/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.jmx.adaptor.rmi;
import java.io.Serializable;
import java.lang.reflect.InvocationHandler;
import javax.management.ObjectName;
import javax.naming.InitialContext;
/**
* A factory for producing MBean proxies that run on a distant node and access
* the server through RMI. Most of the code comes from MBeanProxy.
*
* @version <tt>$Revision: 81030 $</tt>
* @author <a href="mailto:sacha.labourey@cogito-info.ch">Sacha Labourey</a>.
*/
public class RMIRemoteMBeanProxy
implements Serializable, InvocationHandler
{
/** The server to proxy invoke calls to. */
private final RMIAdaptor remoteServer;
/** The name of the object to invoke. */
private final ObjectName name;
/**
* Construct a MBeanProxy.
*/
RMIRemoteMBeanProxy (final ObjectName name, final javax.management.MBeanServer server) throws Exception
{
this.name = name;
this.remoteServer = getRmiAdaptor ();
}
/** Used when args is null. */
private static final Object EMPTY_ARGS[] = {};
/**
* Invoke the configured MBean via the target MBeanServer and decode
* any resulting JMX exceptions that are thrown.
*/
public Object invoke (final Object proxy, final java.lang.reflect.Method method, final Object[] args) throws Throwable
{
String methodName = method.getName();
// Get attribute
if (methodName.startsWith("get") && args == null)
{
String attrName = methodName.substring(3);
return remoteServer.getAttribute(name, attrName);
}
// Is attribute
else if (methodName.startsWith("is") && args == null)
{
String attrName = methodName.substring(2);
return remoteServer.getAttribute(name, attrName);
}
// Set attribute
else if (methodName.startsWith("set") && args != null && args.length == 1)
{
String attrName = methodName.substring(3);
remoteServer.setAttribute(name, new javax.management.Attribute(attrName, args[0]));
return null;
}
// Operation
// convert the parameter types to strings for JMX
Class[] types = method.getParameterTypes();
String[] sig = new String[types.length];
for (int i = 0; i < types.length; i++) {
sig[i] = types[i].getName();
}
// invoke the server and decode JMX exceptions
return remoteServer.invoke(name, methodName, args == null ? EMPTY_ARGS : args, sig);
}
protected RMIAdaptor getRmiAdaptor () throws Exception
{
InitialContext ctx = new InitialContext();
return (RMIAdaptor) ctx.lookup("jmx/invoker/RMIAdaptor");
}
///////////////////////////////////////////////////////////////////////////
// MBeanProxyInstance //
///////////////////////////////////////////////////////////////////////////
public final ObjectName getMBeanProxyObjectName()
{
return name;
}
public final RMIAdaptor getMBeanProxyRMIAdaptor()
{
return remoteServer;
}
///////////////////////////////////////////////////////////////////////////
// Factory Methods //
///////////////////////////////////////////////////////////////////////////
/**
* Create an MBean proxy.
*
* @param intf The interface which the proxy will implement.
* @param name A string used to construct the ObjectName of the
* MBean to proxy to.
* @param server The MBeanServer that contains the MBean to proxy to.
* @return A MBean proxy.
*
* @throws Exception Invalid object name.
*/
public static Object create (final Class intf, final String name, final javax.management.MBeanServer server) throws Exception
{
return create(intf, new ObjectName(name), server);
}
/**
* Create an MBean proxy.
*
* @param intf The interface which the proxy will implement.
* @param name The name of the MBean to proxy invocations to.
* @param server The MBeanServer that contains the MBean to proxy to.
* @return A MBean proxy.
*/
public static Object create (final Class intf, final ObjectName name, final javax.management.MBeanServer server) throws Exception
{
return java.lang.reflect.Proxy.newProxyInstance(Thread.currentThread ().getContextClassLoader (),
new Class[] { intf },
new RMIRemoteMBeanProxy(name, server));
}
}