Examples with Action0 rx.functions.Action0 used on opensource projects

Example 41 with Action0

use of rx.functions.Action0 in project Hystrix by Netflix.

the class HystrixUtilizationStreamTest method testTwoSubscribersOneUnsubscribes.

@Test
public void testTwoSubscribersOneUnsubscribes() throws Exception {
    final CountDownLatch latch1 = new CountDownLatch(1);
    final CountDownLatch latch2 = new CountDownLatch(1);
    final AtomicInteger payloads1 = new AtomicInteger(0);
    final AtomicInteger payloads2 = new AtomicInteger(0);
    Subscription s1 = stream.observe().take(100).doOnUnsubscribe(new Action0() {

        @Override
        public void call() {
            latch1.countDown();
        }
    }).subscribe(new Subscriber<HystrixUtilization>() {

        @Override
        public void onCompleted() {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 1 OnCompleted");
            latch1.countDown();
        }

        @Override
        public void onError(Throwable e) {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 1 OnError : " + e);
            latch1.countDown();
        }

        @Override
        public void onNext(HystrixUtilization utilization) {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 1 OnNext : " + utilization);
            payloads1.incrementAndGet();
        }
    });
    Subscription s2 = stream.observe().take(100).doOnUnsubscribe(new Action0() {

        @Override
        public void call() {
            latch2.countDown();
        }
    }).subscribe(new Subscriber<HystrixUtilization>() {

        @Override
        public void onCompleted() {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 2 OnCompleted");
            latch2.countDown();
        }

        @Override
        public void onError(Throwable e) {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 2 OnError : " + e);
            latch2.countDown();
        }

        @Override
        public void onNext(HystrixUtilization utilization) {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 2 OnNext : " + utilization);
            payloads2.incrementAndGet();
        }
    });
    // execute 1 command, then unsubscribe from first stream. then execute the rest
    for (int i = 0; i < 50; i++) {
        HystrixCommand<Integer> cmd = Command.from(groupKey, commandKey, HystrixEventType.SUCCESS, 50);
        cmd.execute();
        if (i == 1) {
            s1.unsubscribe();
        }
    }
    assertTrue(latch1.await(10000, TimeUnit.MILLISECONDS));
    assertTrue(latch2.await(10000, TimeUnit.MILLISECONDS));
    System.out.println("s1 got : " + payloads1.get() + ", s2 got : " + payloads2.get());
    assertTrue("s1 got data", payloads1.get() > 0);
    assertTrue("s2 got data", payloads2.get() > 0);
    assertTrue("s1 got less data than s2", payloads2.get() > payloads1.get());
}

Example 42 with Action0

use of rx.functions.Action0 in project Hystrix by Netflix.

the class HystrixUtilizationStreamTest method testTwoSubscribersBothUnsubscribe.

@Test
public void testTwoSubscribersBothUnsubscribe() throws Exception {
    final CountDownLatch latch1 = new CountDownLatch(1);
    final CountDownLatch latch2 = new CountDownLatch(1);
    final AtomicInteger payloads1 = new AtomicInteger(0);
    final AtomicInteger payloads2 = new AtomicInteger(0);
    Subscription s1 = stream.observe().take(100).doOnUnsubscribe(new Action0() {

        @Override
        public void call() {
            latch1.countDown();
        }
    }).subscribe(new Subscriber<HystrixUtilization>() {

        @Override
        public void onCompleted() {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 1 OnCompleted");
            latch1.countDown();
        }

        @Override
        public void onError(Throwable e) {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 1 OnError : " + e);
            latch1.countDown();
        }

        @Override
        public void onNext(HystrixUtilization utilization) {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 1 OnNext : " + utilization);
            payloads1.incrementAndGet();
        }
    });
    Subscription s2 = stream.observe().take(100).doOnUnsubscribe(new Action0() {

        @Override
        public void call() {
            latch2.countDown();
        }
    }).subscribe(new Subscriber<HystrixUtilization>() {

        @Override
        public void onCompleted() {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 2 OnCompleted");
            latch2.countDown();
        }

        @Override
        public void onError(Throwable e) {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 2 OnError : " + e);
            latch2.countDown();
        }

        @Override
        public void onNext(HystrixUtilization utilization) {
            System.out.println(System.currentTimeMillis() + " : " + Thread.currentThread().getName() + " : Dashboard 2 OnNext : " + utilization);
            payloads2.incrementAndGet();
        }
    });
    // execute 2 commands, then unsubscribe from both streams, then execute the rest
    for (int i = 0; i < 10; i++) {
        HystrixCommand<Integer> cmd = Command.from(groupKey, commandKey, HystrixEventType.SUCCESS, 50);
        cmd.execute();
        if (i == 2) {
            s1.unsubscribe();
            s2.unsubscribe();
        }
    }
    // both subscriptions have been cancelled - source should be too
    assertFalse(stream.isSourceCurrentlySubscribed());
    assertTrue(latch1.await(10000, TimeUnit.MILLISECONDS));
    assertTrue(latch2.await(10000, TimeUnit.MILLISECONDS));
    System.out.println("s1 got : " + payloads1.get() + ", s2 got : " + payloads2.get());
    assertTrue("s1 got data", payloads1.get() > 0);
    assertTrue("s2 got data", payloads2.get() > 0);
}

Example 43 with Action0

use of rx.functions.Action0 in project Hystrix by Netflix.

the class HystrixCollapserTest method testEarlyUnsubscribeExecutedViaToObservable.

@Test
public void testEarlyUnsubscribeExecutedViaToObservable() throws Exception {
    TestCollapserTimer timer = new TestCollapserTimer();
    HystrixCollapser<List<String>, String, String> collapser1 = new TestRequestCollapser(timer, 1);
    Observable<String> response1 = collapser1.toObservable();
    HystrixCollapser<List<String>, String, String> collapser2 = new TestRequestCollapser(timer, 2);
    Observable<String> response2 = collapser2.toObservable();
    final CountDownLatch latch1 = new CountDownLatch(1);
    final CountDownLatch latch2 = new CountDownLatch(1);
    final AtomicReference<String> value1 = new AtomicReference<String>(null);
    final AtomicReference<String> value2 = new AtomicReference<String>(null);
    Subscription s1 = response1.doOnUnsubscribe(new Action0() {

        @Override
        public void call() {
            System.out.println(System.currentTimeMillis() + " : s1 Unsubscribed!");
            latch1.countDown();
        }
    }).subscribe(new Subscriber<String>() {

        @Override
        public void onCompleted() {
            System.out.println(System.currentTimeMillis() + " : s1 OnCompleted");
            latch1.countDown();
        }

        @Override
        public void onError(Throwable e) {
            System.out.println(System.currentTimeMillis() + " : s1 OnError : " + e);
            latch1.countDown();
        }

        @Override
        public void onNext(String s) {
            System.out.println(System.currentTimeMillis() + " : s1 OnNext : " + s);
            value1.set(s);
        }
    });
    Subscription s2 = response2.doOnUnsubscribe(new Action0() {

        @Override
        public void call() {
            System.out.println(System.currentTimeMillis() + " : s2 Unsubscribed!");
            latch2.countDown();
        }
    }).subscribe(new Subscriber<String>() {

        @Override
        public void onCompleted() {
            System.out.println(System.currentTimeMillis() + " : s2 OnCompleted");
            latch2.countDown();
        }

        @Override
        public void onError(Throwable e) {
            System.out.println(System.currentTimeMillis() + " : s2 OnError : " + e);
            latch2.countDown();
        }

        @Override
        public void onNext(String s) {
            System.out.println(System.currentTimeMillis() + " : s2 OnNext : " + s);
            value2.set(s);
        }
    });
    s1.unsubscribe();
    // let time pass that equals the default delay/period
    timer.incrementTime(10);
    assertTrue(latch1.await(1000, TimeUnit.MILLISECONDS));
    assertTrue(latch2.await(1000, TimeUnit.MILLISECONDS));
    assertNull(value1.get());
    assertEquals("2", value2.get());
    System.out.println("ReqLog : " + HystrixRequestLog.getCurrentRequest().getExecutedCommandsAsString());
    assertEquals(1, HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().size());
    HystrixCollapserMetrics metrics = collapser1.getMetrics();
    assertSame(metrics, collapser2.getMetrics());
    HystrixInvokableInfo<?> command = HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().iterator().next();
    // 1 should have been removed from batch
    assertEquals(1, command.getNumberCollapsed());
}

Example 44 with Action0

use of rx.functions.Action0 in project Hystrix by Netflix.

the class HystrixCollapserTest method testEarlyUnsubscribeExecutedViaObserve.

@Test
public void testEarlyUnsubscribeExecutedViaObserve() throws Exception {
    TestCollapserTimer timer = new TestCollapserTimer();
    HystrixCollapser<List<String>, String, String> collapser1 = new TestRequestCollapser(timer, 1);
    Observable<String> response1 = collapser1.observe();
    HystrixCollapser<List<String>, String, String> collapser2 = new TestRequestCollapser(timer, 2);
    Observable<String> response2 = collapser2.observe();
    final CountDownLatch latch1 = new CountDownLatch(1);
    final CountDownLatch latch2 = new CountDownLatch(1);
    final AtomicReference<String> value1 = new AtomicReference<String>(null);
    final AtomicReference<String> value2 = new AtomicReference<String>(null);
    Subscription s1 = response1.doOnUnsubscribe(new Action0() {

        @Override
        public void call() {
            System.out.println(System.currentTimeMillis() + " : s1 Unsubscribed!");
            latch1.countDown();
        }
    }).subscribe(new Subscriber<String>() {

        @Override
        public void onCompleted() {
            System.out.println(System.currentTimeMillis() + " : s1 OnCompleted");
            latch1.countDown();
        }

        @Override
        public void onError(Throwable e) {
            System.out.println(System.currentTimeMillis() + " : s1 OnError : " + e);
            latch1.countDown();
        }

        @Override
        public void onNext(String s) {
            System.out.println(System.currentTimeMillis() + " : s1 OnNext : " + s);
            value1.set(s);
        }
    });
    Subscription s2 = response2.doOnUnsubscribe(new Action0() {

        @Override
        public void call() {
            System.out.println(System.currentTimeMillis() + " : s2 Unsubscribed!");
            latch2.countDown();
        }
    }).subscribe(new Subscriber<String>() {

        @Override
        public void onCompleted() {
            System.out.println(System.currentTimeMillis() + " : s2 OnCompleted");
            latch2.countDown();
        }

        @Override
        public void onError(Throwable e) {
            System.out.println(System.currentTimeMillis() + " : s2 OnError : " + e);
            latch2.countDown();
        }

        @Override
        public void onNext(String s) {
            System.out.println(System.currentTimeMillis() + " : s2 OnNext : " + s);
            value2.set(s);
        }
    });
    s1.unsubscribe();
    // let time pass that equals the default delay/period
    timer.incrementTime(10);
    assertTrue(latch1.await(1000, TimeUnit.MILLISECONDS));
    assertTrue(latch2.await(1000, TimeUnit.MILLISECONDS));
    assertNull(value1.get());
    assertEquals("2", value2.get());
    System.out.println("ReqLog : " + HystrixRequestLog.getCurrentRequest().getExecutedCommandsAsString());
    assertEquals(1, HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().size());
    HystrixCollapserMetrics metrics = collapser1.getMetrics();
    assertSame(metrics, collapser2.getMetrics());
    HystrixInvokableInfo<?> command = HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().iterator().next();
    // 1 should have been removed from batch
    assertEquals(1, command.getNumberCollapsed());
}

Example 45 with Action0

use of rx.functions.Action0 in project CustomViews by AndroidStudy233.

the class RxSchedulerActivity method changeScheduler.

/**
 * 在不指定线程的情况下， RxJava 遵循的是线程不变的原则，即：在哪个线程调用 subscribe()，就在哪个线程生产事件；
 * 在哪个线程生产事件，就在哪个线程消费事件。如果需要切换线程，就需要用到 Scheduler （调度器）。
 * <p>
 * Schedulers.immediate(): 直接在当前线程运行，相当于不指定线程。这是默认的 Scheduler。
 * <p>
 * Schedulers.newThread(): 总是启用新线程，并在新线程执行操作。
 * <p>
 * Schedulers.io(): I/O 操作（读写文件、读写数据库、网络信息交互等）所使用的 Scheduler。
 * 行为模式和 newThread() 差不多，区别在于 io() 的内部实现是是用一个无数量上限的线程池，
 * 可以重用空闲的线程，因此多数情况下 io() 比 newThread() 更有效率。不要把计算工作放在 io() 中，可以避免创建不必要的线程。
 * <p>
 * Schedulers.computation(): 计算所使用的 Scheduler。这个计算指的是 CPU 密集型计算，即不会被 I/O 等操作限制性能的操作，
 * 例如图形的计算。这个 Scheduler 使用的固定的线程池，大小为 CPU 核数。不要把 I/O 操作放在 computation() 中，否则 I/O 操作的等待时间会浪费 CPU。
 * <p>
 * 另外， Android 还有一个专用的 AndroidSchedulers.mainThread()，它指定的操作将在 Android 主线程运行。
 * 有了这几个 Scheduler ，就可以使用 subscribeOn() 和 observeOn() 两个方法来对线程进行控制了。
 * <p>
 * subscribeOn(): 指定 subscribe() 所发生的线程，即 Observable.OnSubscribe 被激活时所处的线程。或者叫做事件产生的线程。 (我的理解是被观察者事件创建))
 * <p>
 * observeOn(): 指定 Subscriber 所运行在的线程。或者叫做事件消费的线程。(我的理解是观察者的事件触发)
 */
public void changeScheduler() {
    Observable.just(1, 2, 3, 4).subscribeOn(// 指定 subscribe() 发生在 IO 线程
    Schedulers.io()).observeOn(// 指定 Subscriber 的回调发生在主线程()
    AndroidSchedulers.mainThread()).subscribe(new Action1<Integer>() {

        @Override
        public void call(Integer number) {
            Log.d("aaa", "number:" + number);
        }
    });
    // doOnSubscribe, 就像subscriber的onstart()方法, 但是onstart不能确定是在哪儿执行的,
    // 所以会有线程问题, 然而doOnSubscribe后面可以指定线程
    // 当然相对应的还有doOnNext().
    Observable.just(1, 2, 3, 4).subscribeOn(Schedulers.io()).doOnSubscribe(new Action0() {

        @Override
        public void call() {
        // 比如有这么个操作需要在主线程执行
        // progressBar.setVisibility(View.VISIBLE);
        }
    }).subscribeOn(// 指定doOnSubscribe的操作在主线程
    AndroidSchedulers.mainThread()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Action1<Integer>() {

        @Override
        public void call(Integer integer) {
        // 比如这里又要隐藏
        // progressBar.setVisibility(View.INVISIBLE);
        }
    });
    Observable.create(new Observable.OnSubscribe<Drawable>() {

        @Override
        public void call(Subscriber<? super Drawable> subscriber) {
            try {
                // 这里线程由subscribeOn决定
                Thread.sleep(10 * 1000);
                Drawable drawable = getResources().getDrawable(R.drawable.pic_sample);
                subscriber.onNext(drawable);
                subscriber.onCompleted();
            } catch (InterruptedException e) {
                e.printStackTrace();
                subscriber.onError(e);
            }
        }
    }).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Observer<Drawable>() {

        // 以下线程由observeOn决定
        @Override
        public void onCompleted() {
            Log.e("GG", "onCompleted");
        }

        @Override
        public void onError(Throwable e) {
            Log.e("GG", e.getMessage());
        }

        @Override
        public void onNext(Drawable drawable) {
            imageView.setImageDrawable(drawable);
        }
    });
}