/*
* 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.session;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.Session;
import org.apache.catalina.ha.CatalinaCluster;
import org.apache.catalina.ha.ClusterManager;
import org.apache.catalina.ha.ClusterMessage;
import org.apache.catalina.session.StandardManager;
import org.apache.catalina.tribes.Channel;
import org.apache.catalina.tribes.io.ReplicationStream;
import org.apache.catalina.tribes.tipis.LazyReplicatedMap;
/**
*@author Filip Hanik
*@version 1.0
*/
public class BackupManager extends StandardManager implements ClusterManager
{
public static org.apache.juli.logging.Log log = org.apache.juli.logging.LogFactory.getLog( BackupManager.class );
protected static long DEFAULT_REPL_TIMEOUT = 15000;//15 seconds
/** Set to true if we don't want the sessions to expire on shutdown */
protected boolean mExpireSessionsOnShutdown = true;
/**
* The name of this manager
*/
protected String name;
/**
* A reference to the cluster
*/
protected CatalinaCluster cluster;
/**
* Should listeners be notified?
*/
private boolean notifyListenersOnReplication;
/**
*
*/
private int mapSendOptions = Channel.SEND_OPTIONS_SYNCHRONIZED_ACK|Channel.SEND_OPTIONS_USE_ACK;
/**
* Constructor, just calls super()
*
*/
public BackupManager() {
super();
}
//******************************************************************************/
// ClusterManager Interface
//******************************************************************************/
public void messageDataReceived(ClusterMessage msg) {
}
public boolean doDomainReplication() {
return false;
}
/**
* @param sendClusterDomainOnly The sendClusterDomainOnly to set.
*/
public void setDomainReplication(boolean sendClusterDomainOnly) {
}
/**
* @return Returns the defaultMode.
*/
public boolean isDefaultMode() {
return false;
}
/**
* @param defaultMode The defaultMode to set.
*/
public void setDefaultMode(boolean defaultMode) {
}
public void setExpireSessionsOnShutdown(boolean expireSessionsOnShutdown)
{
mExpireSessionsOnShutdown = expireSessionsOnShutdown;
}
public void setCluster(CatalinaCluster cluster) {
if(log.isDebugEnabled())
log.debug("Cluster associated with SimpleTcpReplicationManager");
this.cluster = cluster;
}
public boolean getExpireSessionsOnShutdown()
{
return mExpireSessionsOnShutdown;
}
/**
* Override persistence since they don't go hand in hand with replication for now.
*/
public void unload() throws IOException {
}
public ClusterMessage requestCompleted(String sessionId) {
if ( !this.started ) return null;
LazyReplicatedMap map = (LazyReplicatedMap)sessions;
map.replicate(sessionId,false);
return null;
}
//=========================================================================
// OVERRIDE THESE METHODS TO IMPLEMENT THE REPLICATION
//=========================================================================
public Session createEmptySession() {
return new DeltaSession(this);
}
public ClassLoader[] getClassLoaders() {
return ClusterManagerBase.getClassLoaders(this.container);
}
/**
* Open Stream and use correct ClassLoader (Container) Switch
* ThreadClassLoader
*
* @param data
* @return The object input stream
* @throws IOException
*/
public ReplicationStream getReplicationStream(byte[] data) throws IOException {
return getReplicationStream(data,0,data.length);
}
public ReplicationStream getReplicationStream(byte[] data, int offset, int length) throws IOException {
ByteArrayInputStream fis = new ByteArrayInputStream(data, offset, length);
return new ReplicationStream(fis, getClassLoaders());
}
public String getName() {
return this.name;
}
/**
* Prepare for the beginning of active use of the public methods of this
* component. This method should be called after <code>configure()</code>,
* and before any of the public methods of the component are utilized.<BR>
* Starts the cluster communication channel, this will connect with the other nodes
* in the cluster, and request the current session state to be transferred to this node.
* @exception IllegalStateException if this component has already been
* started
* @exception LifecycleException if this component detects a fatal error
* that prevents this component from being used
*/
public void start() throws LifecycleException {
if ( this.started ) return;
try {
cluster.registerManager(this);
CatalinaCluster catclust = (CatalinaCluster)cluster;
LazyReplicatedMap map = new LazyReplicatedMap(this,
catclust.getChannel(),
DEFAULT_REPL_TIMEOUT,
getMapName(),
getClassLoaders());
map.setChannelSendOptions(mapSendOptions);
this.sessions = map;
super.start();
this.started = true;
} catch ( Exception x ) {
log.error("Unable to start BackupManager",x);
throw new LifecycleException("Failed to start BackupManager",x);
}
}
public String getMapName() {
CatalinaCluster catclust = (CatalinaCluster)cluster;
String name = catclust.getManagerName(getName(),this)+"-"+"map";
if ( log.isDebugEnabled() ) log.debug("Backup manager, Setting map name to:"+name);
return name;
}
/**
* Gracefully terminate the active use of the public methods of this
* component. This method should be the last one called on a given
* instance of this component.<BR>
* This will disconnect the cluster communication channel and stop the listener thread.
* @exception IllegalStateException if this component has not been started
* @exception LifecycleException if this component detects a fatal error
* that needs to be reported
*/
public void stop() throws LifecycleException
{
LazyReplicatedMap map = (LazyReplicatedMap)sessions;
if ( map!=null ) {
map.breakdown();
}
if ( !this.started ) return;
try {
} catch ( Exception x ){
log.error("Unable to stop BackupManager",x);
throw new LifecycleException("Failed to stop BackupManager",x);
} finally {
super.stop();
}
cluster.removeManager(this);
}
public void setDistributable(boolean dist) {
this.distributable = dist;
}
public boolean getDistributable() {
return distributable;
}
public void setName(String name) {
this.name = name;
}
public boolean isNotifyListenersOnReplication() {
return notifyListenersOnReplication;
}
public void setNotifyListenersOnReplication(boolean notifyListenersOnReplication) {
this.notifyListenersOnReplication = notifyListenersOnReplication;
}
public void setMapSendOptions(int mapSendOptions) {
this.mapSendOptions = mapSendOptions;
}
/*
* @see org.apache.catalina.ha.ClusterManager#getCluster()
*/
public CatalinaCluster getCluster() {
return cluster;
}
public int getMapSendOptions() {
return mapSendOptions;
}
public String[] getInvalidatedSessions() {
return new String[0];
}
public ClusterManager cloneFromTemplate() {
BackupManager result = new BackupManager();
result.mExpireSessionsOnShutdown = mExpireSessionsOnShutdown;
result.name = "Clone-from-"+name;
result.cluster = cluster;
result.notifyListenersOnReplication = notifyListenersOnReplication;
result.mapSendOptions = mapSendOptions;
return result;
}
}
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