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 */
017 package org.apache.activemq.broker.region;
018
019 import javax.jms.JMSException;
020
021 import org.apache.activemq.broker.BrokerService;
022 import org.apache.activemq.broker.ConnectionContext;
023 import org.apache.activemq.broker.region.policy.PolicyEntry;
024 import org.apache.activemq.command.ActiveMQDestination;
025 import org.apache.activemq.command.ConsumerInfo;
026 import org.apache.activemq.command.MessageDispatchNotification;
027 import org.apache.activemq.thread.TaskRunnerFactory;
028 import org.apache.activemq.usage.SystemUsage;
029 import org.slf4j.Logger;
030 import org.slf4j.LoggerFactory;
031
032 /**
033 *
034 */
035 public 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 }