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// This class encapsulates a Producer. Each new instance of this class
// creates a different thread which tries to nq into the queue
// Currently queues random values generated by the Random class
// If timeout expires, the Producer instance returns
//package NexusII.util ;
import java.util.Random ;
public class Producer extends Thread
{
// If no time out is desired, timeout value is set to one. so the run method
// knows which nq to call
public Producer(MT_Bounded_Queue queue)
{
this.queue_ = queue ;
this.iterations_ = new Integer(DEFAULT_ITERATIONS);
this.time_out_ = -1 ;
}
// Include the name of the thread as a parameter
public Producer(MT_Bounded_Queue queue, String name)
{
super(name);
this.queue_ = queue ;
this.iterations_ = new Integer(DEFAULT_ITERATIONS);
this.time_out_ = -1 ;
}
// If the number of iterations are also included --
public Producer(MT_Bounded_Queue queue, String name, Integer iterations)
{
super(name);
this.queue_ = queue ;
iterations_ = iterations ;
this.time_out_ = -1 ;
}
// Finally, if the timeout period is also included
public Producer(MT_Bounded_Queue queue, String name, Integer iterations, long msec_timeout)
{
super(name);
this.queue_ = queue ;
iterations_ = iterations ;
this.time_out_ = msec_timeout ;
}
// The hook method called by start()
public void run()
{
// Initialize the random number generator
Random rand = new Random();
for(int i=0;i<iterations_.intValue();i++)
{
int err = 0 ;
// Get the next random value for insertion into queue
Integer new_item = new Integer(rand.nextInt()) ;
// Doesnt make sense to have a negative timeout -- default
if(time_out_ < 0)
queue_.nq(new_item);
else
err = queue_.nq(new_item,time_out_);
// If timedout stop this thread
if(err == -1)
{
System.out.println(getName() + ": Timed Out \n");
return ;
}
System.out.println(getName() + ": enqueued " + new_item.intValue());
}
}
private static final int DEFAULT_ITERATIONS = 1 ;
protected MT_Bounded_Queue queue_ ;
private Integer iterations_ ;
private long time_out_ ;
}
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