// concurrent/SingleThreadExecutor.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.concurrent.*;

import java.util.stream.*;

import onjava.*;

public class SingleThreadExecutor {

public static void main(String[] args) {

ExecutorService exec =

Executors.newSingleThreadExecutor();

IntStream.range(0, 10)

.mapToObj(NapTask::new)

.forEach(exec::execute);

System.out.println("All tasks submitted");

exec.shutdown();

while(!exec.isTerminated()) {

System.out.println(

Thread.currentThread().getName() +

" awaiting termination");

new Nap(0.1);

}

}

}

/* Output:

All tasks submitted

main awaiting termination

main awaiting termination

NapTask[0] pool-1-thread-1

main awaiting termination

NapTask[1] pool-1-thread-1

NapTask[2] pool-1-thread-1

main awaiting termination

NapTask[3] pool-1-thread-1

main awaiting termination

main awaiting termination

NapTask[4] pool-1-thread-1

NapTask[5] pool-1-thread-1

main awaiting termination

NapTask[6] pool-1-thread-1

main awaiting termination

main awaiting termination

NapTask[7] pool-1-thread-1

main awaiting termination

NapTask[8] pool-1-thread-1

main awaiting termination

NapTask[9] pool-1-thread-1

*/