/**
* 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.network;
import java.io.IOException;
import java.util.Iterator;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ConsumerId;
import org.apache.activemq.command.ConsumerInfo;
import org.apache.activemq.filter.DestinationFilter;
import org.apache.activemq.transport.Transport;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Consolidates subscriptions
*
* @version $Revision: 1.1 $
*/
public class DurableConduitBridge extends ConduitBridge {
private static final Log LOG = LogFactory.getLog(DurableConduitBridge.class);
/**
* Constructor
*
* @param configuration
*
* @param localBroker
* @param remoteBroker
*/
public DurableConduitBridge(NetworkBridgeConfiguration configuration, Transport localBroker,
Transport remoteBroker) {
super(configuration, localBroker, remoteBroker);
}
/**
* Subscriptions for these destinations are always created
*
*/
protected void setupStaticDestinations() {
super.setupStaticDestinations();
ActiveMQDestination[] dests = durableDestinations;
if (dests != null) {
for (int i = 0; i < dests.length; i++) {
ActiveMQDestination dest = dests[i];
if (isPermissableDestination(dest) && !doesConsumerExist(dest)) {
DemandSubscription sub = createDemandSubscription(dest);
if (dest.isTopic()) {
sub.getLocalInfo().setSubscriptionName(getSubscriberName(dest));
}
try {
addSubscription(sub);
} catch (IOException e) {
LOG.error("Failed to add static destination " + dest, e);
}
if (LOG.isTraceEnabled()) {
LOG.trace("Forwarding messages for durable destination: " + dest);
}
}
}
}
}
protected DemandSubscription createDemandSubscription(ConsumerInfo info) throws IOException {
if (addToAlreadyInterestedConsumers(info)) {
return null; // don't want this subscription added
}
// not matched so create a new one
// but first, if it's durable - changed set the
// ConsumerId here - so it won't be removed if the
// durable subscriber goes away on the other end
if (info.isDurable() || (info.getDestination().isQueue() && !info.getDestination().isTemporary())) {
info.setConsumerId(new ConsumerId(localSessionInfo.getSessionId(), consumerIdGenerator
.getNextSequenceId()));
}
if (info.isDurable()) {
// set the subscriber name to something reproducible
info.setSubscriptionName(getSubscriberName(info.getDestination()));
}
return doCreateDemandSubscription(info);
}
protected String getSubscriberName(ActiveMQDestination dest) {
String subscriberName = configuration.getBrokerName() + "_" + dest.getPhysicalName();
return subscriberName;
}
protected boolean doesConsumerExist(ActiveMQDestination dest) {
DestinationFilter filter = DestinationFilter.parseFilter(dest);
for (Iterator i = subscriptionMapByLocalId.values().iterator(); i.hasNext();) {
DemandSubscription ds = (DemandSubscription)i.next();
if (filter.matches(ds.getLocalInfo().getDestination())) {
return true;
}
}
return false;
}
}