| /* |
| * Copyright 1999,2004 The Apache Software Foundation. |
| * |
| * Licensed 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.cluster.session; |
| |
| import java.util.Map; |
| |
| import org.apache.catalina.cluster.ClusterManager; |
| import org.apache.catalina.cluster.ClusterMessage; |
| |
| /** |
| * Receive replicated SessionMessage form other cluster node. |
| * |
| * @author Peter Rossbach |
| * @version $Revision$ $Date$ |
| */ |
| public class ClusterSessionListener extends ClusterListener { |
| |
| /** |
| * The descriptive information about this implementation. |
| */ |
| protected static final String info = "org.apache.catalina.session.ClusterSessionListener/1.1"; |
| |
| //--Constructor--------------------------------------------- |
| |
| public ClusterSessionListener() { |
| } |
| |
| //--Logic--------------------------------------------------- |
| |
| /** |
| * Return descriptive information about this implementation. |
| */ |
| public String getInfo() { |
| |
| return (info); |
| |
| } |
| |
| /** |
| * Callback from the cluster, when a message is received, The cluster will |
| * broadcast it invoking the messageReceived on the receiver. |
| * |
| * @param myobj |
| * ClusterMessage - the message received from the cluster |
| */ |
| public void messageReceived(ClusterMessage myobj) { |
| if (myobj != null && myobj instanceof SessionMessage) { |
| SessionMessage msg = (SessionMessage) myobj; |
| String ctxname = msg.getContextName(); |
| //check if the message is a EVT_GET_ALL_SESSIONS, |
| //if so, wait until we are fully started up |
| Map managers = cluster.getManagers() ; |
| if (ctxname == null) { |
| java.util.Iterator i = managers.keySet().iterator(); |
| while (i.hasNext()) { |
| String key = (String) i.next(); |
| ClusterManager mgr = (ClusterManager) managers.get(key); |
| if (mgr != null) |
| mgr.messageDataReceived(msg); |
| else { |
| //this happens a lot before the system has started |
| // up |
| if (log.isDebugEnabled()) |
| log.debug("Context manager doesn't exist:" |
| + key); |
| } |
| } |
| } else { |
| ClusterManager mgr = (ClusterManager) managers.get(ctxname); |
| if (mgr != null) |
| mgr.messageDataReceived(msg); |
| else if (log.isWarnEnabled()) |
| log.warn("Context manager doesn't exist:" + ctxname); |
| } |
| } |
| } |
| |
| /** |
| * Accept only SessionMessage |
| * |
| * @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 boolean accept(ClusterMessage msg) { |
| return (msg instanceof SessionMessage); |
| } |
| } |
| |