uk.org.ogsadai.sessions.impl
Class TerminateSessionStrategy

java.lang.Object
  |
  +--uk.org.ogsadai.sessions.impl.TerminateSessionStrategy

All Implemented Interfaces:

SessionStrategy

public class TerminateSessionStrategy

extends java.lang.Object

implements SessionStrategy

A SessionStrategy that retrieves an existing Session from a SessionManager and terminates that session immediately after the last session participant leaves the session.

Author:

The OGSA-DAI Project Team

Field Summary

private static java.lang.String	COPYRIGHT_NOTICE
private static DAILogger	LOG
private SessionID	mSessionID

Constructor Summary

TerminateSessionStrategy(SessionID sessionID)
Creates a new strategy to access the specified existing session.

Method Summary

(package private) SessionListener	createSessionListener(SessionManager manager) Creates a SessionListener that will automatically terminate the session when the last session participant leaves.
InternalSession	obtainSession(SessionManager manager) Uses the session manager to create a new session or access an existing session, depending on the session requirements built into the strategy.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COPYRIGHT_NOTICE

private static final java.lang.String COPYRIGHT_NOTICE

See Also:

Constant Field Values

LOG

private static final DAILogger LOG

mSessionID

private final SessionID mSessionID

Constructor Detail

TerminateSessionStrategy

public TerminateSessionStrategy(SessionID sessionID)

Creates a new strategy to access the specified existing session.

Parameters:

sessionID - The identifier for the pre-existing session to be obtained.

Throws:

java.lang.IllegalArgumentException - if the argument is null.

Method Detail

obtainSession

public InternalSession obtainSession(SessionManager manager)
                              throws SessionCreationException,
                                     SessionLookupException,
                                     SessionNotFoundException

Description copied from interface: SessionStrategy

Uses the session manager to create a new session or access an existing session, depending on the session requirements built into the strategy.

An implementation of this method should also take necessary measures to ensure that the session ends at the appropriate point, such as after a certain time has passed.

Specified by:

obtainSession in interface SessionStrategy

Parameters:

manager - The SessionManagement to use for interactions.

Returns:

A SessionAccess object to the session thus obtained.

Throws:

SessionNotFoundException - if a specific named session does not exist.

SessionCreationException - if some problem arises when creating a new session.

SessionLookupException - if some problem arises when accessing an existing session.

createSessionListener

SessionListener createSessionListener(SessionManager manager)

Creates a SessionListener that will automatically terminate the session when the last session participant leaves.

This method is given package level accessiblity for testing purposes.

Parameters:

manager - SessionManager managing session.

Returns:

SessionListener.