Examples with Writer com.linkedin.r2.message.stream.entitystream.Writer used on opensource projects

Example 1 with Writer

use of com.linkedin.r2.message.stream.entitystream.Writer in project rest.li by linkedin.

the class RAPResponseDecoder method channelRead0.

@Override
protected void channelRead0(final ChannelHandlerContext ctx, HttpObject msg) throws Exception {
    if (msg instanceof HttpResponse) {
        HttpResponse m = (HttpResponse) msg;
        _shouldCloseConnection = !HttpUtil.isKeepAlive(m);
        if (HttpUtil.is100ContinueExpected(m)) {
            ctx.writeAndFlush(CONTINUE).addListener(new ChannelFutureListener() {

                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    if (!future.isSuccess()) {
                        ctx.fireExceptionCaught(future.cause());
                    }
                }
            });
        }
        if (!m.decoderResult().isSuccess()) {
            ctx.fireExceptionCaught(m.decoderResult().cause());
            return;
        }
        // remove chunked encoding.
        if (HttpUtil.isTransferEncodingChunked(m)) {
            HttpUtil.setTransferEncodingChunked(m, false);
        }
        Timeout<None> timeout = ctx.channel().attr(TIMEOUT_ATTR_KEY).getAndRemove();
        if (timeout == null) {
            LOG.debug("dropped a response after channel inactive or exception had happened.");
            return;
        }
        final TimeoutBufferedWriter writer = new TimeoutBufferedWriter(ctx, _maxContentLength, BUFFER_HIGH_WATER_MARK, BUFFER_LOW_WATER_MARK, timeout);
        EntityStream entityStream = EntityStreams.newEntityStream(writer);
        _chunkedMessageWriter = writer;
        StreamResponseBuilder builder = new StreamResponseBuilder();
        builder.setStatus(m.status().code());
        for (Map.Entry<String, String> e : m.headers()) {
            String key = e.getKey();
            String value = e.getValue();
            if (key.equalsIgnoreCase(HttpConstants.RESPONSE_COOKIE_HEADER_NAME)) {
                builder.addCookie(value);
            } else {
                builder.unsafeAddHeaderValue(key, value);
            }
        }
        ctx.fireChannelRead(builder.build(entityStream));
    } else if (msg instanceof HttpContent) {
        HttpContent chunk = (HttpContent) msg;
        TimeoutBufferedWriter currentWriter = _chunkedMessageWriter;
        // Sanity check
        if (currentWriter == null) {
            throw new IllegalStateException("received " + HttpContent.class.getSimpleName() + " without " + HttpResponse.class.getSimpleName());
        }
        if (!chunk.decoderResult().isSuccess()) {
            this.exceptionCaught(ctx, chunk.decoderResult().cause());
        }
        currentWriter.processHttpChunk(chunk);
        if (chunk instanceof LastHttpContent) {
            _chunkedMessageWriter = null;
        }
    } else {
        // something must be wrong, but let's proceed so that
        // handler after us has a chance to process it.
        ctx.fireChannelRead(msg);
    }
}

Example 2 with Writer

use of com.linkedin.r2.message.stream.entitystream.Writer in project rest.li by linkedin.

the class TestStreamRequest method testBackPressure.

@Test
public void testBackPressure() throws Exception {
    for (Client client : clients()) {
        final long totalBytes = SMALL_BYTES_NUM;
        TimedBytesWriter writer = new TimedBytesWriter(totalBytes, BYTE);
        EntityStream entityStream = EntityStreams.newEntityStream(writer);
        StreamRequestBuilder builder = new StreamRequestBuilder(Bootstrap.createHttpURI(PORT, RATE_LIMITED_URI));
        StreamRequest request = builder.setMethod("POST").build(entityStream);
        final AtomicInteger status = new AtomicInteger(-1);
        final CountDownLatch latch = new CountDownLatch(1);
        Callback<StreamResponse> callback = expectSuccessCallback(latch, status);
        client.streamRequest(request, callback);
        latch.await(60000, TimeUnit.MILLISECONDS);
        Assert.assertEquals(status.get(), RestStatus.OK);
        TimedBytesReader reader = _rateLimitedRequestHandler.getReader();
        Assert.assertNotNull(reader);
        Assert.assertEquals(totalBytes, reader.getTotalBytes());
        Assert.assertTrue(reader.allBytesCorrect());
        long clientSendTimespan = writer.getStopTime() - writer.getStartTime();
        long serverReceiveTimespan = reader.getStopTime() - reader.getStartTime();
        Assert.assertTrue(serverReceiveTimespan > 1000);
        double diff = Math.abs(serverReceiveTimespan - clientSendTimespan);
        double diffRatio = diff / clientSendTimespan;
        // make it generous to reduce the chance occasional test failures
        Assert.assertTrue(diffRatio < 0.2);
    }
}

Example 3 with Writer

use of com.linkedin.r2.message.stream.entitystream.Writer in project rest.li by linkedin.

the class TestEntityStream method testRaceBetweenDoneAndCancel.

private void testRaceBetweenDoneAndCancel(ExecutorService executor) throws Exception {
    final CountDownLatch startLatch = new CountDownLatch(1);
    final CountDownLatch finishLatch = new CountDownLatch(2);
    final CountDownLatch prepareLatch = new CountDownLatch(2);
    final TestWriter writer = new TestWriter();
    TestObserver observer = new TestObserver();
    final ControlReader reader = new ControlReader();
    EntityStream es = EntityStreams.newEntityStream(writer);
    es.addObserver(observer);
    es.setReader(reader);
    reader.read(1000);
    executor.submit(new Callable<Object>() {

        @Override
        public Object call() throws Exception {
            while (writer.remaining() > 100) {
                writer.write();
            }
            prepareLatch.countDown();
            startLatch.await();
            writer.done();
            finishLatch.countDown();
            return null;
        }
    });
    executor.submit(new Callable<Object>() {

        @Override
        public Object call() throws Exception {
            prepareLatch.countDown();
            startLatch.await();
            reader.cancel();
            finishLatch.countDown();
            return null;
        }
    });
    prepareLatch.await();
    startLatch.countDown();
    Assert.assertTrue(finishLatch.await(1000, TimeUnit.MILLISECONDS));
    // in any case, reader shouldn't fail
    Assert.assertEquals(reader.errorTimes(), 0);
    // if done wins the race
    if (reader.doneTimes() > 0) {
        Assert.assertEquals(reader.doneTimes(), 1);
        Assert.assertEquals(observer.doneTimes(), 1);
        Assert.assertEquals(observer.errorTimes(), 0);
        Assert.assertEquals(writer.abortedTimes(), 0);
    } else // if cancel wins the race
    {
        Assert.assertEquals(observer.doneTimes(), 0);
        Assert.assertEquals(observer.errorTimes(), 1);
        Assert.assertEquals(writer.abortedTimes(), 1);
    }
}

Example 4 with Writer

use of com.linkedin.r2.message.stream.entitystream.Writer in project rest.li by linkedin.

the class TestEntityStream method testObserverThrowRuntimeException.

/**
 * This test will check the correct behavior in case of a Runtime Exception for the observer.
 * Note the Runtime Exception is not the only unchecked exception, and we have to consider also Error
 * which is the other unchecked throwable
 */
@Test
public void testObserverThrowRuntimeException() {
    Observer observer = new TestObserver() {

        @Override
        public void onDone() {
            throw new RuntimeException("broken observer throws");
        }

        @Override
        public void onDataAvailable(ByteString data) {
            throw new RuntimeException("broken observer throws");
        }

        @Override
        public void onError(Throwable ex) {
            throw new RuntimeException("broken observer throws");
        }
    };
    Exception ex = new RuntimeException("writer has problem");
    testObserverThrow(observer, ex);
}

Example 5 with Writer

use of com.linkedin.r2.message.stream.entitystream.Writer in project rest.li by linkedin.

the class TestEntityStream method testObserverThrow.

public void testObserverThrow(Observer observer, Throwable writeError) {
    TestWriter writer = new TestWriter();
    ControlReader reader = new ControlReader();
    EntityStream es = EntityStreams.newEntityStream(writer);
    es.addObserver(observer);
    es.setReader(reader);
    reader.read(1);
    writer.write();
    writer.done();
    writer.error(writeError);
    Assert.assertEquals(writer.abortedTimes(), 0);
    Assert.assertEquals(reader.getChunkCount(), 1);
    Assert.assertEquals(reader.doneTimes(), 1);
    Assert.assertEquals(reader.errorTimes(), 0);
    writer = new TestWriter();
    reader = new ControlReader();
    es = EntityStreams.newEntityStream(writer);
    es.addObserver(observer);
    es.setReader(reader);
    reader.read(1);
    writer.write();
    writer.error(writeError);
    Assert.assertEquals(writer.abortedTimes(), 0);
    Assert.assertEquals(reader.getChunkCount(), 1);
    Assert.assertEquals(reader.errorTimes(), 1);
}