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javaejb-3.0jndilocal

JNDI lookup of EJB3 inside an EAR file on Glassfish

I have an EAR file with a bunch of JARs in it, and one of these JARs contains Local Session Beans (EJB3). I need to perform a JNDI lookup of these Session Beans from within an unmanaged POJO, also contained in the EAR (and in this case in the same JAR as the EJBs as well). I tried following the Glassfish EJB FAQ, but I keep on receiving a javax.naming.NameNotFoundException no matter what I try.

I am unsure of a few things. Where should I put my ejb-jar.xml (I tried the EARs META-INF as well as the JARs META-INF)? Do I need a sun-ejb-jar.xml? What exactly is ejb-link, what does it do? What could I be doing wrong (my configuration is almost identical to the one given in the FAQ for local lookups)?

I list some of the configuration I tried and the result below:

<enterprise-beans>
  <session>
    <ejb-name>ITestBean</ejb-name>
    <ejb-class>com.test.TestBean</ejb-class>
    <ejb-local-ref>
      <ejb-ref-name>ITestBean</ejb-ref-name>
      <local>com.test.ITestBean</local>
    </ejb-local-ref>
  </session>
 </enterprise-beans>

Application deploys but JNDI lookup returns null.

<enterprise-beans>
  <session>
    <ejb-name>ITestBean</ejb-name>
    <ejb-class>com.test.TestBean</ejb-class>
    <ejb-local-ref>
      <ejb-ref-name>ITestBean</ejb-ref-name>
      <local>com.test.ITestBean</local>
      <ejb-link>ITestBean</ejb-link>
    </ejb-local-ref>
  </session>
 </enterprise-beans>

Application doesn't deploy: Unable to determine local business vs. remote business designation for EJB 3.0 ref Unresolved Ejb-Ref ITestBean@jndi.

<enterprise-beans>
  <session>
    <ejb-name>ITestBean</ejb-name>
    <ejb-class>com.test.TestBean</ejb-class>
    <ejb-local-ref>
      <ejb-ref-name>ITestBean</ejb-ref-name>
      <local>com.test.ITestBean</local>
      <ejb-link>MyJar.jar#ITestBean</ejb-link>
    </ejb-local-ref>
  </session>
 </enterprise-beans>

Application doesn't deploy: Error: Unresolved : MyJar.jar#ITestBean.

<enterprise-beans>
  <session>
    <ejb-name>ITestBean</ejb-name>
    <local>com.test.ITestBean</local>
    <ejb-local-ref>
      <ejb-ref-name>ITestBean</ejb-ref-name>
    </ejb-local-ref>
  </session>
 </enterprise-beans>

Error processing EjbDescriptor

Solution

  • It isn't possible to perform a JNDI lookup of a bean from a POJO, unless that POJO is called (directly or indirectly) from a managed class (such as a session bean). In other words, the first example won't work while the second one will (assuming MyPOJO is the class that tries to perform a JNDI lookup):

    1) UnmanagedClass1 -> UnmanagedClass2 -> UnmanagedClass3 -> MyPOJO
    2) ManagedClass -> UnmanagedClass2 -> UnmanagedClass3 -> MyPOJO