/*
* $Id: JdmkAgent.java 19191 2010-08-25 21:05:23Z tcarlson $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
*
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.module.management.agent;
import org.mule.AbstractAgent;
import org.mule.api.MuleException;
import org.mule.api.lifecycle.InitialisationException;
import org.mule.config.i18n.CoreMessages;
import org.mule.util.ClassUtils;
import org.mule.util.StringUtils;
import java.net.URI;
import javax.management.InstanceNotFoundException;
import javax.management.MBeanException;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.ObjectName;
import javax.management.ReflectionException;
/**
* <code>JdmkAgent</code> configures an Jdmk Http Adaptor for Jmx management,
* statistics and configuration viewing of a Mule instance.
* <p/>
* TODO MULE-1353
*/
public class JdmkAgent extends AbstractAgent
{
/** A FQN of the adaptor class to instantiate via reflection. */
public static final String CLASSNAME_ADAPTER = "com.sun.jdmk.comm.HtmlAdaptorServer";
private static final String PROTOCOL_PREFIX = "http://";
public static final String DEFAULT_HOSTNAME = "localhost";
public static final int DEFAULT_PORT = 9092;
public static final String DEFAULT_JMX_ADAPTOR_URL = PROTOCOL_PREFIX + DEFAULT_HOSTNAME + ":" + DEFAULT_PORT;
private String jmxAdaptorUrl;
private String host;
private String port;
private MBeanServer mBeanServer;
private ObjectName adaptorName;
public JdmkAgent()
{
super("jdmk-agent");
}
protected Object createAdaptor() throws Exception
{
final URI uri = new URI(jmxAdaptorUrl);
final int port = uri.getPort();
return ClassUtils.instanciateClass(CLASSNAME_ADAPTER,
new Object[] {new Integer(port)}, this.getClass());
}
public String getDescription()
{
return "Jdmk Http adaptor: " + jmxAdaptorUrl;
}
public void start() throws MuleException
{
try
{
mBeanServer.invoke(adaptorName, "start", null, null);
}
catch (InstanceNotFoundException e)
{
throw new JmxManagementException(
CoreMessages.failedToStart("Jdmk agent"), adaptorName, e);
}
catch (MBeanException e)
{
throw new JmxManagementException(
CoreMessages.failedToStart("Jdmk agent"), adaptorName, e);
}
catch (ReflectionException e)
{
// ignore
}
}
public void stop() throws MuleException
{
if (mBeanServer == null)
{
return;
}
try
{
mBeanServer.invoke(adaptorName, "stop", null, null);
}
catch (InstanceNotFoundException e)
{
throw new JmxManagementException(
CoreMessages.failedToStop("Jdmk agent"), adaptorName, e);
}
catch (MBeanException e)
{
throw new JmxManagementException(
CoreMessages.failedToStop("Jdmk agent"), adaptorName, e);
}
catch (ReflectionException e)
{
// ignore
}
}
public void dispose()
{
try
{
stop();
}
catch (Exception e)
{
// TODO: log an exception
}
}
public void initialise() throws InitialisationException
{
try
{
mBeanServer = (MBeanServer)MBeanServerFactory.findMBeanServer(null).get(0);
final Object adaptor = createAdaptor();
if (StringUtils.isBlank(jmxAdaptorUrl))
{
if (StringUtils.isNotBlank(host) && StringUtils.isNotBlank(port))
{
jmxAdaptorUrl = PROTOCOL_PREFIX + host + ":" + port;
}
else
{
jmxAdaptorUrl = DEFAULT_JMX_ADAPTOR_URL;
}
}
// TODO use Jmx support classes
adaptorName = new ObjectName("Adaptor:class=" + adaptor.getClass().getName());
mBeanServer.registerMBean(adaptor, adaptorName);
}
catch (Exception e)
{
throw new InitialisationException(CoreMessages.failedToStart("Jdmk Agent"), e, this);
}
}
/**
* @return Returns the jmxAdaptorUrl.
*/
public String getJmxAdaptorUrl()
{
return jmxAdaptorUrl;
}
/**
* @param jmxAdaptorUrl The jmxAdaptorUrl to set.
*/
public void setJmxAdaptorUrl(String jmxAdaptorUrl)
{
this.jmxAdaptorUrl = jmxAdaptorUrl;
}
public String getHost()
{
return host;
}
public void setHost(String host)
{
this.host = host;
}
public String getPort()
{
return port;
}
public void setPort(String port)
{
this.port = port;
}
}