[jbossts-issues] [JBoss JIRA] (JBTM-3106) Firing an @Initialized(TransactionScoped.class) event

[Ondra Chaloupka (Jira)]

Ondra Chaloupka created JBTM-3106:
-------------------------------------

             Summary: Firing an @Initialized(TransactionScoped.class) event
                 Key: JBTM-3106
                 URL: https://issues.jboss.org/browse/JBTM-3106
             Project: JBoss Transaction Manager
          Issue Type: Enhancement
          Components: JTA
    Affects Versions: 5.9.2.Final
            Reporter: Ondra Chaloupka
            Assignee: Laird Nelson


It would be beneficial to have the CDI-specific wrapper around Narayana's TransactionManagerImple that fires an @Initialized(TransactionScoped.class)-qualified event.

For the CDI, it's a good practice. The all built-in scopes have to provide this behaviour.
 

The CDI specification says (in section 6.7):

{quote}
Portable extensions are encouraged to synchronously fire:
* an event with qualifier @Initialized(X.class) when a custom context is initialized, i.e. ready for use,
* an event with qualifier @BeforeDestroyed(X.class) when a custom context is about to be destroyed, i.e. before the actual destruction,
* an event with qualifier @Destroyed(X.class) when a custom context is destroyed, i.e. after the actual destruction,

where X is the scope type associated with the context.

A suitable event payload should be chosen.
{quote}
 
The {{begin()}} method a Narayana-supplied but CDI-specific transaction manager wrapping Narayana's "ordinary" one should do:

{code}
@Inject
@Initialized(TransactionScoped.class)
private Event<Transaction> initializationBroadcaster;

@Inject @BeforeDestroyed(TransactionScoped.class)
private Event<Transaction> beforeDestructionBroadcaster;

@Inject @Destroyed(TransactionScoped.class)
private Event<TransactionManager> destructionBroadcaster;

// in its begin() method:
super.begin();
initializationBroadcaster.fire(this.getTransaction());

// in its commit() and rollback() methods and anywhere else I'm forgetting: 
beforeDestructionBroadcaster.fire(this.getTransaction());
super.commit(); // or rollback or whatever
destructionBroadcaster.fire(this);
{code}



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