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https://issues.apache.org/jira/browse/ARIES-413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12912558#action_12912558
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Timothy Ward commented on ARIES-413:
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As the existing JPA blueprint schema has been released twice, I think this
change will need to go in version 1.1 of the schema.
I am going to make the property attribute of <unit/> and <context/> optional,
and add a new attribute index.
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I propose the following usage for both unit and context:
To inject into a property "foo" : <unit property="foo" unitname="bar"/>
To inject as an un-indexed constructor argument: <unit unitname="bar"/>
To inject as an indexed constructor argument at position 2: <unit index="2"
unitname="bar"/>
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The following will generate exceptions when parsing:
<unit property="foo" index="1" unitname="bar"/> - it is invalid to specify a
property attribute and an index attribute
<unit index="abc" unitname="bar"/> - it is invalid to specify an index
attribute that is not parseable as an int
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What do people think of this proposed change? It allows for complete
replacement of the <argument> element (as per the original use case) in a
single element (rather than having to nest it). This approach is also backward
compatible with the existing schema, and has an identical usage pattern for
both property and constructor injection.
> 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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