?? pooledspringxaconnectionfactory.java
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/** * Licensed 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.jencks.pool;import java.util.Map;import javax.jms.Connection;import javax.jms.JMSException;import javax.jms.XAConnectionFactory;import javax.jms.ConnectionFactory;import javax.jms.XAConnection;import javax.transaction.TransactionManager;import org.activemq.pool.ConnectionKey;import org.springframework.transaction.jta.JtaTransactionManager;import EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap;public class PooledSpringXAConnectionFactory implements ConnectionFactory { private XAConnectionFactory connectionFactory; private TransactionManager transactionManager; private Map cache = new ConcurrentHashMap(); private Map pooledClientIds = new ConcurrentHashMap(); public PooledSpringXAConnectionFactory( final XAConnectionFactory connectionFactory, final TransactionManager transactionManager) { this.connectionFactory = connectionFactory; this.transactionManager = transactionManager; } public PooledSpringXAConnectionFactory() { } public TransactionManager getTransactionManager() { return this.transactionManager; } public void setTransactionManager(final TransactionManager transactionManager) { this.transactionManager = transactionManager; } public void setJtaTransactionManager(final JtaTransactionManager jtaTransactionManager) { setTransactionManager(jtaTransactionManager.getTransactionManager()); } public XAConnectionFactory getConnectionFactory() { return this.connectionFactory; } public void setConnectionFactory(final XAConnectionFactory connectionFactory) { this.connectionFactory = connectionFactory; } public Connection createConnection() throws JMSException { return createConnection(null, null); } public synchronized Connection createConnection(final String userName, final String password) throws JMSException { final ConnectionKey key = new ConnectionKey(userName, password); PooledSpringXAConnection connection = (PooledSpringXAConnection) this.cache.get(key); if (connection == null) { final XAConnection delegate = createConnection(key); connection = new PooledSpringXAConnection(this, getTransactionManager(), delegate); this.cache.put(key, connection); } return connection.newInstance(); } protected XAConnection createConnection(ConnectionKey key) throws JMSException { if (key.getUserName() == null && key.getPassword() == null) { return this.connectionFactory.createXAConnection(); } else { return this.connectionFactory.createXAConnection(key.getUserName(), key.getPassword()); } } public String generateClientID(final String requestedClientID) { if (requestedClientID == null) { return null; } final int num; synchronized (this) { final Integer lastCount = (Integer) this.pooledClientIds .get(requestedClientID); if (lastCount == null) { num = 1; } else { num = lastCount.intValue() + 1; } this.pooledClientIds.put(requestedClientID, new Integer(num)); } return requestedClientID + "-" + num; } public void start() throws JMSException { } public void stop() throws JMSException { }}
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