OneToMany relationships

[clebert.suconic]

I'm looking for a way to remove/add items on a list according to deployment/undeployment. It might be documented somewhere, but it wasn't obvious how to do it by looking at docs.

Example:

"You have a Bean Employee with Addresses. Employee will have add/remove methods for Address (addAddress(Address), removeAddress(Address))."

As soon as Address is deployed, Employee would know about its list of Addresses.

The simple way of doing this would be Adress to call Employee.add(this). But it would be better to do it automatically, so I don't need to trust users to do it.

Is there an example similar to this?


Thanks,

[alesj]

This is best explained with MainDeployer and Deployers example:

Instead of having each Deployer to call

<install bean="MainDeployer" method="addDeployer">
 <parameter>this</parameter>
</install>
<install bean="MainDeployer" method="removeDeployer">
 <parameter>this</parameter>
</install>

You can just add this:

<bean name="MainDeployer" ...>
 <incallback method="addDeployer"/>
 <uncallback method="removeDeployer"/>
</bean>

The callback idea is to check the type of method's parameter - in this case Deployer interface - and when a matching bean (by type --> instance of) is installed/uninstalled, you execute this callback.

So when a new Deployer bean is installed, it is automa(t|g)ically added to MainDeployer.

Exchange MainDeployer with Employee and Deployer with Address, and there you go. ;-)

All MC IoC xml elements have matching annotation support. In this case @Install/@Uninstall.

[clebert.suconic]

Sweet.. it worked without any problems!

something that useful should be on the main doc :-) This is much better than the Lifecycle callback example on the AOP chapter.

Thanks again

[alesj]

Sweet.. it worked without any problems!

;-)

something that useful should be on the main doc :-) This is much better than the Lifecycle callback example on the AOP chapter.

It's all already there:
- http://labs.jboss.com/files/jbossmc/docs/2.0.x/userGuide/ch13s02.html

[clebert.suconic]

It's all already there:
- http://labs.jboss.com/files/jbossmc/docs/2.0.x/userGuide/ch13s02.html

Duh! :-) Thanks a lot... I was so blink by looking at inject properties.