Examples of thread.concurrencyCookbook.chapter4.recipe8.PeriodictskExecution

com.packtpub.java7.concurrency.chapter4.recipe8.task.Task

PeriodictskExecution class of the example. Send a task to the executor that will execute every two seconds. Then, control the remaining time for the next execution of the task

When you want to execute a periodic task using the Executor framework, you need a ScheduledExecutorService object. To create it (as with every executor), Java recommends the use of the Executors class. This class works as a factory of executor objects. In this case, you should use the newScheduledThreadPool() method to create a ScheduledExecutorService object. That method receives as a parameter the number of threads of the pool. As you have only one task in this example, you have passed the value 1 as a parameter

    // Creates the Task
    Task task=new Task();
    // Creates the Thread
    Thread thread=new Thread(task);
    // Sets de uncaugh exceptio handler
    thread.setUncaughtExceptionHandler(new ExceptionHandler());
    // Starts the Thread
    thread.start();
    
    try {
      thread.join();

   * exception 
   * @param args
   */
  public static void main(String[] args) {
    // Creates the Task
    Task task=new Task();
    // Creates the Thread
    Thread thread=new Thread(task);
    // Sets de uncaugh exceptio handler
    thread.setUncaughtExceptionHandler(new ExceptionHandler());
    // Starts the Thread

    ScheduledExecutorService executor=Executors.newScheduledThreadPool(1);
    System.out.printf("Main: Starting at: %s\n",new Date());


    // Create a new task and sends it to the executor. It will start with a delay of 1 second and then
    // it will execute every two seconds
    Task task=new Task("Task");
    ScheduledFuture<?> result=executor.scheduleAtFixedRate(task, 1, 2, TimeUnit.SECONDS);
    
    // Controlling the execution of tasks
    for (int i=0; i<10; i++){
      System.out.printf("Main: Delay: %d\n",result.getDelay(TimeUnit.MILLISECONDS));

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