get Simple ExecutorService - Java java.util.concurrent

Java examples for java.util.concurrent:ExecutorService

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Description

get Simple ExecutorService

Demo Code


//package com.java2s;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

public class Main {
    public static void main(String[] argv) throws Exception {
        int poolSize = 2;
        System.out.println(getSimpleService(poolSize));
    }//w w  w . ja  va 2s.c  om

    public static final ExecutorService getSimpleService(int poolSize) {
        final ExecutorService executorService = Executors
                .newFixedThreadPool(poolSize);
        addShutdownHook(executorService);
        return executorService;
    }

    private static void addShutdownHook(
            final ExecutorService executorService) {
        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                shutdown(executorService);
            }
        });
    }

    public static void shutdown(final ExecutorService executorService) {
        executorService.shutdown();
        try {
            int timeToWait = 30;
            if (!executorService.awaitTermination(timeToWait,
                    TimeUnit.SECONDS)) {
                List<Runnable> executionList = executorService
                        .shutdownNow();
                for (Runnable runnable : executionList) {
                    System.out.println("Trying to shutdown task: "
                            + runnable);
                }
            }
            if (!executorService.awaitTermination(timeToWait,
                    TimeUnit.SECONDS)) {
            }
        } catch (InterruptedException ex) {
            executorService.shutdownNow();
            Thread.currentThread().interrupt();
        }
    }
}

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