| /* |
| * 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.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import java.util.Dictionary; |
| import java.util.Hashtable; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.concurrent.atomic.AtomicReference; |
| import java.util.function.Function; |
| |
| import javax.persistence.EntityManagerFactory; |
| |
| import org.apache.aries.tx.control.resource.common.impl.LifecycleAware; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.FrameworkUtil; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.framework.ServiceRegistration; |
| import org.osgi.framework.Version; |
| import org.osgi.framework.wiring.BundleWiring; |
| import org.osgi.resource.Capability; |
| 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() { |
| // We track all services because most persistence bundles |
| // do not import the JPA service API! |
| emfBuilderTracker.open(true); |
| } |
| |
| public void stop() { |
| emfBuilderTracker.close(); |
| } |
| |
| @Override |
| public EntityManagerFactoryBuilder addingService(ServiceReference<EntityManagerFactoryBuilder> reference) { |
| EntityManagerFactoryBuilder service; |
| |
| Object o = context.getService(reference); |
| |
| if(o instanceof EntityManagerFactoryBuilder) { |
| service = (EntityManagerFactoryBuilder) o; |
| } else if (o == null) { |
| return null; |
| } else { |
| service = fixClassSpace(o); |
| } |
| |
| if(service != null) { |
| updateService(reference, service); |
| } else { |
| context.ungetService(reference); |
| } |
| return service; |
| } |
| |
| private EntityManagerFactoryBuilder fixClassSpace(Object o) { |
| |
| Method creationMethod; |
| try { |
| Class<?> clz = o.getClass().getClassLoader().loadClass(EntityManagerFactoryBuilder.class.getName()); |
| |
| Version pkgVersion = getJPAServicePkgVersion(clz); |
| |
| if(Version.parseVersion("2").compareTo(pkgVersion) <= 0) { |
| throw new IllegalArgumentException("The JPA Service Package version is too high " + pkgVersion); |
| } |
| |
| creationMethod = clz.getMethod("createEntityManagerFactory", Map.class); |
| |
| if(!EntityManagerFactory.class.equals(creationMethod.getReturnType())) { |
| throw new IllegalArgumentException("The EntityManagerFactoryBuilder service does not share a class space for javax.persistence"); |
| } |
| |
| return (EntityManagerFactoryBuilder) Proxy.newProxyInstance(getClass().getClassLoader(), |
| new Class<?>[] {EntityManagerFactoryBuilder.class}, |
| (p, m, a) -> o.getClass().getMethod(m.getName(), m.getParameterTypes()).invoke(o, a)); |
| |
| } catch (Exception e) { |
| LOG.error("The located EntityManagerFactoryBuilder service {} cannot be made compatible", o, e); |
| return null; |
| } |
| } |
| |
| protected Version getJPAServicePkgVersion(Class<?> clz) { |
| Function<List<? extends Capability>, Optional<Version>> capMapper = caps -> caps.stream() |
| .map(Capability::getAttributes) |
| .filter(m -> "org.osgi.service.jpa".equals(m.get("osgi.wiring.package"))) |
| .map(m -> (Version) m.get("version")) |
| .findFirst(); |
| |
| return Optional.ofNullable(FrameworkUtil.getBundle(clz)) |
| .map(b -> b.adapt(BundleWiring.class)) |
| .map(bw -> bw.getCapabilities("osgi.wiring.package")) |
| .flatMap(capMapper) |
| .orElse(Version.emptyVersion); |
| } |
| |
| 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); |
| } |
| } |
| } |
| } |
| } |