// @(#)HelloWorld1.java

import drcl.comp.*;

/** This component sends "Hello World!" at "port@" every <i>period</i> seconds.  */
public class HelloWorld1 extends drcl.comp.Component implements drcl.comp.RestartableComponent
{
	double period = 0.5; // second
	Port port = addPort("port", false);

	/** Constructor. */
	public HelloWorld1()
	{ super(); }

	/** Constructor. */
	public HelloWorld1(String id_)
	{ super(id_); }

	public void reset()
	{
		super.reset(); // Let super class reset its fields.
	}

	public void duplicate(Object source_)
	{
		super.duplicate(source_); // Let super class copy its fields.
		period = ((HelloWorld1)source_).period;
	}

	public String info()
	{
		return "Period = " + period + "\n";
	}

	// Starts as an ActiveComponent.
	protected void _start()
	{
		while (true) {
			port.doSending("Hello World!\n");
			sleepFor(period);
			if (isStopped())
				wait(this);
		}
	}

	// Resumes this ActiveComponent.
	protected void _resume()
	{
		notifyAll(this);
	}
	
	public void setPeriod(double period_)
	{
		period = period_;
	} 
	
	public double getPeriod()
	{
		return period;
	}
}