【转】JBoss扩展MBean

 

众所周知Jboss依赖于JMX来装载MBean服务，而这些MBean服务组成了具体服务器实例的差异性。标准JBoss发布版本提供的所有功能都是基于MBean的。所以，如果要为JBoss服务器添加新的服务，最好的方法是开发自己的JMX MBean服务。
MBean服务的生命周期是由如下三个JBoss MBean负责的：SARDeployer、ServiceConfigurator、ServiceController。

如自定义MBean服务依赖于其他MBean服务，可以通过如下方法实现：
1、在自定义MBean接口中添加Service中任何方法。
   这种方式避免了对JBoss具体接口的依赖。
2、为自定义MBean接口扩展org.jboss.system.Service接口。

3、为自定义MBean接口扩展org.jboss.system.ServiceMBean接口。
   最简单的办法是将自定义MBean接口继承于ServiceMBean接口，将MBean实现类继承ServiceMBeanSupport类。ServiceMBeanSupport已经实现了ServiceMBean接口，ServiceMBeanSupport还集成了日志、JBoss服务状态管理跟踪功能，这些方法需要我们具体实现createService、startService、stopService和destroyService中的部分方法。

下面介绍基于ServiceMBean接口和ServiceMBeanSupport类的JNDIMapMBean接口及其JNDIMap实现类

package org.joss.chap2.ex2; import javax.naming.NamingException; import org.jboss.system.ServiceMBean; public interface JNDIMapMBean extends ServiceMBean{ public String getJndiName(); public void setJndiName(String jndiName) throws NamingException; } package org.joss.chap2.ex2; import java.util.HashMap; import javax.management.MBeanServer; import javax.management.ObjectName; import javax.naming.InitialContext; import javax.naming.Name; import javax.naming.NamingException; import org.jboss.naming.NonSerializableFactory; import org.jboss.system.ServiceMBeanSupport; public class JNDIMap extends ServiceMBeanSupport implements JNDIMapMBean{ private String jndiName; private HashMap contextMap = new HashMap(); public JNDIMap(){ super(); // TODO Auto-generated constructor stub } public String getJndiName(){ return jndiName; } public void setJndiName(String jndiName) throws NamingException{ String oldName = this.jndiName; this.jndiName = jndiName; if(super.getState()==STARTED) { unbind(oldName); try { rebind(); } catch(Exception e) { NamingException ne = new NamingException("Failed to update jndiName"); ne.setRootCause(e); throw ne; } } } public void startService()throws Exception { rebind(); } public void stopService() { unbind(jndiName); } private void rebind() throws NamingException { InitialContext rootCtx = new InitialContext(); Name fullName = rootCtx.getNameParser("").parse(jndiName); NonSerializableFactory.rebind(fullName,contextMap,true); } private void unbind(String jndiName) { try { InitialContext rootCtx = new InitialContext(); rootCtx.unbind(jndiName); NonSerializableFactory.unbind(jndiName); } catch(NamingException e) { System.out.println(e); } } public String getName() { // TODO Auto-generated method stub return null; } public int getState() { // TODO Auto-generated method stub return 0; } public String getStateString() { // TODO Auto-generated method stub return null; } public void jbossInternalLifecycle(String arg0) throws Exception { // TODO Auto-generated method stub } public void create() throws Exception { // TODO Auto-generated method stub } public void start() throws Exception { // TODO Auto-generated method stub } public void stop() { // TODO Auto-generated method stub } public void destroy() { // TODO Auto-generated method stub } public ObjectName preRegister(MBeanServer arg0, ObjectName arg1) throws Exception { // TODO Auto-generated method stub return null; } public void postRegister(Boolean arg0) { // TODO Auto-generated method stub } public void preDeregister() throws Exception { // TODO Auto-generated method stub } public void postDeregister() { // TODO Auto-generated method stub } } 

<?xml version="1.0" encoding="UTF-8"?> <server> <mbean code="org.joss.chap2.ex2.JNDIMap" name="chap2.ex2:service=JNDIMap"> <attribute name="JndiName">inmemory/map/MapTest</attribute> <depends>jboss:service=Naming</depends> </mbean> </server> 

 

原本地址：http://www.blogjava.net/hengheng123456789/articles/87766.html