Does WebStart support sessions?

[Strannik]

Does WebStart support sessions?

I build request to servlet using URL connection. When servlet processes request it creates some internal data and put it into HttpServletRequest object, for example:

request.getSession(true).setAttribute(SERVLET_ID,String.valueOf(id));

But I notice that the next time servlet processes request the value of SERVLET_ID attribute is null.
When I used applet/servlet communication it didn't occur. What is the problem ??

 

[sedj]

Neither Webstart nor applets support HttpSession objects- because an HttpSession object is created by the servlet container (ie tomcat).

 

[Strannik]

OK.

So when I make request to servlet(through WebStart) it creates new session each time ?

 

[sedj]

The rules for tomcat allocating NEW sessions are :

- If browser cookies are enabled, if there is no cookie named JSESSIONID present.
- If cookies are disabled, the container rewrites a URL of the form :

http://www.server.com/resource;JSESSIONID=abc123.

If the JSESSIONID part is not present, a new session is allocated.

Some browsers or programs that connect to a web resource (ie a program running in webstart) do not understand how to accept either cookies, or URL rewriting - and hence the servlet container will think a new session should be allocated. Which I am guessing is your problem ...

 

[Strannik]

OK. Thanks
I had to implement my own "sessions" ...