Examples with AsyncContext javax.servlet.AsyncContext used on opensource projects

Example 66 with AsyncContext

use of javax.servlet.AsyncContext in project blade by biezhi.

the class AsyncDispatcherServlet method service.

@Override
protected void service(HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws ServletException, IOException {
    LOGGER.debug("AsyncLongRunningServlet Start::Name={} :: ID={}", Thread.currentThread().getName(), Thread.currentThread().getId());
    httpRequest.setCharacterEncoding(blade.encoding());
    httpResponse.setCharacterEncoding(blade.encoding());
    httpResponse.setHeader("X-Powered-By", "Blade(" + Const.VERSION + ")");
    httpRequest.setAttribute("org.apache.catalina.ASYNC_SUPPORTED", true);
    AsyncContext asyncContext = httpRequest.startAsync();
    asyncContext.addListener(new BladeAsyncListener());
    asyncContext.setTimeout(asyncContextTimeout);
    executor.execute(new AsyncRequestProcessor(asyncContext, dispatcherHandler));
}

Example 67 with AsyncContext

use of javax.servlet.AsyncContext in project jetty.project by eclipse.

the class AsyncEchoServlet method service.

@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    AsyncContext asyncContext = request.startAsync(request, response);
    asyncContext.setTimeout(0);
    Echoer echoer = new Echoer(asyncContext);
    request.getInputStream().setReadListener(echoer);
    response.getOutputStream().setWriteListener(echoer);
}

Example 68 with AsyncContext

use of javax.servlet.AsyncContext in project jetty.project by eclipse.

the class StreamResetTest method testResetAfterAsyncRequestBlockingWriteStalledByFlowControl.

@Test
public void testResetAfterAsyncRequestBlockingWriteStalledByFlowControl() throws Exception {
    int windowSize = FlowControlStrategy.DEFAULT_WINDOW_SIZE;
    CountDownLatch writeLatch = new CountDownLatch(1);
    start(new HttpServlet() {

        @Override
        protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            AsyncContext asyncContext = request.startAsync();
            asyncContext.start(() -> {
                try {
                    // Make sure we are in async wait before writing.
                    Thread.sleep(1000);
                    response.getOutputStream().write(new byte[10 * windowSize]);
                    asyncContext.complete();
                } catch (IOException x) {
                    writeLatch.countDown();
                } catch (Throwable x) {
                    x.printStackTrace();
                }
            });
        }
    });
    Deque<Object> dataQueue = new ArrayDeque<>();
    AtomicLong received = new AtomicLong();
    CountDownLatch latch = new CountDownLatch(1);
    Session client = newClient(new Session.Listener.Adapter());
    MetaData.Request request = newRequest("GET", new HttpFields());
    HeadersFrame frame = new HeadersFrame(request, null, true);
    FuturePromise<Stream> promise = new FuturePromise<>();
    client.newStream(frame, promise, new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
            dataQueue.offer(frame);
            dataQueue.offer(callback);
            // Do not consume the data yet.
            if (received.addAndGet(frame.getData().remaining()) == windowSize)
                latch.countDown();
        }
    });
    Stream stream = promise.get(5, TimeUnit.SECONDS);
    Assert.assertTrue(latch.await(5, TimeUnit.SECONDS));
    // Reset and consume.
    stream.reset(new ResetFrame(stream.getId(), ErrorCode.CANCEL_STREAM_ERROR.code), Callback.NOOP);
    dataQueue.stream().filter(item -> item instanceof Callback).map(item -> (Callback) item).forEach(Callback::succeeded);
    Assert.assertTrue(writeLatch.await(5, TimeUnit.SECONDS));
}

Example 69 with AsyncContext

use of javax.servlet.AsyncContext in project jetty.project by eclipse.

the class StreamResetTest method testAsyncWriteAfterStreamReceivingReset.

@Test
public void testAsyncWriteAfterStreamReceivingReset() throws Exception {
    final CountDownLatch resetLatch = new CountDownLatch(1);
    final CountDownLatch dataLatch = new CountDownLatch(1);
    start(new HttpServlet() {

        @Override
        protected void doGet(HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException {
            Charset charset = StandardCharsets.UTF_8;
            final ByteBuffer data = ByteBuffer.wrap("AFTER RESET".getBytes(charset));
            response.setStatus(200);
            response.setContentType("text/plain;charset=" + charset.name());
            response.setContentLength(data.remaining());
            response.flushBuffer();
            try {
                // Wait for the reset to happen.
                Assert.assertTrue(resetLatch.await(5, TimeUnit.SECONDS));
                // Wait for the reset to arrive to the server and be processed.
                Thread.sleep(1000);
            } catch (InterruptedException x) {
                throw new InterruptedIOException();
            }
            // Write some content asynchronously after the stream has been reset.
            final AsyncContext context = request.startAsync();
            new Thread() {

                @Override
                public void run() {
                    try {
                        // Wait for the request thread to exit
                        // doGet() so this is really asynchronous.
                        Thread.sleep(1000);
                        HttpOutput output = (HttpOutput) response.getOutputStream();
                        output.sendContent(data, new Callback() {

                            @Override
                            public void failed(Throwable x) {
                                context.complete();
                                dataLatch.countDown();
                            }
                        });
                    } catch (Throwable x) {
                        x.printStackTrace();
                    }
                }
            }.start();
        }
    });
    Session client = newClient(new Session.Listener.Adapter());
    MetaData.Request request = newRequest("GET", new HttpFields());
    HeadersFrame frame = new HeadersFrame(request, null, true);
    client.newStream(frame, new FuturePromise<>(), new Stream.Listener.Adapter() {

        @Override
        public void onHeaders(Stream stream, HeadersFrame frame) {
            stream.reset(new ResetFrame(stream.getId(), ErrorCode.CANCEL_STREAM_ERROR.code), Callback.NOOP);
            resetLatch.countDown();
        }
    });
    Assert.assertTrue(dataLatch.await(5, TimeUnit.SECONDS));
}

Example 70 with AsyncContext

use of javax.servlet.AsyncContext in project jetty.project by eclipse.

the class StreamResetTest method testResetAfterAsyncRequestAsyncWriteStalledByFlowControl.

@Test
public void testResetAfterAsyncRequestAsyncWriteStalledByFlowControl() throws Exception {
    int windowSize = FlowControlStrategy.DEFAULT_WINDOW_SIZE;
    CountDownLatch writeLatch = new CountDownLatch(1);
    start(new HttpServlet() {

        @Override
        protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            AsyncContext asyncContext = request.startAsync();
            ServletOutputStream output = response.getOutputStream();
            output.setWriteListener(new WriteListener() {

                private boolean written;

                @Override
                public void onWritePossible() throws IOException {
                    while (output.isReady()) {
                        if (written) {
                            asyncContext.complete();
                            break;
                        } else {
                            output.write(new byte[10 * windowSize]);
                            written = true;
                        }
                    }
                }

                @Override
                public void onError(Throwable t) {
                    writeLatch.countDown();
                }
            });
        }
    });
    Deque<Callback> dataQueue = new ArrayDeque<>();
    AtomicLong received = new AtomicLong();
    CountDownLatch latch = new CountDownLatch(1);
    Session client = newClient(new Session.Listener.Adapter());
    MetaData.Request request = newRequest("GET", new HttpFields());
    HeadersFrame frame = new HeadersFrame(request, null, true);
    FuturePromise<Stream> promise = new FuturePromise<>();
    client.newStream(frame, promise, new Stream.Listener.Adapter() {

        @Override
        public void onData(Stream stream, DataFrame frame, Callback callback) {
            dataQueue.offer(callback);
            // Do not consume the data yet.
            if (received.addAndGet(frame.getData().remaining()) == windowSize)
                latch.countDown();
        }
    });
    Stream stream = promise.get(5, TimeUnit.SECONDS);
    Assert.assertTrue(latch.await(5, TimeUnit.SECONDS));
    // Reset and consume.
    stream.reset(new ResetFrame(stream.getId(), ErrorCode.CANCEL_STREAM_ERROR.code), Callback.NOOP);
    dataQueue.forEach(Callback::succeeded);
    Assert.assertTrue(writeLatch.await(5, TimeUnit.SECONDS));
}