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ActiveMQ example source code file (TempQueue.java)
The ActiveMQ TempQueue.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.broker.region; import java.io.IOException; import org.apache.activemq.broker.BrokerService; import org.apache.activemq.broker.ConnectionContext; import org.apache.activemq.broker.region.cursors.VMPendingMessageCursor; import org.apache.activemq.command.ActiveMQDestination; import org.apache.activemq.command.ActiveMQTempDestination; import org.apache.activemq.store.MessageStore; import org.apache.activemq.thread.TaskRunnerFactory; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * The Queue is a List of MessageEntry objects that are dispatched to matching * subscriptions. * * */ public class TempQueue extends Queue{ private static final Logger LOG = LoggerFactory.getLogger(TempQueue.class); private final ActiveMQTempDestination tempDest; /** * @param brokerService * @param destination * @param store * @param parentStats * @param taskFactory * @throws Exception */ public TempQueue(BrokerService brokerService, ActiveMQDestination destination, MessageStore store, DestinationStatistics parentStats, TaskRunnerFactory taskFactory) throws Exception { super(brokerService, destination, store, parentStats, taskFactory); this.tempDest = (ActiveMQTempDestination) destination; } @Override public void initialize() throws Exception { this.messages=new VMPendingMessageCursor(false); this.messages.setMemoryUsageHighWaterMark(getCursorMemoryHighWaterMark()); this.systemUsage = brokerService.getSystemUsage(); memoryUsage.setParent(systemUsage.getMemoryUsage()); this.taskRunner = taskFactory.createTaskRunner(this, "TempQueue: " + destination.getPhysicalName()); } @Override public void addSubscription(ConnectionContext context, Subscription sub) throws Exception { // Only consumers on the same connection can consume from // the temporary destination // However, we could have failed over - and we do this // check client side anyways .... if (!context.isFaultTolerant() && (!context.isNetworkConnection() && !tempDest .getConnectionId().equals( sub.getConsumerInfo().getConsumerId() .getConnectionId()))) { tempDest.setConnectionId(sub.getConsumerInfo().getConsumerId().getConnectionId()); LOG.debug(" changed ownership of " + this + " to "+ tempDest.getConnectionId()); } super.addSubscription(context, sub); } @Override public void dispose(ConnectionContext context) throws IOException { try { purge(); } catch (Exception e) { LOG.warn("Caught an exception purging Queue: " + destination); } super.dispose(context); } } Other ActiveMQ examples (source code examples)Here is a short list of links related to this ActiveMQ TempQueue.java source code file: |
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