[jboss-dev-forums] [JBoss AS7 Development] - Embedded AS

[Kabir Khan]

Kabir Khan [http://community.jboss.org/people/kabir.khan%40jboss.com] created the discussion

"Embedded AS"

To view the discussion, visit: http://community.jboss.org/message/569335#569335

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I'm having a play with getting the demos working as tests, and thought it would be cool to be able to start standalone in-vm as was done in BatchFailuresUnitTestCase/AbstractDeploymentTest.

The first problem I see is that when trying to use the StandaloneClient and calling SC.getServerModel() I get this exception:

Exception in thread "pool-11-thread-2" java.util.ServiceConfigurationError: org.jboss.marshalling.ProviderDescriptor: Provider org.jboss.mar
shalling.river.RiverProviderDescriptor could not be instantiated: java.lang.IllegalAccessError: tried to access class org.jboss.marshalling.
reflect.ConcurrentReferenceHashMap from class org.jboss.marshalling.reflect.SerializableClassRegistry
at java.util.ServiceLoader.fail(ServiceLoader.java:207)
at java.util.ServiceLoader.access$100(ServiceLoader.java:164)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:353)
at java.util.ServiceLoader$1.next(ServiceLoader.java:421)
at org.jboss.marshalling.Marshalling.loadMarshallerFactory(Marshalling.java:78)
at org.jboss.marshalling.Marshalling.getMarshallerFactory(Marshalling.java:74)
at org.jboss.as.protocol.ProtocolUtils.<clinit>(ProtocolUtils.java:50)
at org.jboss.as.protocol.mgmt.ManagementProtocolHeader.read(ManagementProtocolHeader.java:75)
at org.jboss.as.protocol.mgmt.ManagementResponseHeader.read(ManagementResponseHeader.java:60)
at org.jboss.as.protocol.mgmt.ManagementProtocolHeader.<init>(ManagementProtocolHeader.java:55)
at org.jboss.as.protocol.mgmt.ManagementResponseHeader.<init>(ManagementResponseHeader.java:45)
at org.jboss.as.protocol.mgmt.ManagementRequest$1.handle(ManagementRequest.java:124)
at org.jboss.as.protocol.mgmt.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:59)
at org.jboss.as.protocol.ConnectionImpl.safeHandleMessage(ConnectionImpl.java:239)
at org.jboss.as.protocol.ConnectionImpl$1$1.run(ConnectionImpl.java:198)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.IllegalAccessError: tried to access class org.jboss.marshalling.reflect.ConcurrentReferenceHashMap from class org.jboss
.marshalling.reflect.SerializableClassRegistry
at org.jboss.marshalling.reflect.SerializableClassRegistry.<init>(SerializableClassRegistry.java:61)
at org.jboss.marshalling.reflect.SerializableClassRegistry.<clinit>(SerializableClassRegistry.java:42)
at org.jboss.marshalling.river.RiverMarshallerFactory$1.run(RiverMarshallerFactory.java:46)
at org.jboss.marshalling.river.RiverMarshallerFactory$1.run(RiverMarshallerFactory.java:44)
at java.security.AccessController.doPrivileged(Native Method)
at org.jboss.marshalling.river.RiverMarshallerFactory.<init>(RiverMarshallerFactory.java:44)
at org.jboss.marshalling.river.RiverProviderDescriptor.<clinit>(RiverProviderDescriptor.java:35)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:345)
... 15 more
Exception in thread "pool-11-thread-2" java.util.ServiceConfigurationError: org.jboss.marshalling.ProviderDescriptor: Provider org.jboss.mar
shalling.river.RiverProviderDescriptor could not be instantiated: java.lang.IllegalAccessError: tried to access class org.jboss.marshalling.
reflect.ConcurrentReferenceHashMap from class org.jboss.marshalling.reflect.SerializableClassRegistry
 at java.util.ServiceLoader.fail(ServiceLoader.java:207)
 at java.util.ServiceLoader.access$100(ServiceLoader.java:164)
 at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:353)
 at java.util.ServiceLoader$1.next(ServiceLoader.java:421)
 at org.jboss.marshalling.Marshalling.loadMarshallerFactory(Marshalling.java:78)
 at org.jboss.marshalling.Marshalling.getMarshallerFactory(Marshalling.java:74)
 at org.jboss.as.protocol.ProtocolUtils.<clinit>(ProtocolUtils.java:50)
 at org.jboss.as.protocol.mgmt.ManagementProtocolHeader.read(ManagementProtocolHeader.java:75)
 at org.jboss.as.protocol.mgmt.ManagementResponseHeader.read(ManagementResponseHeader.java:60)
 at org.jboss.as.protocol.mgmt.ManagementProtocolHeader.<init>(ManagementProtocolHeader.java:55)
 at org.jboss.as.protocol.mgmt.ManagementResponseHeader.<init>(ManagementResponseHeader.java:45)
 at org.jboss.as.protocol.mgmt.ManagementRequest$1.handle(ManagementRequest.java:124)
 at org.jboss.as.protocol.mgmt.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:59)
 at org.jboss.as.protocol.ConnectionImpl.safeHandleMessage(ConnectionImpl.java:239)
 at org.jboss.as.protocol.ConnectionImpl$1$1.run(ConnectionImpl.java:198)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.IllegalAccessError: tried to access class org.jboss.marshalling.reflect.ConcurrentReferenceHashMap from class org.jboss
.marshalling.reflect.SerializableClassRegistry
 at org.jboss.marshalling.reflect.SerializableClassRegistry.<init>(SerializableClassRegistry.java:61)
 at org.jboss.marshalling.reflect.SerializableClassRegistry.<clinit>(SerializableClassRegistry.java:42)
 at org.jboss.marshalling.river.RiverMarshallerFactory$1.run(RiverMarshallerFactory.java:46)
 at org.jboss.marshalling.river.RiverMarshallerFactory$1.run(RiverMarshallerFactory.java:44)
 at java.security.AccessController.doPrivileged(Native Method)
 at org.jboss.marshalling.river.RiverMarshallerFactory.<init>(RiverMarshallerFactory.java:44)
 at org.jboss.marshalling.river.RiverProviderDescriptor.<clinit>(RiverProviderDescriptor.java:35)
 at java.lang.Class.forName0(Native Method)
 at java.lang.Class.forName(Class.java:247)
 at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:345)
 ... 15 more

ADT starts the server without using modules so everything uses the app classpath, so that may be the reason for the exception?

I have created a little 'ServerStarter' module programatically from my tests and added that to the module roots of my LocalModuleLoader. The server is then started with the correct module classloader and most classes are loaded from the module I would expect. The exception is when a module that defines the 'system' dependency tries to load a class and it both exists on the app classpath and in a 'real' module. In this case the class is always loaded from 'system'.

Looking at Module.loadModuleClass() the loaders for the path for this situation seem to always have SystemLocalLoader before the ModuleClassLoaders. Is this intentional? Is there another way to have things both in app classpath and in modules always be loaded by modules?
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