ThreadPoolExecutor.DiscardPolicy in Java
November 15, 2023
1. ThreadPoolExecutor.DiscardPolicy
belongs to java.util.concurrent package. It is introduced in Java 5. 2.
ThreadPoolExecutor.DiscardPolicy
is the handler for rejected task by ThreadPoolExecutor
. It silently discards the rejected task and throws no error. 3.
ThreadPoolExecutor.DiscardPolicy
has a method rejectedExecution(Runnable r, ThreadPoolExecutor e) which accepts a Runnable
task and ThreadPoolExecutor
.
ThreadPoolExecutor.DiscardPolicy
is passed as an argument while initializing ThreadPoolExecutor
.
ThreadPoolExecutor tpool= new ThreadPoolExecutor(2,3,500, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(), new ThreadPoolExecutor.DiscardPolicy());
Example
DiscardPolicyDemo.javapackage com.concretepage; import java.util.concurrent.LinkedBlockingQueue; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit; public class DiscardPolicyDemo { class DemoThread implements Runnable { public void run() { System.out.println("Hello World"); } } public static void main(String... args) { Runnable th=new DiscardPolicyDemo().new DemoThread(); ThreadPoolExecutor tpool= new ThreadPoolExecutor(2,3,500, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(), new ThreadPoolExecutor.DiscardPolicy()); tpool.execute(th); } }
Hello World