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//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.deploy;
import java.io.IOException;
import java.lang.management.ManagementFactory;
import javax.management.MBeanServer;
import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.JMXConnectorServerFactory;
import javax.management.remote.JMXServiceURL;
import org.eclipse.jetty.toolchain.test.IO;
/**
* JmxServiceConnection
*
* Provides ability to create a connection to either an external
* JMX server, or a loopback connection to the internal one.
*/
public class JmxServiceConnection
{
private String serviceUrl;
private MBeanServer server;
private JMXConnectorServer connectorServer;
private JMXConnector serverConnector;
private MBeanServerConnection serviceConnection;
/**
* Construct a loopback connection to an internal server
*/
public JmxServiceConnection()
{
this(null);
}
/**
* Construct a connection to specified server
*
* @param url
* URL of JMX server
*/
public JmxServiceConnection(String url)
{
serviceUrl = url;
}
/**
* Retrieve an external URL for the JMX server
*
* @return service URL
*/
public String getServiceUrl()
{
return serviceUrl;
}
/* ------------------------------------------------------------ */
/**
* Retrieve a connection to MBean server
*
* @return connection to MBean server
*/
public MBeanServerConnection getConnection()
{
return serviceConnection;
}
public void connect() throws IOException
{
if (serviceConnection == null)
{
if (serviceUrl == null)
{
openLoopbackConnection();
}
else
{
openServerConnection(serviceUrl);
}
}
}
/**
* Open a loopback connection to local JMX server
*
* @throws IOException
*/
private void openLoopbackConnection() throws IOException
{
server = ManagementFactory.getPlatformMBeanServer();
JMXServiceURL serviceUrl = new JMXServiceURL("service:jmx:rmi://");
connectorServer = JMXConnectorServerFactory.newJMXConnectorServer(serviceUrl,null,server);
connectorServer.start();
this.serviceUrl = connectorServer.getAddress().toString();
serverConnector = JMXConnectorFactory.connect(connectorServer.getAddress());
serviceConnection = serverConnector.getMBeanServerConnection();
}
/**
* Open a connection to remote JMX server
*
* @param url
* @throws IOException
*/
private void openServerConnection(String url) throws IOException
{
serviceUrl = url;
serverConnector = JMXConnectorFactory.connect(new JMXServiceURL(serviceUrl));
serviceConnection = serverConnector.getMBeanServerConnection();
}
/**
* Close the connections
*/
public void disconnect()
{
IO.close(serverConnector);
if (connectorServer != null)
{
try
{
connectorServer.stop();
}
catch (Exception ignore)
{
/* ignore */
}
}
}
}
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