Running the M-Let Manager Example

The MBeans in the agent and manager (client) examples are identical, and we will set up the example in exactly the same manner.

$ cd examplesDir/MLetClient/
$ javac -classpath classpath *.java

$ jar cf Square.jar Square.class SquareMBean.class
$ rm Square.class SquareMBean.class

$ jar cf EquilateralTriangle.jar EquilateralTriangle.class \
EquilateralTriangleMBean.class
$ rm EquilateralTriangle.class EquilateralTriangleMBean.class

The manager is written to be run on the same host as the agent application. If you wish to run it on a different host, you will need to modify the code for the Client class constructor where the agent address is specified (see Example 12-5). You could place the jar files and the m-let file on a remote machine and specify its new URL as the parameter to the manager application; we run the example with this file in the current directory.

Before launching the manager, you must launch the agent. Here we give commands for launching the applications from the same terminal window running the Korn shell. On the Windows NT platform, you will have to launch each application in a separate window.

$ java -classpath classpath Agent &
$ java -classpath classpath Client file:${PWD}/GeometricShapes.html

In the output of the manager, you can see it create the m-let service MBean, and then ask it to load the HTML file. Finally, we can see the two MBeans that were loaded directly through the class loader shortcut. If you connect to the agent in a web browser at the following URL: http://localhost:8082/ and reload its agent view every time the manager pauses, you can see the MBeans as they are created.

The agent terminates after it disconnects its connector client. When you are done viewing the agent, type the following commands to stop the agent application:

$ fg
java [...] Agent <Control-C>
^C$