import java.util.Random;

import java.util.concurrent.Callable;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.Future;

import java.util.concurrent.TimeUnit;

/**

* JAVA MULTITHREAD - Executors - SingleThread

*

* @author RinaldoDev

*/

public class Executors_SingleThread_Callable {

public static void main(String[] args) throws Exception {

ExecutorService executor = null;

try {

executor = Executors.newSingleThreadExecutor();

Future<String> future = executor.submit(new Tarefa());

System.out.println(future.isDone());

// System.out.println(future.get());

System.out.println(future.get(1, TimeUnit.SECONDS));

System.out.println(future.isDone());

// executor.shutdown();

// executor.awaitTermination(10, TimeUnit.SECONDS);

// System.out.println(future.isDone());

} catch (Exception e) {

throw e;

} finally {

if (executor != null) {

// executor.shutdown();

executor.shutdownNow();

}

}

}

public static class Tarefa implements Callable<String> {

@Override

public String call() throws Exception {

Thread.sleep(1000);

String name = Thread.currentThread().getName();

int nextInt = new Random().nextInt(1000);

return name + ": Inscreva-se no canal! " + nextInt;

}

}

}

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