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From Ariel Araza <adar...@ayalasystems.com>
Subject Re: Declarative way of registering Event Listeners
Date Tue, 26 May 2009 12:25:11 GMT
Thanks Alex for the response.

Ariel

On May 26, 2009, at 8:19 PM, Alexander Klimetschek wrote:

> On Tue, May 26, 2009 at 2:03 AM, ASTI Araza, Ariel D.
> <ADAraza@ayalasystems.com> wrote:
>> I've been searching the Jackrabbit documentation and I couldn't  
>> find anything that answers my question. I am using the jackrabbit  
>> webapp and I don't want to subclass, or modify existing jackrabbit  
>> classes just to insert code that register my own event listener to  
>> observe repository changes like addition, modifications, removal,  
>> etc. In the WEB-INF/config.xml I saw <iomanager> and  
>> <propertymanager> registration but there's unfortunately not  
>> anything that looks like event listeners registration.
>
> No, there is no declarative way to do so, because it is part of the
> JCR API (iomanager and co. are Jackrabbit-specific extensions that
> have to be run at startup) and most importantly, it requires a
> session, which in turn requires you to log in with a certain user.
>
> How you do this depends on your application framework, because in most
> cases you want that eventlistener to be started in a long-running
> component (the session needs to stay open as long as you want to
> receive events). Then you "only" have to call
> session.getWorkspace().getObservationManager().registerEventListener
> [1].
>
> [1] http://day.com/maven/jsr170/javadocs/jcr-1.0/javax/jcr/observation/ObservationManager.html#addEventListener(javax.jcr.observation.EventListener,%20int,%20java.lang.String,%20boolean,%20java.lang.String

> [],%20java.lang.String[],%20boolean)
>
> Regards,
> Alex
>
> -- 
> Alexander Klimetschek
> alexander.klimetschek@day.com


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