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Micro Distribution of the Payara Project for IBM JDK
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// Portions Copyright [2016-2017] [Payara Foundation and/or its affiliates]
package org.glassfish.persistence.jpa;
import com.sun.appserv.connectors.internal.api.ConnectorRuntime;
import com.sun.enterprise.deployment.*;
import com.sun.enterprise.deployment.util.DOLUtils;
import com.sun.enterprise.module.bootstrap.StartupContext;
import com.sun.enterprise.util.ExceptionUtil;
import com.sun.logging.LogDomains;
import org.glassfish.api.deployment.DeployCommandParameters;
import org.glassfish.api.event.EventListener;
import org.glassfish.api.event.Events;
import org.glassfish.deployment.common.RootDeploymentDescriptor;
import org.glassfish.internal.data.ApplicationInfo;
import org.glassfish.internal.data.ApplicationRegistry;
import org.glassfish.internal.deployment.Deployment;
import org.glassfish.internal.deployment.ExtendedDeploymentContext;
import org.glassfish.server.ServerEnvironmentImpl;
import org.glassfish.api.deployment.DeploymentContext;
import org.glassfish.api.deployment.MetaData;
import org.glassfish.api.deployment.OpsParams;
import org.glassfish.deployment.common.SimpleDeployer;
import org.glassfish.deployment.common.DeploymentException;
import org.glassfish.persistence.common.Java2DBProcessorHelper;
import javax.inject.Inject;
import org.jvnet.hk2.annotations.Service;
import org.glassfish.hk2.api.PostConstruct;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceException;
import java.io.IOException;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Deployer for JPA applications
* @author Mitesh Meswani
*/
@Service
public class JPADeployer extends SimpleDeployer implements PostConstruct, EventListener {
@Inject
private ConnectorRuntime connectorRuntime;
@Inject
private ServerEnvironmentImpl serverEnvironment;
@Inject
private volatile StartupContext sc = null;
@Inject
private Events events;
@Inject
private ApplicationRegistry applicationRegistry;
private static Logger logger = LogDomains.getLogger(PersistenceUnitLoader.class, LogDomains.PERSISTENCE_LOGGER + ".jpadeployer");
/** Key used to get/put emflists in transientAppMetadata */
private static final String EMF_KEY = EntityManagerFactory.class.toString();
@Override public MetaData getMetaData() {
return new MetaData(true /*invalidateCL */ ,
null /* provides */,
new Class[] {Application.class} /* requires Application from dol */);
}
protected void generateArtifacts(DeploymentContext dc) throws DeploymentException {
// Noting to generate yet!!
}
protected void cleanArtifacts(DeploymentContext dc) throws DeploymentException {
// Drop tables if needed on undeploy.
OpsParams params = dc.getCommandParameters(OpsParams.class);
if (params.origin.isUndeploy() && isDas()) {
boolean hasScopedResource = false;
String appName = params.name();
ApplicationInfo appInfo = applicationRegistry.get(appName);
Application application = appInfo.getMetaData(Application.class);
Set bundles = application.getBundleDescriptors();
// Iterate through all the bundles of the app and collect pu references in referencedPus
for (BundleDescriptor bundle : bundles) {
Collection pusReferencedFromBundle = bundle.findReferencedPUs();
for(PersistenceUnitDescriptor pud : pusReferencedFromBundle) {
hasScopedResource = hasScopedResource(pud);
if(hasScopedResource) {
break;
}
}
}
// if there are scoped resources, deploy them so that they are accessible for Java2DB to
// delete tables.
if(hasScopedResource){
connectorRuntime.registerDataSourceDefinitions(application);
}
Java2DBProcessorHelper helper = new Java2DBProcessorHelper(dc);
helper.init();
helper.createOrDropTablesInDB(false, "JPA"); // NOI18N
//if there are scoped resources, undeploy them.
if(hasScopedResource){
connectorRuntime.unRegisterDataSourceDefinitions(application);
}
}
}
/**
* @inheritDoc
*/
public V loadMetaData(Class type, DeploymentContext context) {
return null;
}
/**
* EMFs for refered pus are created and stored in JPAApplication instance.
* The JPAApplication instance is stored in given DeploymentContext to be retrieved by load
*/
@Override public boolean prepare(DeploymentContext context) {
boolean prepared = super.prepare(context);
if(prepared) {
if(isEMFCreationRequired(context)) {
createEMFs(context);
}
}
return prepared;
}
/**
* CreateEMFs and save them in persistence
* @param context
*/
private void createEMFs(DeploymentContext context) {
Application application = context.getModuleMetaData(Application.class);
Set bundles = application.getBundleDescriptors();
// Iterate through all the bundles for the app and collect pu references in referencedPus
boolean hasScopedResource = false;
final List referencedPus = new ArrayList();
for (BundleDescriptor bundle : bundles) {
Collection pusReferencedFromBundle = bundle.findReferencedPUs();
for(PersistenceUnitDescriptor pud : pusReferencedFromBundle) {
referencedPus.add(pud);
if( hasScopedResource(pud) ) {
hasScopedResource = true;
}
}
}
if (hasScopedResource) {
// Scoped resources are registered by connector runtime after prepare(). That is too late for JPA
// This is a hack to initialize connectorRuntime for scoped resources
connectorRuntime.registerDataSourceDefinitions(application);
}
//Iterate through all the PUDs for this bundle and if it is referenced, load the corresponding pu
PersistenceUnitDescriptorIterator pudIterator = new PersistenceUnitDescriptorIterator() {
@Override void visitPUD(PersistenceUnitDescriptor pud, DeploymentContext context) {
if(referencedPus.contains(pud)) {
boolean isDas = isDas();
// While running in embedded mode, it is not possible to guarantee that entity classes are not loaded by the app classloader before transformers are installed
// If that happens, weaving will not take place and EclipseLink will throw up. Provide users an option to disable weaving by passing the flag.
// Note that we enable weaving if not explicitly disabled by user
boolean weavingEnabled = Boolean.valueOf(sc.getArguments().getProperty("org.glassfish.persistence.embedded.weaving.enabled", "true"));
ProviderContainerContractInfo providerContainerContractInfo = weavingEnabled ?
new ServerProviderContainerContractInfo(context, connectorRuntime, isDas) :
new EmbeddedProviderContainerContractInfo(context, connectorRuntime, isDas);
try {
((ExtendedDeploymentContext) context).prepareScratchDirs();
} catch (IOException e) {
// There is no way to recover if we are not able to create the scratch dirs. Just rethrow the exception.
throw new RuntimeException(e);
}
try {
PersistenceUnitLoader puLoader = new PersistenceUnitLoader(pud, providerContainerContractInfo);
// Store the puLoader in context. It is retrieved to execute java2db and to
// store the loaded emfs in a JPAApplicationContainer object for cleanup
context.addTransientAppMetaData(getUniquePuIdentifier(pud), puLoader);
} catch (Exception e) {
DeployCommandParameters dcp = context.getCommandParameters(DeployCommandParameters.class);
if (dcp.isSkipDSFailure() && ExceptionUtil.isDSFailure(e)) {
logger.log(Level.WARNING, "Resource communication failure exception skipped while loading the pu " + pud.getName(), e);
} else {
throw e;
}
}
}
}
};
pudIterator.iteratePUDs(context);
}
/**
* @return true if given pud is using scoped resource
*/
private boolean hasScopedResource(PersistenceUnitDescriptor pud) {
boolean hasScopedResource = false;
String jtaDataSource = pud.getJtaDataSource();
if(jtaDataSource != null && jtaDataSource.startsWith("java:")){
hasScopedResource = true;
}
return hasScopedResource;
}
/**
* @param context
* @return true if emf creation is required false otherwise
*/
private boolean isEMFCreationRequired(DeploymentContext context) {
/*
Here are various use cases that needs to be handled.
This method handles EMF creation part, APPLICATION_PREPARED event handle handles java2db and closing of emf
To summarize,
-Unconditionally create EMFs on DAS for java2db if it is deploy. We will close this EMF in APPLICATION_PREPARED after java2db if (target!= DAS || enable=false)
-We will not create EMFs on instance if application is not enabled
------------------------------------------------------------------------------------
Scenario Expected Behavior
------------------------------------------------------------------------------------
deploy --target=server --enabled=true. DAS(EMF created, java2db, EMF remains open)
-restart DAS(EMF created, EMF remains open)
-undeploy DAS(EMF closed. Drop tables)
-create-application-ref instance1 DAS(No action)
INSTANCE1(EMF created)
deploy --target=server --enabled=false. DAS(EMF created,java2db, EMF closed in APPLICATION_PREPARED)
-restart DAS(No EMF created)
-undeploy DAS(No EMF to close, Drop tables)
-enable DAS(EMF created)
-undelpoy DAS(EMF closed, Drop tables)
-create-application-ref instance1 DAS(No action)
INSTANCE1(EMF created)
deploy --target=instance1 --enabled=true DAS(EMF created, java2db, EMF closed in APPLICATION_PREPARED)
INSTANCE1(EMF created)
-create-application-ref instance2 INSTANCE2(EMF created)
-restart DAS(No EMF created)
INSTANCE1(EMF created)
INSTANCE2(EMF created)
-undeploy DAS(No EMF to close, Drop tables)
INSTANCE1(EMF closed)
-create-application-ref server DAS(EMF created)
-delete-application-ref server DAS(EMF closed)
undeploy INSTANCE1(EMF closed)
deploy --target=instance --enabled=false. DAS(EMF created, java2db, EMF closed in APPLICATION_PREPARED)
INSTANCE1(No EMF created)
-create-application-ref instance2 DAS(No action)
INSTANCE2(No Action)
-restart DAS(No EMF created)
INSTANCE1(No EMF created)
INSTANCE2(No EMF created)
-undeploy DAS(No EMF to close, Drop tables)
INSTANCE1(No EMF to close)
INSTANCE2(No EMF to close)
-enable --target=instance1 DAS(No EMF created)
INSTANCE1(EMF created)
*/
boolean createEMFs = false;
DeployCommandParameters deployCommandParameters = context.getCommandParameters(DeployCommandParameters.class);
boolean deploy = deployCommandParameters.origin.isDeploy();
boolean enabled = deployCommandParameters.enabled;
boolean isDas = isDas();
if(logger.isLoggable(Level.FINER)) {
logger.finer("isEMFCreationRequired(): deploy: " + deploy + " enabled: " + enabled + " isDas: " + isDas);
}
if(isDas) {
if(deploy) {
createEMFs = true; // Always create emfs on DAS while deploying to take care of java2db and PU validation on deploy
} else {
//We reach here for (!deploy && das) => server restart or enabling a disabled app on DAS
boolean isTargetDas = isTargetDas(deployCommandParameters);
if(logger.isLoggable(Level.FINER)) {
logger.finer("isEMFCreationRequired(): isTargetDas: " + isTargetDas);
}
if(enabled && isTargetDas) {
createEMFs = true;
}
}
} else { //!das => on an instance
if(enabled) {
createEMFs = true;
}
}
if(logger.isLoggable(Level.FINER)) {
logger.finer("isEMFCreationRequired(): returning createEMFs:" + createEMFs);
}
return createEMFs;
}
private static boolean isTargetDas(DeployCommandParameters deployCommandParameters) {
return "server".equals(deployCommandParameters.target); // TODO discuss with Hong. This comparison should be encapsulated somewhere
}
/**
* @inheritDoc
*/
//@Override
public JPApplicationContainer load(JPAContainer container, DeploymentContext context) {
return new JPApplicationContainer();
}
/**
* Returns unique identifier for this pu within application
* @param pud The given pu
* @return Absolute pu root + pu name
*/
private static String getUniquePuIdentifier(PersistenceUnitDescriptor pud) {
return pud.getAbsolutePuRoot() + pud.getName();
}
private boolean isDas() {
return serverEnvironment.isDas() || serverEnvironment.isEmbedded();
}
@Override
public void postConstruct() {
events.register(this);
}
@Override
public void event(Event event) {
if(logger.isLoggable(Level.FINEST)) {
logger.finest("JpaDeployer.event():" + event.name());
}
if (event.is(Deployment.APPLICATION_PREPARED) ) {
ExtendedDeploymentContext context = (ExtendedDeploymentContext)event.hook();
DeployCommandParameters deployCommandParameters = context.getCommandParameters(DeployCommandParameters.class);
if(logger.isLoggable(Level.FINE)) {
logger.fine("JpaDeployer.event(): Handling APPLICATION_PREPARED origin is:" + deployCommandParameters.origin);
}
// When create-application-ref is called for an already deployed app, APPLICATION_PREPARED will be sent on DAS
// Obviously there is no new emf created for this event and we need not do java2db also. Ignore the event
// However, if target for create-application-ref is DAS => the app was deployed on other instance but now
// an application-ref is being created on DAS. Process the app
if(!deployCommandParameters.origin.isCreateAppRef() || isTargetDas(deployCommandParameters)) {
Map deploymentContexts = context.getModuleDeploymentContexts();
for (DeploymentContext deploymentContext : deploymentContexts.values()) {
//bundle level pus
iterateInitializedPUsAtApplicationPrepare(deploymentContext);
}
//app level pus
iterateInitializedPUsAtApplicationPrepare(context);
}
} else if(event.is(Deployment.APPLICATION_DISABLED)) {
logger.fine("JpaDeployer.event(): APPLICATION_DISABLED");
// APPLICATION_DISABLED will be generated when an app is disabled/undeployed/appserver goes down.
//close all the emfs created for this app
ApplicationInfo appInfo = (ApplicationInfo) event.hook();
closeEMFs(appInfo);
}
}
private void closeEMFs(ApplicationInfo appInfo) {
//Suppress warning required as there is no way to pass equivalent of List.class to the method
@SuppressWarnings("unchecked") List emfsCreatedForThisApp = appInfo.getTransientAppMetaData(EMF_KEY, List.class);
if(emfsCreatedForThisApp != null) { // Events are always dispatched to all registered listeners. emfsCreatedForThisApp will be null for an app that does not have PUs.
for (EntityManagerFactory entityManagerFactory : emfsCreatedForThisApp) {
entityManagerFactory.close();
}
// We no longer have the emfs in open state clear the list.
// On app enable(after a disable), for a cluster, the deployment framework calls prepare() for instances but not for DAS.
// So on DAS, at a disable, the emfs will be closed and we will not attempt to close emfs when appserver goes down even if the app is re-enabled.
emfsCreatedForThisApp.clear();
}
}
/**
* Does java2db on DAS and saves emfs created during prepare to ApplicationInfo maintained by DOL.
* ApplicationInfo is not available during prepare() so we can not directly use it there.
* @param context
*/
private void iterateInitializedPUsAtApplicationPrepare(final DeploymentContext context) {
final DeployCommandParameters deployCommandParameters = context.getCommandParameters(DeployCommandParameters.class);
String appName = deployCommandParameters.name;
final ApplicationInfo appInfo = applicationRegistry.get(appName);
//iterate through all the PersistenceUnitDescriptor for this bundle.
PersistenceUnitDescriptorIterator pudIterator = new PersistenceUnitDescriptorIterator() {
@Override void visitPUD(PersistenceUnitDescriptor pud, DeploymentContext context) {
//PersistenceUnitsDescriptor corresponds to persistence.xml. A bundle can only have one persitence.xml except
// when the bundle is an application which can have multiple persitence.xml under jars in root of ear and lib.
PersistenceUnitLoader puLoader = context.getTransientAppMetaData(getUniquePuIdentifier(pud), PersistenceUnitLoader.class);
if (puLoader != null) { // We have initialized PU
boolean saveEMF = true;
if(isDas()) { //We do validation and execute Java2DB only on DAS
if(deployCommandParameters.origin.isDeploy()) { //APPLICATION_PREPARED will be called for create-application-ref also. We should perform java2db only on first deploy
//Create EM to trigger validation on PU
EntityManagerFactory emf = puLoader.getEMF();
EntityManager em = null;
try {
// Create EM to trigger any validations that are lazily performed by the provider
// EM creation also triggers DDL generation by provider.
em = emf.createEntityManager();
} catch (PersistenceException e) {
// Exception indicates something went wrong while performing validation. Clean up and rethrow to fail deployment
emf.close();
throw new DeploymentException(e); // Need to wrap exception in DeploymentException else deployment will not fail !!
} finally {
if (em != null) {
em.close();
}
}
puLoader.doJava2DB();
boolean enabled = deployCommandParameters.enabled;
boolean isTargetDas = isTargetDas(deployCommandParameters);
if(logger.isLoggable(Level.FINER)) {
logger.finer("iterateInitializedPUsAtApplicationPrepare(): enabled: " + enabled + " isTargetDas: " + isTargetDas);
}
if(!isTargetDas || !enabled) {
// we are on DAS but target != das or app is not enabled on das => The EMF was just created for Java2Db. Close it.
puLoader.getEMF().close();
saveEMF = false; // Do not save EMF. We have already closed it
}
}
}
if(saveEMF) {
// Save emf in ApplicationInfo so that it can be retrieved and closed for cleanup
@SuppressWarnings("unchecked") //Suppress warning required as there is no way to pass equivalent of List.class to the method
List emfsCreatedForThisApp = appInfo.getTransientAppMetaData(EMF_KEY, List.class );
if(emfsCreatedForThisApp == null) {
//First EMF for this app, initialize
emfsCreatedForThisApp = new ArrayList();
appInfo.addTransientAppMetaData(EMF_KEY, emfsCreatedForThisApp);
}
emfsCreatedForThisApp.add(puLoader.getEMF());
} // if (saveEMF)
} // if(puLoader != null)
}
};
pudIterator.iteratePUDs(context);
}
/**
* Helper class to centralize the code for loop that iterates through all the PersistenceUnitDescriptor for a given DeploymentContext (and hence the corresponding bundle)
*/
private static abstract class PersistenceUnitDescriptorIterator {
/**
* Iterate through all the PersistenceUnitDescriptors for the given context (and hence corresponding bundle) and call visitPUD for each of them
* @param context
*/
void iteratePUDs(DeploymentContext context) {
RootDeploymentDescriptor currentBundle = DOLUtils.getCurrentBundleForContext(context);
if (currentBundle != null) { // it can be null for non-JavaEE type of application deployment. e.g., issue 15869
Collection pusDescriptorForThisBundle = currentBundle.getExtensionsDescriptors(PersistenceUnitsDescriptor.class);
for (PersistenceUnitsDescriptor persistenceUnitsDescriptor : pusDescriptorForThisBundle) {
for (PersistenceUnitDescriptor pud : persistenceUnitsDescriptor.getPersistenceUnitDescriptors()) {
visitPUD(pud, context);
}
}
}
}
/**
* Called for each PersistenceUnitDescriptor visited by this iterator.
*/
abstract void visitPUD(PersistenceUnitDescriptor pud, DeploymentContext context);
}
}
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