/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, 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.system.server.jmx;
import javax.management.remote.*;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;
import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* RMIAdapter replacement using JMXConnector
* @author Scott Marlow smarlow@redhat.com
*
*/
public class JMXAdapter implements ObjectFactory {
// cache the connection to the server so that we don't leak each new JMXConnector
private static Map<String,javax.management.remote.JMXConnector> jmxConnectorMap = new ConcurrentHashMap<String,javax.management.remote.JMXConnector>();
public JMXAdapter() {
}
public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable<?, ?> environment) throws Exception {
if ( obj != null && obj instanceof Reference) {
Reference ref = (Reference)obj;
// The JMXServiceURL points to the jmx server
RefAddr urlRef = ref.get("JMXServiceURL");
String url = (String)urlRef.getContent();
JMXServiceURL jmxserviceURL = new JMXServiceURL(url);
javax.management.remote.JMXConnector jmxc = null;
jmxc = jmxConnectorMap.get(url);
if(jmxc != null) {
try {
// attempt to detect that the cached connection is broken
jmxc.getConnectionId();
}
catch(IOException e) {
close(jmxc);
jmxc = null; // ignore the broken connection and get a new one
}
}
if(jmxc == null) {
jmxc = JMXConnectorFactory.connect(jmxserviceURL, new HashMap());
jmxConnectorMap.put(url, jmxc);
}
return jmxc.getMBeanServerConnection();
}
return null;
}
/**
* Can be called from the client side application to close all (JMXConnector) connections to the server.
* If new connections are obtained while current connections are being closed, the new connections will not
* be closed.
*/
public static void closeAll() {
Collection<String> keys = jmxConnectorMap.keySet();
Collection<javax.management.remote.JMXConnector> values = jmxConnectorMap.values();
for (javax.management.remote.JMXConnector c : values) {
close(c);
}
for (String key : keys) {
jmxConnectorMap.remove(key);
}
}
private static void close(javax.management.remote.JMXConnector jmxc) {
try {
jmxc.close(); // clean up any local resources associated with the connection (e.g. background threads)
}
catch( IOException ignore)
{
}
}
}