alluxio.web

Class JmxServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

alluxio.web.JmxServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class JmxServlet
extends javax.servlet.http.HttpServlet

Provides Read only web access to JMX.

This servlet generally will be placed under the /jmx URL for each HttpServer. It provides read only access to JMX metrics. The optional qry parameter may be used to query only a subset of the JMX Beans. This query functionality is provided through the MBeanServer.queryNames(ObjectName, javax.management.QueryExp) method.

For example http://.../metrics/jmx?qry=org.alluxio:* will return all alluxio metrics exposed through JMX.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected MBeanServer	mBeanServer MBean server.
protected com.fasterxml.jackson.core.JsonFactory	mJsonFactory Json Factory to create Json generators for write objects in json format.

Constructor Summary

Constructors

Constructor and Description
JmxServlet()

Method Summary

Modifier and Type	Method and Description
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Process a GET request for the specified resource.
protected void	doTrace(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp) Disable TRACE method to avoid TRACE vulnerability.
void	init() Initialize this servlet.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mBeanServer

protected MBeanServer mBeanServer

MBean server.

mJsonFactory

protected com.fasterxml.jackson.core.JsonFactory mJsonFactory

Json Factory to create Json generators for write objects in json format.

Constructor Detail

JmxServlet

public JmxServlet()

Method Detail

init

public void init()
          throws javax.servlet.ServletException

Initialize this servlet.

Overrides:

init in class javax.servlet.GenericServlet

Throws:

javax.servlet.ServletException

doTrace

protected void doTrace(javax.servlet.http.HttpServletRequest req,
                       javax.servlet.http.HttpServletResponse resp)
                throws javax.servlet.ServletException,
                       IOException

Disable TRACE method to avoid TRACE vulnerability.

Overrides:

doTrace in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)

Process a GET request for the specified resource.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Parameters:

request - The servlet request we are processing

response - The servlet response we are creating