CODEWITHSUNDEEP
javamultithreading
Ashish
Ashish

Reputation: 14707

How to keep running a Thread after specific time

I have a Thread which I wants to run after every 15 minute. Currently I am calling this thread from another class like 

Class B{
public void start(){
 while(true){
 new Thread(new A()).start();
   }
 }
}

Class A implements Runnable{
  @override
  public void run(){
   //some operation
  }
}

How can I invoke Thread A on every 15 minute.

Upvotes: 4

Views: 2869

Answers (6)

SparkOn
SparkOn

Reputation: 8956

alternate options use class java.util.Timer

Timer time = new Timer();
ScheduledTask st = new ScheduledTask();
time.schedule(st, 0, 15000);

or

public void scheduleAtFixedRate(TimerTask task,long delay,long period);

Or even

java.util.concurrent.ScheduledExecutorService 's methods 

schedule(Runnable command, long delay, TimeUnit unit)

Upvotes: 2

Braj
Braj

Reputation: 46871

You can use Timer or ScheduledExecutorService to repeat a task at an interval.

An ExecutorService that can schedule commands to run after a given delay, or to execute periodically.

sample code:

ScheduledExecutorService executorService = Executors.newScheduledThreadPool(1);

executorService.scheduleAtFixedRate(new Runnable() {
    public void run() {
        System.out.println("Asynchronous task");
    }
}, 0, 15, TimeUnit.MINUTES);

Find more examples...

Upvotes: 5

markspace
markspace

Reputation: 11030

I think a Timer will do ya.

import java.util.Timer;
import java.util.TimerTask;

  class A extends TimerTask {
     @Override
     public void run(){
        //some operation
     }
  }

  A task = new A();
  final long MINUTES = 1000 * 60;
  Timer timer = new Timer( true );
  timer.schedule(task, 15 * MINUTES, 15 * MINUTES);

Upvotes: 0

pgiecek
pgiecek

Reputation: 8240

Look at classes Timer and TimerTask.

A facility for threads to schedule tasks for future execution in a background thread. Tasks may be scheduled for one-time execution, or for repeated execution at regular intervals.

Upvotes: 3

Orel Eraki
Orel Eraki

Reputation: 12196

When started it can't start again.

You can put Thread.Sleep(15*60*1000) inside the run function in order to make it sleep and surround it with while in order to loop again.

Upvotes: 0

TheLostMind
TheLostMind

Reputation: 36304

use sleep like this:

public void run(){
  while(true){
  // some code
   try{
       Thread.sleep(15*60*1000) // sleep for 15 minutes
      }
    catch(InterruptedException e)
    {
    }
   }
  }

Upvotes: 2

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