Package com.alibaba.otter.shared.common.utils.lock

Examples of com.alibaba.otter.shared.common.utils.lock.BooleanMutex

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*/
public class BooleanMutexTest extends BaseOtterTest {

    @Test
    public void test_init_true() {
        BooleanMutex mutex = new BooleanMutex(true);
        try {
            mutex.get(); // 不会被阻塞
        } catch (InterruptedException e) {
            want.fail();
        }
    }
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        }
    }

    @Test
    public void test_init_false() {
        final BooleanMutex mutex = new BooleanMutex(false);
        try {
            final CountDownLatch count = new CountDownLatch(1);
            ExecutorService executor = Executors.newCachedThreadPool();

            executor.submit(new Callable() {

                public Object call() throws Exception {
                    Thread.sleep(1000);
                    mutex.set(true);
                    count.countDown();
                    return null;
                }
            });

            mutex.get(); // 会被阻塞，等异步线程释放锁对象
            count.await();
            executor.shutdown();
        } catch (InterruptedException e) {
            want.fail();
        }
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    }

    @Test
    public void test_concurrent_true() {
        try {
            final BooleanMutex mutex = new BooleanMutex(true);
            final CountDownLatch count = new CountDownLatch(10);
            ExecutorService executor = Executors.newCachedThreadPool();

            for (int i = 0; i < 10; i++) {
                executor.submit(new Callable() {

                    public Object call() throws Exception {
                        mutex.get();
                        count.countDown();
                        return null;
                    }
                });
            }
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    }

    @Test
    public void test_concurrent_false() {
        try {
            final BooleanMutex mutex = new BooleanMutex(false);// 初始为false
            final CountDownLatch count = new CountDownLatch(10);
            ExecutorService executor = Executors.newCachedThreadPool();

            for (int i = 0; i < 10; i++) {
                executor.submit(new Callable() {

                    public Object call() throws Exception {
                        mutex.get();// 被阻塞
                        count.countDown();
                        return null;
                    }
                });
            }
            Thread.sleep(1000);
            mutex.set(true);
            count.await();
            executor.shutdown();
        } catch (InterruptedException e) {
            want.fail();
        }
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        if (isOwner()) {// 锁重入
            return;
        }

        BooleanMutex mutex = new BooleanMutex();
        acquireLock(mutex);

        mutex.get();
        // 避免zookeeper重启后导致watcher丢失，会出现死锁使用了超时进行重试
        // try {
        // mutex.get(DEFAULT_TIMEOUT_PERIOD, TimeUnit.MILLISECONDS);// 阻塞等待值为true
        // } catch (TimeoutException e) {
        // if (!mutex.state()) {
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Related Classes of com.alibaba.otter.shared.common.utils.lock.BooleanMutex

  • com.alibaba.otter.shared.arbitrate.impl.zookeeper.lock.DistributedLock
  • com.alibaba.otter.shared.common.utils.BooleanMutexTest
  • java.util.concurrent.TimeoutException
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