Hi,
I'd like to register a listener and filter at application startup on a Cayenne
data domain (a non-Tapestry filter/listener). I need to add something like
these two lines somewhere:
runtime.getDataDomain().getEntityResolver().getCallbackRegistry().addListener(new
LastModifiedListener());
runtime.getDataDomain().addFilter(new ChangeSetFilter());
Since I use tapestry5-cayenne there's no easy way to do this, because I just
add the dependency in my pom and then inject the cayenne object context (or
data context). I never do something like
ServerRuntime runtime = new ServerRuntime("cayenne.xml"); ......
In the TapestryCayenneModule there's a ObjectContextProvider service with a
private field runtime. I tried to override this service and add my two lines
but got a conflict because in TapestryCayenneModule.java the service is not
only bound but also overridden.
Then I tried to inject this service into my startup method and access the
DataDomain object via the ObjectContext returned by a method of the service.
But nothing worked. I guess it's too early, the service isn't available yet.
The actual exception was
Registry Error invoking service contribution method
de.myapp.services.AppModule.registerCayenneFilterAndListener(): Unable to
delegate method invocation to property 'request' of <Proxy
for RequestGlobals(org.apache.tapestry5.services.RequestGlobals)>, because the
property is null.
I also tried a method with @Startup and
ServerRuntime runtime = new ServerRuntime("cayenne.xml"); ......
but then the data domain in the TapestryCayenneModule doesn't know about any
listener or filter.
So is there any way to access a field of a service from another module on
startup?
Or is there something like the @Startup annotation but at a later point of
time, after the services are available?
Initially I asked on the cayenne mailing list
http://mail-archives.apache.org/mod_mbox/cayenne-user/201211.mbox/%[email protected]%3E
but then it became more of a tapestry question.
Cheers,
-bjello
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