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hibernate-orm
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HHH-8646 use ServiceTracker in OsgiServiceUtil

This commit is contained in:
Brett Meyer 2013-10-28 12:40:06 -04:00
parent 2bac8d8cbe
commit e135566c0e
5 changed files with 69 additions and 29 deletions
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1
hibernate-osgi/hibernate-osgi.gradle
View File

@ -24,6 +24,7 @@ dependencies {
// MUST use 4.3.1! 4.3.0 was compiled with "-target jsr14".
// http://blog.osgi.org/2012/10/43-companion-code-for-java-7.html
compile( "org.osgi:org.osgi.core:4.3.1" )
compile( "org.osgi:org.osgi.compendium:4.3.1" )
testCompile( libraries.shrinkwrap_api )
testCompile( libraries.shrinkwrap )

32
hibernate-osgi/src/main/java/org/hibernate/osgi/OsgiJtaPlatform.java
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@ -30,7 +30,6 @@ import org.hibernate.TransactionException;
import org.hibernate.engine.transaction.internal.jta.JtaStatusHelper;
import org.hibernate.engine.transaction.jta.platform.spi.JtaPlatform;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
/**
* Offers the JTA Platform provided by the OSGi container. The Enterprise
@ -55,14 +54,32 @@ public class OsgiJtaPlatform implements JtaPlatform {
@Override
public TransactionManager retrieveTransactionManager() {
final ServiceReference sr = bundleContext.getServiceReference( TransactionManager.class.getName() );
return sr == null ? null : (TransactionManager) bundleContext.getService( sr );
try {
final TransactionManager transactionManager = OsgiServiceUtil.getServiceImpl(
TransactionManager.class, bundleContext );
if (transactionManager == null) {
throw new TransactionException("Cannot retrieve the TransactionManager OSGi service!");
}
return transactionManager;
}
catch (Exception e) {
throw new TransactionException("Cannot retrieve the TransactionManager OSGi service!", e);
}
}
@Override
public UserTransaction retrieveUserTransaction() {
final ServiceReference sr = bundleContext.getServiceReference( UserTransaction.class.getName() );
return sr == null ? null : (UserTransaction) bundleContext.getService( sr );
try {
final UserTransaction userTransaction = OsgiServiceUtil.getServiceImpl(
UserTransaction.class, bundleContext );
if (userTransaction == null) {
throw new TransactionException("Cannot retrieve the UserTransaction OSGi service!");
}
return userTransaction;
}
catch (Exception e) {
throw new TransactionException("Cannot retrieve the UserTransaction OSGi service!", e);
}
}
@Override
@ -73,8 +90,13 @@ public class OsgiJtaPlatform implements JtaPlatform {
@Override
public boolean canRegisterSynchronization() {
try {
return JtaStatusHelper.isActive( retrieveTransactionManager() );
}
catch (Exception e) {
return false;
}
}
@Override
public void registerSynchronization(Synchronization synchronization) {

13
hibernate-osgi/src/main/java/org/hibernate/osgi/OsgiPersistenceProvider.java
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@ -23,6 +23,7 @@
*/
package org.hibernate.osgi;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@ -121,30 +122,30 @@ public class OsgiPersistenceProvider extends HibernatePersistenceProvider {
settings.put( AvailableSettings.JTA_PLATFORM, osgiJtaPlatform );
final List<Integrator> integrators = OsgiServiceUtil.getServiceImpls( Integrator.class, context );
final Integrator[] integrators = OsgiServiceUtil.getServiceImpls( Integrator.class, context );
final IntegratorProvider integratorProvider = new IntegratorProvider() {
@Override
public List<Integrator> getIntegrators() {
return integrators;
return Arrays.asList( integrators );
}
};
settings.put( EntityManagerFactoryBuilderImpl.INTEGRATOR_PROVIDER, integratorProvider );
final List<StrategyRegistrationProvider> strategyRegistrationProviders = OsgiServiceUtil.getServiceImpls(
final StrategyRegistrationProvider[] strategyRegistrationProviders = OsgiServiceUtil.getServiceImpls(
StrategyRegistrationProvider.class, context );
final StrategyRegistrationProviderList strategyRegistrationProviderList = new StrategyRegistrationProviderList() {
@Override
public List<StrategyRegistrationProvider> getStrategyRegistrationProviders() {
return strategyRegistrationProviders;
return Arrays.asList( strategyRegistrationProviders );
}
};
settings.put( EntityManagerFactoryBuilderImpl.STRATEGY_REGISTRATION_PROVIDERS, strategyRegistrationProviderList );
final List<TypeContributor> typeContributors = OsgiServiceUtil.getServiceImpls( TypeContributor.class, context );
final TypeContributor[] typeContributors = OsgiServiceUtil.getServiceImpls( TypeContributor.class, context );
final TypeContributorList typeContributorList = new TypeContributorList() {
@Override
public List<TypeContributor> getTypeContributors() {
return typeContributors;
return Arrays.asList( typeContributors );
}
};
settings.put( EntityManagerFactoryBuilderImpl.TYPE_CONTRIBUTORS, typeContributorList );

43
hibernate-osgi/src/main/java/org/hibernate/osgi/OsgiServiceUtil.java
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@ -20,13 +20,11 @@
*/
package org.hibernate.osgi;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.lang.reflect.Array;
import org.jboss.logging.Logger;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.util.tracker.ServiceTracker;
/**
* Utilities for dealing with OSGi environments
@ -37,28 +35,47 @@ public class OsgiServiceUtil {
private static final Logger LOG = Logger.getLogger( OsgiServiceUtil.class );
/**
* Locate all implementors of the given service contract in the given OSGi buindle context
* Locate all implementors of the given service contract in the given OSGi buindle context. Utilizes
* {@link ServiceTracker} (best practice, automatically handles a lot of boilerplate and error conditions).
*
* @param contract The service contract for which to locate implementors
* @param context The OSGi bundle context
* @param <T> The Java type of the service to locate
* @param T[] The Java type of the service to locate
*
* @return All know implementors
*/
public static <T> List<T> getServiceImpls(Class<T> contract, BundleContext context) {
final List<T> serviceImpls = new ArrayList<T>();
public static <T> T[] getServiceImpls(Class<T> contract, BundleContext bundleContext) {
final ServiceTracker<T, T> serviceTracker = new ServiceTracker<T, T>( bundleContext, contract, null );
try {
final Collection<ServiceReference<T>> serviceRefs = context.getServiceReferences( contract, null );
for ( ServiceReference<T> serviceRef : serviceRefs ) {
serviceImpls.add( context.getService( serviceRef ) );
T[] services = (T[]) serviceTracker.getServices();
if (services != null) {
return services;
}
}
catch ( Exception e ) {
LOG.warnf( e, "Exception while discovering OSGi service implementations : %s", contract.getName() );
}
return serviceImpls;
return (T[]) Array.newInstance(contract, 0);
}
private OsgiServiceUtil() {
/**
* Locate the single implementor of the given service contract in the given OSGi buindle context. Utilizes
* {@link ServiceTracker#waitForService(long)}
*
* @param contract The service contract for which to locate implementors
* @param context The OSGi bundle context
* @param T[] The Java type of the service to locate
*
* @return All know implementors
*/
public static <T> T getServiceImpl(Class<T> contract, BundleContext bundleContext) {
final ServiceTracker<T, T> serviceTracker = new ServiceTracker<T, T>( bundleContext, contract, null );
try {
return (T) serviceTracker.waitForService( 1000 );
}
catch ( Exception e ) {
LOG.warnf( e, "Exception while discovering OSGi service implementations : %s", contract.getName() );
return null;
}
}
}

7
hibernate-osgi/src/main/java/org/hibernate/osgi/OsgiSessionFactoryService.java
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@ -21,7 +21,6 @@
package org.hibernate.osgi;
import java.util.Collection;
import java.util.List;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.BootstrapServiceRegistryBuilder;
@ -107,18 +106,18 @@ public class OsgiSessionFactoryService implements ServiceFactory {
final BootstrapServiceRegistryBuilder builder = new BootstrapServiceRegistryBuilder();
builder.with( osgiClassLoader );
final List<Integrator> integrators = OsgiServiceUtil.getServiceImpls( Integrator.class, context );
final Integrator[] integrators = OsgiServiceUtil.getServiceImpls( Integrator.class, context );
for ( Integrator integrator : integrators ) {
builder.with( integrator );
}
final List<StrategyRegistrationProvider> strategyRegistrationProviders
final StrategyRegistrationProvider[] strategyRegistrationProviders
= OsgiServiceUtil.getServiceImpls( StrategyRegistrationProvider.class, context );
for ( StrategyRegistrationProvider strategyRegistrationProvider : strategyRegistrationProviders ) {
builder.withStrategySelectors( strategyRegistrationProvider );
}
final List<TypeContributor> typeContributors = OsgiServiceUtil.getServiceImpls( TypeContributor.class, context );
final TypeContributor[] typeContributors = OsgiServiceUtil.getServiceImpls( TypeContributor.class, context );
for ( TypeContributor typeContributor : typeContributors ) {
configuration.registerTypeContributor( typeContributor );
}