Examples with Session com.developmentontheedge.be5.api.Session used on opensource projects

Example 6 with Session

use of com.developmentontheedge.be5.api.Session in project jetty.project by eclipse.

the class FlowControlStrategyTest method testServerTwoDataFramesWithStalledStream.

// TODO
// Since we changed the API to disallow consecutive data() calls without waiting
// for the callback, it is now not possible to have DATA1, DATA2 in the queue for
// the same stream. Perhaps this test should just be deleted.
@Ignore
@Test
public void testServerTwoDataFramesWithStalledStream() throws Exception {
    // Frames in queue = DATA1, DATA2.
    // Server writes part of DATA1, then stalls.
    // A window update unstalls the session, verify that the data is correctly sent.
    Random random = new Random();
    final byte[] chunk1 = new byte[1024];
    random.nextBytes(chunk1);
    final byte[] chunk2 = new byte[2048];
    random.nextBytes(chunk2);
    // Two SETTINGS frames: the initial after the preface,
    // and the explicit where we set the stream window size to zero.
    final AtomicReference<CountDownLatch> settingsLatch = new AtomicReference<>(new CountDownLatch(2));
    final CountDownLatch dataLatch = new CountDownLatch(1);
    start(new ServerSessionListener.Adapter() {

        @Override
        public void onSettings(Session session, SettingsFrame frame) {
            settingsLatch.get().countDown();
        }

        @Override
        public Stream.Listener onNewStream(Stream stream, HeadersFrame frame) {
            stream.data(new DataFrame(stream.getId(), ByteBuffer.wrap(chunk1), false), Callback.NOOP);
            stream.data(new DataFrame(stream.getId(), ByteBuffer.wrap(chunk2), true), Callback.NOOP);
            dataLatch.countDown();
            return null;
        }
    });
    Session session = newClient(new Session.Listener.Adapter());
    Map<Integer, Integer> settings = new HashMap<>();
    settings.put(SettingsFrame.INITIAL_WINDOW_SIZE, 0);
    session.settings(new SettingsFrame(settings, false), Callback.NOOP);
    Assert.assertTrue(settingsLatch.get().await(5, TimeUnit.SECONDS));
    byte[] content = new byte[chunk1.length + chunk2.length];
    final ByteBuffer buffer = ByteBuffer.wrap(content);
    MetaData.Request metaData = newRequest("GET", new HttpFields());
    HeadersFrame requestFrame = new HeadersFrame(metaData, null, true);
    final CountDownLatch responseLatch = new CountDownLatch(1);
    session.newStream(requestFrame, new Promise.Adapter<>(), new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
            buffer.put(frame.getData());
            callback.succeeded();
            if (frame.isEndStream())
                responseLatch.countDown();
        }
    });
    Assert.assertTrue(dataLatch.await(5, TimeUnit.SECONDS));
    // Now we have the 2 DATA frames queued in the server.
    // Unstall the stream window.
    settingsLatch.set(new CountDownLatch(1));
    settings.clear();
    settings.put(SettingsFrame.INITIAL_WINDOW_SIZE, chunk1.length / 2);
    session.settings(new SettingsFrame(settings, false), Callback.NOOP);
    Assert.assertTrue(settingsLatch.get().await(5, TimeUnit.SECONDS));
    Assert.assertTrue(responseLatch.await(5, TimeUnit.SECONDS));
    // Check that the data is sent correctly.
    byte[] expected = new byte[content.length];
    System.arraycopy(chunk1, 0, expected, 0, chunk1.length);
    System.arraycopy(chunk2, 0, expected, chunk1.length, chunk2.length);
    Assert.assertArrayEquals(expected, content);
}

Example 7 with Session

use of com.developmentontheedge.be5.api.Session in project jetty.project by eclipse.

the class FlowControlStrategyTest method testServerFlowControlOneBigWrite.

@Test
public void testServerFlowControlOneBigWrite() throws Exception {
    final int windowSize = 1536;
    final int length = 5 * windowSize;
    final CountDownLatch settingsLatch = new CountDownLatch(1);
    start(new ServerSessionListener.Adapter() {

        @Override
        public void onSettings(Session session, SettingsFrame frame) {
            settingsLatch.countDown();
        }

        @Override
        public Stream.Listener onNewStream(Stream stream, HeadersFrame requestFrame) {
            MetaData.Response metaData = new MetaData.Response(HttpVersion.HTTP_2, 200, new HttpFields());
            HeadersFrame responseFrame = new HeadersFrame(stream.getId(), metaData, null, false);
            CompletableFuture<Void> completable = new CompletableFuture<>();
            stream.headers(responseFrame, Callback.from(completable));
            completable.thenRun(() -> {
                DataFrame dataFrame = new DataFrame(stream.getId(), ByteBuffer.allocate(length), true);
                stream.data(dataFrame, Callback.NOOP);
            });
            return null;
        }
    });
    Session session = newClient(new Session.Listener.Adapter());
    Map<Integer, Integer> settings = new HashMap<>();
    settings.put(SettingsFrame.INITIAL_WINDOW_SIZE, windowSize);
    session.settings(new SettingsFrame(settings, false), Callback.NOOP);
    Assert.assertTrue(settingsLatch.await(5, TimeUnit.SECONDS));
    final CountDownLatch dataLatch = new CountDownLatch(1);
    final Exchanger<Callback> exchanger = new Exchanger<>();
    MetaData.Request metaData = newRequest("GET", new HttpFields());
    HeadersFrame requestFrame = new HeadersFrame(metaData, null, true);
    session.newStream(requestFrame, new Promise.Adapter<>(), new Stream.Listener.Adapter() {

        private AtomicInteger dataFrames = new AtomicInteger();

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
            try {
                int dataFrames = this.dataFrames.incrementAndGet();
                if (dataFrames == 1 || dataFrames == 2) {
                    // Do not consume the data frame.
                    // We should then be flow-control stalled.
                    exchanger.exchange(callback);
                } else if (dataFrames == 3 || dataFrames == 4 || dataFrames == 5) {
                    // Consume totally.
                    callback.succeeded();
                    if (frame.isEndStream())
                        dataLatch.countDown();
                } else {
                    Assert.fail();
                }
            } catch (InterruptedException x) {
                callback.failed(x);
            }
        }
    });
    Callback callback = exchanger.exchange(null, 5, TimeUnit.SECONDS);
    checkThatWeAreFlowControlStalled(exchanger);
    // Consume the first chunk.
    callback.succeeded();
    callback = exchanger.exchange(null, 5, TimeUnit.SECONDS);
    checkThatWeAreFlowControlStalled(exchanger);
    // Consume the second chunk.
    callback.succeeded();
    Assert.assertTrue(dataLatch.await(5, TimeUnit.SECONDS));
}

Example 8 with Session

use of com.developmentontheedge.be5.api.Session in project jetty.project by eclipse.

the class FlowControlStrategyTest method testClientFlowControlOneBigWrite.

@Test
public void testClientFlowControlOneBigWrite() throws Exception {
    final int windowSize = 1536;
    final Exchanger<Callback> exchanger = new Exchanger<>();
    final CountDownLatch settingsLatch = new CountDownLatch(1);
    final CountDownLatch dataLatch = new CountDownLatch(1);
    start(new ServerSessionListener.Adapter() {

        @Override
        public Map<Integer, Integer> onPreface(Session session) {
            Map<Integer, Integer> settings = new HashMap<>();
            settings.put(SettingsFrame.INITIAL_WINDOW_SIZE, windowSize);
            return settings;
        }

        @Override
        public Stream.Listener onNewStream(Stream stream, HeadersFrame requestFrame) {
            MetaData.Response metaData = new MetaData.Response(HttpVersion.HTTP_2, 200, new HttpFields());
            HeadersFrame responseFrame = new HeadersFrame(stream.getId(), metaData, null, true);
            stream.headers(responseFrame, Callback.NOOP);
            return new Stream.Listener.Adapter() {

                private AtomicInteger dataFrames = new AtomicInteger();

                @Override
                public void onData(Stream stream, DataFrame frame, Callback callback) {
                    try {
                        int dataFrames = this.dataFrames.incrementAndGet();
                        if (dataFrames == 1 || dataFrames == 2) {
                            // Do not consume the data frame.
                            // We should then be flow-control stalled.
                            exchanger.exchange(callback);
                        } else if (dataFrames == 3 || dataFrames == 4 || dataFrames == 5) {
                            // Consume totally.
                            callback.succeeded();
                            if (frame.isEndStream())
                                dataLatch.countDown();
                        } else {
                            Assert.fail();
                        }
                    } catch (InterruptedException x) {
                        callback.failed(x);
                    }
                }
            };
        }
    });
    Session session = newClient(new Session.Listener.Adapter() {

        @Override
        public void onSettings(Session session, SettingsFrame frame) {
            settingsLatch.countDown();
        }
    });
    Assert.assertTrue(settingsLatch.await(5, TimeUnit.SECONDS));
    MetaData.Request metaData = newRequest("GET", new HttpFields());
    HeadersFrame requestFrame = new HeadersFrame(metaData, null, false);
    FuturePromise<Stream> streamPromise = new FuturePromise<>();
    session.newStream(requestFrame, streamPromise, null);
    Stream stream = streamPromise.get(5, TimeUnit.SECONDS);
    final int length = 5 * windowSize;
    DataFrame dataFrame = new DataFrame(stream.getId(), ByteBuffer.allocate(length), true);
    stream.data(dataFrame, Callback.NOOP);
    Callback callback = exchanger.exchange(null, 5, TimeUnit.SECONDS);
    checkThatWeAreFlowControlStalled(exchanger);
    // Consume the first chunk.
    callback.succeeded();
    callback = exchanger.exchange(null, 5, TimeUnit.SECONDS);
    checkThatWeAreFlowControlStalled(exchanger);
    // Consume the second chunk.
    callback.succeeded();
    Assert.assertTrue(dataLatch.await(5, TimeUnit.SECONDS));
}

Example 9 with Session

use of com.developmentontheedge.be5.api.Session in project jetty.project by eclipse.

the class FlowControlStrategyTest method testSessionStalledStallsNewStreams.

@Test
public void testSessionStalledStallsNewStreams() throws Exception {
    final int windowSize = 1024;
    start(new ServerSessionListener.Adapter() {

        @Override
        public Stream.Listener onNewStream(Stream stream, HeadersFrame requestFrame) {
            MetaData.Request request = (MetaData.Request) requestFrame.getMetaData();
            if ("POST".equalsIgnoreCase(request.getMethod())) {
                // Send data to consume most of the session window.
                ByteBuffer data = ByteBuffer.allocate(FlowControlStrategy.DEFAULT_WINDOW_SIZE - windowSize);
                DataFrame dataFrame = new DataFrame(stream.getId(), data, true);
                stream.data(dataFrame, Callback.NOOP);
                return null;
            } else {
                // For every stream, send down half the window size of data.
                MetaData.Response metaData = new MetaData.Response(HttpVersion.HTTP_2, 200, new HttpFields());
                HeadersFrame responseFrame = new HeadersFrame(stream.getId(), metaData, null, false);
                Callback.Completable completable = new Callback.Completable();
                stream.headers(responseFrame, completable);
                completable.thenRun(() -> {
                    DataFrame dataFrame = new DataFrame(stream.getId(), ByteBuffer.allocate(windowSize / 2), true);
                    stream.data(dataFrame, Callback.NOOP);
                });
                return null;
            }
        }
    });
    Session session = newClient(new Session.Listener.Adapter());
    // First request is just to consume most of the session window.
    final List<Callback> callbacks1 = new ArrayList<>();
    final CountDownLatch prepareLatch = new CountDownLatch(1);
    MetaData.Request request1 = newRequest("POST", new HttpFields());
    session.newStream(new HeadersFrame(request1, null, true), new Promise.Adapter<>(), new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
            // Do not consume the data to reduce the session window.
            callbacks1.add(callback);
            if (frame.isEndStream())
                prepareLatch.countDown();
        }
    });
    Assert.assertTrue(prepareLatch.await(5, TimeUnit.SECONDS));
    // Second request will consume half of the remaining the session window.
    MetaData.Request request2 = newRequest("GET", new HttpFields());
    session.newStream(new HeadersFrame(request2, null, true), new Promise.Adapter<>(), new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
        // Do not consume it to stall flow control.
        }
    });
    // Third request will consume the whole session window, which is now stalled.
    // A fourth request will not be able to receive data.
    MetaData.Request request3 = newRequest("GET", new HttpFields());
    session.newStream(new HeadersFrame(request3, null, true), new Promise.Adapter<>(), new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
        // Do not consume it to stall flow control.
        }
    });
    // Fourth request is now stalled.
    final CountDownLatch latch = new CountDownLatch(1);
    MetaData.Request request4 = newRequest("GET", new HttpFields());
    session.newStream(new HeadersFrame(request4, null, true), new Promise.Adapter<>(), new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
            callback.succeeded();
            if (frame.isEndStream())
                latch.countDown();
        }
    });
    // Verify that the data does not arrive because the server session is stalled.
    Assert.assertFalse(latch.await(1, TimeUnit.SECONDS));
    // This will open up the session window, allowing the fourth stream to send data.
    for (Callback callback : callbacks1) callback.succeeded();
    Assert.assertTrue(latch.await(5, TimeUnit.SECONDS));
}

Example 10 with Session

use of com.developmentontheedge.be5.api.Session in project jetty.project by eclipse.

the class FlowControlStrategyTest method testClientSendingInitialSmallWindow.

@Test
public void testClientSendingInitialSmallWindow() throws Exception {
    start(new ServerSessionListener.Adapter() {

        @Override
        public Stream.Listener onNewStream(Stream stream, HeadersFrame frame) {
            MetaData metaData = new MetaData.Response(HttpVersion.HTTP_2, 200, new HttpFields());
            HeadersFrame responseFrame = new HeadersFrame(stream.getId(), metaData, null, false);
            Callback.Completable completable = new Callback.Completable();
            stream.headers(responseFrame, completable);
            return new Stream.Listener.Adapter() {

                @Override
                public void onData(Stream stream, DataFrame frame, Callback callback) {
                    // Since we echo back the data
                    // asynchronously we must copy it.
                    ByteBuffer data = frame.getData();
                    ByteBuffer copy = ByteBuffer.allocateDirect(data.remaining());
                    copy.put(data).flip();
                    completable.thenRun(() -> stream.data(new DataFrame(stream.getId(), copy, frame.isEndStream()), callback));
                }
            };
        }
    });
    final int initialWindow = 16;
    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, initialWindow);
            return settings;
        }
    });
    byte[] requestData = new byte[initialWindow * 4];
    new Random().nextBytes(requestData);
    byte[] responseData = new byte[requestData.length];
    final ByteBuffer responseContent = ByteBuffer.wrap(responseData);
    MetaData.Request metaData = newRequest("GET", new HttpFields());
    HeadersFrame requestFrame = new HeadersFrame(metaData, null, false);
    Promise.Completable<Stream> completable = new Promise.Completable<>();
    final CountDownLatch latch = new CountDownLatch(1);
    session.newStream(requestFrame, completable, new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
            responseContent.put(frame.getData());
            callback.succeeded();
            if (frame.isEndStream())
                latch.countDown();
        }
    });
    completable.thenAccept(stream -> {
        ByteBuffer requestContent = ByteBuffer.wrap(requestData);
        DataFrame dataFrame = new DataFrame(stream.getId(), requestContent, true);
        stream.data(dataFrame, Callback.NOOP);
    });
    Assert.assertTrue(latch.await(5, TimeUnit.SECONDS));
    responseContent.flip();
    Assert.assertArrayEquals(requestData, responseData);
}