| JTop monitors the CPU usage of all threads in a remote application |
| which has remote management enabled. JTop demonstrates the use of |
| the java.lang.management API to obtain the CPU consumption for |
| each thread. |
| |
| JTop is also a JConsole Plugin. See below for details. |
| |
| JTop Standalone GUI |
| =================== |
| |
| JTop first establishes a connection to a JMX agent in a remote |
| application with a JMX service URL: |
| service:jmx:rmi:///jndi/rmi://<hostName>:<portNum>/jmxrmi |
| |
| where <hostName> is the hostname and <portNum> is the port number |
| to which the JMX agent will be connected. |
| |
| To run the demo |
| --------------- |
| (1) Start the application with the JMX agent - here's an example of |
| how the Java2D is started |
| |
| java -Dcom.sun.management.jmxremote.port=1090 |
| -Dcom.sun.management.jmxremote.ssl=false |
| -Dcom.sun.management.jmxremote.authenticate=false |
| -jar <JDK_HOME>/demo/jfc/Java2D/Java2Demo.jar |
| |
| This instruction uses the Sun's built-in support to enable a JMX agent |
| with a JMX service URL as described above. |
| You can programmatically start a JMX agent with the RMI connector |
| using javax.management.remote API. See the javadoc and examples for |
| javax.management.remote API for details. |
| |
| (2) Run JTop on a different machine: |
| |
| java -jar <JDK_HOME>/demo/management/JTop/JTop.jar <hostname>:1090 |
| |
| where <hostname> is where the Java2Demo.jar runs in step (1). |
| |
| These instructions assume that this installation's version of the java |
| command is in your path. If it isn't, then you should either |
| specify the complete path to the java command or update your |
| PATH environment variable as described in the installation |
| instructions for the Java(TM) SDK. |
| |
| JTop JConsole Plugin |
| ==================== |
| |
| JTop is a JConsole Plugin which adds a "JTop" tab to JConsole. |
| |
| To run JConsole with the JTop plugin |
| ------------------------------------ |
| jconsole -pluginpath <JDK_HOME>/demo/management/JTop/JTop.jar |
| |
| |
| To compile |
| ---------- |
| javac -classpath <JDK_HOME>/lib/jconsole.jar JTopPlugin.java |
| |
| com.sun.tools.jconsole API is in jconsole.jar which is needed |
| in the classpath for compilation. |