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/*
* 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.ClusterMessage;
/**
* The SessionMessage interface is used when a session has been created, modified, expired in a Tomcat cluster node.
* <p>
* The following events are currently available:
* <ul>
* <li>{@code public static final int EVT_SESSION_CREATED}</li>
* <li>{@code public static final int EVT_SESSION_EXPIRED}</li>
* <li>{@code public static final int EVT_SESSION_ACCESSED}</li>
* <li>{@code public static final int EVT_GET_ALL_SESSIONS}</li>
* <li>{@code public static final int EVT_SESSION_DELTA}</li>
* <li>{@code public static final int EVT_ALL_SESSION_DATA}</li>
* <li>{@code public static final int EVT_ALL_SESSION_TRANSFERCOMPLETE}</li>
* <li>{@code public static final int EVT_CHANGE_SESSION_ID}</li>
* <li>{@code public static final int EVT_ALL_SESSION_NOCONTEXTMANAGER}</li>
* </ul>
*/
public interface SessionMessage extends ClusterMessage {
/**
* Event type used when a session has been created on a node
*/
int EVT_SESSION_CREATED = 1;
/**
* Event type used when a session has expired
*/
int EVT_SESSION_EXPIRED = 2;
/**
* Event type used when a session has been accessed (ie, last access time has been updated). This is used so that
* the replicated sessions will not expire on the network
*/
int EVT_SESSION_ACCESSED = 3;
/**
* Event type used when a server comes online for the first time. The first thing the newly started server wants to
* do is to grab the all the sessions from one of the nodes and keep the same state in there
*/
int EVT_GET_ALL_SESSIONS = 4;
/**
* Event type used when an attribute has been added to a session, the attribute will be sent to all the other nodes
* in the cluster
*/
int EVT_SESSION_DELTA = 13;
/**
* When a session state is transferred, this is the event.
*/
int EVT_ALL_SESSION_DATA = 12;
/**
* When a session state is complete transferred, this is the event.
*/
int EVT_ALL_SESSION_TRANSFERCOMPLETE = 14;
/**
* Event type used when a sessionID has been changed.
*/
int EVT_CHANGE_SESSION_ID = 15;
/**
* Event type used when context manager doesn't exist. This is used when the manager which send a session state does
* not exist.
*/
int EVT_ALL_SESSION_NOCONTEXTMANAGER = 16;
/**
* @return the context name associated with this message
*/
String getContextName();
/**
* Clear text event type name (for logging purpose only).
*
* @return the event type in a string representation, useful for debugging
*/
String getEventTypeString();
/**
* returns the event type
*
* @return one of the event types EVT_XXXX
*/
int getEventType();
/**
* @return the serialized data for the session
*/
byte[] getSession();
/**
* @return the session ID for the session
*/
String getSessionID();
}// SessionMessage
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