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PojavLauncherTeam
GitHub Repository: PojavLauncherTeam/openjdk-multiarch-jdk8u
 Path: blob/aarch64-shenandoah-jdk8u272-b10/jdk/src/share/demo/management/JTop/README.txt
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JTop monitors the CPU usage of all threads in a remote application

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which has remote management enabled.  JTop demonstrates the use of 

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the java.lang.management API to obtain the CPU consumption for 

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each thread.

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JTop is also a JConsole Plugin.  See below for details.

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JTop Standalone GUI

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===================

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JTop first establishes a connection to a JMX agent in a remote

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application with a JMX service URL:

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   service:jmx:rmi:///jndi/rmi://<hostName>:<portNum>/jmxrmi

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where <hostName> is the hostname and <portNum> is the port number

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to which the JMX agent will be connected.

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To run the demo

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---------------

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(1) Start the application with the JMX agent - here's an example of 

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    how the Java2D is started

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      java -Dcom.sun.management.jmxremote.port=1090

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           -Dcom.sun.management.jmxremote.ssl=false

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           -Dcom.sun.management.jmxremote.authenticate=false

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           -jar <JDK_HOME>/demo/jfc/Java2D/Java2Demo.jar

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    This instruction uses the Sun's built-in support to enable a JMX agent

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    with a JMX service URL as described above.

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    You can programmatically start a JMX agent with the RMI connector

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    using javax.management.remote API.  See the javadoc and examples for 

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    javax.management.remote API for details.

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(2) Run JTop on a different machine:

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      java -jar <JDK_HOME>/demo/management/JTop/JTop.jar <hostname>:1090

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    where <hostname> is where the Java2Demo.jar runs in step (1).

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These instructions assume that this installation's version of the java

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command is in your path.  If it isn't, then you should either

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specify the complete path to the java command or update your

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PATH environment variable as described in the installation

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instructions for the Java(TM) SDK.

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JTop JConsole Plugin

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====================

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JTop is a JConsole Plugin which adds a "JTop" tab to JConsole.

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To run JConsole with the JTop plugin 

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------------------------------------

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    jconsole -pluginpath <JDK_HOME>/demo/management/JTop/JTop.jar

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To compile

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----------

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    javac -classpath <JDK_HOME>/lib/jconsole.jar JTopPlugin.java

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com.sun.tools.jconsole API is in jconsole.jar which is needed

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in the classpath for compilation.

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