Re: [ecf-dev] How could I setup DistributedEventAdmin using DS ?

[Scott Lewis <slewis@xxxxxxxxxxxxx>]

Hi Cristiano,


On 8/10/2011 5:57 AM, Cristiano Gavião wrote:
> On 09/08/11 12:00, Scott Lewis wrote:
> > Hi Christiano,
> Hi Scott,
> > On 8/9/2011 5:46 AM, Cristiano Gavião wrote:
> > > Hi guys,
> > >
> > > Could someone point me how could I setup DistributedEventAdmin using 
> > > DS ?
> >
> > No example currently exists.  Since some of the DistributedEventAdmin 
> > setup currently requires java code it would involve some combination 
> > of DS markup and java code.
> So let me dig into this :)
> I'm creating a example based on hello... If you wanted I could sent 
> you after I've done the challenge... but I need some directions here...
>
> I know now that I can't use DistributedEventAdmin as DS component 
> because it doesn't have a default constructor...
>
> Reading event example, I conclude that I need to get a reference to 
> IContainerManager, get the ID of the container, then get the 
> IContainer, adapt it to ISharedObjectContainer and then add the 
> DistributedEventAdmin object on it. Am I right?

Yes...that's essentially right.   It might be better to create the 
container rather than 'get the ID of the container', but still what you 
have outlined is fine.


> I could get the reference of IContainerManager using DS, but 
> containerManager.getAllContainers() shows me any container... and I 
> don't know how to create the ID of container either...

Well, like I said it might be better to create the container (and it's 
ID).  OTOH, it's also possible to create (and optionally connect) the 
container outside the scope of the service component, and then just 
retrieve the container from the container factory.


> So I couldn't figure out a way to get a reference to IContainer in the 
> activate method of HelloComponent...  could you give a tip how do that?

You can create a container with the containerFactory (accessible via the 
IContainerManager)...e.g.

IContainer newContainer = 
containerManager.getContainerFactory().createContainer('ecf.generic.server');

and/or create and connect a

For another purpose, I have done this previously...i.e. used a ds 
service component to expose the EventAdmin service, and have the 
component's activation result in the creation of a container, the 
addition of a DistributedEventAdmin instance to that container...that's 
then used by the service component to send/post events.

Just FYI....I'm going to be away from Internet access for a couple of 
days...so although I'm happy to discuss further, it will be next week.

Scott