Help is available for each task.

Task 1

Change the value of the constant HOST_NAME in RMIClient.java and RMIServer.java to match the name of your computer.

Task 2

Compile all Java source files.

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Use the javac program:

javac *.java

Task 3

From the Solution subdirectory, run the server, RMIServer with the smallest heap possible.

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Start a new DOS console and go to the directory that contains the java code.

Execute the following command: java -mx1m RMIServer This will run the Java Virtual Machine with a heap that can't grow.

Task 4

Run two instances of the client.

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Start two additional DOS consoles and go to the directory for the Java code.

In each DOS console, prepare to execute the following command:

java RMIClient

but do not hit the enter key, just yet.

When both consoles are ready, hit the Enter key for both so that start running at roughly the same time.

Notice the output from the different consoles. The Server will show when it creates each object. When each MessageObject is unreferenced, it will print a message and when the local garbage collector is about to destroy each MessageObject, they will print a message.

Notice that the local garbage collector does not destroy any objects until near the end of the run. You will also note that after the demonstration has finished it will take 10 minutes before the server complete releasing all of the objects. This shows that the lease term of the remote objects has been set to 10 minutes. Since the clients have terminated, the server will wait until the end of the lease term before it marks the objects as being 'clean'.

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