Jetty JMX Integration
The jetty JMX integration is based on the ObjectMBean implementation of DynamicMBean. This implementation allows an arbitrary POJO to be wrapped in an MBean and for meta data to be provided by properties files
The creation of MBeans is coordinated by the MBeanContainer implementation of the Container.Listener interface. The Jetty Server and it's components use a Container to maintain a containment tree of components and to support notification of changes to that tree. The MBeanContainer class listens for Container events and creates and destroys MBeans as required to wrap all Jetty components.
Using Jetty MBeans
The simplest way to use Jetty MBeans is to use the JVM supplied jconsole utility. If you use mx4j, then an internal HTTP agent can also be used (see jetty-jmx.xml config file comments).
See Running jetty with jconsole for instructions on how to configure jmx for use with Sun's jconsole.
Jetty Standalone
The MBeanContainer instance can be configured for a Jetty server by the jetty-jmx.xml configuration file. This can be run with the standard configuration file as follows:
java -jar start.jar etc/jetty-jmx.xml etc/jetty.xml
Jetty Maven Plugin
If you are using the jetty maven plugin you should copy the etc/jetty-jmx.xml file into your webapp project somewhere, such as src/etc, then add a <jettyConfig> element to the plugin <configuration>:
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<version>${project.version}</version>
<configuration>
<scanIntervalSeconds>10</scanIntervalSeconds>
<jettyConfig>src/etc/jetty-jmx.xml</jettyConfig>
<userRealms>
<userRealm implementation="org.mortbay.jetty.security.HashUserRealm">
<name>Test Realm</name>
<config>../../etc/realm.properties</config>
</userRealm>
</userRealms>
</configuration>
</plugin>
Running on Java 1.4 and below (with MX4J)
To run on Java 1.4 and below, mx4j library is used to provide the MBean server.
The commented out section of jetty-jmx.xml needs to be added to create the
mbean server and to register the JMX RMI connector:
<Call id="MBeanServer" class="javax.management.MBeanServerFactory" name="createMBeanServer"/>
<Call id="jmxConnector" class="javax.management.remote.JMXConnectorServerFactory" name="newJMXConnectorServer">
<Arg>
<New class="javax.management.remote.JMXServiceURL">
<Arg>service:jmx:rmi:///jndi/rmi:///jettymbeanserver</Arg>
</New>
</Arg>
<Arg/>
<Arg><Ref id="MBeanServer"/></Arg>
<Call name="start"/>
</Call>
Then, you will need to ensure that you have the rmiregistry running. The start sequence becomes:
rmiregistry &
java -Dcom.sun.management.jmxremote -jar start.jar etc/jetty-jmx.xml etc/jetty.xml [config files]
jconsole &
You then need to configure jconsole to find this remote connector using the Advanced panel and enter the connector url like so:
Click the Connect button and you will be able to manipulate the Jetty mbeans.
An example of how to start up Jetty with JMX programatically:
public static void main(String[] args) throws Exception { Server server = new Server(); SelectChannelConnector connector = new SelectChannelConnector(); connector.setPort(8080); server.addConnector(connector); WebAppContext web = new WebAppContext(); web.setContextPath("/wicket-in-action"); web.setWar("src/webapp"); server.addHandler(web); MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer(); MBeanContainer mBeanContainer = new MBeanContainer(mBeanServer); server.getContainer().addEventListener(mBeanContainer); mBeanContainer.start(); try { server.start(); server.join(); } catch (Exception e) { e.printStackTrace(); System.exit(100); } }