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ActiveMQ example source code file (KahaTransactionStore.java)
The ActiveMQ KahaTransactionStore.java source code/** * 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.store.kahadaptor; import java.io.IOException; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; import java.util.concurrent.ConcurrentHashMap; import javax.transaction.xa.XAException; import org.apache.activemq.broker.BrokerService; import org.apache.activemq.broker.BrokerServiceAware; import org.apache.activemq.broker.ConnectionContext; import org.apache.activemq.command.Message; import org.apache.activemq.command.MessageAck; import org.apache.activemq.command.MessageId; import org.apache.activemq.command.TransactionId; import org.apache.activemq.command.XATransactionId; import org.apache.activemq.kaha.RuntimeStoreException; import org.apache.activemq.store.MessageStore; import org.apache.activemq.store.ProxyMessageStore; import org.apache.activemq.store.ProxyTopicMessageStore; import org.apache.activemq.store.TopicMessageStore; import org.apache.activemq.store.TransactionRecoveryListener; import org.apache.activemq.store.TransactionStore; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Provides a TransactionStore implementation that can create transaction aware * MessageStore objects from non transaction aware MessageStore objects. * * */ public class KahaTransactionStore implements TransactionStore, BrokerServiceAware { private static final Logger LOG = LoggerFactory.getLogger(KahaTransactionStore.class); private final Map transactions = new ConcurrentHashMap(); private final Map prepared; private final KahaPersistenceAdapter adaptor; private BrokerService brokerService; KahaTransactionStore(KahaPersistenceAdapter adaptor, Map preparedMap) { this.adaptor = adaptor; this.prepared = preparedMap; } public MessageStore proxy(MessageStore messageStore) { return new ProxyMessageStore(messageStore) { @Override public void addMessage(ConnectionContext context, final Message send) throws IOException { KahaTransactionStore.this.addMessage(getDelegate(), send); } @Override public void removeMessage(ConnectionContext context, final MessageAck ack) throws IOException { KahaTransactionStore.this.removeMessage(getDelegate(), ack); } }; } public TopicMessageStore proxy(TopicMessageStore messageStore) { return new ProxyTopicMessageStore(messageStore) { @Override public void addMessage(ConnectionContext context, final Message send) throws IOException { KahaTransactionStore.this.addMessage(getDelegate(), send); } @Override public void removeMessage(ConnectionContext context, final MessageAck ack) throws IOException { KahaTransactionStore.this.removeMessage(getDelegate(), ack); } @Override public void acknowledge(ConnectionContext context, String clientId, String subscriptionName, MessageId messageId, MessageAck ack) throws IOException { KahaTransactionStore.this.acknowledge((TopicMessageStore)getDelegate(), clientId, subscriptionName, messageId, ack); } }; } /** * @see org.apache.activemq.store.TransactionStore#prepare(TransactionId) */ public void prepare(TransactionId txid) { KahaTransaction tx = getTx(txid); if (tx != null) { tx.prepare(); prepared.put(txid, tx); } } public void commit(TransactionId txid, boolean wasPrepared, Runnable before,Runnable after) throws IOException { if(before != null) { before.run(); } KahaTransaction tx = getTx(txid); if (tx != null) { tx.commit(this); removeTx(txid); } if (after != null) { after.run(); } } /** * @see org.apache.activemq.store.TransactionStore#rollback(TransactionId) */ public void rollback(TransactionId txid) { KahaTransaction tx = getTx(txid); if (tx != null) { tx.rollback(); removeTx(txid); } } public void start() throws Exception { } public void stop() throws Exception { } public synchronized void recover(TransactionRecoveryListener listener) throws IOException { for (Iterator i = prepared.entrySet().iterator(); i.hasNext();) { Map.Entry entry = (Entry)i.next(); XATransactionId xid = (XATransactionId)entry.getKey(); KahaTransaction kt = (KahaTransaction)entry.getValue(); listener.recover(xid, kt.getMessages(), kt.getAcks()); } } /** * @param message * @throws IOException */ void addMessage(final MessageStore destination, final Message message) throws IOException { try { if (message.isInTransaction()) { KahaTransaction tx = getOrCreateTx(message.getTransactionId()); tx.add((KahaMessageStore)destination, message); } else { destination.addMessage(null, message); } } catch (RuntimeStoreException rse) { if (rse.getCause() instanceof IOException) { brokerService.handleIOException((IOException)rse.getCause()); } throw rse; } } /** * @param ack * @throws IOException */ final void removeMessage(final MessageStore destination, final MessageAck ack) throws IOException { try { if (ack.isInTransaction()) { KahaTransaction tx = getOrCreateTx(ack.getTransactionId()); tx.add((KahaMessageStore)destination, ack); } else { destination.removeMessage(null, ack); } } catch (RuntimeStoreException rse) { if (rse.getCause() instanceof IOException) { brokerService.handleIOException((IOException)rse.getCause()); } throw rse; } } final void acknowledge(final TopicMessageStore destination, String clientId, String subscriptionName, MessageId messageId, MessageAck ack) throws IOException { try { if (ack.isInTransaction()) { KahaTransaction tx = getOrCreateTx(ack.getTransactionId()); tx.add((KahaMessageStore)destination, clientId, subscriptionName, messageId, ack); } else { destination.acknowledge(null, clientId, subscriptionName, messageId, ack); } } catch (RuntimeStoreException rse) { if (rse.getCause() instanceof IOException) { brokerService.handleIOException((IOException)rse.getCause()); } throw rse; } } protected synchronized KahaTransaction getTx(TransactionId key) { KahaTransaction result = (KahaTransaction)transactions.get(key); if (result == null) { result = (KahaTransaction)prepared.get(key); } return result; } protected synchronized KahaTransaction getOrCreateTx(TransactionId key) { KahaTransaction result = (KahaTransaction)transactions.get(key); if (result == null) { result = new KahaTransaction(); transactions.put(key, result); } return result; } protected synchronized void removeTx(TransactionId key) { transactions.remove(key); prepared.remove(key); } public void delete() { transactions.clear(); prepared.clear(); } protected MessageStore getStoreById(Object id) { return adaptor.retrieveMessageStore(id); } public void setBrokerService(BrokerService brokerService) { this.brokerService = brokerService; } } Other ActiveMQ examples (source code examples)Here is a short list of links related to this ActiveMQ KahaTransactionStore.java source code file: |
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