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The ActiveMQ Message Broker and Client implementations
/**
* 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.Iterator;
import java.util.Set;
import javax.jms.JMSException;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ConsumerInfo;
import org.apache.activemq.command.MessageDispatchNotification;
import org.apache.activemq.thread.TaskRunnerFactory;
import org.apache.activemq.usage.SystemUsage;
/**
*
* @version $Revision: 1.9 $
*/
public class QueueRegion extends AbstractRegion {
public QueueRegion(RegionBroker broker, DestinationStatistics destinationStatistics,
SystemUsage memoryManager, TaskRunnerFactory taskRunnerFactory,
DestinationFactory destinationFactory) {
super(broker, destinationStatistics, memoryManager, taskRunnerFactory, destinationFactory);
}
public String toString() {
return "QueueRegion: destinations=" + destinations.size() + ", subscriptions=" + subscriptions.size()
+ ", memory=" + usageManager.getMemoryUsage().getPercentUsage() + "%";
}
protected Subscription createSubscription(ConnectionContext context, ConsumerInfo info)
throws JMSException {
ActiveMQDestination destination = info.getDestination();
PolicyEntry entry = null;
if (destination != null && broker.getDestinationPolicy() != null) {
entry = broker.getDestinationPolicy().getEntryFor(destination);
}
if (info.isBrowser()) {
QueueBrowserSubscription sub = new QueueBrowserSubscription(broker,usageManager, context, info);
if (entry != null) {
entry.configure(broker, usageManager, sub);
}
return sub;
} else {
QueueSubscription sub = new QueueSubscription(broker, usageManager,context, info);
if (entry != null) {
entry.configure(broker, usageManager, sub);
}
return sub;
}
}
protected Set getInactiveDestinations() {
Set inactiveDestinations = super.getInactiveDestinations();
for (Iterator iter = inactiveDestinations.iterator(); iter.hasNext();) {
ActiveMQDestination dest = iter.next();
if (!dest.isQueue()) {
iter.remove();
}
}
return inactiveDestinations;
}
/*
* For a Queue, dispatch order is imperative to match acks, so the dispatch is deferred till
* the notification to ensure that the subscription chosen by the master is used.
*
* (non-Javadoc)
* @see org.apache.activemq.broker.region.AbstractRegion#processDispatchNotification(org.apache.activemq.command.MessageDispatchNotification)
*/
public void processDispatchNotification(MessageDispatchNotification messageDispatchNotification) throws Exception {
processDispatchNotificationViaDestination(messageDispatchNotification);
}
}