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https://issues.apache.org/jira/browse/ARIES-413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12912894#action_12912894
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Timothy Ward commented on ARIES-413:
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Hi Bengt,
The current solution will work with any construction mechanism (factory or
otherwise) because they all use the <argument> syntax.
As for your initialisation question. Qualities of service, such as transations,
can only be applied by the blueprint contianer when the thread of invocation
crosses a boundary between beans as this is the point at which we can detect
the program flow and start the transaction. Making an internal bean invocation
doesn't breach the bean boundary and so we can't apply any transaction
semantics. If you want to get the transaction behaviour you're after you will
need to invoke the method from another bean.
Using a factory method to try and get around this won't work either, as you
still don't have access to the managed bean instance yet. The instance you have
is a raw POJO, and doesn't contain any of the wrapper layers or inteception
logic. The only time you can call the initialise method and get a transaction
started is to be injected with the bean instance, or to get the bean instance
from the BlueprintContainer service.
There is no ordering between the transaction tag and the context tag in your
example, they are entirely independent.
> Injecting an entity manager using factory method
> ------------------------------------------------
>
> Key: ARIES-413
> URL: https://issues.apache.org/jira/browse/ARIES-413
> Project: Aries
> Issue Type: Improvement
> Components: JPA
> Affects Versions: 0.2
> Reporter: Bengt Rodehav
> Assignee: Timothy Ward
>
> It is only possible to use setter injection when injecting a JPA entity
> manager. The following injection types should also be supported since they
> are supported in the Blueprint spec:
> - Constructor injection
> - Factory method injection
> - Factory class injection
> An example of usage could be (using a factory method):
> <bean id="beanImpl" class="MyClass" factory-method="create">
> <argument>
> <jpa:context property="entityManager" unitname="myPU"/>
> </argument>
> </bean>
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