JAVA-BASED REAL-TIME PROGRAMMING

4. Exercises and Labs
}
}
super(mach , speed , tempController , waterController , spinController);
/**
* This method contains the actual code for the washing program. Executed
* when the start() method is called.
*/
protected void wash() throws InterruptedException {
}
// Switch of temp regulation
myTempController.putEvent(new TemperatureEvent(this ,
TemperatureEvent.TEMP_IDLE ,
0.0));
// Switch off spin
mySpinController.putEvent(new SpinEvent(this , SpinEvent.SPIN_OFF));
// Drain
myWaterController.putEvent(new WaterEvent(this ,
WaterEvent.WATER_DRAIN ,
0.0));
mailbox.doFetch(); // Wait for Ack
// Set water regulation to idle => drain pump stops
myWaterController.putEvent(new WaterEvent(this ,
WaterEvent.WATER_IDLE ,
0.0));
// Unlock
myMachine.setLock(false);
Example controller
All controllers are be implemented as periodic threads. Note the usage of the
simulation speed parameter to adjust the period. The perform method will
be called periodically. It is important that you do not implement any lengthy
actions or block/sleep in this method.
public class WaterController extends PeriodicThread {
// TODO: add suitable attributes
}
Messages
public WaterController(AbstractWashingMachine mach , double speed) {
super((long) (3000/ speed)); // TODO: replace with suitable period
}
public void perform() {
// TODO: check if there are any messages in the mailbox (tryFetch).
// Take action depending on the last received message.
}
The washing program communicates with the controllers through messages.
Subclasses of the main message (RTEvent) class suitable for the washing
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