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  1.  
  2. import java.io.BufferedReader;
  3. import java.io.IOException;
  4. import java.io.InputStreamReader;
  5. import java.util.concurrent.*;
  6.  
  7. public class App {
  8.     public static void main(String[] args) throws ExecutionException, InterruptedException {
  9.         ExecutorService service = null;
  10.         String threadName = Thread.currentThread().getName();
  11.         try {
  12.             service = Executors.newFixedThreadPool(6); // +1 thread for producer
  13.             service.submit(new Producer(service)).get(); // Wait until producer exits
  14.         } finally {
  15.             if (null != service) {
  16.                 service.shutdown();
  17.                 System.out.printf("[%s] Awaiting termination...%n", threadName);
  18.                 try {
  19.                     service.awaitTermination(1, TimeUnit.HOURS);
  20.                 } catch (InterruptedException e) {
  21.                     System.err.println("Failed to terminate worker");
  22.                 }
  23.             }
  24.         }
  25.         System.out.printf("[%s] Done%n", threadName);
  26.     }
  27. }
  28.  
  29. class Worker implements Runnable {
  30.     private String message;
  31.  
  32.     public Worker(String message) {
  33.         this.message = message;
  34.     }
  35.  
  36.     @Override
  37.     public void run() {
  38.         String name = Thread.currentThread().getName();
  39.         ThreadLocalRandom random = ThreadLocalRandom.current();
  40.         try {
  41.             System.out.printf("[%s] Sending message '%s'...%n", name, message);
  42.             Thread.sleep(random.nextInt(5000, 30000));
  43.             System.out.printf("[%s] Message '%s' successfully sent!%n", name, message);
  44.         } catch (InterruptedException e) {
  45.             System.err.printf("[%s] Received interrupt signal, exiting...%n", name);
  46.         }
  47.     }
  48. }
  49.  
  50. class Producer implements Runnable {
  51.     private ExecutorService service;
  52.  
  53.     Producer(ExecutorService service) {
  54.         this.service = service;
  55.     }
  56.  
  57.     @Override
  58.     public void run() {
  59.         String threadName = Thread.currentThread().getName();
  60.         System.out.printf("[%s] Producer started. Enter \"exit\" to stop, or another string to " +
  61.                 "send it over message queue%n", threadName);
  62.         try {
  63.             BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  64.             String input = "";
  65.             while (!"exit".equals(input)) {
  66.                 input = br.readLine();
  67.                 if (!"exit".equals(input)) {
  68.                     service.submit(new Worker(input));
  69.                 }
  70.             }
  71.         } catch (IOException e) {
  72.             System.out.printf("[%s] IOException in producer, exiting...", threadName);
  73.         }
  74.         System.out.printf("[%s] Producer shutdown", threadName);
  75.     }
  76. }
  77.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
Main.java:7: error: class App is public, should be declared in a file named App.java
public class App {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/v4e7Fs
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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