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.ConnectionContext;
022 import org.apache.activemq.broker.region.policy.PolicyEntry;
023 import org.apache.activemq.command.ActiveMQDestination;
024 import org.apache.activemq.command.ConsumerInfo;
025 import org.apache.activemq.thread.TaskRunnerFactory;
026 import org.apache.activemq.usage.SystemUsage;
027 import org.slf4j.Logger;
028 import org.slf4j.LoggerFactory;
029
030 /**
031 *
032 */
033 public class TempTopicRegion extends AbstractTempRegion {
034
035 private static final Logger LOG = LoggerFactory.getLogger(TempTopicRegion.class);
036
037 public TempTopicRegion(RegionBroker broker, DestinationStatistics destinationStatistics, SystemUsage memoryManager, TaskRunnerFactory taskRunnerFactory,
038 DestinationFactory destinationFactory) {
039 super(broker, destinationStatistics, memoryManager, taskRunnerFactory, destinationFactory);
040 // We should allow the following to be configurable via a Destination
041 // Policy
042 // setAutoCreateDestinations(false);
043 }
044
045 protected Subscription createSubscription(ConnectionContext context, ConsumerInfo info) throws JMSException {
046 if (info.isDurable()) {
047 throw new JMSException("A durable subscription cannot be created for a temporary topic.");
048 }
049 try {
050 TopicSubscription answer = new TopicSubscription(broker, context, info, usageManager);
051 // lets configure the subscription depending on the destination
052 ActiveMQDestination destination = info.getDestination();
053 if (destination != null && broker.getDestinationPolicy() != null) {
054 PolicyEntry entry = broker.getDestinationPolicy().getEntryFor(destination);
055 if (entry != null) {
056 entry.configure(broker, usageManager, answer);
057 }
058 }
059 answer.init();
060 return answer;
061 } catch (Exception e) {
062 LOG.error("Failed to create TopicSubscription ", e);
063 JMSException jmsEx = new JMSException("Couldn't create TopicSubscription");
064 jmsEx.setLinkedException(e);
065 throw jmsEx;
066 }
067 }
068
069 public String toString() {
070 return "TempTopicRegion: destinations=" + destinations.size() + ", subscriptions=" + subscriptions.size() + ", memory=" + usageManager.getMemoryUsage().getPercentUsage() + "%";
071 }
072
073 public void removeDestination(ConnectionContext context, ActiveMQDestination destination, long timeout) throws Exception {
074
075 // Force a timeout value so that we don't get an error that
076 // there is still an active sub. Temp destination may be removed
077 // while a network sub is still active which is valid.
078 if (timeout == 0) {
079 timeout = 1;
080 }
081
082 super.removeDestination(context, destination, timeout);
083 }
084
085
086 protected Destination doCreateDestination(ConnectionContext context,
087 ActiveMQDestination destination) throws Exception {
088 return destinationFactory.createDestination(context, destination, destinationStatistics);
089 }
090 }