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

Example 11 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 12 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);
}

Example 13 with Writer

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

the class TestEntityStream method testReaderInitError.

@Test
public void testReaderInitError() throws Exception {
    final CountDownLatch latch = new CountDownLatch(1);
    final TestWriter writer = new TestWriter();
    TestObserver observer = new TestObserver();
    final EntityStream es = EntityStreams.newEntityStream(writer);
    es.addObserver(observer);
    final ControlReader reader = new ControlReader() {

        @Override
        public void onInit(ReadHandle rh) {
            throw new RuntimeException();
        }
    };
    ExecutorService executor = Executors.newFixedThreadPool(1);
    executor.submit(new Runnable() {

        @Override
        public void run() {
            es.setReader(reader);
            latch.countDown();
        }
    });
    Assert.assertTrue(latch.await(1000, TimeUnit.MILLISECONDS));
    Assert.assertEquals(reader.errorTimes(), 1);
    Assert.assertEquals(observer.errorTimes(), 1);
    Assert.assertEquals(writer.abortedTimes(), 1);
}

Example 14 with Writer

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

the class TestEntityStream method testRaceBetweenAbnormalAbortAndCancel.

private void testRaceBetweenAbnormalAbortAndCancel(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() {

        @Override
        public void onDataAvailable(ByteString data) {
            try {
                prepareLatch.countDown();
                startLatch.await();
            } catch (Exception ex) {
            // ...
            }
            throw new RuntimeException("broken reader throws");
        }
    };
    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() > 0) {
                writer.write();
            }
            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));
    // we should always fail because cancel on reader side wouldn't cause cancel action if
    // writer is already in the writing process
    Assert.assertEquals(writer.abortedTimes(), 1);
    Assert.assertEquals(observer.errorTimes(), 1);
    Assert.assertEquals(observer.getChunkCount(), 1);
    Assert.assertEquals(observer.getLastEvent(), "onError");
    Assert.assertEquals(reader.errorTimes(), 1);
    Assert.assertEquals(reader.getChunkCount(), 0);
}

Example 15 with Writer

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

the class TestEntityStream method testReaderThrow.

public void testReaderThrow(ControlReader readerOnData, ControlReader readerOnDone, ControlReader readerOnError, Throwable writerProblem) {
    TestWriter writer = new TestWriter();
    TestObserver observer = new TestObserver();
    EntityStream es = EntityStreams.newEntityStream(writer);
    es.addObserver(observer);
    es.setReader(readerOnData);
    readerOnData.read(1);
    writer.write();
    writer.done();
    Assert.assertEquals(writer.abortedTimes(), 1);
    Assert.assertEquals(observer.getChunkCount(), 1);
    Assert.assertEquals(observer.errorTimes(), 1);
    Assert.assertEquals(observer.doneTimes(), 0);
    Assert.assertEquals(readerOnData.getChunkCount(), 1);
    Assert.assertEquals(readerOnData.errorTimes(), 1);
    Assert.assertEquals(readerOnData.doneTimes(), 0);
    writer = new TestWriter();
    observer = new TestObserver();
    es = EntityStreams.newEntityStream(writer);
    es.addObserver(observer);
    es.setReader(readerOnDone);
    readerOnDone.read(1);
    writer.write();
    writer.done();
    Assert.assertEquals(writer.abortedTimes(), 1);
    Assert.assertEquals(observer.getChunkCount(), 1);
    Assert.assertEquals(observer.doneTimes(), 1);
    Assert.assertEquals(observer.errorTimes(), 0);
    Assert.assertEquals(readerOnDone.getChunkCount(), 1);
    Assert.assertEquals(readerOnDone.doneTimes(), 1);
    Assert.assertEquals(readerOnDone.errorTimes(), 0);
    writer = new TestWriter();
    observer = new TestObserver();
    es = EntityStreams.newEntityStream(writer);
    es.addObserver(observer);
    es.setReader(readerOnError);
    readerOnError.read(1);
    writer.write();
    writer.error(writerProblem);
    Assert.assertEquals(writer.abortedTimes(), 1);
    Assert.assertEquals(observer.getChunkCount(), 1);
    Assert.assertEquals(observer.doneTimes(), 0);
    Assert.assertEquals(observer.errorTimes(), 1);
    Assert.assertEquals(readerOnError.getChunkCount(), 1);
    Assert.assertEquals(readerOnError.doneTimes(), 0);
    Assert.assertEquals(readerOnError.errorTimes(), 1);
}