examples/tomcat6/apache-tomcat-6.0.35-src/java/org/apache/catalina/ha/ClusterListener.java
Merged with mercurial revision 4f3cc813be4 (8 changesets total)
Merged changesets:
- f14cd4bbd33f: Jan Vrany, 2015-03-11 11:41 +0000: Zulu support: added Zulu7 and Zulu8 JavaReleases
- f8bc54a17beb: Jan Vrany, 2015-03-11 12:38 +0000: Java release: On UNIX, prefer OpenJDK over Zulu, on Windows, prefer Zulu over Oracle JDK
- 5dd55aa7d949: Jan Vrany, 2015-03-12 14:50 +0000: Zulu support: move natives from OracleJDK7 to OpenJDK7 as they are used by OpenJDK7 on Windows
- 2127b5057d60: Jan Vrany, 2015-03-13 09:40 +0000: testing: improved run-all.rb script to run tests with different configurations.
- a6d8f5c2ad73: Jan Vrany, 2015-03-13 13:33 +0000: Updated .hgignore
- e18d5c89221d: Jan Vrany, 2015-03-13 16:09 +0000: Java release: consult 64bit registry entries as well as 32 bit when searching for installed JDKs
- 183e4567bda7: Jan Vrany, 2015-03-17 20:56 +0000: Java release: added #is32bit & #is64bit testing methods
- 4f3cc813be4b: Jan Vrany, 2015-03-19 17:27 +0000: settings: JavaCodeLibrary validation refactored and improved
/*
* 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.catalina.ha;
import java.io.Serializable;
import org.apache.catalina.tribes.ChannelListener;
import org.apache.catalina.tribes.Member;
import org.apache.catalina.util.StringManager;
/**
* Receive SessionID cluster change from other backup node after primary session
* node is failed.
*
* @author Peter Rossbach
* @author Filip Hanik
* @version $Id: ClusterListener.java,v 1.5 2015-03-20 12:08:04 vrany Exp $
*/
public abstract class ClusterListener implements ChannelListener {
public static org.apache.juli.logging.Log log = org.apache.juli.logging.LogFactory.getLog(ClusterListener.class);
//--Instance Variables--------------------------------------
/**
* The string manager for this package.
*/
protected StringManager sm = StringManager.getManager(Constants.Package);
protected CatalinaCluster cluster = null;
//--Constructor---------------------------------------------
public ClusterListener() {
}
//--Instance Getters/Setters--------------------------------
public CatalinaCluster getCluster() {
return cluster;
}
public void setCluster(CatalinaCluster cluster) {
if (log.isDebugEnabled()) {
if (cluster != null)
log.debug("add ClusterListener " + this.toString() + " to cluster" + cluster);
else
log.debug("remove ClusterListener " + this.toString() + " from cluster");
}
this.cluster = cluster;
}
public boolean equals(Object listener) {
return super.equals(listener);
}
public int hashCode() {
return super.hashCode();
}
//--Logic---------------------------------------------------
public final void messageReceived(Serializable msg, Member member) {
if ( msg instanceof ClusterMessage ) messageReceived((ClusterMessage)msg);
}
public final boolean accept(Serializable msg, Member member) {
if ( msg instanceof ClusterMessage ) return true;
return false;
}
/**
* Callback from the cluster, when a message is received, The cluster will
* broadcast it invoking the messageReceived on the receiver.
*
* @param msg
* ClusterMessage - the message received from the cluster
*/
public abstract void messageReceived(ClusterMessage msg) ;
/**
* Accept only SessionIDMessages
*
* @param msg
* ClusterMessage
* @return boolean - returns true to indicate that messageReceived should be
* invoked. If false is returned, the messageReceived method will
* not be invoked.
*/
public abstract boolean accept(ClusterMessage msg) ;
}