The session object is the same across all the requests (for example, many browser
instances) from the same client. So, we need to synchronize the code to do any
changes to the session object.
Bo Xu wrote:
> Marc Krisjanous wrote:
>
> > Hi all,
> > I have seen the following code in some examples (reduced for email):
> >
> > doGet(request,response){
> >
> > performTask(request,response);
> >
> > }
> >
> > performTask(request,response){
> >
> > HttpSession thisSession = request.getSession(true);
> >
> > synchronized(thisSession){
> > try{
> >
> > thisSession.removeValue(HPDFv2CONSTANTS.RESULT_BEAN);
> >
> > }catch(Exception e){};
> >
> > }//end sync call
> >
> > }
> >
> > Now... I believe that we do not need to synchronized the session object
> > since every request is a sperate thread which contains its own request and
> > response object. Thus a separate instance of the request object which means
> > a separate instance of the session object. The individual thread will be
> > the only one accessing the session object. We do not need to protect the
> > call to the session object.
> >
> > Is this correct??
> >
> > Best Regards
> >
> > Marc
> > [...]
>
> Hi :-) IMO, I agree with you:
>
> now in the method *performTask(request,response)*,
> request, response and thisSession are all local fields,
> only one thread will use these local fields and the code in
> this method, so:
> # we can use them to lock some code, but perhaps we will not get
> any benifit.
> # we don't need to lock those code, because only one thread will
> use it.
>
> Bo
> Nov.21, 2000
>
> ___________________________________________________________________________
> To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
> of the message "signoff SERVLET-INTEREST".
>
> Archives: http://archives.java.sun.com/archives/servlet-interest.html
> Resources: http://java.sun.com/products/servlet/external-resources.html
> LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
___________________________________________________________________________
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff SERVLET-INTEREST".
Archives: http://archives.java.sun.com/archives/servlet-interest.html
Resources: http://java.sun.com/products/servlet/external-resources.html
LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
