CountDownLatch简单用法

public abstract class ControllerCenter implements Runnable {

    private CountDownLatch countDown;

    private String controllerCenterName;

    private boolean result;

    public ControllerCenter(CountDownLatch countDown, String controllerCenterName) {
        this.countDown = countDown;
        this.controllerCenterName = controllerCenterName;
        this.result = false;
    }

    @Override
    public void run() {
        try {
            check();
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
            result = false;
        } finally {
            if (countDown != null) {
                countDown.countDown();
            }
        }
    }

    /**
     * 子类重写
     * @return
     */
    protected abstract void check();

    public CountDownLatch getCountDown() {
        return countDown;
    }

    public void setCountDown(CountDownLatch countDown) {
        this.countDown = countDown;
    }

    public String getControllerCenterName() {
        return controllerCenterName;
    }

    public void setControllerCenterName(String controllerCenterName) {
        this.controllerCenterName = controllerCenterName;
    }

    public boolean isResult() {
        return result;
    }

    public void setResult(boolean result) {
        this.result = result;
    }
}

public class AControllerCenter extends ControllerCenter {

    public AControllerCenter(CountDownLatch countDown) {
        super(countDown, "AControllerCenter");
    }

    @Override
    protected void check() {
        System.out.println("is check [" + "A" + "] now");
        try {
            Thread.sleep(2000);
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("is check [" + "A" + "] success");
    }
}

public class BControllerCenter extends ControllerCenter {

    public BControllerCenter(CountDownLatch countDown) {
        super(countDown, "BControllerCenter");
    }

    @Override
    protected void check() {
        System.out.println("is check [" + "B" + "] now");
        try {
            Thread.sleep(5000);
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("is check [" + "B" + "] success");
    }
}

public class CheckSuccessTest {

    private static List controllerCenterList;

    private static CountDownLatch countDown;

    public CheckSuccessTest() {
    }

    public static boolean checkAll() throws Exception {
        countDown = new CountDownLatch(2);

        controllerCenterList = new ArrayList<>();
        controllerCenterList.add(new AControllerCenter(countDown));
        controllerCenterList.add(new BControllerCenter(countDown));

        Executor pool = Executors.newFixedThreadPool(2);
        for (ControllerCenter key : controllerCenterList) {
            pool.execute(key);
        }

        countDown.await();

        for (ControllerCenter key : controllerCenterList) {
            if (!key.isResult()) {
                return false;
            }
        }
        return true;
    }

    public static void main(String[] args) throws Exception {
        System.out.println("All Controller result is = [" + CheckSuccessTest.checkAll() + "]");
    }
}