Load balancing and clustering in JBoss 4.2.2 GA
Hi,
Needed for EJB 3.0
I have implemented the same sample in Eclipse Ganymede RS1.
The first one call a local interface and it does not work. The second one call a remote interface with the same business logic and it works.
I have been visiting some webs and I have found this Jboss post,
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4105969#4105969
He has got the solution. He is talking about @Clustered annotation.
My problem is that I have not configured my JBoss 4.2.2 GA for clustering and load balancing. And I do not know if it is possible.
Are you following me? I mean, I do not manage these terms as well as I would like.
I have set the @Clustered annotation in my session stateless bean, and my default configuration returns me the following exception at deployment,
20:44:46,576 WARN [ServiceController] Problem creating service jboss.j2ee:service=EJB3,module=CalculatorEJB.jar java.lang.annotation.AnnotationFormatError: Invalid default: public abstract java.lang.Class org.jboss.annotation.ejb.Clustered.loadBalancePolicy() at java.lang.reflect.Method.getDefaultValue(Unknown Source) at sun.reflect.annotation.AnnotationType.<init>(Unknown Source) at sun.reflect.annotation.AnnotationType.getInstance(Unknown Source) at sun.reflect.annotation.AnnotationParser.parseAnnotation(Unknown Source) at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source) at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source) at java.lang.Class.initAnnotationsIfNecessary(Unknown Source) at java.lang.Class.getAnnotation(Unknown Source) at org.jboss.aop.annotation.AnnotationElement.getVisibleAnnotation(AnnotationElement.java:88) at org.jboss.aop.Advisor.resolveAnnotation(Advisor.java:321) at org.jboss.ejb3.SessionContainer.checkForDuplicateLocalAndRemoteInterfaces(SessionContainer.java:126) at org.jboss.ejb3.SessionContainer.instantiated(SessionContainer.java:119) at org.jboss.ejb3.Ejb3Deployment.deployElement(Ejb3Deployment.java:492) at org.jboss.ejb3.Ejb3Deployment.deployElement(Ejb3Deployment.java:442) at org.jboss.ejb3.Ejb3Deployment.deployUrl(Ejb3Deployment.java:423) at org.jboss.ejb3.Ejb3Deployment.deploy(Ejb3Deployment.java:384) at org.jboss.ejb3.Ejb3Deployment.create(Ejb3Deployment.java:327) at org.jboss.ejb3.Ejb3Module.createService(Ejb3Module.java:77) at org.jboss.system.ServiceMBeanSupport.jbossInternalCreate(ServiceMBeanSupport.java:260) at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:243) at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978) at $Proxy0.create(Unknown Source) at org.jboss.system.ServiceController.create(ServiceController.java:330) at org.jboss.system.ServiceController.create(ServiceController.java:273) at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy33.create(Unknown Source) at org.jboss.ejb3.EJB3Deployer.create(EJB3Deployer.java:492) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142) at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97) at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238) at org.jboss.wsf.container.jboss42.DeployerInterceptor.create(DeployerInterceptor.java:76) at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.create(SubDeployerInterceptorSupport.java:180) at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:91) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy34.create(Unknown Source) at org.jboss.deployment.MainDeployer.create(MainDeployer.java:969) at org.jboss.deployment.MainDeployer.create(MainDeployer.java:959) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:818) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782) at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy9.deploy(Unknown Source) at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421) at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:634) at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263) at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:336) at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289) at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245) at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978) at $Proxy0.start(Unknown Source) at org.jboss.system.ServiceController.start(ServiceController.java:417) at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy4.start(Unknown Source) at org.jboss.deployment.SARDeployer.start(SARDeployer.java:302) at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:766) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy5.deploy(Unknown Source) at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:482) at org.jboss.system.server.ServerImpl.start(ServerImpl.java:362) at org.jboss.Main.boot(Main.java:200) at org.jboss.Main$1.run(Main.java:508) at java.lang.Thread.run(Unknown Source)
And at the end, the log says,
20:44:50,854 ERROR [URLDeploymentScanner] Incomplete Deployment listing: --- MBeans waiting for other MBeans --- ObjectName: jboss.j2ee:service=EJB3,module=CalculatorEJB.jar State: FAILED Reason: java.lang.annotation.AnnotationFormatError: Invalid default: public abstract java.lang.Class org.jboss.annotation.ejb.Clustered.loadBalancePolicy() --- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM --- ObjectName: jboss.j2ee:service=EJB3,module=CalculatorEJB.jar State: FAILED Reason: java.lang.annotation.AnnotationFormatError: Invalid default: public abstract java.lang.Class org.jboss.annotation.ejb.Clustered.loadBalancePolicy()
This are my my class,
#1 The local interface
package jboss.tutorial;
import javax.ejb.Local;
@Local
public interface Calculator {
public int add(int x, int y);
public int subtract(int x, int y);
}
#2 The bean
package jboss.tutorial;
import javax.ejb.Stateless;
import org.jboss.annotation.ejb.Clustered;
/**
* Session Bean implementation class CalculatorBean
*/
@Stateless
@Clustered
public class CalculatorBean implements Calculator {
/**
* Default constructor.
*/
public CalculatorBean() {
// TODO Auto-generated constructor stub
}
@Override
public int add(int x, int y) {
// TODO Auto-generated method stub
return x + y;
}
@Override
public int subtract(int x, int y) {
// TODO Auto-generated method stub
return x - y;
}
}
#3 The client
package jboss.tutorial;
import java.util.Properties;
import javax.ejb.EJB;
import javax.naming.InitialContext;
import javax.naming.Context;
public class CalculatorClient {
@EJB
private static Calculator calculator;
public CalculatorClient() {
try {
Properties props = new Properties();
props.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
props.put("java.naming.factory.url.pkgs", "jnp://localhost:1099");
props.put("java.naming.provider.url", "jnp://localhost:1099");
Context ctx = new InitialContext(props);
calculator = (Calculator) ctx.lookup("CalculatorEAR/CalculatorBean/local");
} catch (Exception ex) {
System.out.println("Couldn’t create calculator bean. "+
ex.getMessage());
}
}
public void doOperations() {
try {
System.out.println("1 + 1 = " + calculator.add(1, 1));
System.out.println("1 - 1 = " + calculator.subtract(1, 1));
System.exit(0);
} catch (Exception ex) {
System.err.println("Caught an unexpected exception!");
ex.printStackTrace();
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
CalculatorClient cClient = new CalculatorClient();
cClient.doOperations();
}
}
Running the application I can instantiate the local interface, but when I call it in the doOperations() method, it gives me the catch exception.
So I guess it is a configuration question.
Regards,
pepelara
