| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIESOR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.aries.tx.control.jpa.common.impl; |
| |
| import static org.apache.aries.tx.control.jpa.common.impl.AbstractJPAManagedServiceFactory.EMF_BUILDER_TARGET_FILTER; |
| import static org.osgi.framework.Constants.OBJECTCLASS; |
| import static org.osgi.service.jdbc.DataSourceFactory.JDBC_PASSWORD; |
| import static org.osgi.service.jpa.EntityManagerFactoryBuilder.JPA_UNIT_NAME; |
| |
| import java.util.Dictionary; |
| import java.util.Hashtable; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.aries.tx.control.jpa.common.impl.AbstractJPAEntityManagerProvider; |
| import org.apache.aries.tx.control.resource.common.impl.LifecycleAware; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.framework.ServiceRegistration; |
| import org.osgi.service.cm.ConfigurationException; |
| import org.osgi.service.jpa.EntityManagerFactoryBuilder; |
| import org.osgi.service.transaction.control.jpa.JPAEntityManagerProvider; |
| import org.osgi.util.tracker.ServiceTracker; |
| import org.osgi.util.tracker.ServiceTrackerCustomizer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public abstract class AbstractManagedJPAEMFLocator implements LifecycleAware, |
| ServiceTrackerCustomizer<EntityManagerFactoryBuilder, EntityManagerFactoryBuilder> { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(AbstractJPAEntityManagerProvider.class); |
| |
| private final BundleContext context; |
| private final String pid; |
| private final Map<String, Object> jpaProperties; |
| private final Map<String, Object> providerProperties; |
| private final Runnable onClose; |
| private final ServiceTracker<EntityManagerFactoryBuilder, EntityManagerFactoryBuilder> emfBuilderTracker; |
| |
| private final AtomicReference<EntityManagerFactoryBuilder> activeEMFB = new AtomicReference<>(); |
| private final AtomicReference<AbstractJPAEntityManagerProvider> providerObject = new AtomicReference<>(); |
| |
| private final AtomicReference<ServiceRegistration<JPAEntityManagerProvider>> serviceReg = new AtomicReference<>(); |
| |
| public AbstractManagedJPAEMFLocator(BundleContext context, String pid, Map<String, Object> jpaProperties, |
| Map<String, Object> providerProperties, Runnable onClose) throws InvalidSyntaxException, ConfigurationException { |
| this.context = context; |
| this.pid = pid; |
| this.jpaProperties = jpaProperties; |
| this.providerProperties = providerProperties; |
| this.onClose = onClose; |
| |
| String unitName = (String) providerProperties.get(JPA_UNIT_NAME); |
| if (unitName == null) { |
| LOG.error("The configuration {} must specify a persistence unit name", pid); |
| throw new ConfigurationException(JPA_UNIT_NAME, |
| "The configuration must specify a persistence unit name"); |
| } |
| |
| String targetFilter = (String) providerProperties.get(EMF_BUILDER_TARGET_FILTER); |
| if (targetFilter == null) { |
| targetFilter = "(" + JPA_UNIT_NAME + "=" + unitName + ")"; |
| } |
| |
| targetFilter = "(&(" + OBJECTCLASS + "=" + EntityManagerFactoryBuilder.class.getName() + ")" + targetFilter + ")"; |
| |
| this.emfBuilderTracker = new ServiceTracker<>(context, context.createFilter(targetFilter), this); |
| } |
| |
| public void start() { |
| emfBuilderTracker.open(); |
| } |
| |
| public void stop() { |
| emfBuilderTracker.close(); |
| } |
| |
| @Override |
| public EntityManagerFactoryBuilder addingService(ServiceReference<EntityManagerFactoryBuilder> reference) { |
| EntityManagerFactoryBuilder service = context.getService(reference); |
| |
| updateService(reference, service); |
| return service; |
| } |
| |
| private void updateService(ServiceReference<EntityManagerFactoryBuilder> reference, EntityManagerFactoryBuilder service) { |
| boolean setEMFB; |
| synchronized (this) { |
| setEMFB = activeEMFB.compareAndSet(null, service); |
| } |
| |
| if (setEMFB) { |
| AbstractJPAEntityManagerProvider provider = null; |
| try { |
| provider = getResourceProvider(context, service, reference, jpaProperties, providerProperties, onClose); |
| providerObject.set(provider); |
| ServiceRegistration<JPAEntityManagerProvider> reg = context |
| .registerService(JPAEntityManagerProvider.class, provider, getServiceProperties()); |
| if (!serviceReg.compareAndSet(null, reg)) { |
| throw new IllegalStateException("Unable to set the JDBC connection provider registration"); |
| } |
| } catch (Exception e) { |
| LOG.error("An error occurred when creating the resource provider for {}.", pid, e); |
| activeEMFB.compareAndSet(service, null); |
| if(provider != null) { |
| provider.close(); |
| } |
| |
| } |
| } |
| } |
| |
| protected abstract AbstractJPAEntityManagerProvider getResourceProvider(BundleContext context, |
| EntityManagerFactoryBuilder service, ServiceReference<EntityManagerFactoryBuilder> reference, |
| Map<String, Object> jpaProperties, Map<String, Object> providerProperties, Runnable onClose); |
| |
| private Dictionary<String, ?> getServiceProperties() { |
| Hashtable<String, Object> props = new Hashtable<>(); |
| providerProperties.keySet().stream().filter(s -> !JDBC_PASSWORD.equals(s)) |
| .forEach(s -> props.put(s, providerProperties.get(s))); |
| return props; |
| } |
| |
| @Override |
| public void modifiedService(ServiceReference<EntityManagerFactoryBuilder> reference, EntityManagerFactoryBuilder service) { |
| } |
| |
| @Override |
| public void removedService(ServiceReference<EntityManagerFactoryBuilder> reference, EntityManagerFactoryBuilder service) { |
| boolean emfbLeft; |
| ServiceRegistration<JPAEntityManagerProvider> oldReg = null; |
| AbstractJPAEntityManagerProvider toClose = null; |
| synchronized (this) { |
| emfbLeft = activeEMFB.compareAndSet(service, null); |
| if (emfbLeft) { |
| toClose = providerObject.get(); |
| oldReg = serviceReg.getAndSet(null); |
| } |
| } |
| |
| if (oldReg != null) { |
| try { |
| oldReg.unregister(); |
| } catch (IllegalStateException ise) { |
| LOG.debug("An exception occurred when unregistering a service for {}", pid); |
| } |
| } |
| |
| if(toClose != null) { |
| try { |
| toClose.close(); |
| } catch (Exception e) { |
| LOG.debug("An Exception occured when closing the Resource provider for {}", pid, e); |
| } |
| } |
| |
| try { |
| context.ungetService(reference); |
| } catch (IllegalStateException ise) { |
| LOG.debug("An exception occurred when ungetting the service for {}", reference); |
| } |
| |
| if (emfbLeft) { |
| ServiceReference<EntityManagerFactoryBuilder> newEMFBuilderRef = emfBuilderTracker |
| .getServiceReference(); |
| if (newEMFBuilderRef != null) { |
| EntityManagerFactoryBuilder newEMFBuilder = emfBuilderTracker.getService(newEMFBuilderRef); |
| if(newEMFBuilder != null) { |
| updateService(newEMFBuilderRef, newEMFBuilder); |
| } |
| } |
| } |
| } |
| } |