org.objectweb.jac.aspects.session
Class SessionWrapper

java.lang.Object
  |
  +--org.objectweb.jac.core.Wrapper
        |
        +--org.objectweb.jac.aspects.session.SessionWrapper

All Implemented Interfaces:

Advice, ConstructorInterceptor, Interceptor, MethodInterceptor, Serializable

public class SessionWrapper

extends Wrapper

This wrapper handles the session for each object within the JAC system.

Author:

Renaud Pawlak

See Also:

handleSession(Interaction), Serialized Form

Field Summary

protected static Hashtable	applications Stores the applications (sid -> applicationName)
protected static Hashtable	sessions Stores the sessions and their contextual attributes (sid -> saved attributes).

Fields inherited from class org.objectweb.jac.core.Wrapper

ac, cr

Constructor Summary

SessionWrapper(AspectComponent ac)

Method Summary

void	clearCurrentSessionAttribute(String name) Removes a session attribute.
Object	construct(ConstructorInvocation invocation)
Object	handleSession(Interaction interaction) Handles sessions for the wrapped method.
Object	invoke(MethodInvocation invocation)

Methods inherited from class org.objectweb.jac.core.Wrapper

attr, attrdef, defines, getAspectComponent, getAspectComponentName, getExceptionHandlers, proceed, toString

Methods inherited from class java.lang.Object

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

Field Detail

sessions

protected static Hashtable sessions

Stores the sessions and their contextual attributes (sid -> saved attributes).

applications

protected static Hashtable applications

Stores the applications (sid -> applicationName)

Constructor Detail

SessionWrapper

public SessionWrapper(AspectComponent ac)

Method Detail

clearCurrentSessionAttribute

public void clearCurrentSessionAttribute(String name)

Removes a session attribute.

The given attribute will be forgotten for the current interaction and for all the forthcoming interactions of the same session. This can be used for instance to log-out a user.

Parameters:

name - the name of the attribute to forget

handleSession

public Object handleSession(Interaction interaction)

Handles sessions for the wrapped method.

The session handling algorithm is:

• if the session id - attr("Session.sid") - is not defined, do nothing
• try to restore the saved context attributes for this session id if already saved
• else save them into the sessions field

Returns:

the wrapped method return value

invoke

public Object invoke(MethodInvocation invocation)
              throws Throwable

Specified by:

invoke in interface MethodInterceptor

Overrides:

invoke in class Wrapper

Throwable

construct

public Object construct(ConstructorInvocation invocation)
                 throws Throwable

Specified by:

construct in interface ConstructorInterceptor

Overrides:

construct in class Wrapper

Throwable