How to implement MBean (that depends on singleton stateless local EJB) in Wildfly
Hello.. I am migrating an application from JBoss 6 AS to Wildfly AS 8.2.0. Application employs MBeans and it is used as follows:
All the MBean implementation classes extend ServiceMBeanSupport and containing createService(), destroyService(), startService(), stopService() lifecycle methods.
Type-1. MBean class extending ServiceMBeanSupport and containing createService(), destroyService(), startService(), stopService() lifecycle methods.
Type-2. MBean implementation class depending on singleton stateless local EJB as mentioned below.
@Singleton
@Local(TestLocal.class)
@Resource(name="TestLocal", mappedName="java:/ConnectionFactory")
public class TestLocal {
....
....
}
Type-3. MBean class of type Type-1 depending on another MBean class which depends on singleton stateless local EJB.
Assume there are three MBean implementation classes - A, B, C.
A is of type Type-1. MBean class A is registered in jboss-service.xml.
B is of type Type-2.
I came across a web link http://codrspace.com/codertrader/making-an-mbean-ejb3-and-wildfly-compliant/ which explains about how to make an MBean EJB3 and Wildfly complaint. I am using this option for an MBean that depends on singleton stateless local EJB.
MBean Class B depends on singleton stateless local EJB (say TestLocal) and I have modified the class B as per the web link as shown below.
@Singleton
@LocalBean
@Startup
@DependsOn({"TestLocal"})
public class B {
private ObjectName objectName = null;
...
...
@PostConstruct
public void registerAsMBean() throws Exception {
startService();
try {
objectName = new ObjectName("test.classB:service=TestClassB" );
MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
mBeanServer.registerMBean( this, objectName );
} catch ( Exception e ) {
throw new IllegalStateException( "Problem occurred while registering test.classB:service=TestClassB into JMX:" + e );
}
}
@PreDestroy
public void unRegisterAsMBean() throws Exception {
stopService();
try {
ManagementFactory.getPlatformMBeanServer().unregisterMBean( this.objectName );
} catch ( Exception e ) {
throw new IllegalStateException( "Problem occurred while un-registering test.classB:service=TestClassB from JMX:" + e );
}
}
public void createService() throws Exception {
...
}
public void destroyService() throws Exception {
...
}
public void startService() throws Exception {
...
}
public void stopService() throws Exception {
...
}
}
Please note that I have defined public methods - createService(), startService(), destroyService(), stopService() in the above class B which is registered as MBean and found that they are exposed in the registered MBean in JMX console but they are not MBean life cycle methods.
My first question is - Is the above MBean implementation (class B) right ?
C is of type Type-3. So, how this MBean should be implemented ? Like the type Type-1 and registering it in jboss-service.xml with <depends>test.classB:service=TestClassB</depends>
(I tried it seems it is not working. Any valuable comments are welcomed.)
OR
Should MBean C be implemented as class B and if yes, then how to make MBean C depend on MBean B ?
Please let me know if I am not clear in explaining the problem. Please help me. Many thanks.