Re: [xmlblaster] multiple callbacks #2

[Marcel Ruff <ruff at swand.lake.de>]

Wolfgang Kleinertz wrote:

> Hi!
>
> Just a little question:
> Is it possible to have a callback for each subscibtion and not just one
> for per client?
>
> I know that it was impossible in earlier version ...
Possibly i understood your question wrong,
here is another answer:

If you want to dispatch the subscription to your client java class
which can handle it, this feature is implemented already,
for example:

XmlBlasterConnection con = ...   // login etc.
  ...
SubscribeKeyWrapper key = new SubscribeKeyWrapper("//stock", "XPATH");
SubscribeQosWrapper qos = new SubscribeQosWrapper();
try {
  con.subscribe(key.toXml(), qos.toXml(), new I_Callback() {
     public void update(String name, UpdateKey updateKey, byte[] 
content, UpdateQoS updateQoS) {
        System.out.println("Receiving message for '//stock' 
subscription ...");
      }
    });
} catch(XmlBlasterException e) {
 System.out.println(e.reason);
}
 

You can pass your own specialized I_Callback handling class for each 
subscribe.
So you don't need to dispatch incoming messages in a central update()
implementation with ugly switch() case coding.


Marcel