Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.concurrent.Semaphore;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class Main {
    public static void main(String[] args) {
        try {
            new Main().runTest();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void runTest() throws Exception {
        ThreadPoolExecutor tp = new ThreadPoolExecutor(1, 1, 60L, TimeUnit.SECONDS,
                new SynchronousQueue<Runnable>());
        tp.setRejectedExecutionHandler(
                (Runnable r, ThreadPoolExecutor executor) -> System.out.println("Task rejected: " + r));
        Semaphore oneTaskDone = new Semaphore(0);
        tp.execute(() -> {
            System.out.println("Sleeping");
            try {
                Thread.sleep(300);
            } catch (Exception e) {
                e.printStackTrace();
            }
            System.out.println("Done sleeping");
            oneTaskDone.release();
        });
        tp.execute(new Runnable() {
            @Override
            public void run() {
                System.out.println("Never happends");
            }

            @Override
            public String toString() {
                return "Rejected Runnable";
            }
        });
        oneTaskDone.acquire();
        tp.execute(() -> System.out.println("Running"));
        tp.shutdown();
        tp.awaitTermination(100, TimeUnit.MILLISECONDS);
        System.out.println("Finished");
    }
}