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// Portions Copyright [2016-2021] [Payara Foundation]
package org.glassfish.admin.rest.resources;
import org.glassfish.admin.rest.utils.Util;
import org.glassfish.admin.rest.utils.ProxyImpl;
import jakarta.ws.rs.core.PathSegment;
import jakarta.ws.rs.core.Response;
import jakarta.ws.rs.core.UriBuilder;
import jakarta.ws.rs.core.UriInfo;
import jakarta.ws.rs.core.Context;
import static jakarta.ws.rs.core.Response.Status.*;
import java.net.URL;
import java.util.Properties;
import java.util.TreeMap;
import jakarta.ws.rs.Consumes;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import jakarta.ws.rs.GET;
import jakarta.ws.rs.core.MediaType;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.PathParam;
import com.sun.enterprise.config.serverbeans.Domain;
import com.sun.enterprise.config.serverbeans.Server;
import org.glassfish.admin.rest.adapter.LocatorBridge;
import org.glassfish.admin.rest.results.ActionReportResult;
import org.glassfish.admin.rest.utils.xml.RestActionReporter;
import org.glassfish.external.statistics.Statistic;
import org.glassfish.external.statistics.Stats;
import org.glassfish.flashlight.datatree.TreeNode;
import org.glassfish.flashlight.MonitoringRuntimeDataRegistry;
import static org.glassfish.admin.rest.provider.ProviderUtil.*;
/**
* @author rajeshwar patil
* @author Mitesh Meswani
*/
@Path("/")
@Produces({MediaType.TEXT_HTML, MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML, MediaType.APPLICATION_FORM_URLENCODED})
@Consumes({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML, MediaType.APPLICATION_FORM_URLENCODED})
public class MonitoringResource {
@Context
protected UriInfo uriInfo;
@Context
protected LocatorBridge habitat;
@GET
@Path("domain{path:.*}")
@Produces({MediaType.TEXT_HTML, MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public Response getChildNodes(@PathParam("path")List pathSegments) {
Response.ResponseBuilder responseBuilder = Response.status(OK);
RestActionReporter ar = new RestActionReporter();
ar.setActionDescription("Monitoring Data");
ar.setMessage("");
ar.setSuccess();
String currentInstanceName = System.getProperty("com.sun.aas.instanceName");
boolean isRunningOnDAS = "server".equals(currentInstanceName); //TODO this needs to come from an API. Check with admin team
MonitoringRuntimeDataRegistry monitoringRegistry =habitat.getRemoteLocator().getService(MonitoringRuntimeDataRegistry.class);
TreeNode rootNode = monitoringRegistry.get(currentInstanceName);
//The pathSegments will always contain "domain". Discard it
pathSegments = pathSegments.subList(1, pathSegments.size());
if(!pathSegments.isEmpty()) {
PathSegment lastSegment = pathSegments.get(pathSegments.size() - 1);
if(lastSegment.getPath().isEmpty()) { // if there is a trailing '/' (like monitoring/domain/), a spurious pathSegment is added. Discard it.
pathSegments = pathSegments.subList(0,pathSegments.size() - 1);
}
}
if(!pathSegments.isEmpty() ) {
String firstPathElement = pathSegments.get(0).getPath();
if(firstPathElement.equals(currentInstanceName)) { // Query for current instance. Execute it
//iterate over pathsegments and build a dotted name to look up in monitoring registry
StringBuilder pathInMonitoringRegistry = new StringBuilder();
for(PathSegment pathSegment : pathSegments.subList(1,pathSegments.size()) ) {
if(pathInMonitoringRegistry.length() > 0 ) {
pathInMonitoringRegistry.append('.');
}
pathInMonitoringRegistry.append(pathSegment.getPath().replaceAll("\\.", "\\\\.")); // Need to escape '.' before passing it to monitoring code
}
TreeNode resultNode = pathInMonitoringRegistry.length() > 0 && rootNode != null ?
rootNode.getNode(pathInMonitoringRegistry.toString()) : rootNode;
if (resultNode != null) {
List list = new ArrayList();
if (resultNode.hasChildNodes()) {
list.addAll(resultNode.getEnabledChildNodes());
} else {
list.add(resultNode);
}
constructEntity(list, ar);
responseBuilder.entity(new ActionReportResult(ar));
} else {
//No monitoring data, so nothing to list
responseBuilder.status(NOT_FOUND);
ar.setFailure();
responseBuilder.entity(new ActionReportResult(ar));
}
} else { //firstPathElement != currentInstanceName => A proxy request
if(isRunningOnDAS) { //Attempt to forward to instance if running on Das
//TODO validate that firstPathElement corresponds to a valid server name
Properties proxiedResponse = new MonitoringProxyImpl().proxyRequest(uriInfo, Util.getJerseyClient(),
habitat.getRemoteLocator());
ar.setExtraProperties(proxiedResponse);
responseBuilder.entity(new ActionReportResult(ar));
} else { // Not running on DAS and firstPathElement != currentInstanceName => Reject the request as invalid
return Response.status(FORBIDDEN).build();
}
}
} else { // Called for /monitoring/domain/
List list = new ArrayList();
if (rootNode != null) {
list.add(rootNode); //Add currentInstance to response
}
constructEntity(list, ar);
if(isRunningOnDAS) { // Add links to instances from the cluster
Domain domain = habitat.getRemoteLocator().getService(Domain.class);
Map links = (Map) ar.getExtraProperties().get("childResources");
for (Server s : domain.getServers().getServer()) {
if (!s.getName().equals("server")) {// add all non 'server' instances
links.put(s.getName(), getElementLink(uriInfo, s.getName()));
}
}
}
responseBuilder.entity(new ActionReportResult(ar));
}
return responseBuilder.build();
}
private void constructEntity(List nodeList, RestActionReporter ar) {
Map entity = new TreeMap();
Map links = new TreeMap();
for (TreeNode node : nodeList) {
//process only the leaf nodes, if any
if (!node.hasChildNodes()) {
//getValue() on leaf node will return one of the following -
//Statistic object, String object or the object for primitive type
Object value = node.getValue();
if (value != null) {
try {
if (value instanceof Statistic) {
Statistic statisticObject = (Statistic) value;
entity.put(node.getName(), getStatistic(statisticObject));
} else if (value instanceof Stats) {
Map subMap = new TreeMap();
for (Statistic statistic : ((Stats) value).getStatistics()) {
subMap.put(statistic.getName(), getStatistic(statistic));
}
entity.put(node.getName(), subMap);
} else {
entity.put(node.getName(), jsonValue(value));
}
} catch (Exception exception) {
//log exception message as warning
}
}
} else {
String name = node.getName();
// Grizzly will barf if it sees backslash
name = name.replace("\\.", ".");
links.put(name, getElementLink(uriInfo, name));
}
}
ar.getExtraProperties().put("entity", entity);
ar.getExtraProperties().put("childResources", links);
}
private static class MonitoringProxyImpl extends ProxyImpl {
@Override
public UriBuilder constructTargetURLPath(UriInfo sourceUriInfo, URL responseURLReceivedFromTarget) {
return sourceUriInfo.getBaseUriBuilder().replacePath(responseURLReceivedFromTarget.getFile());
}
@Override
public UriBuilder constructForwardURLPath(UriInfo sourceUriInfo) {
//forward to URL that has same path as source request.
return sourceUriInfo.getAbsolutePathBuilder();
}
@Override
public String extractTargetInstanceName(UriInfo uriInfo) {
return uriInfo.getPathSegments().get(1).getPath(); //pathSegment[0] == "monitoring"
}
}
}
