| /** |
| * 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.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.Timer; |
| import java.util.TimerTask; |
| |
| import org.apache.activemq.broker.ConnectionContext; |
| import org.apache.activemq.command.ActiveMQDestination; |
| import org.apache.activemq.thread.TaskRunnerFactory; |
| import org.apache.activemq.usage.SystemUsage; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * |
| */ |
| public abstract class AbstractTempRegion extends AbstractRegion { |
| private static final Logger LOG = LoggerFactory.getLogger(TempQueueRegion.class); |
| |
| private Map<CachedDestination, Destination> cachedDestinations = new HashMap<CachedDestination, Destination>(); |
| private final boolean doCacheTempDestinations; |
| private final int purgeTime; |
| private Timer purgeTimer; |
| private TimerTask purgeTask; |
| |
| |
| /** |
| * @param broker |
| * @param destinationStatistics |
| * @param memoryManager |
| * @param taskRunnerFactory |
| * @param destinationFactory |
| */ |
| public AbstractTempRegion(RegionBroker broker, |
| DestinationStatistics destinationStatistics, |
| SystemUsage memoryManager, TaskRunnerFactory taskRunnerFactory, |
| DestinationFactory destinationFactory) { |
| super(broker, destinationStatistics, memoryManager, taskRunnerFactory, |
| destinationFactory); |
| this.doCacheTempDestinations=broker.getBrokerService().isCacheTempDestinations(); |
| this.purgeTime = broker.getBrokerService().getTimeBeforePurgeTempDestinations(); |
| if (this.doCacheTempDestinations) { |
| this.purgeTimer = new Timer("ActiveMQ Temp destination purge timer", true); |
| this.purgeTask = new TimerTask() { |
| public void run() { |
| doPurge(); |
| } |
| |
| }; |
| this.purgeTimer.schedule(purgeTask, purgeTime, purgeTime); |
| } |
| |
| } |
| |
| public void stop() throws Exception { |
| super.stop(); |
| if (purgeTimer != null) { |
| purgeTimer.cancel(); |
| } |
| } |
| |
| protected abstract Destination doCreateDestination( |
| ConnectionContext context, ActiveMQDestination destination) |
| throws Exception; |
| |
| protected synchronized Destination createDestination( |
| ConnectionContext context, ActiveMQDestination destination) |
| throws Exception { |
| Destination result = cachedDestinations.remove(new CachedDestination( |
| destination)); |
| if (result == null) { |
| result = doCreateDestination(context, destination); |
| } |
| return result; |
| } |
| |
| protected final synchronized void dispose(ConnectionContext context, |
| Destination dest) throws Exception { |
| // add to cache |
| if (this.doCacheTempDestinations) { |
| cachedDestinations.put(new CachedDestination(dest |
| .getActiveMQDestination()), dest); |
| }else { |
| try { |
| dest.dispose(context); |
| dest.stop(); |
| } catch (Exception e) { |
| LOG.warn("Failed to dispose of " + dest, e); |
| } |
| } |
| } |
| |
| private void doDispose(Destination dest) { |
| ConnectionContext context = new ConnectionContext(); |
| try { |
| dest.dispose(context); |
| dest.stop(); |
| } catch (Exception e) { |
| LOG.warn("Failed to dispose of " + dest, e); |
| } |
| |
| } |
| |
| private synchronized void doPurge() { |
| long currentTime = System.currentTimeMillis(); |
| if (cachedDestinations.size() > 0) { |
| Set<CachedDestination> tmp = new HashSet<CachedDestination>( |
| cachedDestinations.keySet()); |
| for (CachedDestination key : tmp) { |
| if ((key.timeStamp + purgeTime) < currentTime) { |
| Destination dest = cachedDestinations.remove(key); |
| if (dest != null) { |
| doDispose(dest); |
| } |
| } |
| } |
| } |
| } |
| |
| static class CachedDestination { |
| long timeStamp; |
| |
| ActiveMQDestination destination; |
| |
| CachedDestination(ActiveMQDestination destination) { |
| this.destination = destination; |
| this.timeStamp = System.currentTimeMillis(); |
| } |
| |
| public int hashCode() { |
| return destination.hashCode(); |
| } |
| |
| public boolean equals(Object o) { |
| if (o instanceof CachedDestination) { |
| CachedDestination other = (CachedDestination) o; |
| return other.destination.equals(this.destination); |
| } |
| return false; |
| } |
| |
| } |
| |
| } |