uk.org.ogsadai.sessions.impl
Class ImplicitSessionStrategy

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

All Implemented Interfaces:

SessionStrategy

public class ImplicitSessionStrategy

extends java.lang.Object

implements SessionStrategy

A SessionStrategy that creates a new implicit session with default settings.

An implicit session is used when a request supplies no specific session settings. Implicit sessions are automatically cleaned-up as soon as the SessionParticipant no longer needs them. A SessionListener is attached to the session to achieve this.

Author:

The OGSA-DAI Project Team

Field Summary

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

Constructor Summary

ImplicitSessionStrategy()
Constructs a strategy for creating a new session with default settings.

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

Constructor Detail

ImplicitSessionStrategy

public ImplicitSessionStrategy()

Constructs a strategy for creating a new session with default settings.

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.