity.WARNING, IssueType.NOT_FOUND, "Cannot find "
+ type + " with id '" + id + "'."));
}
}
if (responseBundle != null) {
for (Entry entry: responseBundle.getEntry()) {
id = entry.getResource().getId();
Resource resourceToDelete = entry.getResource();
// For soft-delete we store a new version of the resource with the deleted
// flag set. Because we've read the resource already, we need to check that
// the version we are deleting matches the version we just read, so the
// persistence layer takes the current version as an argument so that it
// can perform this check after the logical resource is locked for update.
final int currentVersionNumber = FHIRPersistenceSupport.getMetaVersionId(resourceToDelete);
// Because we no longer store a resource payload along with the deletion marker, there's
// no fhirResource value set in the event.
FHIRPersistenceEvent event =
new FHIRPersistenceEvent(null, buildPersistenceEventProperties(type, id, null, null, null));
event.setPrevFhirResource(resourceToDelete);
// First, invoke the 'beforeDelete' interceptor methods.
getInterceptorMgr().fireBeforeDeleteEvent(event);
FHIRPersistenceContext persistenceContext =
FHIRPersistenceContextImpl.builder(event)
.build();
final com.ibm.fhir.model.type.Instant lastUpdated = com.ibm.fhir.model.type.Instant.now(ZoneOffset.UTC);
persistence.delete(persistenceContext, resourceType, resourceToDelete.getId(), currentVersionNumber, lastUpdated);
if (responseBundle.getEntry().size() == 1) {
// The response needs to return the version number of the deletion marker
// as the ETag. This was previously obtained by returning the modified resource,
// which we no longer have.
int newVersionNumber = currentVersionNumber + 1;
ior.setVersionForETag(newVersionNumber);
}
// Invoke the 'afterDelete' interceptor methods. To support the notification service, we
// need to provide a resource with the lastUpdated element set. This is just to simplify
// passing values, even though the resource itself doesn't really exist
final int newVersionNumber = currentVersionNumber + 1;
Resource deletionMarker = FHIRPersistenceUtil.copyAndSetResourceMetaFields(resourceToDelete, resourceToDelete.getId(), newVersionNumber, lastUpdated);
event.setFhirResource(deletionMarker);
getInterceptorMgr().fireAfterDeleteEvent(event);
}
warnings.add(Issue.builder()
.severity(IssueSeverity.INFORMATION)
.code(IssueType.INFORMATIONAL)
.details(CodeableConcept.builder()
.text(string("Deleted " + responseBundle.getEntry().size() + " " + type + " resource(s) " +
"with the following id(s): " +
responseBundle.getEntry().stream().map(e -> e.getResource().getId()).collect(Collectors.joining(","))))
.build())
.build());
// Commit our transaction if we started one before.
txn.commit();
txn = null;
}
// The server should return either a 200 OK if the response contains a payload, or a 204 No Content with no response payload
if (!warnings.isEmpty()) {
ior.setOperationOutcome(FHIRUtil.buildOperationOutcome(warnings));
ior.setStatus(Status.OK);
} else {
ior.setStatus(Status.NO_CONTENT);
}
return ior;
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
// If we previously started a transaction and it's still active, we need to rollback due to an error.
if (txn != null) {
txn.rollback();
}
log.exiting(this.getClass().getName(), "doDelete");
}
}
@Override
public SingleResourceResult doRead(String type, String id, boolean throwExcOnNull, boolean includeDeleted,
Resource contextResource) throws Exception {
return doRead(type, id, throwExcOnNull, includeDeleted, contextResource, null);
}
@Override
public SingleResourceResult doRead(String type, String id, boolean throwExcOnNull, boolean includeDeleted,
Resource contextResource, MultivaluedMap queryParameters) throws Exception {
return doRead(type, id, throwExcOnNull, includeDeleted, contextResource, queryParameters, true);
}
/**
* Performs a 'read' operation to retrieve a Resource.
*
* @param type
* the resource type associated with the Resource to be retrieved
* @param id
* the id of the Resource to be retrieved
* @param throwExcOnNull
* if true, throw an exception if returned resource is null
* @param includeDeleted
* if true, return resource even if deleted
* @param requestProperties
* additional request properties which supplement the HTTP headers associated with this request
* @param contextResource
* a FHIR resource associated with this request
* @param queryParameters
* for supporting _elements and _summary for resource read
* @param checkInteractionAllowed
* if true, check if this interaction is allowed per the tenant configuration; if false, assume interaction is allowed
* @return a {@link SingleResourceResult} containing the Resource
* @throws Exception
*/
private SingleResourceResult doRead(String type, String id, boolean throwExcOnNull, boolean includeDeleted,
Resource contextResource, MultivaluedMap queryParameters, boolean checkInteractionAllowed)
throws Exception {
log.entering(this.getClass().getName(), "doRead");
SingleResourceResult result;
// Validate that interaction is allowed for given resource type
if (checkInteractionAllowed) {
validateInteraction(Interaction.READ, type);
}
// Start a new txn in the persistence layer if one is not already active.
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
try {
String resourceTypeName = type;
if (!ModelSupport.isResourceType(type)) {
throw buildUnsupportedResourceTypeException(type);
}
Class resourceType = getResourceType(resourceTypeName);
FHIRSearchContext searchContext = null;
if (queryParameters != null) {
searchContext = searchHelper.parseReadQueryParameters(resourceType, queryParameters, Interaction.READ.value(),
HTTPHandlingPreference.LENIENT.equals(requestContext.getHandlingPreference()));
}
// First, invoke the 'beforeRead' interceptor methods.
FHIRPersistenceEvent event =
new FHIRPersistenceEvent(contextResource, buildPersistenceEventProperties(type, id, null, searchContext, null));
getInterceptorMgr().fireBeforeReadEvent(event);
FHIRPersistenceContext persistenceContext =
FHIRPersistenceContextFactory.createPersistenceContext(event, includeDeleted, searchContext);
result = persistence.read(persistenceContext, resourceType, id);
if (!result.isSuccess() && throwExcOnNull) {
throw new FHIRPersistenceResourceNotFoundException("Resource '" + type + "/" + id + "' not found.");
}
Resource resource = result.getResource();
event.setFhirResource(resource);
// Invoke the 'afterRead' interceptor methods.
getInterceptorMgr().fireAfterReadEvent(event);
// Commit our transaction if we started one before.
txn.commit();
txn = null;
return result;
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
// If we previously started a transaction and it's still active, we need to rollback due to an error.
if (txn != null) {
txn.rollback();
}
log.exiting(this.getClass().getName(), "doRead");
}
}
@Override
public Resource doVRead(String type, String id, String versionId, MultivaluedMap queryParameters)
throws Exception {
log.entering(this.getClass().getName(), "doVRead");
// Validate that interaction is allowed for given resource type
validateInteraction(Interaction.VREAD, type);
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
// Start a new txn in the persistence layer if one is not already active.
txn.begin();
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
try {
String resourceTypeName = type;
if (!ModelSupport.isResourceType(type)) {
throw buildUnsupportedResourceTypeException(type);
}
Class resourceType = getResourceType(resourceTypeName);
FHIRSearchContext searchContext = null;
if (queryParameters != null) {
searchContext = searchHelper.parseReadQueryParameters(resourceType, queryParameters, Interaction.VREAD.value(),
HTTPHandlingPreference.LENIENT.equals(requestContext.getHandlingPreference()));
}
// First, invoke the 'beforeVread' interceptor methods.
FHIRPersistenceEvent event =
new FHIRPersistenceEvent(null, buildPersistenceEventProperties(type, id, versionId, searchContext, null));
getInterceptorMgr().fireBeforeVreadEvent(event);
FHIRPersistenceContext persistenceContext =
FHIRPersistenceContextFactory.createPersistenceContext(event, searchContext);
SingleResourceResult srr = persistence.vread(persistenceContext, resourceType, id, versionId);
if (!srr.isSuccess() || srr.getResource() == null && !srr.isDeleted()) {
throw new FHIRPersistenceResourceNotFoundException("Resource '"
+ resourceType.getSimpleName() + "/" + id + "' version " + versionId + " not found.");
}
// The resource should exist at this point because if not found, we have already thrown
// FHIRPersistenceResourceNotFoundException or, if deleted, a FHIRPersistenceResourceDeletedException.
event.setFhirResource(srr.getResource());
// Invoke the 'afterVread' interceptor methods.
getInterceptorMgr().fireAfterVreadEvent(event);
// Commit our transaction if we started one before.
txn.commit();
txn = null;
return srr.getResource();
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
// If we previously started a transaction and it's still active, we need to rollback due to an error.
if (txn != null) {
txn.rollback();
}
log.exiting(this.getClass().getName(), "doVRead");
}
}
@Override
public Bundle doHistory(String type, String id, MultivaluedMap queryParameters, String requestUri)
throws Exception {
log.entering(this.getClass().getName(), "doHistory");
// Validate that interaction is allowed for given resource type
validateInteraction(Interaction.HISTORY, type);
// Start a new txn in the persistence layer if one is not already active.
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
Bundle bundle = null;
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
try {
String resourceTypeName = type;
if (!ModelSupport.isResourceType(type)) {
throw buildUnsupportedResourceTypeException(type);
}
Class resourceType = getResourceType(resourceTypeName);
FHIRHistoryContext historyContext = FHIRPersistenceUtil.parseHistoryParameters(queryParameters,
HTTPHandlingPreference.LENIENT.equals(requestContext.getHandlingPreference()));
// First, invoke the 'beforeHistory' interceptor methods.
FHIRPersistenceEvent event =
new FHIRPersistenceEvent(null, buildPersistenceEventProperties(type, id, null, null, null));
getInterceptorMgr().fireBeforeHistoryEvent(event);
FHIRPersistenceContext persistenceContext =
FHIRPersistenceContextFactory.createPersistenceContext(event, historyContext);
MultiResourceResult historyResult =
persistence.history(persistenceContext, resourceType, id);
bundle = createHistoryBundle(historyResult.getResourceResults(), historyContext, type);
bundle = addLinks(historyContext, bundle, requestUri);
event.setFhirResource(bundle);
// Invoke the 'afterHistory' interceptor methods.
getInterceptorMgr().fireAfterHistoryEvent(event);
// Commit our transaction if we started one before.
txn.commit();
txn = null;
return bundle;
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
// If we previously started a transaction and it's still active, we need to rollback due to an error.
if (txn != null) {
txn.rollback();
}
log.exiting(this.getClass().getName(), "doHistory");
}
}
@Override
public Bundle doSearch(String type, String compartment, String compartmentId,
MultivaluedMap queryParameters, String requestUri, Resource contextResource) throws Exception {
return doSearch(type, compartment, compartmentId, queryParameters, requestUri, contextResource, true, false);
}
@Override
public Bundle doSearch(String type, String compartment, String compartmentId,
MultivaluedMap queryParameters, String requestUri,
Resource contextResource, boolean checkInteractionAllowed, boolean alwaysIncludeResources) throws Exception {
log.entering(this.getClass().getName(), "doSearch");
// Validate that interaction is allowed for given resource type
if (checkInteractionAllowed) {
validateInteraction(Interaction.SEARCH, type);
}
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
// Start a new txn in the persistence layer if one is not already active.
txn.begin();
Bundle bundle = null;
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
try {
String resourceTypeName = type;
// Check to see if it's supported, else, throw a bad request.
// If this is removed, it'll result in nullpointer when processing the request
if (!ModelSupport.isResourceType(type)) {
throw buildUnsupportedResourceTypeException(type);
}
Class resourceType = getResourceType(resourceTypeName);
final boolean isLenientHandling = HTTPHandlingPreference.LENIENT == requestContext.getHandlingPreference();
final boolean includeResources = alwaysIncludeResources || HTTPReturnPreference.MINIMAL != requestContext.getReturnPreference() || requestContext.isReturnPreferenceDefault();
if (!includeResources) {
log.info("Not including resources");
}
FHIRSearchContext searchContext = searchHelper.parseCompartmentQueryParameters(compartment, compartmentId, resourceType, queryParameters,
isLenientHandling, includeResources);
// First, invoke the 'beforeSearch' interceptor methods.
FHIRPersistenceEvent event =
new FHIRPersistenceEvent(contextResource, buildPersistenceEventProperties(type, null, null, searchContext, null));
getInterceptorMgr().fireBeforeSearchEvent(event);
FHIRPersistenceContext persistenceContext =
FHIRPersistenceContextFactory.createPersistenceContext(event, searchContext);
MultiResourceResult searchResult =
persistence.search(persistenceContext, resourceType);
bundle = createSearchResponseBundle(searchResult.getResourceResults(), searchContext, type);
if (requestUri != null) {
bundle = addLinks(searchContext, bundle, requestUri);
}
event.setFhirResource(bundle);
// Invoke the 'afterSearch' interceptor methods.
getInterceptorMgr().fireAfterSearchEvent(event);
// Commit our transaction if we started one before.
txn.commit();
txn = null;
return bundle;
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
// If we previously started a transaction and it's still active, we need to rollback due to an error.
if (txn != null) {
txn.rollback();
}
log.exiting(this.getClass().getName(), "doSearch");
}
}
@Override
public Resource doInvoke(FHIROperationContext operationContext, String resourceTypeName, String logicalId,
String versionId, Resource resource, MultivaluedMap queryParameters) throws Exception {
log.entering(this.getClass().getName(), "doInvoke");
// Save the current request context.
FHIRRequestContext requestContext = FHIRRequestContext.get();
String operationName = operationContext.getOperationCode();
try {
Class resourceType = null;
if (resourceTypeName != null) {
resourceType = getResourceType(resourceTypeName);
}
String operationKey = (resourceTypeName == null ? operationName : operationName + ":" + resourceTypeName);
FHIROperation operation = FHIROperationRegistry.getInstance().getOperation(operationKey);
Parameters parameters = null;
if (resource instanceof Parameters) {
parameters = (Parameters) resource;
} else {
if (resource == null) {
// build parameters object from query parameters
parameters =
FHIROperationUtil.getInputParameters(operation.getDefinition(), queryParameters);
} else {
// wrap resource in a parameters object
parameters =
FHIROperationUtil.getInputParameters(operation.getDefinition(), resource);
}
}
// Add properties to the FHIR operation context
setOperationContextProperties(operationContext, resourceTypeName, parameters);
getInterceptorMgr().fireBeforeInvokeEvent(operationContext);
if (log.isLoggable(Level.FINE)) {
log.fine("Invoking operation '" + operationName + "', context=\n"
+ operationContext.toString());
}
Parameters result =
operation.invoke(operationContext, resourceType, logicalId, versionId, parameters, this, searchHelper);
operationContext.setProperty(FHIROperationContext.PROPNAME_RESPONSE_PARAMETERS, result);
if (log.isLoggable(Level.FINE)) {
log.fine("Returned from invocation of operation '" + operationName + "'...");
}
getInterceptorMgr().fireAfterInvokeEvent(operationContext);
// Grab the result from the operationContext in case an interceptor modified it
result = (Parameters) operationContext.getProperty(FHIROperationContext.PROPNAME_RESPONSE_PARAMETERS);
// if single resource output parameter, return the resource
if (FHIROperationUtil.hasSingleResourceOutputParameter(result)) {
return FHIROperationUtil.getSingleResourceOutputParameter(result);
}
return result;
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
log.exiting(this.getClass().getName(), "doInvoke");
}
}
@Override
public Bundle doBundle(Bundle inputBundle, boolean skippableUpdates) throws Exception {
log.entering(this.getClass().getName(), "doBundle");
FHIRRequestContext requestContext = FHIRRequestContext.get();
try {
// First, validate the bundle and save the error / warning responses by index entry.
Map validationResponseEntries = validateBundle(inputBundle);
// Next, process each of the entries in the bundle.
return processBundleEntries(inputBundle, validationResponseEntries, skippableUpdates);
} finally {
// Restore the original request context.
FHIRRequestContext.set(requestContext);
log.exiting(this.getClass().getName(), "doBundle");
}
}
@Override
public FHIRPersistenceTransaction getTransaction() throws Exception {
return persistence.getTransaction();
}
/**
* Validate the input resource and throw if there are validation errors
*
* @param resource
* @throws FHIRValidationException if an error occurs during validation
* @throws FHIROperationException if there are validation errors
* @return A list of validation warnings
*/
private List validateInput(Resource resource)
throws FHIROperationException {
List issues = validateResource(resource);
if (!issues.isEmpty()) {
for (OperationOutcome.Issue issue : issues) {
if (FHIRUtil.isFailure(issue.getSeverity())) {
throw new FHIROperationException("Input resource failed validation.").withIssue(issues);
}
}
if (log.isLoggable(Level.FINE)) {
String info = issues.stream()
.flatMap(issue -> Stream.of(issue.getDetails()))
.flatMap(details -> Stream.of(details.getText()))
.flatMap(text -> Stream.of(text.getValue()))
.collect(Collectors.joining(", "));
log.fine("Validation warnings for input resource: " + info);
}
}
return issues;
}
/**
* Performs validation of a request Bundle and returns a Map of entry indices to error / warning
* response entries that correspond to the entries in the request Bundle.
*
* @param bundle
* the bundle to be validated
* @return a map of entry indices to error responses / warnings; empty if there are no validation warnings or errors
* @throws Exception
*/
private Map validateBundle(Bundle bundle) throws Exception {
log.entering(this.getClass().getName(), "validateBundle");
Map validationResponseEntries = new HashMap<>();
try {
// Make sure the bundle isn't empty
if (bundle == null) {
String msg = "Bundle parameter is missing or empty.";
throw buildRestException(msg, IssueType.REQUIRED);
}
BundleType.Value requestType = bundle.getType().getValueAsEnum();
if (requestType != BundleType.Value.BATCH && requestType != BundleType.Value.TRANSACTION) {
// TODO add support for posting history bundles. Note that when that support
// is added, some of the following bundle constraint checks will need to be updated
// since they are assuming a bundle type of 'batch' or 'transaction'.
String msg = "Bundle.type must be either 'batch' or 'transaction'.";
throw buildRestException(msg, IssueType.VALUE);
}
if (requestType == BundleType.Value.TRANSACTION && !persistence.isTransactional()) {
// For a 'transaction' interaction, if the underlying persistence layer doesn't support
// transactions, then throw an error.
String msg = "Bundled 'transaction' request cannot be processed because "
+ "the configured persistence layer does not support transactions.";
IssueType extendedIssueType = IssueType.NOT_SUPPORTED.toBuilder()
.extension(Extension.builder()
.url(EXT_BASE + "not-supported-detail")
.value(Code.of("interaction"))
.build())
.build();
throw buildRestException(msg, extendedIssueType);
}
if (bundle.getTotal() != null) {
// Verify that the total field is not present for 'batch' or
// 'transaction' type bundles (Bundle constraint bdl-1).
String msg = "Bundle.total must be empty.";
throw buildRestException(msg, IssueType.INVALID);
}
// For 'transaction' bundle requests, keep a list of issues in case of failure
List issueList = new ArrayList();
Set localIdentifiers = new HashSet<>();
Set fullUrls = new HashSet<>();
for (int i = 0; i < bundle.getEntry().size(); i++) {
// Create a corresponding response entry and add it to the response bundle.
Bundle.Entry requestEntry = bundle.getEntry().get(i);
Bundle.Entry responseEntry = null;
// Validate 'requestEntry' and update 'responseEntry' with any errors.
try {
Bundle.Entry.Request request = requestEntry.getRequest();
// Verify that the request field is present for 'batch' or 'transaction'
// type bundles (Bundle constraint bdl-3, also covers Bundle constraint bdl-5).
if (request == null) {
String msg = "Bundle.Entry is missing the 'request' field.";
throw buildRestException(msg, IssueType.REQUIRED);
}
// Verify that a method was specified.
if (request.getMethod() == null || request.getMethod().getValue() == null) {
String msg = "Bundle.Entry.request is missing the 'method' field";
throw buildRestException(msg, IssueType.REQUIRED);
}
// Verify that a URL was specified.
if (request.getUrl() == null || request.getUrl().getValue() == null) {
String msg = "Bundle.Entry.request is missing the 'url' field";
throw buildRestException(msg, IssueType.REQUIRED);
}
// Verify that the fullUrl field is not a duplicate if it specifies a local reference
// and if the request method is POST or PUT.
String fullUrl = requestEntry.getFullUrl() != null ? requestEntry.getFullUrl().getValue() : null;
if ((request.getMethod().equals(HTTPVerb.POST) || request.getMethod().equals(HTTPVerb.PUT))
&& fullUrl != null) {
String localIdentifier = retrieveLocalIdentifier(fullUrl);
if (localIdentifier != null) {
if (localIdentifiers.contains(localIdentifier)) {
String msg = "Duplicate local identifier encountered in bundled request entry: " + localIdentifier;
throw buildRestException(msg, IssueType.DUPLICATE);
}
localIdentifiers.add(localIdentifier);
}
}
// Verify that the search field is not present for 'batch' or 'transaction'
// type bundles (Bundle constraint bdl-2).
if (requestEntry.getSearch() != null) {
String msg = "Bundle.Entry.search must be empty.";
throw buildRestException(msg, IssueType.INVALID);
}
// Verify that the response field is not present for 'batch' or 'transaction'
// type bundles (Bundle constraint bdl-4).
if (requestEntry.getResponse() != null) {
String msg = "Bundle.Entry.response must be empty.";
throw buildRestException(msg, IssueType.INVALID);
}
// Verify that the fullUrl field is not a version specific reference
// (Bundle constraint bdl-8) and that the fullUrl field + resource.meta.versionId
// is unique for 'batch' or 'transaction' type bundles (Bundle constraint bdl-7)
Resource resource = requestEntry.getResource();
if (fullUrl != null) {
if (fullUrl.contains("/_history/")) {
String msg = "Bundle.Entry.fullUrl cannot be a version specific reference.";
throw buildRestException(msg, IssueType.VALUE);
}
String fullUrlPlusVersion = fullUrl;
if (resource != null && resource.getMeta() != null
&& resource.getMeta().getVersionId() != null && resource.getMeta().getVersionId().hasValue()) {
fullUrlPlusVersion = fullUrl + resource.getMeta().getVersionId().getValue();
} else {
fullUrlPlusVersion = fullUrl;
}
if (fullUrls.contains(fullUrlPlusVersion)) {
String msg = "Duplicate Bundle.Entry.fullUrl encountered in bundled request entry: " + fullUrl;
throw buildRestException(msg, IssueType.DUPLICATE);
}
fullUrls.add(fullUrlPlusVersion);
}
// Validate the resource for the requested HTTP method.
methodValidation(request.getMethod(), resource);
// If the request entry contains a resource, then validate it now.
if (resource != null) {
List issues = validateResource(resource);
if (!issues.isEmpty()) {
OperationOutcome oo = FHIRUtil.buildOperationOutcome(issues);
if (FHIRUtil.anyFailureInIssues(issues)) {
if (requestType == BundleType.Value.TRANSACTION) {
issueList.addAll(issues);
} else {
responseEntry = Entry.builder()
.response(Entry.Response.builder()
.status(SC_BAD_REQUEST_STRING)
.build())
.resource(oo)
.build();
}
} else {
responseEntry = Entry.builder()
.response(Entry.Response.builder()
.status(SC_ACCEPTED_STRING)
.outcome(oo)
.build())
.build();
}
}
}
} catch (FHIROperationException e) {
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "Failed to process BundleEntry ["
+ bundle.getEntry().indexOf(requestEntry) + "]", e);
}
if (requestType == BundleType.Value.TRANSACTION) {
issueList.addAll(e.getIssues());
} else {
Entry.Response response = Entry.Response.builder()
.status(SC_BAD_REQUEST_STRING)
.build();
responseEntry = Entry.builder()
.response(response)
.resource(FHIRUtil.buildOperationOutcome(e, false))
.build();
}
} finally {
if (responseEntry != null) {
validationResponseEntries.put(i, responseEntry);
}
}
} // End foreach requestEntry
// If this is a "transaction" interaction and we encountered any errors, then we'll
// abort processing this request right now since a transaction interaction is supposed to be
// all or nothing.
if (requestType == BundleType.Value.TRANSACTION && issueList.size() > 0) {
String msg =
"One or more errors were encountered while validating a 'transaction' request bundle.";
throw buildRestException(msg, IssueType.INVALID).withIssue(issueList);
}
return validationResponseEntries;
} finally {
log.exiting(this.getClass().getName(), "validateBundle");
}
}
/**
* Perform method-specific validation of the resource
*/
private void methodValidation(HTTPVerb method, Resource resource) throws FHIRPersistenceException, FHIROperationException {
switch(method.getValueAsEnum()) {
case PATCH:
case POST:
break;
case DELETE:
// If the "delete" operation isn't supported by the configured persistence layer,
// then we need to fail validation of this bundle entry.
if (!persistence.isDeleteSupported()) {
String msg = "Bundle.Entry.request contains unsupported HTTP method: "
+ method.getValue();
IssueType extendedIssueType = IssueType.NOT_SUPPORTED.toBuilder()
.extension(Extension.builder()
.url(EXT_BASE + "not-supported-detail")
.value(Code.of("interaction"))
.build())
.build();
throw buildRestException(msg, extendedIssueType);
}
// Purposefully fall through to next clause
case HEAD:
case GET:
if (resource != null) {
String msg =
"Bundle.Entry.resource not allowed for BundleEntry with " + method.getValue() + " method.";
throw buildRestException(msg, IssueType.INVALID);
}
break;
case PUT:
if (resource == null) {
String msg =
"Bundle.Entry.resource is required for BundleEntry with PUT method.";
throw buildRestException(msg, IssueType.INVALID);
}
break;
default:
String msg = "Bundle.Entry.request contains unsupported HTTP method: " + method.getValue();
throw buildRestException(msg, IssueType.INVALID);
}
}
/**
* This function will perform the version-aware update check by making sure that the If-Match request header value
* (if present) specifies a version # equal to the current latest version of the resource. If the check fails, then
* a FHIRRestException will be thrown. If the check succeeds then nothing occurs and processing continues.
*
* @param currentResource
* the current latest version of the resource
*/
private void performVersionAwareUpdateCheck(Resource currentResource, String ifMatchValue) throws FHIROperationException {
if (ifMatchValue != null) {
if (log.isLoggable(Level.FINE)) {
log.fine("Performing a version aware update. ETag value = " + ifMatchValue);
}
String ifMatchVersion = getVersionIdFromETagValue(ifMatchValue);
// Make sure that we got a version # from the request header.
// If not, then return a 400 Bad Request status code.
if (ifMatchVersion == null || ifMatchVersion.isEmpty()) {
throw buildRestException("Invalid ETag value specified in request: "
+ ifMatchValue, IssueType.PROCESSING);
}
if (log.isLoggable(Level.FINE)) {
log.fine("Version id from ETag value specified in request: " + ifMatchVersion);
}
// Retrieve the version #'s from the current and updated resources.
String currentVersion = null;
if (currentResource.getMeta() != null
&& currentResource.getMeta().getVersionId() != null) {
currentVersion = currentResource.getMeta().getVersionId().getValue();
}
// Next, make sure that the If-Match version matches the version # found
// in the current latest version of the resource.
// If they don't match we'll return an HTTP 412 (Precondition Failed) status code.
if (!ifMatchVersion.equals(currentVersion)) {
String msg = "If-Match version '" + ifMatchVersion
+ "' does not match current latest version of resource: " + currentVersion;
IssueType extendedIssueType = IssueType.CONFLICT.toBuilder()
.extension(Extension.builder()
.url(EXT_BASE + "http-failed-precondition")
.value(string("If-Match"))
.build())
.build();
throw buildRestException(msg, extendedIssueType);
}
}
}
private FHIROperationException buildUnsupportedResourceTypeException(String resourceTypeName) {
String msg = "'" + Encode.forHtml(resourceTypeName) + "' is not a valid resource type.";
Issue issue = OperationOutcome.Issue.builder()
.severity(IssueSeverity.FATAL)
.code(IssueType.NOT_SUPPORTED.toBuilder()
.extension(Extension.builder()
.url(EXT_BASE + "not-supported-detail")
.value(Code.of("resource"))
.build())
.build())
.details(CodeableConcept.builder().text(string(msg)).build())
.build();
return new FHIROperationException(msg).withIssue(issue);
}
private FHIROperationException buildRestException(String msg, IssueType issueType) {
return buildRestException(msg, issueType, IssueSeverity.FATAL);
}
private FHIROperationException buildRestException(String msg, IssueType issueType, IssueSeverity severity) {
return new FHIROperationException(msg).withIssue(buildOperationOutcomeIssue(severity, issueType, msg));
}
/**
* Builds an OperationOutcomeIssue with the respective values for some of the fields.
*/
private OperationOutcome.Issue buildOperationOutcomeIssue(IssueSeverity severity, IssueType type, String msg) {
return OperationOutcome.Issue.builder()
.severity(severity)
.code(type)
.details(CodeableConcept.builder().text(string(msg)).build())
.build();
}
/**
* Retrieves the version id value from an ETag header value. The ETag header value will be of the form:
* W/"".
*
* @param ifMatchValue
* the value of the If-Match request header.
*/
private String getVersionIdFromETagValue(String ifMatchValue) {
String result = null;
if (ifMatchValue != null) {
if (ifMatchValue.startsWith("W/")) {
String s = ifMatchValue.substring(2);
// If the part after "W/" starts and ends with a ",
// then extract the part between the " characters and we're done.
if (s.charAt(0) == '\"' && s.charAt(s.length() - 1) == '\"') {
result = s.substring(1, s.length() - 1);
}
}
}
return result;
}
/**
* This function will process each request contained in the specified request bundle, and update the response bundle
* with the appropriate response information.
*
* @param requestBundle
* the bundle containing the requests
* @param validationResponseEntries
* a map from entry indices to the corresponding response entries created during validation
* @param skippableUpdates
* if true, and the bundle contains an update for which the resource content in the update matches the existing
* resource on the server, then skip the update; if false, then always attempt the updates specified in the bundle
* @return a response bundle
*/
private Bundle processBundleEntries(Bundle requestBundle, Map validationResponseEntries,
boolean skippableUpdates) throws Exception {
log.entering(this.getClass().getName(), "processBundleEntries");
// Generate a request correlation id for this request bundle.
bundleRequestCorrelationId = UUID.randomUUID().toString();
if (log.isLoggable(Level.FINE)) {
log.fine("Processing request bundle, request-correlation-id=" + bundleRequestCorrelationId);
}
try {
// Build a mapping of local identifiers to external identifiers for local reference resolution.
// Map localRefMap = buildLocalRefMap(requestBundle, validationResponseEntries);
// Since 1869, the local ref map is populated in the phase 1 loop through the bundle
// entries where all the ids are assigned and lookups performed.
// Process entries.
BundleType.Value bundleType = requestBundle.getType().getValueAsEnum();
// Translate the entries in the bundle to a list of FHIRRestOperation commands which we
// then process in order
final boolean isTransactionBundle = bundleType == BundleType.Value.TRANSACTION;
FHIRRestBundleHelper bundleHelper = new FHIRRestBundleHelper(this);
List bundleInteractions = bundleHelper.translateBundleEntries(requestBundle,
validationResponseEntries, isTransactionBundle, bundleRequestCorrelationId, skippableUpdates);
List responseEntries = processBundleInteractions(bundleInteractions, validationResponseEntries, isTransactionBundle);
// Build the response bundle.
// TODO add support for posting history bundles
Bundle.Builder bundleResponseBuilder = Bundle.builder().entry(responseEntries);
if (bundleType == BundleType.Value.BATCH) {
bundleResponseBuilder.type(BundleType.BATCH_RESPONSE);
} else if (bundleType == BundleType.Value.TRANSACTION) {
bundleResponseBuilder.type(BundleType.TRANSACTION_RESPONSE);
}
return bundleResponseBuilder.build();
} finally {
if (log.isLoggable(Level.FINE)) {
log.fine("Finished processing request bundle, request-correlation-id="
+ bundleRequestCorrelationId);
}
// Clear the request correlation id field since we're done processing the bundle.
bundleRequestCorrelationId = null;
log.exiting(this.getClass().getName(), "processBundleEntries");
}
}
/**
* Process the given list of FHIRRestInteraction in order
* @param bundleInteractions
* @param validationResponseEntries
* @param transaction
* @return
* @throws Exception
*/
private List processBundleInteractions(List bundleInteractions,
Map validationResponseEntries, boolean transaction) throws Exception {
assert(bundleInteractions.size() > 0);
Entry[] responseEntries = new Entry[bundleInteractions.size()];
Map localRefMap = new HashMap<>();
// Run the prepare for all the bundle operations first. This allows us to perform
// some async operations which we can fetch the results for later, which can
// significantly reduce the overall request response time - especially important
// for large bundles.
FHIRTransactionHelper txn = null;
try {
// Always start the transaction here because we may need it to handle searches and reads
// during the phase 1 loop. This is read-only
txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
// Phase 1: Do any ifNoneExist search and assign new id and meta info. If there is an
// ifNoneExist hit, it is added to the corresponding responseEntries slot
FHIRRestInteractionVisitorMeta meta = new FHIRRestInteractionVisitorMeta(transaction, this, localRefMap, responseEntries);
for (FHIRRestInteraction interaction: bundleInteractions) {
interaction.accept(meta);
}
// When the bundle type is batch, we close out the current transaction so that each interaction
// will start its own. For transaction bundles, we use a single transaction until the end
if (!transaction) {
txn.commit();
txn = null;
}
// Phase 2: Now we have id values for each resource we can update any local references. At this point,
// the localRefMap should be fixed, so let's enforce that here. Once reference mapping is done, the
// resource is finalized - if the persistence layer supports payload offloading, we can do that now
localRefMap = Collections.unmodifiableMap(localRefMap);
FHIRRestInteractionVisitorReferenceMapping refMapper = new FHIRRestInteractionVisitorReferenceMapping(transaction, this, localRefMap, responseEntries);
FHIRRestInteractionVisitorOffload offloadVisitor = new FHIRRestInteractionVisitorOffload(transaction, this, localRefMap, responseEntries);
for (FHIRRestInteraction interaction: bundleInteractions) {
// Only process stuff we don't yet have a response for
if (responseEntries[interaction.getEntryIndex()] == null) {
interaction.accept(refMapper);
}
// Now that the resource will no longer be changed, we can
// initiate payload offload (when supported)
if (responseEntries[interaction.getEntryIndex()] == null) {
interaction.accept(offloadVisitor);
}
}
// Phase 3: Now run all the persistence operations in the correct order, injecting each result into the
// appropriate position in the responseEntries array. At the end of the loop, each slot will be filled.
FHIRRestInteractionVisitorPersist persist = new FHIRRestInteractionVisitorPersist(this, localRefMap, responseEntries, transaction);
for (FHIRRestInteraction interaction: bundleInteractions) {
// Only process stuff we don't yet have a response for
if (responseEntries[interaction.getEntryIndex()] == null) {
interaction.accept(persist);
}
}
} catch (Exception x) {
log.log(Level.SEVERE, "", x);
if (txn != null) {
txn.setRollbackOnly();
}
throw x;
} finally {
// close out the transaction if we need to
if (txn != null) {
txn.end();
txn = null;
}
}
return Arrays.asList(responseEntries);
}
/**
* common update to the operationContext
* @param operationContext
* @param method
*/
public void updateOperationContext(FHIROperationContext operationContext, String method) {
FHIRRequestContext requestContext = FHIRRequestContext.get();
operationContext.setProperty(FHIROperationContext.PROPNAME_URI_INFO, requestContext.getExtendedOperationProperties(FHIROperationContext.PROPNAME_URI_INFO));
operationContext.setProperty(FHIROperationContext.PROPNAME_HTTP_HEADERS, requestContext.getExtendedOperationProperties(FHIROperationContext.PROPNAME_HTTP_HEADERS));
operationContext.setProperty(FHIROperationContext.PROPNAME_SECURITY_CONTEXT, requestContext.getExtendedOperationProperties(FHIROperationContext.PROPNAME_SECURITY_CONTEXT));
operationContext.setProperty(FHIROperationContext.PROPNAME_HTTP_REQUEST, requestContext.getExtendedOperationProperties(FHIROperationContext.PROPNAME_HTTP_REQUEST));
operationContext.setProperty(FHIROperationContext.PROPNAME_METHOD_TYPE, method);
}
/**
* This function converts the specified query string (a String) into an equivalent MultivaluedMap
* containing the query parameters defined in the query string.
*
* @param queryString
* the query string to be processed
* @return
*/
private MultivaluedMap getQueryParameterMap(String queryString) {
MultivaluedMap result = null;
FHIRUrlParser parser = new FHIRUrlParser("foo?" + queryString);
result = parser.getQueryParameters();
return result;
}
/**
* This method will return the fullUrl if it is a local identifier, or return null
* otherwise.
*
* @param fullUrl
* the non-null bundle request entry fullUrl value
* @return the local identifier
*/
private String retrieveLocalIdentifier(String fullUrl) {
if (fullUrl.startsWith(LOCAL_REF_PREFIX)) {
if (log.isLoggable(Level.FINER)) {
log.finer("Request entry contains local identifier: " + fullUrl);
}
return fullUrl;
}
return null;
}
/**
* Creates a bundle that will hold results for a search operation.
*
* @param resourceResults
* the list of resource results to include in the bundle
* @param searchContext
* the FHIRSearchContext object associated with the search
* @param type
* the name of the resource type being searched
* @return the bundle
* @throws Exception
*/
Bundle createSearchResponseBundle(List> resourceResults, FHIRSearchContext searchContext, String type) throws Exception {
// throws if we have a count of more than 2,147,483,647 resources
UnsignedInt totalCount = searchContext.getTotalCount() != null ? UnsignedInt.of(searchContext.getTotalCount()) : null;
// generate ID for this bundle and set total
Bundle.Builder bundleBuilder = Bundle.builder()
.type(BundleType.SEARCHSET)
.id(UUID.randomUUID().toString())
.total(totalCount);
if (resourceResults.size() > 0) {
// Calculate how many resources are 'match' mode
int matchResourceCount = searchContext.getMatchCount();
List> matchResources = resourceResults.subList(0, matchResourceCount);
// Check if too many included resources
if (resourceResults.size() > matchResourceCount + searchContext.getMaxPageIncludeCount()) {
throw buildRestException("Number of returned 'include' resources exceeds allowable limit of " + searchContext.getMaxPageIncludeCount(),
IssueType.BUSINESS_RULE, IssueSeverity.ERROR);
}
// Find chained search parameters and find reference search parameters containing only a logical ID
List chainedSearchParameters = new ArrayList<>();
List logicalIdReferenceSearchParameters = new ArrayList<>();
for (QueryParameter queryParameter : searchContext.getSearchParameters()) {
// We do not need to look at canonical references here. They will not contain versions of the
// form '.../_history/xx' nor logical ID-only references, which is what we want to check
// these search parameters for.
if (!queryParameter.isReverseChained() && !queryParameter.isCanonical()) {
if (queryParameter.isChained()) {
chainedSearchParameters.add(queryParameter);
} else if (SearchConstants.Type.REFERENCE == queryParameter.getType()) {
// Look for logical ID-only value
for (QueryParameterValue value : queryParameter.getValues()) {
ReferenceValue refVal = ReferenceUtil.createReferenceValueFrom(value.getValueString(), null, ReferenceUtil.getBaseUrl(null));
if (refVal.getType() == ReferenceType.LITERAL_RELATIVE && refVal.getTargetResourceType() == null) {
logicalIdReferenceSearchParameters.add(queryParameter);
break;
}
}
}
}
}
List issues = new ArrayList<>();
if (searchContext.getOutcomeIssues() != null) {
issues.addAll(searchContext.getOutcomeIssues());
}
if (!chainedSearchParameters.isEmpty() || !logicalIdReferenceSearchParameters.isEmpty()) {
// Check 'match' resources for versioned references in chain search parameter fields and
// multiple resource types with matching logical ID in reference search parameter fields.
issues = performSearchReferenceChecks(type, chainedSearchParameters, logicalIdReferenceSearchParameters, matchResources);
}
for (ResourceResult resourceResult : resourceResults) {
Resource resource = resourceResult.getResource();
Entry.Builder entryBuilder = Entry.builder();
if (resource != null) {
if (resource.getId() != null) {
// do not set the entryBuilder.id value for response bundle
entryBuilder.fullUrl(Uri.of(getRequestBaseUri(type) + "/" + resource.getClass().getSimpleName() + "/" + resource.getId()));
} else {
String msg = "A resource with no id was found.";
log.warning(msg);
issues.add(FHIRUtil.buildOperationOutcomeIssue(IssueSeverity.WARNING, IssueType.NOT_SUPPORTED, msg));
}
entryBuilder.resource(resource);
} else if (searchContext.isIncludeResourceData()) {
String msg = "A resource with no data was found.";
log.warning(msg);
issues.add(FHIRUtil.buildOperationOutcomeIssue(IssueSeverity.WARNING, IssueType.NOT_SUPPORTED, msg));
} else {
// Off-spec - simply provide the url without the resource body. But in order
// to satisfy "Rule: must be a resource unless there's a request or response"
// we also add a minimal response element
final Uri uri = Uri.of(getRequestBaseUri(type) + "/" + resourceResult.getResourceTypeName() + "/" + resourceResult.getLogicalId());
com.ibm.fhir.model.resource.Bundle.Entry.Response response =
com.ibm.fhir.model.resource.Bundle.Entry.Response.builder()
.status("200")
.build();
entryBuilder.fullUrl(uri).response(response);
}
// Search mode is determined by the matchResourceCount, which will be decremented each time through the loop.
// If the count is greater than 0, the mode is MATCH. If less than or equal to 0, the mode is INCLUDE.
Entry entry = entryBuilder
.search(Search.builder()
.mode(matchResourceCount-- > 0 ? SearchEntryMode.MATCH : SearchEntryMode.INCLUDE)
.score(Decimal.of("1"))
.build())
.build();
bundleBuilder.entry(entry);
}
if (!issues.isEmpty()) {
// Add OperationOutcome resource containing issues
bundleBuilder.entry(
Entry.builder()
.search(Search.builder().mode(SearchEntryMode.OUTCOME).build())
.resource(FHIRUtil.buildOperationOutcome(issues))
.build());
}
}
Bundle bundle = bundleBuilder.build();
// Add the SUBSETTED tag, if the _elements search result parameter was applied to limit elements included in
// returned resources or _summary is required.
if (searchContext.hasElementsParameters()
|| (searchContext.hasSummaryParameter() && !searchContext.getSummaryParameter().equals(SummaryValueSet.FALSE))) {
bundle = FHIRUtil.addTag(bundle, SearchConstants.SUBSETTED_TAG);
}
return bundle;
}
/**
* For chained search, check 'match' resources for existence of a versioned reference in the field
* associated with the chain search parameter.
*
* For reference search specifying logical ID only, check 'match' resources for existence of multiple
* resource types containing the same logical ID in the field associated with the reference search parameter.
*
* @param resourceType
* The search resource type.
* @param chainQueryParameters
* The chained query parameters. These will be mutually exclusive of the logicalIdReferenceQueryParameters.
* @param logicalIdReferenceQueryParameters
* The list of reference query parameters that only specified a logical ID.
* @param matchResources
* The list of 'match' resources to check.
* @return
* A list of Issues, one per resource in which a versioned reference is found.
* @throws Exception if multiple resource types containing the same logical ID are found
*/
private List performSearchReferenceChecks(String resourceType, List chainQueryParameters,
List logicalIdReferenceQueryParameters, List> matchResources) throws Exception {
List issues = new ArrayList<>();
if (!chainQueryParameters.isEmpty() || !logicalIdReferenceQueryParameters.isEmpty()) {
// Build a map of parameter name to SearchParameter for all queryParameters.
// Since the search was successful, we can assume search parameters exist, are valid, and of type Reference.
// However, if this is a whole-system search, we will need to get the SearchParameters based on
// the resource type returned.
Map searchParameterMap = new HashMap<>();
if (!Resource.class.getSimpleName().equals(resourceType)) {
Class resourceTypeClass = ModelSupport.getResourceType(resourceType);
for (QueryParameter queryParameter : chainQueryParameters) {
searchParameterMap.put(queryParameter, searchHelper.getSearchParameter(resourceTypeClass, queryParameter.getCode()));
}
for (QueryParameter queryParameter : logicalIdReferenceQueryParameters) {
searchParameterMap.put(queryParameter, searchHelper.getSearchParameter(resourceTypeClass, queryParameter.getCode()));
}
}
List queryParameters = new ArrayList<>(chainQueryParameters);
queryParameters.addAll(logicalIdReferenceQueryParameters);
Map logicalIdToTypeMap = new HashMap<>();
FHIRPathEvaluator evaluator = FHIRPathEvaluator.evaluator();
// Loop through the resources, looking for versioned references and references to multiple resource types for the same logical ID
for (ResourceResult resourceResult : matchResources) {
Resource resource = resourceResult.getResource();
if (resource == null) {
log.warning("Unexpected null resource: " + resourceResult.toString());
throw new FHIRPersistenceException("Search reference check contained a null resource");
}
// A flag that indicates whether we need to take a closer look at the reference values or not
boolean needsEval = false;
// If any of the reference values are "versioned"
// then we'll need to check that they aren't used for chaining
// TODO Should we pass the previously-gathered set of references into the method instead?
CollectingVisitor refCollector = new CollectingVisitor<>(Reference.class);
resource.accept(refCollector);
List references = refCollector.getResult();
for (Reference ref : references) {
if (ref.getReference() != null && ref.getReference().getValue() != null
&& ref.getReference().getValue().contains("/_history/")) {
needsEval = true;
break;
}
}
// If any of the ids are "logical id only" (i.e. have no target resource type info),
// then we'll need to check that they aren't ambiguous
if (!logicalIdReferenceQueryParameters.isEmpty()) {
needsEval = true;
}
if (needsEval) {
validateReferenceParams(chainQueryParameters, logicalIdReferenceQueryParameters, issues,
searchParameterMap, queryParameters, logicalIdToTypeMap, evaluator, resource);
}
}
}
return issues;
}
private void validateReferenceParams(List chainQueryParameters, List logicalIdReferenceQueryParameters,
List issues, Map searchParameterMap, List queryParameters,
Map logicalIdToTypeMap, FHIRPathEvaluator evaluator, Resource resource)
throws Exception, FHIRPathException, FHIRSearchException, FHIROperationException {
EvaluationContext evaluationContext = new EvaluationContext(resource);
for (QueryParameter queryParameter : queryParameters) {
SearchParameter searchParameter = searchParameterMap.get(queryParameter);
if (searchParameter == null) {
searchParameter = searchHelper.getSearchParameter(resource.getClass(), queryParameter.getCode());
}
// For logical ID check, only need to look at search parameters with more than one target resource type
if (logicalIdReferenceQueryParameters.contains(queryParameter) && searchParameter.getTarget().size() == 1) {
continue;
}
Collection nodes = evaluator.evaluate(evaluationContext, searchParameter.getExpression().getValue());
for (FHIRPathNode node : nodes) {
Reference reference = node.asElementNode().element().as(Reference.class);
ReferenceValue rv = ReferenceUtil.createReferenceValueFrom(reference, ReferenceUtil.getBaseUrl(null));
if (chainQueryParameters.contains(queryParameter) && rv.getVersion() != null &&
(rv.getTargetResourceType() == null || rv.getTargetResourceType().equals(queryParameter.getModifierResourceTypeName()))) {
// Found versioned reference value
String msg = "Resource with id '" + resource.getId() +
"' contains a versioned reference in an element used for chained search, but chained search does not act on versioned references.";
issues.add(FHIRUtil.buildOperationOutcomeIssue(IssueSeverity.WARNING, IssueType.NOT_SUPPORTED, msg, node.path()));
} else if (logicalIdReferenceQueryParameters.contains(queryParameter) && rv.getTargetResourceType() != null &&
!rv.getTargetResourceType().equals(logicalIdToTypeMap.computeIfAbsent(queryParameter.getCode() + "|" + rv.getValue(), v -> rv.getTargetResourceType()))) {
// Found multiple resource types this logical ID
String msg = "Multiple resource type matches found for logical ID '" + rv.getValue() +
"' for search parameter '" + queryParameter.getCode() + "'.";
throw buildRestException(msg, IssueType.INVALID, IssueSeverity.ERROR);
}
}
}
}
/**
* Creates a bundle that will hold the results of a history operation.
*
* @param resourcesResults
* the list of resource results to include in the history bundle
* @param historyContext
* the FHIRHistoryContext associated with the history operation
* @param type
* the name of the resource type on which the history operation was requested
* @return the bundle
* @throws Exception
*/
private Bundle createHistoryBundle(List> resourceResults, FHIRHistoryContext historyContext, String type)
throws Exception {
// throws if we have a count of more than 2,147,483,647 resources
UnsignedInt totalCount = historyContext.getTotalCount() != null ? UnsignedInt.of(historyContext.getTotalCount()) : null;
// generate ID for this bundle and set the "total" field for the bundle
Bundle.Builder bundleBuilder = Bundle.builder()
.type(BundleType.HISTORY)
.id(UUID.randomUUID().toString())
.total(totalCount);
for (int i = 0; i < resourceResults.size(); i++) {
ResourceResult resourceResult = resourceResults.get(i);
Resource resource = resourceResult.getResource();
// Note that the resource object may be null if it has been erased
if (resource != null && resource.getId() == null) {
String msg = "A resource with no id was found.";
log.warning(msg);
throw new IllegalStateException(msg);
}
// Determine the correct method to include in this history entry (POST, PUT, DELETE).
HTTPVerb method;
String status;
if (resourceResult.isDeleted() || resource == null) {
method = HTTPVerb.DELETE;
status = "200";
} else if (resourceResult.getVersion() == 1) {
// it may have been a PUT in the create-on-update case, but we use POST here anyway
method = HTTPVerb.POST;
status = "201";
} else {
method = HTTPVerb.PUT;
// it may have been a 201 (Created) in the "undelete" case, but we use 200 here anyway
status = "200";
}
// Create the 'request' entry, and set the request.url field.
// 'create' --> url = ""
// 'update'/'delete' --> url = "/"
final String resourceType = resourceResult.getResourceTypeName();
final String resourcePath = resourceType + "/" + resourceResult.getLogicalId();
Entry.Request request = Entry.Request.builder()
.method(method)
.url(Url.of(method == HTTPVerb.POST ? resourceType : resourcePath))
.build();
String fullUrl = getRequestBaseUri(type) + "/" + resourcePath;
Entry.Response response = Entry.Response.builder()
.status(status)
.etag(getEtagValue(resourceResult.getVersion()))
.location(Uri.of(fullUrl + "/_history/" + resourceResult.getVersion()))
.lastModified(com.ibm.fhir.model.type.Instant.of(resourceResult.getLastUpdated().atZone(UTC)))
.location(Uri.of(fullUrl + "/_history/" + resourceResult.getVersion()))
.build();
Entry entry = Entry.builder()
.fullUrl(Uri.of(fullUrl))
.request(request)
.response(response)
.resource(resource)
.build();
bundleBuilder.entry(entry);
}
return bundleBuilder.build();
}
/**
* Retrieves the shared interceptor mgr instance from the servlet context.
*/
private FHIRPersistenceInterceptorMgr getInterceptorMgr() {
return FHIRPersistenceInterceptorMgr.getInstance();
}
private Bundle addLinks(FHIRPagingContext context, Bundle responseBundle, String requestUri) throws Exception {
String selfUri = null;
SummaryValueSet summaryParameter = null;
Bundle.Builder bundleBuilder = responseBundle.toBuilder();
if (context instanceof FHIRSearchContext) {
FHIRSearchContext searchContext = (FHIRSearchContext) context;
summaryParameter = searchContext.getSummaryParameter();
try {
selfUri = SearchHelper.buildSearchSelfUri(requestUri, searchContext);
} catch (Exception e) {
log.log(Level.WARNING, "Unable to construct self link for search result bundle; using the request URI instead.", e);
}
}
if (selfUri == null) {
selfUri = requestUri;
}
// create 'self' link
Bundle.Link selfLink = Bundle.Link.builder()
.relation(string("self"))
.url(Url.of(selfUri))
.build();
bundleBuilder.link(selfLink);
// If for search with _summary=count or pageSize == 0, then don't add previous and next links.
if (!SummaryValueSet.COUNT.equals(summaryParameter) && context.getPageSize() > 0) {
// In case the currently requested page is < 1, ensure the next link points to page 1,
// to avoid unnecessarily paging through additional page numbers < 1
int nextPageNumber = Math.max(context.getPageNumber() + 1, 1);
if (nextPageNumber <= context.getLastPageNumber()
&& (nextPageNumber == 1 || context.getTotalCount() != null || context.getMatchCount() == context.getPageSize())) {
// starting with the self URI
String nextLinkUrl = selfUri;
// remove existing _page parameters from the query string
nextLinkUrl = nextLinkUrl.replace("&_page=" + context.getPageNumber(), "").replace("_page="
+ context.getPageNumber() + "&", "").replace("_page=" + context.getPageNumber(), "");
if (nextLinkUrl.contains("?")) {
if (!nextLinkUrl.endsWith("?")) {
// there are other parameters in the query string
nextLinkUrl += "&";
}
} else {
nextLinkUrl += "?";
}
// add new _page parameter to the query string
nextLinkUrl += "_page=" + nextPageNumber;
// create 'next' link
Bundle.Link nextLink =
Bundle.Link.builder().relation(string("next")).url(Url.of(nextLinkUrl)).build();
bundleBuilder.link(nextLink);
}
int prevPageNumber = Math.min(context.getPageNumber() - 1, context.getLastPageNumber());
if (prevPageNumber > 0) {
// starting with the original request URI
String prevLinkUrl = requestUri;
// remove existing _page parameters from the query string
prevLinkUrl =
prevLinkUrl.replace("&_page=" + context.getPageNumber(), "").replace("_page="
+ context.getPageNumber() + "&", "").replace("_page="
+ context.getPageNumber(), "");
if (prevLinkUrl.contains("?")) {
if (!prevLinkUrl.endsWith("?")) {
// there are other parameters in the query string
prevLinkUrl += "&";
}
} else {
prevLinkUrl += "?";
}
// add new _page parameter to the query string
prevLinkUrl += "_page=" + prevPageNumber;
// create 'previous' link
Bundle.Link prevLink =
Bundle.Link.builder().relation(string("previous")).url(Url.of(prevLinkUrl)).build();
bundleBuilder.link(prevLink);
}
}
return bundleBuilder.build();
}
/**
* This method returns the "base URI" associated with the current request. For example, if a client invoked POST
* https://myhost:9443/fhir-server/api/v4/Patient to create a Patient resource, this method would return
* "https://myhost:9443/fhir-server/api/v4".
*
* @param type
* The resource type associated with the request URI (e.g. "Patient" in the case of
* https://myhost:9443/fhir-server/api/v4/Patient), or null if there is no such resource type
* @return The base endpoint URI associated with the current request.
* @throws Exception if an error occurs while reading the config
* @implNote This method uses {@link FHIRRequestContext#getOriginalRequestUri()} to get the original request URI
* and then strips it to the Service Base URL
*/
public static String getRequestBaseUri(String type) throws Exception {
String baseUri = null;
String requestUri = FHIRRequestContext.get().getOriginalRequestUri();
// Strip off everything after the path
int queryPathSeparatorLoc = requestUri.indexOf("?");
if (queryPathSeparatorLoc != -1) {
baseUri = requestUri.substring(0, queryPathSeparatorLoc);
} else {
baseUri = requestUri;
}
// Strip off any path elements after the base
if (type != null && !type.isEmpty()) {
int resourceNamePathLocation = baseUri.indexOf("/" + type + "/");
if (resourceNamePathLocation != -1) {
baseUri = baseUri.substring(0, resourceNamePathLocation);
} else {
resourceNamePathLocation = baseUri.lastIndexOf("/" + type);
if (resourceNamePathLocation != -1) {
baseUri = baseUri.substring(0, resourceNamePathLocation);
} else {
// Assume the request was a batch/transaction; nothing to strip
}
}
}
// Strip any path segments for whole-system interactions
// (in case of whole-system search, "Resource" is passed as the type, or $everything-based search)
if (type == null || type.isEmpty() || "Resource".equals(type) || baseUri.contains("$everything")) {
if (baseUri.endsWith("/_search")) {
baseUri = baseUri.substring(0, baseUri.length() - "/_search".length());
} else if (baseUri.endsWith("/_history")) {
baseUri = baseUri.substring(0, baseUri.length() - "/_history".length());
} else if (baseUri.contains("/$")) {
baseUri = baseUri.substring(0, baseUri.lastIndexOf("/$"));
}
}
return baseUri;
}
@Override
public Map buildPersistenceEventProperties(String type, String id,
String version, FHIRSearchContext searchContext, FHIRSystemHistoryContext systemHistoryContext) throws FHIRPersistenceException {
Map props = new HashMap<>();
props.put(FHIRPersistenceEvent.PROPNAME_PERSISTENCE_IMPL, persistence);
if (type != null) {
props.put(FHIRPersistenceEvent.PROPNAME_RESOURCE_TYPE, type);
}
if (id != null) {
props.put(FHIRPersistenceEvent.PROPNAME_RESOURCE_ID, id);
}
if (version != null) {
props.put(FHIRPersistenceEvent.PROPNAME_VERSION_ID, version);
}
if (searchContext != null) {
props.put(FHIRPersistenceEvent.PROPNAME_SEARCH_CONTEXT_IMPL, searchContext);
}
if (systemHistoryContext != null) {
props.put(FHIRPersistenceEvent.PROPNAME_SYSTEM_HISTORY_CONTEXT_IMPL, systemHistoryContext);
}
return props;
}
/**
* Sets various properties on the FHIROperationContext instance.
*
* @param operationContext
* the FHIROperationContext on which to set the properties
* @param resourceTypeName
* @param requestParameters
* @throws Exception
*/
private void setOperationContextProperties(FHIROperationContext operationContext, String resourceTypeName, Parameters requestParameters)
throws Exception {
operationContext.setProperty(FHIROperationContext.PROPNAME_REQUEST_BASE_URI, getRequestBaseUri(resourceTypeName));
operationContext.setProperty(FHIROperationContext.PROPNAME_REQUEST_PARAMETERS, requestParameters);
operationContext.setProperty(FHIROperationContext.PROPNAME_PERSISTENCE_IMPL, persistence);
}
@Override
public int doReindex(FHIROperationContext operationContext, OperationOutcome.Builder operationOutcomeResult, Instant tstamp,
List indexIds, String resourceLogicalId) throws Exception {
int result = 0;
// Since the try logic is slightly different in the code paths, we want to dispatch to separate methods to simplify the logic.
if (indexIds == null) {
result = doReindexSingle(operationOutcomeResult, tstamp, resourceLogicalId);
} else {
result = doReindexList(operationOutcomeResult, tstamp, indexIds);
}
return result;
}
/**
* encapsulates the logic to process a list with graduated backoff through the full list of indexIds
*
* @param operationOutcomeResult
* @param tstamp
* @param indexIds
* @return
* @throws Exception
*/
public int doReindexList(OperationOutcome.Builder operationOutcomeResult, Instant tstamp, List indexIds) throws Exception {
// If the indexIds are empty or null, then it's not properly formed.
if (indexIds == null || indexIds.isEmpty()) {
throw new IllegalArgumentException("No indexIds sent to the $reindex list method");
}
/*
* How the backoff works...
* indexIds[1,2,3,4,5,6,7,8,9,10]
*
* Pass 1 left=0, right=10, max=10
* Result: Deadlock
*
* Pass2 left=0, right=1, max=10
* Move over by 1
* Result: Pass
*
* Pass3 left=1, right=2, max=10
* Move over by 1
* Result: Pass
*
* ... all the way up to 10
*
* Return total count back to caller.
*
* @implNote tried divide and conquer and it caused it to try large pass fail, small pass succeed, and therefore chose a small linear pass.
*/
// Maximum attempts to retry across all windows.
final int TX_ATTEMPTS = 10;
int result = 0;
int max = indexIds.size();
int left = 0;
int right = max;
int window = 0;
int attempt = 1;
while (left < max && attempt <= TX_ATTEMPTS) {
window++;
if (log.isLoggable(Level.FINE)) {
log.fine("$reindex window [" + window + "/" + attempt + "] -> left=[" + left + "] right=[" + right + "] max=[" + max + "]");
}
boolean backoff = false;
List subListIndexIds = indexIds.subList(left, right);
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
try {
FHIRPersistenceContext persistenceContext = null;
result += persistence.reindex(persistenceContext, operationOutcomeResult, tstamp, subListIndexIds, null);
} catch (FHIRPersistenceDataAccessException x) {
// At this point, the transaction is marked for rollback
if (x.isTransactionRetryable() && ++attempt <= TX_ATTEMPTS) {
if (x.getCause() instanceof LockException && ((LockException) x.getCause()).isDeadlock()) {
backoff = true;
long wait = RANDOM.nextInt(5000);
log.info("attempt #" + window + "/" + attempt + " failed, retrying transaction, backing off [wait=" + wait + "ms]");
Thread.sleep(wait);
} else {
log.info("attempt #" + window + "/" + attempt + " failed, retrying transaction, not backing off");
}
} else {
throw x;
}
} finally {
txn.end();
}
// backoff controls how we increment the window.
if (backoff) {
// we're now going to move over one at a time.
right = left + 1;
} else {
// we're sliding over by one more
left = right;
right += 1;
}
}
return result;
}
/**
* do a single reindex on a specific resourceLogicalId
*
* @param operationOutcomeResult
* @param tstamp
* @param resourceLogicalId
* @return
* @throws Exception
*/
public int doReindexSingle(OperationOutcome.Builder operationOutcomeResult, Instant tstamp, String resourceLogicalId) throws Exception {
int result = 0;
// handle some retries in case of deadlock exceptions
final int TX_ATTEMPTS = 5;
int attempt = 1;
do {
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
try {
FHIRPersistenceContext persistenceContext = null;
result = persistence.reindex(persistenceContext, operationOutcomeResult, tstamp, null, resourceLogicalId);
attempt = TX_ATTEMPTS; // end the retry loop
} catch (FHIRPersistenceDataAccessException x) {
if (x.isTransactionRetryable() && attempt < TX_ATTEMPTS) {
log.info("attempt #" + attempt + " failed, retrying transaction");
} else {
throw x;
}
} finally {
txn.end();
}
} while (attempt++ < TX_ATTEMPTS);
return result;
}
@Override
public List validateResource(Resource resource) throws FHIROperationException {
Set atLeastOneProfiles = new HashSet<>();
Set atLeastOneProfilesWithoutVersion = new HashSet<>();
Set notAllowedProfiles = new HashSet<>();
Set notAllowedProfilesWithoutVersion = new HashSet<>();
boolean allowUnknown;
Map defaultVersions = new HashMap<>();
boolean defaultVersionsSpecified = false;
Resource resourceToValidate = resource;
// Retrieve the profile configuration
try {
StringBuilder defaultProfileConfigPath = new StringBuilder(FHIRConfiguration.PROPERTY_RESOURCES).append("/Resource/")
.append(FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES).append("/");
StringBuilder resourceSpecificProfileConfigPath = new StringBuilder(FHIRConfiguration.PROPERTY_RESOURCES).append("/")
.append(resource.getClass().getSimpleName()).append("/").append(FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES)
.append("/");
// Get the 'atLeastOne' profile list
List resourceSpecificAtLeastOneProfiles =
FHIRConfigHelper.getStringListProperty(resourceSpecificProfileConfigPath.toString() +
FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES_AT_LEAST_ONE);
if (resourceSpecificAtLeastOneProfiles != null) {
atLeastOneProfiles.addAll(resourceSpecificAtLeastOneProfiles);
} else {
List defaultAtLeastOneProfiles =
FHIRConfigHelper.getStringListProperty(defaultProfileConfigPath.toString() +
FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES_AT_LEAST_ONE);
if (defaultAtLeastOneProfiles != null) {
atLeastOneProfiles.addAll(defaultAtLeastOneProfiles);
}
}
// Build the list of 'atLeastOne' profiles that didn't specify a version
for (String profile : atLeastOneProfiles) {
if (!profile.contains("|")) {
atLeastOneProfilesWithoutVersion.add(profile);
}
}
if (log.isLoggable(Level.FINER)) {
log.finer("Required profile list: " + atLeastOneProfiles);
}
// Get the 'notAllowed' profile list
List resourceSpecificNotAllowedProfiles =
FHIRConfigHelper.getStringListProperty(resourceSpecificProfileConfigPath.toString() +
FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES_NOT_ALLOWED);
if (resourceSpecificNotAllowedProfiles != null) {
notAllowedProfiles.addAll(resourceSpecificNotAllowedProfiles);
} else {
List defaultNotAllowedProfiles =
FHIRConfigHelper.getStringListProperty(defaultProfileConfigPath.toString() +
FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES_NOT_ALLOWED);
if (defaultNotAllowedProfiles != null) {
notAllowedProfiles.addAll(defaultNotAllowedProfiles);
}
}
// Build the list of 'notAllowed' profiles that didn't specify a version
for (String profile : notAllowedProfiles) {
if (!profile.contains("|")) {
notAllowedProfilesWithoutVersion.add(profile);
}
}
if (log.isLoggable(Level.FINER)) {
log.finer("Not allowed profile list: " + notAllowedProfiles);
}
// Get the 'allowUnknown' property
Boolean resourceSpecificAllowUnknown =
FHIRConfigHelper.getBooleanProperty(resourceSpecificProfileConfigPath.toString() +
FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES_ALLOW_UNKNOWN, null);
if (resourceSpecificAllowUnknown != null) {
allowUnknown = resourceSpecificAllowUnknown;
} else {
allowUnknown = FHIRConfigHelper.getBooleanProperty(defaultProfileConfigPath.toString() +
FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES_ALLOW_UNKNOWN, Boolean.TRUE);
}
if (log.isLoggable(Level.FINER)) {
log.finer("Allow unknown: " + allowUnknown);
}
// Get the 'defaultVersions' entries
PropertyGroup resourceSpecificDefaultVersionsGroup =
FHIRConfigHelper.getPropertyGroup(resourceSpecificProfileConfigPath.toString() +
FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES_DEFAULT_VERSIONS);
if (resourceSpecificDefaultVersionsGroup != null) {
defaultVersionsSpecified = true;
for (PropertyEntry entry : resourceSpecificDefaultVersionsGroup.getProperties()) {
defaultVersions.put(entry.getName(), (String) entry.getValue());
}
} else {
PropertyGroup allResourceDefaultVersionsGroup =
FHIRConfigHelper.getPropertyGroup(defaultProfileConfigPath.toString() +
FHIRConfiguration.PROPERTY_FIELD_RESOURCES_PROFILES_DEFAULT_VERSIONS);
if (allResourceDefaultVersionsGroup != null) {
defaultVersionsSpecified = true;
for (PropertyEntry entry : allResourceDefaultVersionsGroup.getProperties()) {
defaultVersions.put(entry.getName(), (String) entry.getValue());
}
}
}
if (log.isLoggable(Level.FINER)) {
log.finer("Default profile versions: [");
for (String profile : defaultVersions.keySet()) {
log.finer(" " + profile + " : " + defaultVersions.get(profile));
}
log.finer("]");
}
} catch (Exception e) {
throw new FHIROperationException("Error retrieving profile configuration.", e);
}
// Validate asserted profiles if necessary:
// - if 'atLeastOne' is a non-empty list OR
// - if 'notAllowed' is a non-empty list OR
// - if 'allowUnknown' is set to false OR
// - if 'defaultVersions' exists (empty or not)
List issues = new ArrayList<>();
if (!notAllowedProfiles.isEmpty() || !atLeastOneProfiles.isEmpty() || !allowUnknown || defaultVersionsSpecified) {
boolean validProfileFound = false;
boolean defaultVersionUsed = false;
List defaultVersionAssertedProfiles = new ArrayList<>();;
// Get the profiles asserted for this resource
List resourceAssertedProfiles = ProfileSupport.getResourceAssertedProfiles(resource);
if (log.isLoggable(Level.FINE)) {
log.fine("Asserted profiles: " + resourceAssertedProfiles);
}
// Validate the asserted profiles
for (String resourceAssertedProfile : resourceAssertedProfiles) {
// Check if asserted profile contains a version
String strippedAssertedProfile = null;
int index = resourceAssertedProfile.indexOf("|");
if (index != -1) {
strippedAssertedProfile = resourceAssertedProfile.substring(0, index);
} else {
// Check if assertedProfile has a default version
String defaultVersion = defaultVersions.get(resourceAssertedProfile);
if (defaultVersion != null) {
defaultVersionUsed = true;
strippedAssertedProfile = resourceAssertedProfile;
resourceAssertedProfile = resourceAssertedProfile + "|" + defaultVersion;
}
}
defaultVersionAssertedProfiles.add(Canonical.of(resourceAssertedProfile));
if (!notAllowedProfiles.isEmpty() || !atLeastOneProfiles.isEmpty()) {
// For 'atLeastOne' profiles, check that at least one asserted profile is in the list of 'atLeastOne' profiles.
// For 'notAllowed' profiles, check that no asserted profile is in the list of 'notAllowed' profiles.
// If an 'atLeastOne' or 'notAllowed' profile specifies a version, an asserted profile must be an exact match.
// If an 'atLeastOne' or 'notAllowed' profile does not specify a version, any asserted profile of the same name
// will be a match regardless if it specifies a version or not.
if (notAllowedProfiles.contains(resourceAssertedProfile) ||
notAllowedProfilesWithoutVersion.contains(strippedAssertedProfile)) {
// For 'notAllowed' profiles, a match means an invalid profile was found
if (log.isLoggable(Level.FINE)) {
log.fine("Not allowed asserted profile found: '" + resourceAssertedProfile + "'");
}
issues.add(buildOperationOutcomeIssue(IssueSeverity.ERROR, IssueType.BUSINESS_RULE,
"A profile was specified which is not allowed. Resources of type '" + resource.getClass().getSimpleName() +
"' are not allowed to declare conformance to any of the following profiles: " + notAllowedProfiles));
}
if (atLeastOneProfiles.contains(resourceAssertedProfile) ||
atLeastOneProfilesWithoutVersion.contains(strippedAssertedProfile)) {
// For 'atLeastOne' profiles, a match means a valid profile was found
if (log.isLoggable(Level.FINE)) {
log.fine("Valid asserted profile found: '" + resourceAssertedProfile + "'");
}
validProfileFound = true;
}
}
if (!allowUnknown) {
// Check if asserted profile is supported
StructureDefinition profile = ProfileSupport.getProfile(resourceAssertedProfile);
if (profile == null) {
if (log.isLoggable(Level.FINE)) {
log.fine("Not supported asserted profile found: '" + resourceAssertedProfile + "'");
}
issues.add(buildOperationOutcomeIssue(IssueSeverity.ERROR, IssueType.NOT_SUPPORTED,
"Profile '" + resourceAssertedProfile + "' is not supported"));
}
}
}
// Check if a profile is required but no valid profile asserted
if (!atLeastOneProfiles.isEmpty() && !validProfileFound) {
issues.add(buildOperationOutcomeIssue(IssueSeverity.ERROR, IssueType.BUSINESS_RULE,
"A required profile was not specified. Resources of type '" + resource.getClass().getSimpleName() +
"' must declare conformance to at least one of the following profiles: " + atLeastOneProfiles));
}
if (!issues.isEmpty()) {
return issues;
}
// If any asserted profiles have a default version specified, make a copy of the
// resource with the new asserted profile values and validate against the copy.
if (defaultVersionUsed) {
Meta metaCopy = resource.getMeta().toBuilder().profile(defaultVersionAssertedProfiles).build();
resourceToValidate = resource.toBuilder().meta(metaCopy).build();
}
}
try {
issues = validator.validate(resourceToValidate);
} catch (FHIRValidationException e) {
throw new FHIROperationException("Error validating resource.", e);
}
return issues;
}
@Override
public void validateInteraction(Interaction interaction, String resourceType) throws FHIROperationException {
if ("Resource".equals(resourceType)) {
switch (interaction) {
case SEARCH:
if (!resourcesConfig.isWholeSystemSearchSupported()) {
throw buildRestException("Whole system search is disabled on the server.", IssueType.BUSINESS_RULE, IssueSeverity.ERROR);
}
return;
case HISTORY:
if (!resourcesConfig.isWholeSystemHistorySupported()) {
throw buildRestException("Whole system history is disabled on the server.", IssueType.BUSINESS_RULE, IssueSeverity.ERROR);
}
return;
default:
throw new IllegalStateException("Search and history are the only supported system-level interactions");
}
}
if (!resourcesConfig.getSupportedResourceTypes().contains(resourceType)) {
throw buildRestException("The requested resource type '" + resourceType + "' is not found",
IssueType.NOT_FOUND, IssueSeverity.ERROR);
}
// fhir-config and fhir-server have two different Interaction enums with the same values
// we should merge those into a single enum and put it somewhere common (fhir-core?)
com.ibm.fhir.config.Interaction configInteraction = com.ibm.fhir.config.Interaction.from(interaction.value());
if (!resourcesConfig.getSupportedResourceTypes(configInteraction).contains(resourceType)) {
throw buildRestException("The requested interaction of type '" + interaction.value() + "' is not allowed for resource type '" + resourceType + "'",
IssueType.BUSINESS_RULE, IssueSeverity.ERROR);
}
}
@Override
public Bundle doHistory(MultivaluedMap queryParameters, String requestUri, String resourceType) throws Exception {
log.entering(this.getClass().getName(), "doHistory");
// Validate that the interaction is allowed
if (resourceType == null) {
validateInteraction(Interaction.HISTORY, "Resource");
} else {
validateInteraction(Interaction.HISTORY, resourceType);
}
// extract the query parameters
FHIRRequestContext requestContext = FHIRRequestContext.get();
if (requestContext.isReturnPreferenceDefault()) {
// For _history, override the default preference to be REPRESENTATION so resources
// are returned in the response bundle per the R4 spec.
requestContext.setReturnPreference(HTTPReturnPreference.REPRESENTATION);
}
FHIRSystemHistoryContext historyContext = FHIRPersistenceUtil.parseSystemHistoryParameters(queryParameters,
HTTPHandlingPreference.LENIENT.equals(requestContext.getHandlingPreference()), resourcesConfig);
// If HTTPReturnPreference is REPRESENTATION, we fetch the resources and include them
// in the response bundle. To make it simple, we make the records and resources the same
// size and in the same order
List records;
List resources = null;
// First, invoke the 'beforeHistory' interceptor methods.
FHIRPersistenceEvent event =
new FHIRPersistenceEvent(null, buildPersistenceEventProperties(resourceType == null ? "Resource" : resourceType, null, null, null, historyContext));
getInterceptorMgr().fireBeforeHistoryEvent(event);
// Start a new txn in the persistence layer if one is not already active.
Integer count = historyContext.getCount();
Instant since = historyContext.getSince() != null && historyContext.getSince().getValue() != null ? historyContext.getSince().getValue().toInstant() : null;
Instant before = historyContext.getBefore() != null && historyContext.getBefore().getValue() != null ? historyContext.getBefore().getValue().toInstant() : null;
FHIRTransactionHelper txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
try {
if (count == null) {
count = DEFAULT_HISTORY_ENTRIES;
} else if (count > MAX_HISTORY_ENTRIES) {
count = MAX_HISTORY_ENTRIES;
}
if (resourceType != null) {
// Use the resource type on the path, ignoring any _type parameter
records = persistence.changes(count, since, before, historyContext.getChangeIdMarker(), Collections.singletonList(resourceType), historyContext.isExcludeTransactionTimeoutWindow(),
historyContext.getHistorySortOrder());
} else if (historyContext.getResourceTypes().size() > 0) {
// New API allows us to filter using multiple resource type names, but first we
// have to check the interaction is allowed for each one
for (String rt: historyContext.getResourceTypes()) {
validateInteraction(Interaction.HISTORY, rt);
}
records = persistence.changes(count, since, before, historyContext.getChangeIdMarker(), historyContext.getResourceTypes(),
historyContext.isExcludeTransactionTimeoutWindow(), historyContext.getHistorySortOrder());
} else {
// no resource type filter
final List NULL_RESOURCE_TYPE_NAMES = null;
records = persistence.changes(count, since, before, historyContext.getChangeIdMarker(), NULL_RESOURCE_TYPE_NAMES, historyContext.isExcludeTransactionTimeoutWindow(),
historyContext.getHistorySortOrder());
}
if (historyContext.getReturnPreference() == HTTPReturnPreference.REPRESENTATION
|| historyContext.getReturnPreference() == HTTPReturnPreference.OPERATION_OUTCOME) {
// vread the resources so that we can include them in the response bundle
if (log.isLoggable(Level.FINE)) {
log.fine("Fetching resources for history response bundle, count=" + records.size());
}
resources = persistence.readResourcesForRecords(records);
if (resources.size() != records.size()) {
// very unlikely...unless we overlap with a patient erase operation
throw new FHIRPersistenceException("Could not read all required resource records");
}
}
} catch (FHIRPersistenceDataAccessException x) {
log.log(Level.SEVERE, "Error reading history; params = {" + historyContext + "}", x);
throw x;
} finally {
txn.end();
}
// Create a history bundle and add an entry for each record
Bundle.Builder bundleBuilder = Bundle.builder();
Long changeIdMarker = null;
Instant lastChangeTime = null;
// The records are ordered correctly by the query, so we just need to
// output them in the same order.
for (int i=0; i changeIdMarker) {
// keep track of the greatest change id value when scanning forwards
// using the primary key
changeIdMarker = changeRecord.getChangeId();
}
Request.Builder requestBuilder = Request.builder();
Entry.Response.Builder responseBuilder = Entry.Response.builder();
switch (changeRecord.getChangeType()) {
case CREATE:
requestBuilder.method(changeRecord.getVersionId() > 1 ? HTTPVerb.PUT : HTTPVerb.POST);
requestBuilder.url(Url.of(changeRecord.getResourceTypeName()));
responseBuilder.status("201");
break;
case UPDATE:
requestBuilder.method(HTTPVerb.PUT);
requestBuilder.url(Url.of(changeRecord.getResourceTypeName() + "/" + changeRecord.getLogicalId()));
responseBuilder.status("200");
break;
case DELETE:
requestBuilder.method(HTTPVerb.DELETE);
requestBuilder.url(Url.of(changeRecord.getResourceTypeName() + "/" + changeRecord.getLogicalId()));
responseBuilder.status("200");
break;
}
String fullUrl = getRequestBaseUri(resourceType) + "/" + changeRecord.getResourceTypeName() + "/" + changeRecord.getLogicalId();
responseBuilder.lastModified(com.ibm.fhir.model.type.Instant.of(changeRecord.getChangeTstamp().atZone(UTC)));
responseBuilder.etag("W/\"" + changeRecord.getVersionId() + "\"");
responseBuilder.location(Url.of(fullUrl + "/_history/" + changeRecord.getVersionId()));
// Per the R4 spec, the fullUrl should not contain _history/:vid
Entry.Builder entryBuilder = Entry.builder();
entryBuilder.id(Long.toString(changeRecord.getChangeId()));
entryBuilder.fullUrl(Url.of(fullUrl));
entryBuilder.request(requestBuilder.build());
entryBuilder.response(responseBuilder.build());
// history bundle entry should not include any resource for deleted entries,
// also resource may be null if returnPreference=minimal
if (changeRecord.getChangeType() != ChangeType.DELETE && resource != null) {
entryBuilder.resource(resource);
}
bundleBuilder.entry(entryBuilder.build());
}
// Get the service base address to use for next and self links
String serviceBase = ReferenceUtil.getBaseUrl(null);
if (serviceBase.endsWith("/")) {
serviceBase = serviceBase.substring(0, serviceBase.length()-1);
}
if (changeIdMarker != null || lastChangeTime != null) {
// post the next link which a client can use to get the next set of changes.
// If this link is not included, the client can assume we've reached the end.
StringBuilder nextRequest = new StringBuilder();
nextRequest.append(serviceBase);
if (resourceType != null) {
// note that the serviceBase includes /_history for whole system history,
// but not for the resourceType/ whole history interaction
nextRequest.append("/").append(resourceType).append("/_history");
}
nextRequest.append("?");
nextRequest.append("_count=").append(count);
if (resourceType == null && historyContext.getResourceTypes().size() > 0) {
nextRequest.append("&_type=");
nextRequest.append(String.join(",", historyContext.getResourceTypes()));
}
if (historyContext.isExcludeTransactionTimeoutWindow()) {
nextRequest.append("&_excludeTransactionTimeoutWindow=true");
}
switch (historyContext.getHistorySortOrder()) {
case ASC_LAST_UPDATED:
nextRequest.append("&_sort=" + HistorySortOrder.ASC_LAST_UPDATED.toString());
nextRequest.append("&_since=").append(lastChangeTime.atZone(UTC).format(DateTime.PARSER_FORMATTER));
if (historyContext.getBefore() != null && historyContext.getBefore().getValue() != null) {
// make sure we keep including the before filter specified in the original request
nextRequest.append("&_before=").append(historyContext.getBefore().getValue().format(DateTime.PARSER_FORMATTER));
}
if (changeIdMarker != null) {
// good way to exclude this resource on the next call
nextRequest.append("&_changeIdMarker=").append(changeIdMarker);
}
break;
case DESC_LAST_UPDATED:
nextRequest.append("&_sort=" + HistorySortOrder.DESC_LAST_UPDATED.toString());
nextRequest.append("&_before=").append(lastChangeTime.atZone(UTC).format(DateTime.PARSER_FORMATTER));
if (historyContext.getSince() != null && historyContext.getSince().getValue() != null) {
// make sure we keep including the since filter specified in the original request
nextRequest.append("&_since=").append(historyContext.getSince().getValue().format(DateTime.PARSER_FORMATTER));
}
if (changeIdMarker != null) {
// good way to exclude this resource on the next call
nextRequest.append("&_changeIdMarker=").append(changeIdMarker);
}
break;
case NONE:
nextRequest.append("&_sort=" + HistorySortOrder.NONE.toString());
nextRequest.append("&_changeIdMarker=").append(changeIdMarker);
// since/before range filters should not be common when using system-defined
// sort order (HistorySortOrder.NONE) but are supported. Note the before
// value will interact with _excludeTransactionTimeoutWindow
if (historyContext.getSince() != null && historyContext.getSince().getValue() != null) {
nextRequest.append("&_since=").append(historyContext.getSince().getValue().format(DateTime.PARSER_FORMATTER));
}
if (historyContext.getBefore() != null && historyContext.getBefore().getValue() != null) {
nextRequest.append("&_before=").append(historyContext.getBefore().getValue().format(DateTime.PARSER_FORMATTER));
}
break;
}
Bundle.Link.Builder linkBuilder = Bundle.Link.builder();
linkBuilder.url(Uri.of(nextRequest.toString()));
linkBuilder.relation(com.ibm.fhir.model.type.String.of("next"));
bundleBuilder.link(linkBuilder.build());
}
// Add a self link
StringBuilder selfRequest = new StringBuilder();
selfRequest.append(serviceBase);
if (resourceType != null) {
selfRequest.append("/").append(resourceType);
}
selfRequest.append("?");
selfRequest.append("_count=").append(count);
if (historyContext.getChangeIdMarker() != null) {
selfRequest.append("&_changeIdMarker=").append(historyContext.getChangeIdMarker());
}
if (historyContext.getSince() != null && historyContext.getSince().getValue() != null) {
selfRequest.append("&_since=").append(historyContext.getSince().getValue().format(DateTime.PARSER_FORMATTER));
}
if (historyContext.getBefore() != null && historyContext.getBefore().getValue() != null) {
selfRequest.append("&_before=").append(historyContext.getBefore().getValue().format(DateTime.PARSER_FORMATTER));
}
if (resourceType == null && historyContext.getResourceTypes().size() > 0) {
selfRequest.append("&_type=");
selfRequest.append(String.join(",", historyContext.getResourceTypes()));
}
if (historyContext.isExcludeTransactionTimeoutWindow()) {
selfRequest.append("&_excludeTransactionTimeoutWindow=true");
}
switch (historyContext.getHistorySortOrder()) {
case ASC_LAST_UPDATED:
selfRequest.append("&_sort=" + HistorySortOrder.ASC_LAST_UPDATED.toString());
break;
case DESC_LAST_UPDATED:
selfRequest.append("&_sort=" + HistorySortOrder.DESC_LAST_UPDATED.toString());
break;
case NONE:
selfRequest.append("&_sort=" + HistorySortOrder.NONE.toString());
break;
}
Bundle.Link.Builder linkBuilder = Bundle.Link.builder();
linkBuilder.url(Uri.of(selfRequest.toString()));
linkBuilder.relation(com.ibm.fhir.model.type.String.of("self"));
bundleBuilder.link(linkBuilder.build());
bundleBuilder.type(BundleType.HISTORY);
Bundle bundle = bundleBuilder.build();
// Invoke the 'afterHistory' interceptor methods.
event.setFhirResource(bundle);
getInterceptorMgr().fireAfterHistoryEvent(event);
return bundle;
}
@Override
public ResourceEraseRecord doErase(FHIROperationContext operationContext, EraseDTO eraseDto) throws FHIROperationException {
// @implNote doReindex has a nice pattern to handle some retries in case of deadlock exceptions
final int TX_ATTEMPTS = 5;
int attempt = 1;
ResourceEraseRecord eraseRecord = new ResourceEraseRecord();
do {
FHIRTransactionHelper txn = null;
try {
txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
eraseRecord = persistence.erase(eraseDto);
attempt = TX_ATTEMPTS; // end the retry loop
} catch (FHIRPersistenceDataAccessException x) {
if (x.isTransactionRetryable() && attempt < TX_ATTEMPTS) {
log.info("attempt #" + attempt + " failed, retrying transaction");
} else {
throw new FHIROperationException("Error during $erase", x);
}
} catch (Exception x) {
attempt = TX_ATTEMPTS; // end the retry loop
throw new FHIROperationException("Error during $erase", x);
} finally {
if (txn != null) {
txn.end();
}
}
} while (attempt++ < TX_ATTEMPTS);
return eraseRecord;
}
@Override
public List doRetrieveIndex(FHIROperationContext operationContext, String resourceTypeName, int count, Instant notModifiedAfter, Long afterIndexId) throws Exception {
List indexIds = null;
FHIRTransactionHelper txn = null;
try {
txn = new FHIRTransactionHelper(getTransaction());
txn.begin();
indexIds = persistence.retrieveIndex(count, notModifiedAfter, afterIndexId, resourceTypeName);
} finally {
if (txn != null) {
txn.end();
}
}
return indexIds;
}
@Override
public String generateResourceId() {
return persistence.generateResourceId();
}
/**
* Get the current time which can be used for the lastUpdated field
* @return current time in UTC
*/
protected com.ibm.fhir.model.type.Instant getCurrentInstant() {
return FHIRPersistenceSupport.getCurrentInstant();
}
@Override
public PayloadPersistenceResponse storePayload(Resource resource, String logicalId, int newVersionNumber, String resourcePayloadKey) throws Exception {
// Delegate to the persistence layer. Result will be null if offloading is not supported
return persistence.storePayload(resource, logicalId, newVersionNumber, resourcePayloadKey);
}
}
