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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2006, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jdiameter.api;

/**
 * The session delivery objects are responsible for delivering all incoming Message to a specific session.
 * It determines the Diameter Session object that the message belongs to by querying the message's session id AVP.
 * The delivery object searches the local session database for a matching session. If no matching session is found,
 * the delivery object will lookup a matching session factory object that has an application id matching the
 * application id of the message. If there is a registered session factory, then the delivery object will ask the
 * factory to create a new session and delivery the message to the newly created session. If non of these lookup's
 * are successful, the session delivery object will silently discard the message.
 * Wrapper interface allows adapt message to any driver vendor specific interface
 * Serializable interface allows use this class in SLEE Event objects
 * 
 * @version 1.5.1 Final
 * 
 * @author [email protected]
 * @author [email protected]
 * @author  Alexandre Mendonca 
 * @author  Bartosz Baranowski 
 */
public interface BaseSession {

  /**
   * Returns the time when this session was created (milliseconds)
   * Start point of time January 1, 1970 GMT.
   * @return long specifying when this session was created
   */
  long getCreationTime();

  /**
   * Returns the last time an event occurred on this session (milliseconds)
   * Start point of time January 1, 1970 GMT.
   * @return long specifying when last time an event occurred on this session
   */
  long getLastAccessedTime();

  /**
   * Return true if session is not released
   * @return true if session is not released
   */
  boolean isValid();

  /**
   * Release all resources append to session
   */
  void release();

  /**
   * Indicates if this is an App Session or a raw/base session
   * @return
   */
  boolean isAppSession();

  /**
   * Indicates if the session is replicable
   * 
   * @return
   */
  boolean isReplicable();

  /**
   * @return session-id as String (Session-Id AVP)
   */
  String getSessionId();
}