[Apache Web Services Wiki] New: FrontPage/Axis/SessionSupport

   Date: 2005-01-11T18:12:12
   Editor: ToshiyukiKimura
   Wiki: Apache Web Services Wiki
   Page: FrontPage/Axis/SessionSupport
   URL: http://wiki.apache.org/ws/FrontPage/Axis/SessionSupport

   Importing old wiki ...

New Page:

##language:en
'''Q: So does Axis support sessions?'''

A: Yes. We have a session abstraction which allows an extensible set of 
underlying implementations - take a look at the class 
org.apache.axis.session.Session for details. In particular, we currently 
support sessions based on HTTP cookies and also transport-independent sessions 
based on SOAP headers. It is up to some handler on the request chain to set up 
an appropriate Session implementation and attach it to the {{{ MessageContext 
}}} with {{{ MessageContext.setSession() }}} so that anyone who wants to use 
session semantics can get at it. 

'''Q: Cool, SOAP header-based sessions? How do I make that work?'''

A: There is a Handler class called "org.apache.axis.handlers. {{{ 
SimpleSessionHandler }}}" which implements this functionality. You need to 
include this handler in the request and response flows of both your client and 
your server. Take a look at our session test ({{{ 
test.session.TestSimpleSession }}}) for an example. Regarding use in clients, 
look at [http://wiki.apache.org/old/AxisProjectPages_2fAxisClientConfiguration 
AxisClientConfiguration]. 

'''Q: What else can I do with sessions?'''

A: Any time after the session context has been established, calling 
getSession() on the current messageContext will obtain you a reference to a 
Session object. You may use this object like a Hashtable to store arbitrary 
data associated with this Session. For instance, on one request you might 
extract the caller's name and address from a database (an expensive operation), 
and then cache them in the Session object for fast access on subsequent 
invocations from the same caller. This functionality can be used either by 
custom Handlers or by your backend service object itself.