Examples with BufferingFlowControlStrategy org.eclipse.jetty.http2.BufferingFlowControlStrategy used on opensource projects

Example 1 with BufferingFlowControlStrategy

use of org.eclipse.jetty.http2.BufferingFlowControlStrategy in project jetty.project by eclipse.

the class FlowControlStalledTest method testSessionStalledIsInvokedOnlyOnce.

@Test
public void testSessionStalledIsInvokedOnlyOnce() throws Exception {
    AtomicReference<CountDownLatch> stallLatch = new AtomicReference<>(new CountDownLatch(1));
    CountDownLatch unstallLatch = new CountDownLatch(1);
    start(() -> new BufferingFlowControlStrategy(0.5f) {

        @Override
        public void onSessionStalled(ISession session) {
            super.onSessionStalled(session);
            stallLatch.get().countDown();
        }

        @Override
        protected void onSessionUnstalled(ISession session) {
            super.onSessionUnstalled(session);
            unstallLatch.countDown();
        }
    }, new ServerSessionListener.Adapter() {

        @Override
        public Stream.Listener onNewStream(Stream stream, HeadersFrame frame) {
            MetaData.Request request = (MetaData.Request) frame.getMetaData();
            MetaData.Response response = new MetaData.Response(HttpVersion.HTTP_2, HttpStatus.OK_200, new HttpFields());
            if (request.getURIString().endsWith("/stall")) {
                stream.headers(new HeadersFrame(stream.getId(), response, null, false), new Callback() {

                    @Override
                    public void succeeded() {
                        // Send a large chunk of data so the session gets stalled.
                        ByteBuffer data = ByteBuffer.allocate(FlowControlStrategy.DEFAULT_WINDOW_SIZE + 1);
                        stream.data(new DataFrame(stream.getId(), data, true), NOOP);
                    }
                });
            } else {
                stream.headers(new HeadersFrame(stream.getId(), response, null, true), Callback.NOOP);
            }
            return null;
        }
    });
    // Use a large stream window so that only the session gets stalled.
    client.setInitialStreamRecvWindow(5 * FlowControlStrategy.DEFAULT_WINDOW_SIZE);
    Session session = newClient(new Session.Listener.Adapter() {

        @Override
        public Map<Integer, Integer> onPreface(Session session) {
            Map<Integer, Integer> settings = new HashMap<>();
            settings.put(SettingsFrame.INITIAL_WINDOW_SIZE, client.getInitialStreamRecvWindow());
            return settings;
        }
    });
    CountDownLatch latch = new CountDownLatch(1);
    Queue<Callback> callbacks = new ArrayDeque<>();
    MetaData.Request request = newRequest("GET", "/stall", new HttpFields());
    session.newStream(new HeadersFrame(request, null, true), new Promise.Adapter<>(), new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
            callbacks.offer(callback);
            if (frame.isEndStream())
                latch.countDown();
        }
    });
    Assert.assertTrue(stallLatch.get().await(5, TimeUnit.SECONDS));
    // The session is now stalled, check that writing a second stream
    // does not result in the session be notified again of being stalled.
    stallLatch.set(new CountDownLatch(1));
    request = newRequest("GET", "/", new HttpFields());
    session.newStream(new HeadersFrame(request, null, true), new Promise.Adapter<>(), new Stream.Listener.Adapter());
    Assert.assertFalse(stallLatch.get().await(1, TimeUnit.SECONDS));
    // Consume all data.
    while (!latch.await(10, TimeUnit.MILLISECONDS)) {
        Callback callback = callbacks.poll();
        if (callback != null)
            callback.succeeded();
    }
    // Make sure the unstall callback is invoked.
    Assert.assertTrue(unstallLatch.await(5, TimeUnit.SECONDS));
}

Example 2 with BufferingFlowControlStrategy

use of org.eclipse.jetty.http2.BufferingFlowControlStrategy in project jetty.project by eclipse.

the class FlowControlStalledTest method testStreamStalledIsInvokedOnlyOnce.

@Test
public void testStreamStalledIsInvokedOnlyOnce() throws Exception {
    AtomicReference<CountDownLatch> stallLatch = new AtomicReference<>(new CountDownLatch(1));
    CountDownLatch unstallLatch = new CountDownLatch(1);
    start(() -> new BufferingFlowControlStrategy(0.5f) {

        @Override
        public void onStreamStalled(IStream stream) {
            super.onStreamStalled(stream);
            stallLatch.get().countDown();
        }

        @Override
        protected void onStreamUnstalled(IStream stream) {
            super.onStreamUnstalled(stream);
            unstallLatch.countDown();
        }
    }, new ServerSessionListener.Adapter() {

        @Override
        public Stream.Listener onNewStream(Stream stream, HeadersFrame frame) {
            MetaData.Request request = (MetaData.Request) frame.getMetaData();
            MetaData.Response response = new MetaData.Response(HttpVersion.HTTP_2, HttpStatus.OK_200, new HttpFields());
            if (request.getURIString().endsWith("/stall")) {
                stream.headers(new HeadersFrame(stream.getId(), response, null, false), new Callback() {

                    @Override
                    public void succeeded() {
                        // Send a large chunk of data so the stream gets stalled.
                        ByteBuffer data = ByteBuffer.allocate(FlowControlStrategy.DEFAULT_WINDOW_SIZE + 1);
                        stream.data(new DataFrame(stream.getId(), data, true), NOOP);
                    }
                });
            } else {
                stream.headers(new HeadersFrame(stream.getId(), response, null, true), Callback.NOOP);
            }
            return null;
        }
    });
    // Use a large session window so that only the stream gets stalled.
    client.setInitialSessionRecvWindow(5 * FlowControlStrategy.DEFAULT_WINDOW_SIZE);
    Session client = newClient(new Session.Listener.Adapter());
    CountDownLatch latch = new CountDownLatch(1);
    Queue<Callback> callbacks = new ArrayDeque<>();
    MetaData.Request request = newRequest("GET", "/stall", new HttpFields());
    client.newStream(new HeadersFrame(request, null, true), new Promise.Adapter<>(), new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
            callbacks.offer(callback);
            if (frame.isEndStream())
                latch.countDown();
        }
    });
    Assert.assertTrue(stallLatch.get().await(5, TimeUnit.SECONDS));
    // First stream is now stalled, check that writing a second stream
    // does not result in the first be notified again of being stalled.
    stallLatch.set(new CountDownLatch(1));
    request = newRequest("GET", "/", new HttpFields());
    client.newStream(new HeadersFrame(request, null, true), new Promise.Adapter<>(), new Stream.Listener.Adapter());
    Assert.assertFalse(stallLatch.get().await(1, TimeUnit.SECONDS));
    // Consume all data.
    while (!latch.await(10, TimeUnit.MILLISECONDS)) {
        Callback callback = callbacks.poll();
        if (callback != null)
            callback.succeeded();
    }
    // Make sure the unstall callback is invoked.
    Assert.assertTrue(unstallLatch.await(5, TimeUnit.SECONDS));
}