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orion server, servelet chaining

Peter Gragert
Ranch Hand

Joined: Jan 16, 2001
Posts: 424
We all doe excersises using the orion server, don't we?
I just became intreeged by servlet chaining:
On each page: Peter watches you!
Small at the end ...
Is that not a nice topic?
[ April 02, 2002: Message edited by: Peter Gragert ]
jason adam
Chicken Farmer ()
Ranch Hand

Joined: May 08, 2001
Posts: 1932
I've only used chaining for filtering. There is now a Filter interface that is supposed to replace this technique. I haven't used the interface yet, though.
Still, chaining is fun
Michael Pearson
Ranch Hand

Joined: Mar 11, 2001
Posts: 351
This is one area of Servlets I wish I had more exposure to.
I can envision a lot of neat ways to manipulate content input and system output.
FYI - I'm trying to use multiple J2EE servers as I go through the Drive. It's helpful as I develop my own code too. I have Tomcat, Orion, WebSphere and WebLogic on my laptop. There is a big difference between the front-end interfaces. It's kind of neat to see how each one tackles the same problems.
[ April 02, 2002: Message edited by: Michael Pearson ]
Pauline McNamara
Sheriff

Joined: Jan 19, 2001
Posts: 4012
    
    6
Ok, so what do you mean by chaining and filtering?
Peter Gragert
Ranch Hand

Joined: Jan 16, 2001
Posts: 424
To Pauline:
A request is sent to the server, a first servlet is called but you told the server to always, or dependent on a condition (mime-type), a second (or more) servlet should use the output of the foregoing one as input ==> chaining, and you call it filtering
if e.g. a servlet outputs a table in raw form
(e.g. start table of three columns with header,
the lines of a table, end table) and a follow up servlet adds the necessary html code such that the client browser renders the output as nice html -table. ...
Pauline McNamara
Sheriff

Joined: Jan 19, 2001
Posts: 4012
    
    6
Thanks Peter.
[ April 04, 2002: Message edited by: Pauline McNamara ]
Pauline McNamara
Sheriff

Joined: Jan 19, 2001
Posts: 4012
    
    6
Originally posted by Michael Pearson:
FYI - I'm trying to use multiple J2EE servers as I go through the Drive. It's helpful as I develop my own code too. I have Tomcat, Orion, WebSphere and WebLogic on my laptop. There is a big difference between the front-end interfaces. It's kind of neat to see how each one tackles the same problems.

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subject: orion server, servelet chaining