| /* |
| * 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 WARRANTIES OR 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.karaf.jpa.hibernate.impl; |
| |
| import java.lang.reflect.Proxy; |
| |
| import javax.management.MBeanServer; |
| import javax.management.MalformedObjectNameException; |
| import javax.management.ObjectName; |
| import javax.persistence.EntityManager; |
| import javax.persistence.EntityManagerFactory; |
| |
| import org.apache.karaf.jpa.hibernate.StatisticsMXBean; |
| import org.hibernate.Session; |
| import org.hibernate.SessionFactory; |
| import org.hibernate.stat.Statistics; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.util.tracker.ServiceTracker; |
| import org.osgi.util.tracker.ServiceTrackerCustomizer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Track EntityManagerFactory services for the persistence units. |
| * Manage on StatisticsMXBean for each persistence unit named like: |
| * org.hibernate.statistics:unitName=<name of persistence unit> |
| */ |
| public class StatisticsPublisher implements ServiceTrackerCustomizer<EntityManagerFactory, EntityManagerFactory> { |
| private static Logger LOG = LoggerFactory.getLogger(StatisticsPublisher.class); |
| private BundleContext context; |
| private MBeanServer mbeanServer; |
| private ServiceTracker<EntityManagerFactory, EntityManagerFactory> emfTracker; |
| |
| public StatisticsPublisher(BundleContext context, MBeanServer mbeanServer) { |
| this.context = context; |
| this.mbeanServer = mbeanServer; |
| this.emfTracker = new ServiceTracker<>(context, EntityManagerFactory.class, this); |
| } |
| |
| public void start() { |
| this.emfTracker.open(true); |
| } |
| |
| public void stop() { |
| ServiceReference<EntityManagerFactory>[] emfRefs = this.emfTracker.getServiceReferences(); |
| for (ServiceReference<EntityManagerFactory> emfRef : emfRefs) { |
| try { |
| this.mbeanServer.unregisterMBean(getOName(emfRef)); |
| } catch (Exception e) { |
| } |
| } |
| this.emfTracker.close(); |
| } |
| |
| ObjectName getOName(ServiceReference<EntityManagerFactory> reference) { |
| try { |
| String unitName = (String)reference.getProperty("osgi.unit.name"); |
| return new ObjectName("org.hibernate.statistics", "unitName", unitName); |
| } catch (MalformedObjectNameException e) { |
| throw new RuntimeException(e.getMessage(), e); |
| } |
| } |
| |
| private void publishStatistics(ServiceReference<EntityManagerFactory> reference, EntityManagerFactory emf) { |
| String persitenceProvider = (String)reference.getProperty("osgi.unit.provider"); |
| if (!"org.hibernate.ejb.HibernatePersistence".equals(persitenceProvider)) { |
| return; |
| } |
| if (reference.getProperty("org.apache.aries.jpa.proxy.factory") != null) { |
| return; |
| } |
| try { |
| EntityManager em = emf.createEntityManager(); |
| SessionFactory sessionFactory = em.unwrap(Session.class).getSessionFactory(); |
| final Statistics statistics = sessionFactory.getStatistics(); |
| statistics.setStatisticsEnabled(true); |
| mbeanServer.registerMBean(getStatisticsMBean(statistics), getOName(reference)); |
| } catch (Exception e) { |
| LOG.warn("Error publishing StatisticsMXBean" + e.getMessage(), e); |
| } |
| } |
| |
| @Override |
| public EntityManagerFactory addingService(ServiceReference<EntityManagerFactory> reference) { |
| EntityManagerFactory emf = context.getService(reference); |
| publishStatistics(reference, emf); |
| return emf; |
| } |
| |
| private Object getStatisticsMBean(final Statistics statistics) { |
| return Proxy.newProxyInstance(getClass().getClassLoader(), new Class<?>[] { StatisticsMXBean.class }, |
| (proxy, method, args) -> method.invoke(statistics, args)); |
| } |
| |
| @Override |
| public void modifiedService(ServiceReference<EntityManagerFactory> reference, EntityManagerFactory service) { |
| } |
| |
| @Override |
| public void removedService(ServiceReference<EntityManagerFactory> reference, EntityManagerFactory service) { |
| try { |
| mbeanServer.unregisterMBean(getOName(reference)); |
| } catch (Exception e) { |
| // Ignore |
| } |
| } |
| } |