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Java > Open Source Codes > org > apache > activemq > network > DemandForwardingBridge


1 /**
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one or more
4  * contributor license agreements. See the NOTICE file distributed with
5  * this work for additional information regarding copyright ownership.
6  * The ASF licenses this file to You under the Apache License, Version 2.0
7  * (the "License"); you may not use this file except in compliance with
8  * the License. You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 package org.apache.activemq.network;
19
20 import org.apache.activemq.command.BrokerId;
21 import org.apache.activemq.command.BrokerInfo;
22 import org.apache.activemq.command.Command;
23 import org.apache.activemq.command.ConsumerInfo;
24 import org.apache.activemq.command.NetworkBridgeFilter;
25 import org.apache.activemq.transport.Transport;
26 import org.apache.activemq.util.ServiceSupport;
27
28 import java.io.IOException JavaDoc;
29
30 /**
31  * Forwards messages from the local broker to the remote broker based on demand.
32  *
33  * @org.apache.xbean.XBean
34  *
35  * @version $Revision$
36  */
37 public class DemandForwardingBridge extends DemandForwardingBridgeSupport {
38
39     protected final BrokerId remoteBrokerPath[] = new BrokerId[] { null };
40     protected Object JavaDoc brokerInfoMutex = new Object JavaDoc();
41     protected BrokerId remoteBrokerId;
42
43     public DemandForwardingBridge(NetworkBridgeConfiguration configuration,Transport localBroker,Transport remoteBroker){
44         super(configuration,localBroker, remoteBroker);
45     }
46
47     protected void serviceRemoteBrokerInfo(Command command) throws IOException JavaDoc {
48         synchronized(brokerInfoMutex){
49             BrokerInfo remoteBrokerInfo=(BrokerInfo) command;
50             remoteBrokerId=remoteBrokerInfo.getBrokerId();
51             remoteBrokerPath[0]=remoteBrokerId;
52             remoteBrokerName=remoteBrokerInfo.getBrokerName();
53             if(localBrokerId!=null){
54                 if(localBrokerId.equals(remoteBrokerId)){
55                     log.info("Disconnecting loop back connection.");
56                     //waitStarted();
57 ServiceSupport.dispose(this);
58                 }
59             }
60             remoteBrokerNameKnownLatch.countDown();
61         }
62     }
63
64     protected void addRemoteBrokerToBrokerPath(ConsumerInfo info) {
65         info.setBrokerPath(appendToBrokerPath(info.getBrokerPath(),getRemoteBrokerPath()));
66     }
67
68     protected void serviceLocalBrokerInfo(Command command) throws InterruptedException JavaDoc {
69         synchronized(brokerInfoMutex){
70             localBrokerId=((BrokerInfo) command).getBrokerId();
71             localBrokerPath[0]=localBrokerId;
72             if(remoteBrokerId!=null){
73                 if(remoteBrokerId.equals(localBrokerId)){
74                     log.info("Disconnecting loop back connection.");
75                     waitStarted();
76                     ServiceSupport.dispose(this);
77                 }
78             }
79         }
80     }
81     
82     protected NetworkBridgeFilter createNetworkBridgeFilter(ConsumerInfo info) throws IOException JavaDoc {
83         return new NetworkBridgeFilter(remoteBrokerPath[0], configuration.getNetworkTTL());
84     }
85     
86     protected BrokerId[] getRemoteBrokerPath(){
87         return remoteBrokerPath;
88     }
89 }
90
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