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/*
 * 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.activemq.jms.pool;

import java.io.IOException;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.XAConnection;
import javax.jms.XAConnectionFactory;
import javax.jms.XASession;
import javax.transaction.SystemException;
import javax.transaction.TransactionManager;

import javax.transaction.xa.XAResource;
import org.apache.geronimo.transaction.manager.NamedXAResourceFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.geronimo.transaction.manager.RecoverableTransactionManager;
import org.apache.geronimo.transaction.manager.NamedXAResource;
import org.apache.geronimo.transaction.manager.WrapperNamedXAResource;


/**
 * This class allows wiring the ActiveMQ broker and the Geronimo transaction manager
 * in a way that will allow the transaction manager to correctly recover XA transactions.
 *
 * For example, it can be used the following way:
 * 
 *   
 *      
 *   
 *
 *   
 *       
 *       
 *       
 *       
 *   
 *
 *   
 *         
 *         
 *         
 *   
 * 
*/ public class GenericResourceManager { private static final Logger LOGGER = LoggerFactory.getLogger(GenericResourceManager.class); private String resourceName; private String userName; private String password; private TransactionManager transactionManager; private ConnectionFactory connectionFactory; public void recoverResource() { try { if (!Recovery.recover(this)) { LOGGER.info("Resource manager is unrecoverable"); } } catch (NoClassDefFoundError e) { LOGGER.info("Resource manager is unrecoverable due to missing classes: " + e); } catch (Throwable e) { LOGGER.warn("Error while recovering resource manager", e); } } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getResourceName() { return resourceName; } public void setResourceName(String resourceName) { this.resourceName = resourceName; } public TransactionManager getTransactionManager() { return transactionManager; } public void setTransactionManager(TransactionManager transactionManager) { this.transactionManager = transactionManager; } public ConnectionFactory getConnectionFactory() { return connectionFactory; } public void setConnectionFactory(ConnectionFactory connectionFactory) { this.connectionFactory = connectionFactory; } /** * This class will ensure the broker is properly recovered when wired with * the Geronimo transaction manager. */ public static class Recovery { public static boolean isRecoverable(GenericResourceManager rm) { return rm.getConnectionFactory() instanceof XAConnectionFactory && rm.getTransactionManager() instanceof RecoverableTransactionManager && rm.getResourceName() != null && !"".equals(rm.getResourceName()); } public static boolean recover(final GenericResourceManager rm) throws IOException { if (isRecoverable(rm)) { final XAConnectionFactory connFactory = (XAConnectionFactory) rm.getConnectionFactory(); RecoverableTransactionManager rtxManager = (RecoverableTransactionManager) rm.getTransactionManager(); rtxManager.registerNamedXAResourceFactory(new NamedXAResourceFactory() { @Override public String getName() { return rm.getResourceName(); } @Override public NamedXAResource getNamedXAResource() throws SystemException { try { final XAConnection xaConnection; if (rm.getUserName() != null && rm.getPassword() != null) { xaConnection = connFactory.createXAConnection(rm.getUserName(), rm.getPassword()); } else { xaConnection = connFactory.createXAConnection(); } final XASession session = xaConnection.createXASession(); xaConnection.start(); LOGGER.debug("new namedXAResource's connection: " + xaConnection); return new ConnectionAndWrapperNamedXAResource(session.getXAResource(), getName(), xaConnection); } catch (Exception e) { SystemException se = new SystemException("Failed to create ConnectionAndWrapperNamedXAResource, " + e.getLocalizedMessage()); se.initCause(e); LOGGER.error(se.getLocalizedMessage(), se); throw se; } } @Override public void returnNamedXAResource(NamedXAResource namedXaResource) { if (namedXaResource instanceof ConnectionAndWrapperNamedXAResource) { try { LOGGER.debug("closing returned namedXAResource's connection: " + ((ConnectionAndWrapperNamedXAResource)namedXaResource).connection); ((ConnectionAndWrapperNamedXAResource)namedXaResource).connection.close(); } catch (Exception ignored) { LOGGER.debug("failed to close returned namedXAResource: " + namedXaResource, ignored); } } } }); return true; } else { return false; } } } public static class ConnectionAndWrapperNamedXAResource extends WrapperNamedXAResource { final Connection connection; public ConnectionAndWrapperNamedXAResource(XAResource xaResource, String name, Connection connection) { super(xaResource, name); this.connection = connection; } } }




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