8 Replies Latest reply on Jan 5, 2011 7:28 AM by jaikiran

how to mix EJBs from web and ejb modules

fsotest Jan 3, 2011 2:57 PM

I would like to implement EJBs both inside a war module and inside an ejb module. Both kinds of EJBs must be invoked from the war module. Therefore, I have created a minor test application in which a servlet (using @EJB annotations) invokes both a EJB implemented inside the same war module as contains the servlet and another EJB implemented inside an ejb-module within the same ear file. But as soon as I add the ejb module to the manifest file of war-module, the application can not be deployed anymore. The following exception is thrown:

011-01-03 20:31:25,864 WARN  [org.jboss.ejb3.interceptor.InterceptorInfoRepository] (HDScanner) EJBTHREE-1852: InterceptorInfoRepository is deprecated
2011-01-03 20:31:26,431 WARN  [org.jboss.ejb3.interceptor.InterceptorInfoRepository] (HDScanner) EJBTHREE-1852: InterceptorInfoRepository is deprecated
2011-01-03 20:31:26,443 WARN  [org.jboss.ejb3.Ejb3AnnotationHandler] (HDScanner) JBMETA-4: did not find any bean meta data for annotation bean EJBTestBean, will create some
2011-01-03 20:31:26,461 ERROR [org.jboss.weld.integration.instantiator.RedirectingBeanInstantiatorDeployer] (HDScanner) Error during undeploy: vfs:///D:/udvikling/jboss-6.0.0.Final/server/default/deploy/mytest.ear/mytest.web.war/: java.lang.IllegalStateException: Not installed: org.jboss.ejb.bean.instantiator/mytest/mytest.web/EJBTestBean
    at org.jboss.dependency.plugins.AbstractController.uninstall(AbstractController.java:790) [jboss-dependency.jar:2.2.0.GA]
    at org.jboss.dependency.plugins.AbstractController.uninstall(AbstractController.java:669) [jboss-dependency.jar:2.2.0.GA]
    at org.jboss.ejb3.instantiator.deployer.BeanInstantiatorDeployerBase.undeploy(BeanInstantiatorDeployerBase.java:157) [:1.0.0-alpha-4]
    at org.jboss.weld.integration.instantiator.RedirectingBeanInstantiatorDeployer.undeploy(RedirectingBeanInstantiatorDeployer.java:74) [:6.0.0.Final]
    at org.jboss.deployers.plugins.deployers.DeployerWrapper.undeploy(DeployerWrapper.java:204) [:2.2.0.GA]

I have attached both the complete log file and the minor application causing the problems.

I would like to know how I can get the above scenario working. As far as I can see jboss tries to scan the ejb module for EJBs even though I have indicated inside the application.xml that it is an ejb module.

Setup:

JBoss 6.0.0 Final

JDK: 1.6.0_23

OS: Windows 7

server.log.zip 4.8 KB
mytest.ear 4.6 KB

1. Re: how to mix EJBs from web and ejb modules

fsotest Jan 3, 2011 3:26 PM (in response to fsotest)

BTW I know that I could create an ejb client jar for the ejb module and place the business interface inside the ejb client jar while hiding the ejb implementation inside the ejb module. But I am not interested in using ejb client jars.
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2. Re: how to mix EJBs from web and ejb modules

jaikiran Jan 4, 2011 3:32 AM (in response to fsotest)
Try removing the following from the META-INF/MANIFEST.MF of the mytest.war:

Class-Path: mytest.ejb.jar
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3. Re: how to mix EJBs from web and ejb modules

fsotest Jan 4, 2011 8:51 AM (in response to jaikiran)

By removing the entry the classes from the ejb module is no longer at the classpath inside the war module, and then it is not possible to invoke the EJB inside the ejb module from within the war-module. And that's what I am trying to do. I know that it is the existence of this manifest entry that is causing the problems, but as far as I know it is the only way to get access to the ejb module.
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4. Re: how to mix EJBs from web and ejb modules

jaikiran Jan 4, 2011 8:53 AM (in response to fsotest)

Fin Steenbjerg wrote:

By removing the entry the classes from the ejb module is no longer at the classpath inside the war module, and then it is not possible to invoke the EJB inside the ejb module from within the war-module.
Are you talking in the context of some IDE?
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5. Re: how to mix EJBs from web and ejb modules

fsotest Jan 4, 2011 10:02 AM (in response to jaikiran)

Yes the problem pops up in eclipse (eclipse 3.6 and jboss tools 3.2 beta2). But I haven't tried removing the manifest entry inside the ear file being deployed at jboss - I will try it as soon as I get back to my computer. I think that the manifest entry must be there in order for the classes inside the ejb module to be visible inside the war module at runtime - isn't that stated by specs (I have been using websphere for a while and websphere certainly uses the manifest files for adding classes to classpath).
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6. Re: how to mix EJBs from web and ejb modules

jaikiran Jan 4, 2011 10:05 AM (in response to fsotest)

https://issues.jboss.org/browse/JBAS-8754?focusedCommentId=12572151&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-12572151
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7. Re: how to mix EJBs from web and ejb modules

fsotest Jan 4, 2011 3:32 PM (in response to jaikiran)

I can bring it to work by removing the entry from the manifest file of the war-module and instead adding the ejb-module (as a project) to the build path of the war-module project inside eclipse. So that is ok, just different from what I have been used to.

Do you have any links to dokumentation of jboss classloading and also how annotation scanning works (hopefully for JBAS 6.0) ?

Thanks for your quick response in solving my problem. Really nice.
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8. Re: how to mix EJBs from web and ejb modules

jaikiran Jan 5, 2011 7:28 AM (in response to fsotest)

Fin Steenbjerg wrote:

Do you have any links to dokumentation of jboss classloading and also how annotation scanning works (hopefully for JBAS 6.0) ?

These are some good articles on classloading in JBoss AS:

http://community.jboss.org/wiki/jbossclassloadingusecases
http://community.jboss.org/wiki/classloadingconfiguration
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