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From: Andrus Adamchik <andrus@objectstyle.org>
Subject: Re: Lifecycle Callback
Date: Sun, 29 Oct 2006 18:45:38 -0500
To: cayenne-dev@incubator.apache.org

Hi Adrian,

Your code is right, but an extra setup is needed - DataContext needs  
to be decorated in two callback interceptors. I haven't documented it  
yet, as we still need to come up with a more transparent procedure.  
But here is how I am doing it in my apps:


DataDomain dataDomain = configuration.getDomain("sobf");

// build interceptor sitting between DD and DC - one interceptor can  
be shared by multiple DataContexts.
DataChannel postInterceptor = new DataChannelCallbackInterceptor();
postInterceptor.setChannel(domain);


// do this for every ObjectContext used by the application:
// build DC
ObjectStore objectStore = new ObjectStore 
(dataDomain.getSharedSnapshotCache());
DataContext dataContext = new DataContext(postInterceptor, objectStore);

// build interceptor ObjectContext used by the application
ObjectContextCallbackInterceptor preInterceptor = new  
ObjectContextCallbackInterceptor();
preInterceptor.setContext(new DataContext(postInterceptor,  
objectStore));

ObjectContext appContext = preInterceptor;

Note that "appContext" is what your application should be using.

Andrus


On Oct 15, 2006, at 12:03 PM, Adrian Wiesmann wrote:
> Hello list
>
> I am in the process to migrate my project to Cayenne 3 and doing so I
> would like to use the Lifecycle Callbacks. My problem with them is,  
> that
> I can't make them to work.
>
> I am using cayenne-generic-3.0-incubating-SNAPSHOT from 14. 10. 2006.
>
> In the sourcecode I am doing this:
>
> Configuration.initializeSharedConfiguration();
> configuration = Configuration.getSharedConfiguration();
> 			
> dataDomain = configuration.getDomain("sobf");
> 			
> EntityResolver er = dataDomain.getEntityResolver();
> 			
> LifecycleEventCallbackMap cbPrePersist =
> er.getCallbacks(LifecycleEventCallback.PRE_PERSIST );		
> cbPrePersist.addListener( CDBCommon.class, "prePersist" );		
> cbPrePersist.addListener( CThreatAgent.class, "prePersist" );
>
> I have the same sourcecode (last 3 lines) for all of the 7 callback
> events.
>
> But neither the CThreatAgent nor the CDBCommon class get's called.  
> Neither
> when I am creating a new DBObject, nor when I am commiting my  
> changes to
> the DataContext.
>
> What am I missing or doing wrong?
>
> Thanks,
> Adrian
>