org.eclipse.persistence.sessions.factories.XMLSessionConfigLoader Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of eclipselink Show documentation
Show all versions of eclipselink Show documentation
EclipseLink build based upon Git transaction f2b9fc5
/*
* Copyright (c) 1998, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.sessions.factories;
import java.io.File;
import java.net.URL;
import java.util.Map;
import java.util.Vector;
import org.eclipse.persistence.exceptions.SessionLoaderException;
import org.eclipse.persistence.exceptions.ValidationException;
import org.eclipse.persistence.internal.helper.ConversionManager;
import org.eclipse.persistence.internal.localization.ExceptionLocalization;
import org.eclipse.persistence.internal.sessions.factories.PersistenceEntityResolver;
import org.eclipse.persistence.internal.sessions.factories.SessionsFactory;
import org.eclipse.persistence.internal.sessions.factories.XMLSessionConfigProject_11_1_1;
import org.eclipse.persistence.internal.sessions.factories.XMLSessionConfigToplinkProject;
import org.eclipse.persistence.internal.sessions.factories.model.SessionConfigs;
import org.eclipse.persistence.oxm.XMLContext;
import org.eclipse.persistence.oxm.XMLUnmarshaller;
import org.eclipse.persistence.platform.xml.XMLParser;
import org.eclipse.persistence.platform.xml.XMLPlatform;
import org.eclipse.persistence.platform.xml.XMLPlatformFactory;
import org.eclipse.persistence.sessions.Project;
import org.eclipse.persistence.sessions.Session;
import org.w3c.dom.Document;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* Provide a mechanism for loading Session configuration XML files.
* This is used by the SessionManager to define how to find and load a Session from a sessions XML file.
* The sessions XML file is typically deployed in the applications jar (ejb-jar) and named sessions.xml in the /META-INF directory.
* Several loading options are provided,
*
* - resourceName : The resource path and file name to the sessions XML file,
* default is /sessions.xml or /META-INF/sessions.xml. (ensure "/" is used, not "\").
* A file path can also be provided, although a resource is typically used.
*
- shouldLogin : Define if the loaded session should be connected, default true.
*
- shouldRefresh : Define if the loaded session should be refreshed from the file,
* (this old session will be disconnected) default false.
*
- classLoader : Define the class loader that should be used to find the resource.
* This loader will also be used as the loaded session's class loader. This should be the application's class loader.
* Default is the ConversionManager loader, which is thread-based.
*
- shouldCheckClassLoader : Defines if the session will be refreshed from the file if the class loader requesting the load,
* is different than the loaded session's class loader. This can be used to handle re-deployment.
*
*
* @since TopLink 10.1.3
* @author Guy Pelletier
*/
public class XMLSessionConfigLoader {
protected String resourceName;
/** Stores the resource path to provide a better error message if the load fails. */
protected String resourcePath = DEFAULT_RESOURCE_NAME;
/** Stores the name of the Session in the sessions XML file desired to be loaded. */
protected String sessionName = "default";
/** Define if the loaded session should be connected, default true. */
protected boolean shouldLogin = true;
/** Define if the loaded session should be refreshed from the file. */
protected boolean shouldRefresh = false;
/** Define the class loader that should be used to find the resource. */
protected ClassLoader classLoader;
/** Defines if the session will be refreshed from the file if the class loader requesting the load is different than the loaded session's class loader. */
protected boolean shouldCheckClassLoader = false;
/** Stores any exceptions that occurred to provide all the exceptions up front if the load fails. */
protected Vector exceptionStore;
/** Used to store the entity resolver to validate the XML schema when parsing. */
protected PersistenceEntityResolver entityResolver;
public static final String ECLIPSELINK_SESSIONS_SCHEMA = "org/eclipse/persistence/eclipselink_sessions_2.1.xsd";
protected static final String DEFAULT_RESOURCE_NAME = "sessions.xml";
protected static final String DEFAULT_RESOURCE_NAME_IN_META_INF = "META-INF/sessions.xml";
/** Cache the creation and initialization of the Session XML mapping project. */
protected static final Project project = new XMLSessionConfigProject_11_1_1();
/** Cache the creation and initialization of the Session XML mapping project. */
protected static Project getProject() {
return project;
}
/**
* PUBLIC:
* This constructor is used when the file resource named 'sessions.xml' will
* be parsed for configuration.
*/
public XMLSessionConfigLoader() {
this(DEFAULT_RESOURCE_NAME);
}
/**
* PUBLIC:
* This constructor is used when passing in the resource name of the
* configuration file that should be parsed
*/
public XMLSessionConfigLoader(String resourceName) {
this.resourceName = resourceName;
this.exceptionStore = new Vector<>();
this.entityResolver = new PersistenceEntityResolver();
this.classLoader = ConversionManager.getDefaultManager().getLoader();
}
/**
* INTERNAL:
* Will return the the resource name with full path of the resource file.
*/
public String getResourcePath() {
return this.resourcePath;
}
/**
* INTERNAL:
*/
public Vector getExceptionStore() {
return this.exceptionStore;
}
/**
* PUBLIC:
* Returns the resource name we are trying to load.
*/
public String getResourceName() {
return this.resourceName;
}
/**
* PUBLIC:
* Set the resource name we are trying to load.
*/
public void setResourceName(String resourceName) {
this.resourceName = resourceName;
}
/**
* PUBLIC:
* Returns the name of the Session in the sessions XML file desired to be loaded.
*/
public String getSessionName() {
return this.sessionName;
}
/**
* PUBLIC:
* Set the name of the Session in the sessions XML file desired to be loaded.
*/
public void setSessionName(String sessionName) {
this.sessionName = sessionName;
}
/**
* PUBLIC:
* Return if the loaded session should be connected.
*/
public boolean shouldLogin() {
return shouldLogin;
}
/**
* PUBLIC:
* Set if the loaded session should be connected.
*/
public void setShouldLogin(boolean shouldLogin) {
this.shouldLogin = shouldLogin;
}
/**
* PUBLIC:
* Return if the loaded session should be refreshed from the file.
*/
public boolean shouldRefresh() {
return shouldRefresh;
}
/**
* PUBLIC:
* Set if the loaded session should be refreshed from the file.
*/
public void setShouldRefresh(boolean shouldRefresh) {
this.shouldRefresh = shouldRefresh;
}
/**
* PUBLIC:
* Return if the session will be refreshed from the file if the class loader requesting the load is different than the loaded session's class loader.
*/
public boolean shouldCheckClassLoader() {
return shouldCheckClassLoader;
}
/**
* PUBLIC:
* Set if the session will be refreshed from the file if the class loader requesting the load is different than the loaded session's class loader.
*/
public void setShouldCheckClassLoader(boolean shouldCheckClassLoader) {
this.shouldCheckClassLoader = shouldCheckClassLoader;
}
/**
* PUBLIC:
* Return the class loader that should be used to find the resource.
*/
public ClassLoader getClassLoader() {
return classLoader;
}
/**
* PUBLIC:
* Set the class loader that should be used to find the resource.
*/
public void setClassLoader(ClassLoader classLoader) {
this.classLoader = classLoader;
}
/**
* INTERNAL:
* This method instantiates the parser and builds the document based on the
* schema. If the document is loaded without errors, then the configs are
* converted to sessions and stored on the session manager and true is
* returned to indicate success.
*/
public boolean load(SessionManager sessionManager, ClassLoader loader) {
Document document = loadDocument(loader);
if(getExceptionStore().isEmpty()){
if (document.getDocumentElement().getTagName().equals("sessions")) {
return buildSessionConfigs(sessionManager,loader,document,getProject());
}
}else{
//upon this time, we knew this could be either toplink sessions.xml or invalid eclipse session.xml.
if(document.getDocumentElement().getTagName().equals("toplink-sessions")){
return buildSessionConfigs(sessionManager,loader,document,new XMLSessionConfigToplinkProject());
}else{
// Throw the exceptions we encountered
throw SessionLoaderException.finalException(getExceptionStore());
}
}
// 9.0.4 session.xml, return false to indicate we should load with the XMLLoader
return false;
}
private boolean buildSessionConfigs(SessionManager sessionManager, ClassLoader loader,Document document, Project project){
// No errors occurred, unmasrshal the document which will return a
// SessionConfigs containing 0 or more SessionConfigs and send
// them through the factory to create actual Sessions
XMLContext context = new XMLContext(project);
XMLUnmarshaller unmarshaller = context.createUnmarshaller();
SessionConfigs configs = (SessionConfigs)unmarshaller.unmarshal(document);
SessionsFactory factory = new SessionsFactory();
Map sessions = factory.buildSessionConfigs(configs, loader);
for (Map.Entry entry: sessions.entrySet()) {
// Only add the session if missing.
if (!sessionManager.getSessions().containsKey(entry.getKey())) {
sessionManager.addSession(entry.getKey(), entry.getValue());
}
}
return true;
}
/**
* INTERNAL:
* This method is to be used to load config objects for the Mapping Workbench
* only. Do not call this method.
*/
public SessionConfigs loadConfigsForMappingWorkbench(ClassLoader loader) {
return loadConfigsForMappingWorkbench(loader, true);
}
/**
* INTERNAL:
* This method is to be used to load config objects for the Mapping Workbench
* only. Do not call this method.
*/
public SessionConfigs loadConfigsForMappingWorkbench(ClassLoader loader, boolean validate) {
Document document = loadDocument(loader, validate);
if (getExceptionStore().isEmpty()) {
if (document.getDocumentElement().getTagName().equals("sessions")) {
// No errors occurred, unmarshal the document which will return a
// SessionConfigs containing 0 or more SessionConfigs
XMLContext context = new XMLContext(getProject());
XMLUnmarshaller unmarshaller = context.createUnmarshaller();
return (SessionConfigs)unmarshaller.unmarshal(document);
}else{
// 9.0.4 session.xml or invalid xml format.
throw SessionLoaderException.InvalidSessionXML();
}
} else {
if (document.getDocumentElement().getTagName().equals("toplink-sessions")) {
// No errors occurred, unmarshal the document which will return a
// SessionConfigs containing 0 or more SessionConfigs
XMLContext context = new XMLContext(new XMLSessionConfigToplinkProject());
XMLUnmarshaller unmarshaller = context.createUnmarshaller();
return (SessionConfigs)unmarshaller.unmarshal(document);
}else{
// Throw the exceptions we encountered
throw SessionLoaderException.finalException(getExceptionStore());
}
}
}
/**
* INTERNAL:
* Load a session.xml document. The error handler will capture all the
* errors and allow for a document to be returned.
*/
protected Document loadDocument(ClassLoader loader) {
return loadDocument(loader, SessionManager.shouldUseSchemaValidation());
}
/**
* INTERNAL:
* Load a session.xml document. The error handler will capture all the
* errors and allow for a document to be returned.
*/
protected Document loadDocument(ClassLoader loader, boolean validate) {
URL inURL = loader.getResource(this.resourceName);
// Also allow a file reference.
File inFile = new File(this.resourceName);
if (inURL == null) {
// If loading the default resource name and it is not found,
// look in the META-INF directory.
if (this.resourceName.equals(DEFAULT_RESOURCE_NAME)) {
inURL = loader.getResource(DEFAULT_RESOURCE_NAME_IN_META_INF);
}
if ((inURL == null) && (!inFile.exists())) {
throw ValidationException.noSessionsXMLFound(this.resourceName);
}
}
if (inURL == null) {
this.resourcePath = inFile.getAbsolutePath();
} else {
// Stored the loaded resource path, used in exception string if the
// resource is not found or if there are errors in the resource.
this.resourcePath = inURL.getPath();
}
XMLPlatform xmlPlatform = XMLPlatformFactory.getInstance().getXMLPlatform();
XMLParser parser = xmlPlatform.newXMLParser();
if (validate) {
parser.setValidationMode(XMLParser.SCHEMA_VALIDATION);
} else {
parser.setValidationMode(XMLParser.NONVALIDATING);
}
parser.setWhitespacePreserving(false);
parser.setXMLSchema(loader.getResource(ECLIPSELINK_SESSIONS_SCHEMA));
parser.setEntityResolver(this.entityResolver);
parser.setErrorHandler(new XMLSessionConfigLoaderErrorHandler());
if (inURL == null) {
return parser.parse(inFile);
} else {
return parser.parse(inURL);
}
}
/**
* INTERNAL:
* Purpose: Provide a mechanism to swallow all parsing errors
*
* @see ErrorHandler
* @since TopLink 10.1.3
* @author Guy Pelletier
*/
public class XMLSessionConfigLoaderErrorHandler implements ErrorHandler {
@Override
public void warning(SAXParseException e) throws SAXException {
getExceptionStore().add(SessionLoaderException.failedToParseXML(ExceptionLocalization.buildMessage("parsing_warning"), e.getLineNumber(), e.getColumnNumber(), e));
}
@Override
public void error(SAXParseException e) throws SAXException {
getExceptionStore().add(e);
}
@Override
public void fatalError(SAXParseException e) throws SAXException {
getExceptionStore().add(e);
}
}
}