session.removeAttribute and session.invalidate

[JiaPei Jen]

I pass a scoped object from one JSP #1 to JSP #2 in a session.

In JSP #1, I did:

       <c:set var="cr" value="${articleForm.creator}" scope="session"/>

In JSP #2, I did:

      <bean:define id="author" name="cr" scope="session" type="java.lang.String"/>
      <html:text property="receiver" value="<%=author%>" size="82" maxlength="25" tabindex="1"/>

Immediately after I output the value, I want to remove the object from the session. I have two questions:
1. which one of the following should I do:

       session.removeAttribute( "cr" );

or

       session.removerAttribute( "author" );

or

       session.removeAttribute( "receiver" );

2. Do I have to invalidate the session; i.e. session.invalidate(); after all the objects in the session are removed?

[ July 06, 2004: Message edited by: JiaPei Jen ]
[ July 06, 2004: Message edited by: JiaPei Jen ]

[Atul Prabhu]

Hi,

You would have to use session.removeAttribute( "cr" ), session.removeAttribute( "author" ) cannot be used because "author" is available in page scope.
session.removeAttribute( "reciever" ) cannot be used because "reciver" would be in the request scope after the form is submitted.

Why would u have to use session.invalidate()

Hope this solves ur problem.

Regards
Atul

[William Brogden]

2. Do I have to invalidate the session; i.e. session.invalidate(); after all the objects in the session are removed?

A single call to session.invalidate() will automatically remove all attached references. Of course you won't be able to use that session at all after that call - you will get an IllegalStateException.
Bill