RE: Question about sessions

2001-02-16 Thread George McKInney 

> -Original Message-
> From: A Yang [mailto:[EMAIL PROTECTED]]
> Sent: Friday, February 16, 2001 3:05 PM
> To: [EMAIL PROTECTED]
> Subject: Question about sessions
>
>
> If I instantiate a javabean from a JSP:
>
>  scope="session">
> 
> 
>
> and hand off control to a servlet where I retrieve the
> session using:
>
> HttpSession session = req.getSession(false);
>
> Shouldn't session.isNew() return "false" because the
> session already exists?
>

I don't think so, IF the client hasn't yet seen the session. I think it only
returns false if the request includes the session ID, which it won't until
there has been a round-trip back to the client.

George McKinney, Developer
tantalus communications inc.
500-1122 Mainland Street
Vancouver, BC, Canada V6B 5L1
[EMAIL PROTECTED]

Direct  604.726.6753
Main604.609.0700
Fax 604.609.0705
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"When eBusiness experience counts."



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Re: Question about sessions

2001-02-16 Thread Craig R. McClanahan 

A Yang wrote:

> If I instantiate a javabean from a JSP:
>
>  scope="session">
> 
> 
>
> and hand off control to a servlet where I retrieve the
> session using:
>
> HttpSession session = req.getSession(false);
>
> Shouldn't session.isNew() return "false" because the
> session already exists?
>

It depends on how you do your handoff.

If you use  (or RequestDIspatcher.forward()) in the context
of the same request, the client does not know about it yet.  No response
containing the session ID (as a cookie or a rewritten hyperlink) has ever
been transmitted, and the client has never said "i am part of session
XYZ", so by definition the session is still considered "new".

If you use a sendRedirect(), or wait for a subsequent request, the
servlet container will see that the session is already in existence and
isNew will be false.  Among other things, this means that the client has
positively acknowledged that they are participating in this session (by
returning the session ID on the subsequent request).

>
> Thanks and regards,
> Andy
>

Craig McClanahan


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Question about sessions

2001-02-16 Thread A Yang 

If I instantiate a javabean from a JSP: 





and hand off control to a servlet where I retrieve the
session using:

HttpSession session = req.getSession(false);

Shouldn't session.isNew() return "false" because the
session already exists?

Thanks and regards,
Andy



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Re: Question about sessions..

2001-01-26 Thread John Clark L. Naldoza 

Matt Goss wrote:
> 
> John,
> the getSession(false) only returns a session if it is not a new one (ie
> if request is from another page inside the application). getSession(true)
> always returns a session.
> Matt Goss
> 
> "John Clark L. Naldoza" wrote:
> 


Thanks Matt,


I am using getSession(false), but I still get a session even when it is
my first time accessing the browser...

i.e.

if( getSession(false) == null )
{
   System.out.println( No Session );
}
else
{
System.out.println( "Has a session" );
}

Mine would print out has a session...;-(

are there any extra settings in the server.xml or web.xml that I should
know about?

Thanks in advance..


-- 
 /) John Clark Naldoza y Lopez   (\
/ )Software Design Engineer II   ( \
  _( (__  Web-Application Development_) )_
 (((\ \>  /_>Cable Modem Network Management System <_\

Re: Question about sessions..

2001-01-26 Thread Matt Goss 

John,
the getSession(false) only returns a session if it is not a new one (ie
if request is from another page inside the application). getSession(true)
always returns a session.
Matt Goss

"John Clark L. Naldoza" wrote:

> Hello All,
>
> Why is it that I am getting a session, even though I have set call
> getSesssion(false) and it is the first time that my browser has
> accessed it...
>
> I'm using Tomcat 3.2.1 under Linux 2.2.17
>
> I have set the following in the web.xml
>
> 
> 
> 0
> 
> 
>
> Any help, pointer or ever RTFMs would be appreciated (I hope the URLs
> are in order though..;-)
>
> Thanks in advance.
>
> Cheers,
>
> John Clark
> --
>  /) John Clark Naldoza y Lopez   (\
> / )Software Design Engineer II   ( \
>   _( (__  Web-Application Development_) )_
>  (((\ \>  /_>Cable Modem Network Management System <_\( \_/ / NEC Telecom Software Phils., Inc.  \ \_/ )
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Question about sessions..

2001-01-26 Thread John Clark L. Naldoza 

Hello All,

Why is it that I am getting a session, even though I have set call 
getSesssion(false) and it is the first time that my browser has 
accessed it...

I'm using Tomcat 3.2.1 under Linux 2.2.17

I have set the following in the web.xml



0



Any help, pointer or ever RTFMs would be appreciated (I hope the URLs
are in order though..;-)

Thanks in advance.


Cheers,


John Clark
-- 
 /) John Clark Naldoza y Lopez   (\
/ )Software Design Engineer II   ( \
  _( (__  Web-Application Development_) )_
 (((\ \>  /_>Cable Modem Network Management System <_\