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ComputeEngineImpl
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ComputePi
ComputeEngineClient
Running the Example

Here's an example, based on the example shown in the Java RMI Tutorial, at http://java.sun.com/docs/books/tutorial/rmi/index.html .

We'll implement a simple Compute Server, which can accept anything that implements a Task interface.

Here's the Task interface:

package rmi;

/**
 * An Interface describing a task to be performed
 *
 * @author Bryan Higgs
 */
public interface Task<T>
{
  T execute();
}

And here is the remote interface, ComputeEngine:

package rmi;

import java.rmi.Remote;
import java.rmi.RemoteException;

/**
 * An RMI remote interface for a compute engine.
 *
 * @author Bryan Higgs
 */
public interface ComputeEngine extends Remote
{
  /**
   * Computes the specified task
   * @param task the task to be performed.
   */
  <T> T compute(Task<T> task) throws RemoteException;
}

Note how general this interface is:

• The ComputeEngine interface contains a single method, compute().
• The compute() method accepts an argument of type Task -- that is, any class that implements that interface.
• The compute() method returns a Task.