org.apache.catalina.ha.session.SessionMessageImpl Maven / Gradle / Ivy
/*
* 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 org.apache.catalina.ha.ClusterMessageBase;
/**
* Session cluster message
*
* @author Filip Hanik
* @author Peter Rossbach
*
* @version $Id: SessionMessageImpl.java 1195393 2011-10-31 10:22:31Z kfujino $
*/
public class SessionMessageImpl extends ClusterMessageBase implements SessionMessage {
private static final long serialVersionUID = 1L;
public SessionMessageImpl() {
}
/*
* Private serializable variables to keep the messages state
*/
private int mEvtType = -1;
private byte[] mSession;
private String mSessionID;
private String mContextName;
private long serializationTimestamp;
private boolean timestampSet = false ;
private String uniqueId;
private SessionMessageImpl( String contextName,
int eventtype,
byte[] session,
String sessionID)
{
mEvtType = eventtype;
mSession = session;
mSessionID = sessionID;
mContextName = contextName;
uniqueId = sessionID;
}
/**
* Creates a session message. Depending on what event type you want this
* message to represent, you populate the different parameters in the constructor
* The following rules apply dependent on what event type argument you use:
* EVT_SESSION_CREATED
* The parameters: session, sessionID must be set.
* EVT_SESSION_EXPIRED
* The parameters: sessionID must be set.
* EVT_SESSION_ACCESSED
* The parameters: sessionID must be set.
* EVT_GET_ALL_SESSIONS
* get all sessions from from one of the nodes.
* EVT_SESSION_DELTA
* Send attribute delta (add,update,remove attribute or principal, ...).
* EVT_ALL_SESSION_DATA
* Send complete serializes session list
* EVT_ALL_SESSION_TRANSFERCOMPLETE
* send that all session state information are transfered
* after GET_ALL_SESSION received from this sender.
* EVT_CHANGE_SESSION_ID
* send original sessionID and new sessionID.
* EVT_ALL_SESSION_NOCONTEXTMANAGER
* send that context manager does not exist
* after GET_ALL_SESSION received from this sender.
* @param contextName - the name of the context (application
* @param eventtype - one of the 8 event type defined in this class
* @param session - the serialized byte array of the session itself
* @param sessionID - the id that identifies this session
* @param uniqueID - the id that identifies this message
*/
public SessionMessageImpl( String contextName,
int eventtype,
byte[] session,
String sessionID,
String uniqueID)
{
this(contextName,eventtype,session,sessionID);
uniqueId = uniqueID;
}
/**
* returns the event type
* @return one of the event types EVT_XXXX
*/
@Override
public int getEventType() { return mEvtType; }
/**
* @return the serialized data for the session
*/
@Override
public byte[] getSession() { return mSession;}
/**
* @return the session ID for the session
*/
@Override
public String getSessionID(){ return mSessionID; }
/**
* set message send time but only the first setting works (one shot)
*/
@Override
public void setTimestamp(long time) {
synchronized(this) {
if(!timestampSet) {
serializationTimestamp=time;
timestampSet = true ;
}
}
}
@Override
public long getTimestamp() { return serializationTimestamp;}
/**
* clear text event type name (for logging purpose only)
* @return the event type in a string representation, useful for debugging
*/
@Override
public String getEventTypeString()
{
switch (mEvtType)
{
case EVT_SESSION_CREATED : return "SESSION-MODIFIED";
case EVT_SESSION_EXPIRED : return "SESSION-EXPIRED";
case EVT_SESSION_ACCESSED : return "SESSION-ACCESSED";
case EVT_GET_ALL_SESSIONS : return "SESSION-GET-ALL";
case EVT_SESSION_DELTA : return "SESSION-DELTA";
case EVT_ALL_SESSION_DATA : return "ALL-SESSION-DATA";
case EVT_ALL_SESSION_TRANSFERCOMPLETE : return "SESSION-STATE-TRANSFERED";
case EVT_CHANGE_SESSION_ID : return "SESSION-ID-CHANGED";
case EVT_ALL_SESSION_NOCONTEXTMANAGER : return "NO-CONTEXT-MANAGER";
default : return "UNKNOWN-EVENT-TYPE";
}
}
@Override
public String getContextName() {
return mContextName;
}
@Override
public String getUniqueId() {
return uniqueId;
}
@Override
public void setUniqueId(String uniqueId) {
this.uniqueId = uniqueId;
}
@Override
public String toString() {
return getEventTypeString() + "#" + getContextName() + "#" + getSessionID() ;
}
}