/* Copyright (c) 2006, Sriram Srinivasan
*
* You may distribute this software under the terms of the license
* specified in the file "License"
*/
package kilim.examples;
import kilim.ExitMsg;
import kilim.Mailbox;
import kilim.Pausable;
import kilim.Task;
/**
* Spawn a task, communicate through a shared mailbox. The task's
* termination is knowm through another mailbox.
*
* The structure of this class is not much different from a Thread
* version that uses PipedInput/OutputStreams (Task instead of Thread,
* execute() instead of run(), and typed, buffered mailboxes instead
* of pipes.
*
* [compile] javac -d ./classes SimpleTask.java
* [weave] java kilim.tools.Weave -d ./classes kilim.examples.SimpleTask
* [run] java -cp ./classes:./classes:$CLASSPATH kilim.examples.SimpleTask
*/
public class SimpleTask extends Task {
static Mailbox<String> mb = new Mailbox<String>();
public static void main(String[] args) throws Exception {
Task t = new SimpleTask().start();
Thread.sleep(10);
mb.putnb("Hello ");
mb.putnb("World\n");
// mb.putnb("done");
}
/**
* The entry point. mb.get() is a blocking call that yields
* the thread ("pausable")
*/
public void execute() throws Pausable{
while (true) {
String s = mb.get();
if (s.equals("done")) break;
System.out.print(s);
}
// This is not good form. Tasks shouldn't be exiting the system.
// See SimpleTask2 for a better way to clean up.
System.exit(0);
}
}