6:09 p.m.
Kai Grunert [http://community.jboss.org/people/kgrunert] created the discussion
"class loading of an inbound resource adapter?"
To view the discussion, visit: http://community.jboss.org/message/623879#623879
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Hello,
I have just written an inbound resource adapter and everything seems to work fine with it.
When I deploy my RA to the JBoss 7.0.1 AS, the container calls the
ResourceAdapter.start(BootstrapContext ctx) method and I get a log message that the
resource adapter has been started successfully.
In the next step, I try to activate an endpoint for my MDB using the following
annotations:
...
import de.RATest.UDPMessageListener;
@MessageDriven(messageListenerInterface = UDPMessageListener.class,
activationConfig={
@ActivationConfigProperty(propertyName = "port",
propertyValue="15660")
})
public class UDPMessageDrivenBean implements UDPMessageListener{
public void onMessage(String str){
...
}
}
Unfortunately when I deploy the MDB, I end up with a NoClassDefFoundError and
ClassNotFoundException for the MessageListener Interface:
23:56:30,367 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-4) MSC00001: Failed
to start service
jboss.deployment.subunit."MDB_RA_TEST.ear"."MDBs.war".INSTALL:
org.jboss.msc.service.StartException in service
jboss.deployment.subunit."MDB_RA_TEST.ear"."MDBs.war".INSTALL: Failed
to process phase INSTALL of subdeployment "MDBs.war" of deployment
"MDB_RA_TEST.ear"
at
org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:121)
at
org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)
at
org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
[:1.6.0_26]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
[:1.6.0_26]
at java.lang.Thread.run(Thread.java:662) [:1.6.0_26]
Caused by: java.lang.LinkageError: Failed to link UDPMessageDrivenBean (Module
"deployment.MDB_RA_TEST.ear.MDBs.war:main" from Service Module Loader)
at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:401)
at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:261)
at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:76)
at org.jboss.modules.Module.loadModuleClass(Module.java:588)
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:183)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:358)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:330)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:307)
at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:101)
at java.lang.Class.forName0(Native Method) [:1.6.0_26]
at java.lang.Class.forName(Class.java:247) [:1.6.0_26]
at
org.jboss.as.ee.component.EEClassConfigurationProcessor$1.compute(EEClassConfigurationProcessor.java:124)
at
org.jboss.as.ee.component.EEClassConfigurationProcessor$1.compute(EEClassConfigurationProcessor.java:114)
at org.jboss.as.ee.component.LazyValue.get(LazyValue.java:40)
at
org.jboss.as.ee.component.EEApplicationDescription.getClassConfiguration(EEApplicationDescription.java:183)
at
org.jboss.as.ejb3.component.messagedriven.MessageDrivenComponentDescription.createConfiguration(MessageDrivenComponentDescription.java:78)
at
org.jboss.as.ee.component.EEModuleConfigurationProcessor.deploy(EEModuleConfigurationProcessor.java:63)
at
org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:115)
... 5 more
Caused by: java.lang.NoClassDefFoundError: de/RATest/UDPMessageListener
at java.lang.ClassLoader.defineClass1(Native Method) [:1.6.0_26]
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) [:1.6.0_26]
at java.lang.ClassLoader.defineClass(ClassLoader.java:615) [:1.6.0_26]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
[:1.6.0_26]
at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:397)
... 22 more
Caused by: java.lang.ClassNotFoundException: de.RATest.UDPMessageListener from [Module
"deployment.MDB_RA_TEST.ear.MDBs.war:main" from Service Module Loader]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:191)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:358)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:330)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:330)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:307)
at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:101)
... 27 more
I'm relatively new in the Java EE world and have not a lot of experiences with
resource adapters, but this exceptions seems to me that the classes of the .RAR-file are
not loaded correctly. I have read parts of the specification and also tried a lot with
different combinations of archives, for example: a standalone .rar and a .ejb-jar file,
everything inside of an .ear-file and a lot of other combination - but nothing has worked.
I am actually not sure anymore, that the resource adapter is completely correct. I have
some questions that maybe could solve my problem:
* do I need an JBoss specific deployment descriptor for the resource adapter?
* do I have to modify the standalone-preview.xml also for an inbound resource adapter?
* do I need something like the @ResourceAdapter annotation in my MDB?
* if my inbound resource adapter is correct, should I see it in the management console
under "Connector" -> "Resource Adapters"?
Here are some more facts, that could be important:
* use of JCA 1.6
* only annotations, so I have no ra.xml or ironjacamar.xml
* I have started the standalone-preview.xml without any modifications
* I have checked the RA with the ironjacamar validator and ended up with a
"Validation successful"
I have really no clue how to go on and hope that you can help me. To simplify matters I
have attached the sources.
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