[jboss-dev] On demand JCA and JTA for the web-profile

[Carlo de Wolf]

Finally you're entering the JNDI ring. :-)

An object factory must have a no-argument public constructor, because 
it's constructed by the naming server. So you can't have a controller as 
a field in there.

Carlo

Adrian Brock wrote:
> Related to this, where's the best place to put a generic on-demand
> jndi ObjectFactory? 
>
> Is this something that should go in the naming project?
>
> i.e. something like the following pseudo code:
>
> private Controller controller;
>
> private String contextName;
>
> public class OnDemandObjectFactory implements ObjectFactory
> {
>
> public Object getObjectInstance(Object obj, Name name, 
>     Context nameCtx, Hashtable<?,?> environment) throws Exception
> {
>    ControllerContext context = controller.getContext(contextName);
>    if (context == null)
>       throw new RuntimeException("No such context: " + contextName);
>    
>    // Not started so bootstrap it
>    if (ControllerState.INSTALLED.equals(context.getState()) == false)
>    {
>       controller.changeState(contextName, ControllerState.INSTALLED);
>       if (ControllerState.INSTALLED.equals(context.getState()) == false)
>          throw new RuntimeException("Could not install context: " +
> contextName);
>    }
>    
>    return context.getTarget();
> }
> }
>
> On Thu, 2008-11-13 at 16:14 +0100, Adrian Brock wrote:
>   
>> See:
>> http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4189122#4189122
>>
>> This will be the first real use of the "new" on-demand processing.
>>
>> The idea is that unless the webapp looks up a user transaction
>> or transaction synchronization registry  (there's a sticking point
>> there) or the admin deploys a transactional datasource, 
>> then jca and jta won't bootstrap by default.
>>
>> This won't effect the other configurations since we always provide
>> a transactional datasource out-of-the-box for jms persistence
>> and other services reference the transaction manager anyway
>> so they will always bootstrap.
>>