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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