| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.http2.client; |
| |
| import java.net.InetSocketAddress; |
| import java.nio.ByteBuffer; |
| import java.util.ArrayDeque; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Queue; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.eclipse.jetty.http.HostPortHttpField; |
| import org.eclipse.jetty.http.HttpFields; |
| import org.eclipse.jetty.http.HttpScheme; |
| import org.eclipse.jetty.http.HttpStatus; |
| import org.eclipse.jetty.http.HttpVersion; |
| import org.eclipse.jetty.http.MetaData; |
| import org.eclipse.jetty.http2.BufferingFlowControlStrategy; |
| import org.eclipse.jetty.http2.FlowControlStrategy; |
| import org.eclipse.jetty.http2.ISession; |
| import org.eclipse.jetty.http2.IStream; |
| import org.eclipse.jetty.http2.api.Session; |
| import org.eclipse.jetty.http2.api.Stream; |
| import org.eclipse.jetty.http2.api.server.ServerSessionListener; |
| import org.eclipse.jetty.http2.frames.DataFrame; |
| import org.eclipse.jetty.http2.frames.HeadersFrame; |
| import org.eclipse.jetty.http2.frames.SettingsFrame; |
| import org.eclipse.jetty.http2.server.RawHTTP2ServerConnectionFactory; |
| import org.eclipse.jetty.server.HttpConfiguration; |
| import org.eclipse.jetty.server.Server; |
| import org.eclipse.jetty.server.ServerConnector; |
| import org.eclipse.jetty.toolchain.test.TestTracker; |
| import org.eclipse.jetty.util.Callback; |
| import org.eclipse.jetty.util.FuturePromise; |
| import org.eclipse.jetty.util.Promise; |
| import org.eclipse.jetty.util.thread.QueuedThreadPool; |
| import org.junit.After; |
| import org.junit.Assert; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| public class FlowControlStalledTest |
| { |
| @Rule |
| public TestTracker tracker = new TestTracker(); |
| protected ServerConnector connector; |
| protected HTTP2Client client; |
| protected Server server; |
| |
| protected void start(FlowControlStrategy.Factory flowControlFactory, ServerSessionListener listener) throws Exception |
| { |
| QueuedThreadPool serverExecutor = new QueuedThreadPool(); |
| serverExecutor.setName("server"); |
| server = new Server(serverExecutor); |
| RawHTTP2ServerConnectionFactory connectionFactory = new RawHTTP2ServerConnectionFactory(new HttpConfiguration(), listener); |
| connectionFactory.setFlowControlStrategyFactory(flowControlFactory); |
| connector = new ServerConnector(server, connectionFactory); |
| server.addConnector(connector); |
| server.start(); |
| |
| client = new HTTP2Client(); |
| QueuedThreadPool clientExecutor = new QueuedThreadPool(); |
| clientExecutor.setName("client"); |
| client.setExecutor(clientExecutor); |
| client.setFlowControlStrategyFactory(flowControlFactory); |
| client.start(); |
| } |
| |
| protected Session newClient(Session.Listener listener) throws Exception |
| { |
| String host = "localhost"; |
| int port = connector.getLocalPort(); |
| InetSocketAddress address = new InetSocketAddress(host, port); |
| FuturePromise<Session> promise = new FuturePromise<>(); |
| client.connect(address, listener, promise); |
| return promise.get(5, TimeUnit.SECONDS); |
| } |
| |
| protected MetaData.Request newRequest(String method, String target, HttpFields fields) |
| { |
| String host = "localhost"; |
| int port = connector.getLocalPort(); |
| String authority = host + ":" + port; |
| return new MetaData.Request(method, HttpScheme.HTTP, new HostPortHttpField(authority), target, HttpVersion.HTTP_2, fields); |
| } |
| |
| @After |
| public void dispose() throws Exception |
| { |
| // Allow WINDOW_UPDATE frames to be sent/received to avoid exception stack traces. |
| Thread.sleep(1000); |
| client.stop(); |
| server.stop(); |
| } |
| |
| @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)); |
| } |
| |
| @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)); |
| } |
| } |