[javaee-spec users] Re: Question about ejb modules
- From: "John D. Ament" <john.d.ament@...>
- To: users@...
- Subject: [javaee-spec users] Re: Question about ejb modules
- Date: Tue, 22 Oct 2013 08:57:49 -0400
Where in the spec is this indicated?
On Tue, Oct 22, 2013 at 8:39 AM, JJ Snyder <j.j.snyder@...> wrote:
> Application libraries are processed by CDI.
> On 10/21/2013 09:20 PM, John D. Ament wrote:
>> Hi Linda,
>> Thanks for the response.
>> So for one, I guess what you are saying is that the intention is that
>> an ejb-module, as defined within application.xml of an EAR file is
>> intended to contain at least one EJB, but you seem to be implying that
>> you don't think it's perfectly clear from the way the spec reads
>> currently. I can enter an issue for this if you'd like. The one
>> concern I have is that you're referencing an ejb-jar, but
>> application.xml only really has a reference to an ejb-module.
>> the other half of the issue is that there is no way, right now, to
>> define a JAR file that just contains CDI beans. I think this is more
>> evident with Java EE 7 where CDI beans can actually be used almost
>> entirely throughout an application, especially with the addition of
>> transaction services. I think the platform spec needs to consider an
>> enhancement to application.xml to support a
>> <bean-archive>path/to/jar</bean-archive> entry that indicates this is
>> a bean archive within the scope of an EAR file, unless it's expected
>> that CDI beans should be scanned from the lib folder of an EAR.
>> On Mon, Oct 21, 2013 at 6:45 PM, Linda DeMichiel
>> <linda.demichiel@...> wrote:
>>> On 10/19/13 7:54 AM, John D. Ament wrote:
>>>> I ran into an interesting issue on GlassFish 4, which I hadn't seen
>>>> before in other application servers. It appears that if I want to
>>>> deploy an EAR, I cannot put CDI beans into a standalone module, expect
>>>> it to be scanned and added to the application.
>>>> Previously, I had used a trick by marking the module as an EJB module
>>>> it would scan for CDI beans and make them available within my EAR.
>>>> Now ignoring the CDI scoping issues at play, I am seeing an error come
>>>> back from GlassFish 4 stating that an EJB module must contain at least
>>>> one session bean/entity bean/MDB.
>>>> Is this expected? If so, which spec actually defines this behavior? I
>>>> was having a hard time finding it.
>>> Thanks for your post.
>>> While the EJB spec should have been more explicit as to whether an
>>> ejb-jar file must contain EJB beans, I think it is safe to say
>>> that this is the intention of the spec. For example, see section 15.1:
>>> "An ejb-jar file produced by the Bean Provider contains one or
>>> more enterprise beans that typically do not contain application
>>> assembly instructions. The ejb-jar file produced by an Application
>>> Assembler (which can be the same person or organization as the
>>> Bean Provider) contains one or more enterprise beans, plus
>>> application assembly information describing how the enterprise
>>> beans are combined into a single application deployment unit."
>>> Please file a JIRA issue at https://java.net/jira/browse/EJB_SPEC, so
>>> that we can track this item for purposes of discussion and clarification
>>> in the next release.
>>> As to the GlassFish behavior, my understanding is that GlassFish
>>> introduced the error-checking for this case back in the Java EE 5 days.
>>> For further follow-up with our GlassFish team, please post with more
>>> details about your use case to users@... or file a JIRA
>>> issue at https://java.net/jira/browse/GLASSFISH.