3 Replies Latest reply on Jul 20, 2005 9:23 AM by eldiosyeldiablo

    Unable to execute methods on MBean proxy

    eldiosyeldiablo
    eldiosyeldiablo Jul 19, 2005 6:48 PM

      I have implemented a simple MBean and tested it using the JMX Console but I get an error when I try to execute any method programatically from my ejb session.

      The error is

      [STDOUT] java.lang.reflect.UndeclaredThrowableException
18:39:36,931 INFO [STDOUT] at $Proxy57.getDbDriver(Unknown Source)
18:39:36,932 INFO [STDOUT] at com.relevant.e3.ejb.item.ItemBO.getDbDriverMBean(ItemBO.java:41)
18:39:36,932 INFO [STDOUT] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
18:39:36,932 INFO [STDOUT] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
18:39:36,932 INFO [STDOUT] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
18:39:36,932 INFO [STDOUT] at java.lang.reflect.Method.invoke(Method.java:585)
18:39:36,932 INFO [STDOUT] at com.relevant.e3.ejb.businesscontroller.BusinessController.execute(BusinessController.java:293)
18:39:36,932 INFO [STDOUT] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
18:39:36,933 INFO [STDOUT] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
18:39:36,933 INFO [STDOUT] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
18:39:36,933 INFO [STDOUT] at java.lang.reflect.Method.invoke(Method.java:585)
18:39:36,933 INFO [STDOUT] at org.jboss.invocation.Invocation.performCall(Invocation.java:345)
18:39:36,933 INFO [STDOUT] at org.jboss.ejb.StatefulSessionContainer$ContainerInterceptor.invoke(StatefulSessionContainer.java:584)
18:39:36,933 INFO [STDOUT] at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:123)
18:39:36,933 INFO [STDOUT] at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:185)
18:39:36,933 INFO [STDOUT] at org.jboss.ejb.plugins.StatefulSessionInstanceInterceptor.invoke(StatefulSessionInstanceInterceptor.java:294)
18:39:36,933 INFO [STDOUT] at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:48)
18:39:36,934 INFO [STDOUT] at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:105)
18:39:36,934 INFO [STDOUT] at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:313)
18:39:36,934 INFO [STDOUT] at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:146)
18:39:36,934 INFO [STDOUT] at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:192)
18:39:36,934 INFO [STDOUT] at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122)
18:39:36,934 INFO [STDOUT] at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:624)
18:39:36,934 INFO [STDOUT] at org.jboss.ejb.Container.invoke(Container.java:870)
18:39:36,934 INFO [STDOUT] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
18:39:36,934 INFO [STDOUT] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
18:39:36,935 INFO [STDOUT] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
18:39:36,935 INFO [STDOUT] at java.lang.reflect.Method.invoke(Method.java:585)
18:39:36,935 INFO [STDOUT] at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:144)
18:39:36,935 INFO [STDOUT] at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
18:39:36,935 INFO [STDOUT] at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
18:39:36,935 INFO [STDOUT] at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
18:39:36,935 INFO [STDOUT] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
18:39:36,935 INFO [STDOUT] at org.jboss.invocation.jrmp.server.JRMPInvoker$MBeanServerAction.invoke(JRMPInvoker.java:805)
18:39:36,935 INFO [STDOUT] at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:406)
18:39:36,935 INFO [STDOUT] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
18:39:36,936 INFO [STDOUT] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
18:39:36,936 INFO [STDOUT] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
18:39:36,936 INFO [STDOUT] at java.lang.reflect.Method.invoke(Method.java:585)
18:39:36,936 INFO [STDOUT] at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
18:39:36,936 INFO [STDOUT] at sun.rmi.transport.Transport$1.run(Transport.java:153)
18:39:36,936 INFO [STDOUT] at java.security.AccessController.doPrivileged(Native Method)
18:39:36,936 INFO [STDOUT] at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
18:39:36,936 INFO [STDOUT] at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
18:39:36,936 INFO [STDOUT] at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
18:39:36,937 INFO [STDOUT] at java.lang.Thread.run(Thread.java:595)
18:39:36,939 INFO [STDOUT] Caused by: javax.management.InstanceNotFoundException: com.relevant:name=E3Settings is not registered.
18:39:36,939 INFO [STDOUT] at org.jboss.mx.server.registry.BasicMBeanRegistry.get(BasicMBeanRegistry.java:509)
18:39:36,940 INFO [STDOUT] at org.jboss.mx.server.MBeanServerImpl.getAttribute(MBeanServerImpl.java:533)
18:39:36,940 INFO [STDOUT] at javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:175)
18:39:36,940 INFO [STDOUT] ... 46 more


      The code to retrieve the MBean reference is 

      protected final E3SettingsMBean getServerSettings() {

 E3SettingsMBean mbean = null;

 //target MBean
 ObjectName objectName = null;
 try {
 objectName = new ObjectName("com.relevant:name=E3Settings");
 } catch (MalformedObjectNameException e) {
 return null;
 }

 if (objectName != null) {
 //find the local MBeanServer
// MBeanServer server = MBeanServerLocator.locateJBoss();
 MBeanServer server = ManagementFactory.getPlatformMBeanServer();

 // Get a type-safe dynamic proxy
 mbean =
 (E3SettingsMBean)MBeanServerInvocationHandler.newProxyInstance(
 server,
 objectName,
 E3SettingsMBean.class,
 false);
 // Use the proxy
 String dbURL = mbean.getDbURL();
 mbean.sayHello();
 }

 return mbean;
 }


      The MBean interface is
      package com.relevant.e3.ejb.resource;

import org.jboss.system.ServiceMBean;

public interface E3SettingsMBean extends ServiceMBean {

 public void sayHello();
 public int add(int x, int y);

 public String getDbDriver();
 public void setDbDriver(String driver);
 public String getDbURL();
 public void setDbURL(String url);
 public String getDbUser();
 public void setDbUser(String user);
 public String getDbPassword();
 public void setDbPassword(String password);
}

      The implementation of the interface is.. 
      package com.relevant.e3.ejb.resource;
import javax.management.*;

import org.apache.log4j.Logger;
import org.jboss.system.ServiceMBeanSupport;

public class E3Settings extends ServiceMBeanSupport
//public class E3Settings extends NotificationBroadcasterSupport
 implements E3SettingsMBean {

 protected static Logger logger;

 private static final String DEFAULT_DBDRIVER =
 "net.sourceforge.jtds.jdbc.Driver";
 private String dbDriver = DEFAULT_DBDRIVER;
 private static final String DEFAULT_DBURL =
 "jdbc:jtds:sqlserver://sql2003:1433/patbiz";
 private String dbURL = DEFAULT_DBURL;
 private static final String DEFAULT_DBUSER = "java";
 private String dbUser = DEFAULT_DBUSER;
 private static final String DEFAULT_DBPASSWORD = "java";
 private String dbPassword = DEFAULT_DBPASSWORD;

 private String name="E3Settings";

 //Used for notifications
 private long sequenceNumber = 1;

 public E3Settings() {
 if (logger == null) {
 logger = Logger.getLogger(E3Settings.class);
 }
 }

 /**
 * Testing java docs
 * @jmx Testing
 * @jmx.desc Testing jmx.desc
 */
 public void sayHello() {
 System.out.println("hello, world");
 }

 public int add(int x, int y) {
 return x + y;
 }

 public String getDbDriver() {
 return dbDriver;
 }

 /**
 * Sets the database connection string for the MBean.
 * @jmx.desc
 *
 * @param Value to set the database connection string to.
 */
 public synchronized void setDbDriver(String driver) {
 String oldStr = dbDriver;
 dbDriver = driver;

logger.debug("dbDriver now " + dbDriver);

 Notification n =
 new AttributeChangeNotification(this,
 sequenceNumber++,
 System.currentTimeMillis(),
 "dbDriver changed",
 "DbDriver",
 "int",
 oldStr,
 dbDriver);

 sendNotification(n);
 }

 public String getDbURL() {
 return dbURL;
 }

 public synchronized void setDbURL(String url) {
 String oldStr = dbURL;
 dbURL = url;

logger.debug("dbURL now " + dbURL);

 Notification n =
 new AttributeChangeNotification(this,
 sequenceNumber++,
 System.currentTimeMillis(),
 "dbURL changed",
 "DbURL",
 "int",
 oldStr,
 dbURL);

 sendNotification(n);
 }

 public String getDbUser() {
 return dbUser;
 }

 public synchronized void setDbUser(String user) {
 String oldStr = dbUser;
 dbUser = user;

logger.debug("dbUser now " + dbUser);

 Notification n =
 new AttributeChangeNotification(this,
 sequenceNumber++,
 System.currentTimeMillis(),
 "dbUser changed",
 "DbUser",
 "int",
 oldStr,
 dbUser);

 sendNotification(n);
 }

 public String getDbPassword() {
 return dbPassword;
 }

 public synchronized void setDbPassword(String password) {
 String oldStr = dbPassword;
 dbPassword = password;

logger.debug("dbPassword now " + dbPassword);

 Notification n =
 new AttributeChangeNotification(this,
 sequenceNumber++,
 System.currentTimeMillis(),
 "dbPassword changed",
 "DbPassword",
 "int",
 oldStr,
 dbPassword);

 sendNotification(n);
 }

 //The lifecycle
 protected void startService() throws Exception {
 log.info("Starting with message= E3Settings");
 }
 protected void stopService() throws Exception {
 log.info("Stopping with message= E3Settings");
 }
}


      The jboss-service.xml file is.. 
      <?xml version="1.0" encoding="UTF-8"?>

<server>
 <mbean code="com.relevant.e3.ejb.resource.E3Settings"
 name="com.relevant:service=E3Settings">
 <!-- A plain attribute -->
 <attribute name="DbDriver">net.sourceforge.jtds.jdbc.Driver</attribute>
 <attribute name="DbURL">jdbc:jtds:sqlserver://sql2003:1433/patbiz</attribute>
 <attribute name="DbUser">java</attribute>
 <attribute name="DbPassword">java</attribute>
 </mbean>
</server>

      Again sorry for the long post but I'm sure someone would have asked for one of the above files if I had left them out.

      Thank you,
      -David

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