Re: Session listener

2003-03-10 Thread SKarthikeyan 
Hi...
 
Can please let me know how to set my container to register the implementing class to 
creeive the events.
 
Let me knoe how to do it in  Weblogic7.0  java-web-server
 
regards
 
S.Karthikeyan

-Original Message- 
From: Partha Ranjan Das [mailto:[EMAIL PROTECTED] 
Sent: Mon 3/10/2003 12:28 PM 
To: [EMAIL PROTECTED] 
Cc: 
Subject: Re: Session listener



You can use the HttpSessionListener interface. In case the session is
invalidated or canceled otherwise, the code to reinstate the db can be done
inside the method sessionDestroyed(). Remember you need to set your
conteiner to register the implementing class to receive the events.

Regards,
Partha

-Original Message-
From: Peter Dolukhanov [mailto:[EMAIL PROTECTED]
Sent: Saturday, March 08, 2003 7:09 PM
To: [EMAIL PROTECTED]
Subject: Session listener


Dear All,

I'm fairly sure this has been mentioned previously, but I cannot find
any discussion in the archives.

The site I am developing has a standard shopping cart object implemented
within a session object. Whenever a user adds an item to his shopping
cart, it is temporarily removed from the main stock database to ensure
that when the user checks out, that item will be available to them.

However, for obvious reasons I need to keep a track on this session
object, so either when the user closes his browser or the session times
out, I need to reinstate the items back to the original database.

Therefore, is there any available resource to keep a track on a session
object, ideally a listener that will implement some given action at the
end of a session object?

Many thanks,
Peter Dolukhanov

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Re: Session listener

2003-03-09 Thread Partha Ranjan Das 
You can use the HttpSessionListener interface. In case the session is
invalidated or canceled otherwise, the code to reinstate the db can be done
inside the method sessionDestroyed(). Remember you need to set your
conteiner to register the implementing class to receive the events.

Regards,
Partha

-Original Message-
From: Peter Dolukhanov [mailto:[EMAIL PROTECTED]
Sent: Saturday, March 08, 2003 7:09 PM
To: [EMAIL PROTECTED]
Subject: Session listener


Dear All,

I'm fairly sure this has been mentioned previously, but I cannot find
any discussion in the archives.

The site I am developing has a standard shopping cart object implemented
within a session object. Whenever a user adds an item to his shopping
cart, it is temporarily removed from the main stock database to ensure
that when the user checks out, that item will be available to them.

However, for obvious reasons I need to keep a track on this session
object, so either when the user closes his browser or the session times
out, I need to reinstate the items back to the original database.

Therefore, is there any available resource to keep a track on a session
object, ideally a listener that will implement some given action at the
end of a session object?

Many thanks,
Peter Dolukhanov

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Re: Session listener

2003-03-08 Thread Martin Gainty 

2 methods
1)put it into the Database but dont commit it until you log out (of the sesssion)2)dont put it into the DB until you are absolutely positively sure you want it in there(when you logout of the session)Makes Sense?









Martin Gainty



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From: Peter Dolukhanov <[EMAIL PROTECTED]>
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Subject: Session listener
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Dear All,

I'm fairly sure this has been mentioned previously, but I cannot find
any discussion in the archives.

The site I am developing has a standard shopping cart object implemented
within a session object. Whenever a user adds an item to his shopping
cart, it is temporarily removed from the main stock database to ensure
that when the user checks out, that item will be available to them.

However, for obvious reasons I need to keep a track on this session
object, so either when the user closes his browser or the session times
out, I need to reinstate the items back to the original database.

Therefore, is there any available resource to keep a track on a session
object, ideally a listener that will implement some given action at the
end of a session object?

Many thanks,
Peter Dolukhanov

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Re: Session Listener

2001-05-24 Thread Hans Bergsten 

Sylvain Roche wrote:

 Hi,

 I'm working on an online mail application. Everything works fine, but I
 have an architectural problem with attachements. In order to read them form
 the web page showing the message, I have to record them on the application
 server (from the mail server). Then the user can download or read them. No
 problem.

 Then I add sessions, as I want multiple users to read their mails
 simultanously. Each session creates its own directory on the server, to
 save its attachements.

 How can I delete the directory when a session has expired. I suppose this
 has to do with HttpSessionBindingListener, but I cannot figure how to use
 this with a directory, ie not an object in memory. Another way could be to
 implement a detroy method in a bean, which erases the directory linked to
 it when destroyed.

 Am I on a totaly wrong way ?

No, you're on the right track :-) You can create an instance of a class
that implements the HttpSessionBindingListener interface and give it
the directory name, e.g. a bean with a setDirName() method, and place
this object in the session. When the session is terminated, either by
an explicit call to invalidate() from the logic behind a logout page
or due to a timeout, the HttpSessionBindingListener valueUnbound() method
that you implemented in your bean is called by the container. In this
method you can get use the directory name given to the bean and remove
the directory using the standard Java File class methods.

plug
I describe more about how to use HttpSessionBindingListener objects
in chapter 15 of my JavaServer Pages book (O'Reilly):

  http://TheJSPBook.com/

/plug

Hans
--
Hans Bergsten   [EMAIL PROTECTED]
Gefion Software http://www.gefionsoftware.com
Author of JavaServer Pages (O'Reilly), http://TheJSPBook.com

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Re: Session listener redirect

2001-03-06 Thread OK Prakasan 

When the user successfully logs in u can put a value on sesion object.
for e,g session.putValue("UserId",id of user)
then on each page first check whether session.getValue("UserId") is
null and if null
redirect user to login page.




Ron Quartel [EMAIL PROTECTED]@java.sun.com on 03/06/2001
05:09:17 PM

Please respond to A mailing list about Java Server Pages specification
  and reference [EMAIL PROTECTED]

Sent by:  A mailing list about Java Server Pages specification and
  reference [EMAIL PROTECTED]


To:   [EMAIL PROTECTED]
cc:
Subject:  Session listener redirect


I have created the following session listener class which works but
now I
want to redirect the client to the start page of the application
(index.jsp)
if they are trying to enter the application from another page.

Easy peasy lemon squeezey in asp using global.asa but at a loss with
java.

Any help greatly appreciated.

Code shown below.

Ron Quartel.



import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class SessionListener implements HttpSessionListener{

public SessionListener() {
}

public void sessionCreated(HttpSessionEvent hse) {
System.out.println("Session started");
//redirect to start page if not alread there i.e index.jsp.
}

public void sessionDestroyed(HttpSessionEvent hse) {}

}

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Re: Session listener redirect

2001-03-06 Thread Sripada Srinivas 

Can you not use  response.sendRedirect("index.jsp")??

If you can manage to get the handle for the HttpServletResponse object??

or else, you can include this code in JSP page to get the handle to it.

I am not sure I got your problem correct.

Regards,
Sripada


Ron Quartel wrote:

 I have created the following session listener class which works but now I
 want to redirect the client to the start page of the application (index.jsp)
 if they are trying to enter the application from another page.

 Easy peasy lemon squeezey in asp using global.asa but at a loss with java.

 Any help greatly appreciated.

 Code shown below.

 Ron Quartel.

 import java.util.*;
 import javax.servlet.*;
 import javax.servlet.http.*;

 public class SessionListener implements HttpSessionListener{

 public SessionListener() {
 }

 public void sessionCreated(HttpSessionEvent hse) {
 System.out.println("Session started");
 //redirect to start page if not alread there i.e index.jsp.
 }

 public void sessionDestroyed(HttpSessionEvent hse) {}

 }

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