001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.broker.region;
018
019import javax.jms.JMSException;
020
021import org.apache.activemq.broker.BrokerService;
022import org.apache.activemq.broker.ConnectionContext;
023import org.apache.activemq.broker.region.policy.PolicyEntry;
024import org.apache.activemq.command.ActiveMQDestination;
025import org.apache.activemq.command.ConsumerInfo;
026import org.apache.activemq.command.MessageDispatchNotification;
027import org.apache.activemq.thread.TaskRunnerFactory;
028import org.apache.activemq.usage.SystemUsage;
029import org.slf4j.Logger;
030import org.slf4j.LoggerFactory;
031
032/**
033 * 
034 */
035public class TempQueueRegion extends AbstractTempRegion {
036    private static final Logger LOG = LoggerFactory.getLogger(TempQueueRegion.class);
037    private final BrokerService brokerService;
038    
039    public TempQueueRegion(RegionBroker broker, BrokerService brokerService, DestinationStatistics destinationStatistics, SystemUsage memoryManager, TaskRunnerFactory taskRunnerFactory,
040                           DestinationFactory destinationFactory) {
041        super(broker, destinationStatistics, memoryManager, taskRunnerFactory, destinationFactory);
042        // We should allow the following to be configurable via a Destination
043        // Policy
044        // setAutoCreateDestinations(false);
045        this.brokerService = brokerService;
046    }
047
048    protected Destination doCreateDestination(ConnectionContext context, ActiveMQDestination destination) throws Exception {  
049        TempQueue result = new TempQueue(brokerService, destination, null, destinationStatistics, taskRunnerFactory);
050        brokerService.getDestinationPolicy();
051        configureQueue(result, destination);
052        result.initialize();
053        return result;
054    }
055
056    protected Subscription createSubscription(ConnectionContext context, ConsumerInfo info) throws JMSException {
057        if (info.isBrowser()) {
058            return new QueueBrowserSubscription(broker,usageManager,context, info);
059        } else {
060            return new QueueSubscription(broker,usageManager,context, info);
061        }
062    }
063
064    public String toString() {
065        return "TempQueueRegion: destinations=" + destinations.size() + ", subscriptions=" + subscriptions.size() + ", memory=" + usageManager.getMemoryUsage().getPercentUsage() + "%";
066    }
067
068    public void removeDestination(ConnectionContext context, ActiveMQDestination destination, long timeout) throws Exception {
069
070        // Force a timeout value so that we don't get an error that
071        // there is still an active sub. Temp destination may be removed
072        // while a network sub is still active which is valid.
073        if (timeout == 0) {
074            timeout = 1;
075        }
076
077        super.removeDestination(context, destination, timeout);
078    }
079    
080    /*
081     * For a Queue, dispatch order is imperative to match acks, so the dispatch is deferred till 
082     * the notification to ensure that the subscription chosen by the master is used.
083     * 
084     * (non-Javadoc)
085     * @see org.apache.activemq.broker.region.AbstractRegion#processDispatchNotification(org.apache.activemq.command.MessageDispatchNotification)
086     */
087    public void processDispatchNotification(MessageDispatchNotification messageDispatchNotification) throws Exception {
088        processDispatchNotificationViaDestination(messageDispatchNotification);
089    }
090
091    protected void configureQueue(Queue queue, ActiveMQDestination destination) {
092        if (broker == null) {
093            throw new IllegalStateException("broker property is not set");
094        }
095        if (broker.getDestinationPolicy() != null) {
096            PolicyEntry entry = broker.getDestinationPolicy().getEntryFor(destination);
097            if (entry != null) {
098                entry.configure(broker,queue);
099            }
100        }
101    }
102
103}