Hi,
I ended up making listeners deployed from assembly.xml and can include
configuration from config.xml like blocks. Any objections?
On Fri, 21 Sep 2001 01:43, Peter Donald wrote:
> Hi,
>
> I have committed partial support for Applications to add in BlockListeners
> that get notified when blocks are added/removed from application. Currently
> you can't actually use it as the assembly descriptor format needs to be
> expanded to allow applications to add in listeners.
>
> The BlockEvent contains information including
> * block name
> * block info object
> * actual block instance
>
> The reason for adding this listener to the Phoenix API is to allow the
> following scenario. Say we have a listener that does the following. Every
> time a block is added it searches the services the block exports and looks
> for a service that extends "WebService" interface. If it finds such a
> service exported by a block and it *also* finds another block that exports
> WebServices (like Pauls recent Soapification efforts that export SOAP
> WebServices) then it will register all the WebService objects with the
> exporter.
>
> So thus to export a Block as a web service you just have to implement an
> interface that extends WebService, add this listener to application and ...
> voila` ! It gets exported. The equivelent could be implemented for JMX,
> RMI, JNDI or any other passive application-wide service. This will
> hopefully make it much easier to add management into Avalon and we can do
> it in Application rather than Kernel space - yay!
>
> Hopefully this will solve all the issues of cooperation between "peer"
> blocks that I have talked about in the past. So what do you think ?
>
> Open Questions:
> * Do you like it?
> * Should Listeners be Configurable?
> * Where/how should we setup listeners for deployment? (I am thinking
> assembly.xml at this stage)
> * Is there any other information that may potentially be needed by
> listeners? * Is there any other events that we should have listeners for?
> * anything else?
>
> Okay _ I think I have hacked enough for my day off - nite ;)
--
Cheers,
Pete
*------------------------------------------------------*
| "Common sense is the collection of prejudices |
| acquired by age 18. " -Albert Einstein |
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