Examples with BufferView io.pravega.common.util.BufferView used on opensource projects

Example 66 with BufferView

use of io.pravega.common.util.BufferView in project pravega by pravega.

the class StreamSegmentContainerTests method checkReadIndex.

private static void checkReadIndex(Map<String, ByteArrayOutputStream> segmentContents, Map<String, Long> lengths, Map<String, Long> truncationOffsets, SegmentContainer container) throws Exception {
    waitForOperationsInReadIndex(container);
    for (String segmentName : segmentContents.keySet()) {
        long segmentLength = lengths.get(segmentName);
        long startOffset = truncationOffsets.getOrDefault(segmentName, 0L);
        val si = container.getStreamSegmentInfo(segmentName, TIMEOUT).join();
        Assert.assertEquals("Unexpected Metadata StartOffset for segment " + segmentName, startOffset, si.getStartOffset());
        Assert.assertEquals("Unexpected Metadata Length for segment " + segmentName, segmentLength, si.getLength());
        byte[] expectedData = segmentContents.get(segmentName).toByteArray();
        long expectedCurrentOffset = startOffset;
        @Cleanup ReadResult readResult = container.read(segmentName, expectedCurrentOffset, (int) (segmentLength - startOffset), TIMEOUT).join();
        Assert.assertTrue("Empty read result for segment " + segmentName, readResult.hasNext());
        // A more thorough read check is done in testSegmentRegularOperations; here we just check if the data was merged correctly.
        while (readResult.hasNext()) {
            ReadResultEntry readEntry = readResult.next();
            AssertExtensions.assertGreaterThan("getRequestedReadLength should be a positive integer for segment " + segmentName, 0, readEntry.getRequestedReadLength());
            Assert.assertEquals("Unexpected value from getStreamSegmentOffset for segment " + segmentName, expectedCurrentOffset, readEntry.getStreamSegmentOffset());
            Assert.assertTrue("getContent() did not return a completed future for segment" + segmentName, readEntry.getContent().isDone() && !readEntry.getContent().isCompletedExceptionally());
            Assert.assertNotEquals("Unexpected value for isEndOfStreamSegment for non-sealed segment " + segmentName, ReadResultEntryType.EndOfStreamSegment, readEntry.getType());
            BufferView readEntryContents = readEntry.getContent().join();
            byte[] actualData = readEntryContents.getCopy();
            AssertExtensions.assertArrayEquals("Unexpected data read from segment " + segmentName + " at offset " + expectedCurrentOffset, expectedData, (int) expectedCurrentOffset, actualData, 0, readEntryContents.getLength());
            expectedCurrentOffset += readEntryContents.getLength();
        }
        Assert.assertTrue("ReadResult was not closed post-full-consumption for segment" + segmentName, readResult.isClosed());
    }
}

Example 67 with BufferView

use of io.pravega.common.util.BufferView in project pravega by pravega.

the class StreamSegmentContainerTests method testSegmentSeal.

/**
 * Test the seal operation on StreamSegments. Also tests the behavior of Reads (non-tailing) when encountering
 * the end of a sealed StreamSegment.
 */
@Test
public void testSegmentSeal() throws Exception {
    final int appendsPerSegment = 1;
    @Cleanup TestContext context = createContext();
    context.container.startAsync().awaitRunning();
    // 1. Create the StreamSegments.
    ArrayList<String> segmentNames = createSegments(context);
    HashMap<String, ByteArrayOutputStream> segmentContents = new HashMap<>();
    // 2. Add some appends.
    ArrayList<CompletableFuture<Long>> appendFutures = new ArrayList<>();
    HashMap<String, Long> lengths = new HashMap<>();
    for (String segmentName : segmentNames) {
        ByteArrayOutputStream segmentStream = new ByteArrayOutputStream();
        segmentContents.put(segmentName, segmentStream);
        for (int i = 0; i < appendsPerSegment; i++) {
            ByteArraySegment appendData = getAppendData(segmentName, i);
            appendFutures.add(context.container.append(segmentName, appendData, null, TIMEOUT));
            lengths.put(segmentName, lengths.getOrDefault(segmentName, 0L) + appendData.getLength());
            appendData.copyTo(segmentStream);
        }
    }
    Futures.allOf(appendFutures).get(TIMEOUT.toMillis(), TimeUnit.MILLISECONDS);
    // 3. Seal first half of segments.
    ArrayList<CompletableFuture<Long>> sealFutures = new ArrayList<>();
    for (int i = 0; i < segmentNames.size() / 2; i++) {
        sealFutures.add(context.container.sealStreamSegment(segmentNames.get(i), TIMEOUT));
    }
    Futures.allOf(sealFutures).get(TIMEOUT.toMillis(), TimeUnit.MILLISECONDS);
    // Check that the segments were properly sealed.
    for (int i = 0; i < segmentNames.size(); i++) {
        String segmentName = segmentNames.get(i);
        boolean expectedSealed = i < segmentNames.size() / 2;
        SegmentProperties sp = context.container.getStreamSegmentInfo(segmentName, TIMEOUT).join();
        if (expectedSealed) {
            Assert.assertTrue("Segment is not sealed when it should be " + segmentName, sp.isSealed());
            Assert.assertEquals("Unexpected result from seal() future for segment " + segmentName, sp.getLength(), (long) sealFutures.get(i).join());
            AssertExtensions.assertThrows("Container allowed appending to a sealed segment " + segmentName, context.container.append(segmentName, new ByteArraySegment("foo".getBytes()), null, TIMEOUT)::join, ex -> ex instanceof StreamSegmentSealedException);
        } else {
            Assert.assertFalse("Segment is sealed when it shouldn't be " + segmentName, sp.isSealed());
            // Verify we can still append to these segments.
            byte[] appendData = "foo".getBytes();
            context.container.append(segmentName, new ByteArraySegment(appendData), null, TIMEOUT).join();
            segmentContents.get(segmentName).write(appendData);
            lengths.put(segmentName, lengths.getOrDefault(segmentName, 0L) + appendData.length);
        }
    }
    // 4. Reads (regular reads, not tail reads, and only for the sealed segments).
    waitForOperationsInReadIndex(context.container);
    for (int i = 0; i < segmentNames.size() / 2; i++) {
        String segmentName = segmentNames.get(i);
        long segmentLength = context.container.getStreamSegmentInfo(segmentName, TIMEOUT).join().getLength();
        // Read starting 1 byte from the end - make sure it wont hang at the end by turning into a future read.
        final int totalReadLength = 1;
        long expectedCurrentOffset = segmentLength - totalReadLength;
        @Cleanup ReadResult readResult = context.container.read(segmentName, expectedCurrentOffset, Integer.MAX_VALUE, TIMEOUT).join();
        int readLength = 0;
        while (readResult.hasNext()) {
            ReadResultEntry readEntry = readResult.next();
            if (readEntry.getStreamSegmentOffset() >= segmentLength) {
                Assert.assertEquals("Unexpected value for isEndOfStreamSegment when reaching the end of sealed segment " + segmentName, ReadResultEntryType.EndOfStreamSegment, readEntry.getType());
                AssertExtensions.assertSuppliedFutureThrows("ReadResultEntry.getContent() returned a result when reached the end of sealed segment " + segmentName, readEntry::getContent, ex -> ex instanceof IllegalStateException);
            } else {
                Assert.assertNotEquals("Unexpected value for isEndOfStreamSegment before reaching end of sealed segment " + segmentName, ReadResultEntryType.EndOfStreamSegment, readEntry.getType());
                Assert.assertTrue("getContent() did not return a completed future for segment" + segmentName, readEntry.getContent().isDone() && !readEntry.getContent().isCompletedExceptionally());
                BufferView readEntryContents = readEntry.getContent().join();
                expectedCurrentOffset += readEntryContents.getLength();
                readLength += readEntryContents.getLength();
            }
        }
        Assert.assertEquals("Unexpected number of bytes read.", totalReadLength, readLength);
        Assert.assertTrue("ReadResult was not closed when reaching the end of sealed segment" + segmentName, readResult.isClosed());
    }
    // 5. Writer moving data to Storage.
    waitForSegmentsInStorage(segmentNames, context).get(TIMEOUT.toMillis(), TimeUnit.MILLISECONDS);
    checkStorage(segmentContents, lengths, context);
    context.container.stopAsync().awaitTerminated();
}

Example 68 with BufferView

use of io.pravega.common.util.BufferView in project pravega by pravega.

the class StreamSegmentContainerTests method testConcurrentSegmentActivation.

/**
 * Tests the ability for the StreamSegmentContainer to handle concurrent actions on a Segment that it does not know
 * anything about, and handling the resulting concurrency.
 * Note: this is tested with a single segment. It could be tested with multiple segments, but different segments
 * are mostly independent of each other, so we would not be gaining much by doing so.
 */
@Test
public void testConcurrentSegmentActivation() throws Exception {
    final AttributeId attributeAccumulate = AttributeId.randomUUID();
    final long expectedAttributeValue = APPENDS_PER_SEGMENT + ATTRIBUTE_UPDATES_PER_SEGMENT;
    final int appendLength = 10;
    @Cleanup TestContext context = createContext();
    context.container.startAsync().awaitRunning();
    // 1. Create the StreamSegments.
    String segmentName = createSegments(context).get(0);
    // 2. Add some appends.
    List<CompletableFuture<Void>> opFutures = Collections.synchronizedList(new ArrayList<>());
    AtomicLong expectedLength = new AtomicLong();
    @Cleanup("shutdown") ExecutorService testExecutor = newScheduledThreadPool(Math.min(20, APPENDS_PER_SEGMENT), "testConcurrentSegmentActivation");
    val submitFutures = new ArrayList<Future<?>>();
    for (int i = 0; i < APPENDS_PER_SEGMENT; i++) {
        final byte fillValue = (byte) i;
        submitFutures.add(testExecutor.submit(() -> {
            val attributeUpdates = AttributeUpdateCollection.from(new AttributeUpdate(attributeAccumulate, AttributeUpdateType.Accumulate, 1));
            byte[] appendData = new byte[appendLength];
            Arrays.fill(appendData, (byte) (fillValue + 1));
            opFutures.add(Futures.toVoid(context.container.append(segmentName, new ByteArraySegment(appendData), attributeUpdates, TIMEOUT)));
            expectedLength.addAndGet(appendData.length);
        }));
    }
    // 2.1 Update the attribute.
    for (int i = 0; i < ATTRIBUTE_UPDATES_PER_SEGMENT; i++) {
        submitFutures.add(testExecutor.submit(() -> {
            AttributeUpdateCollection attributeUpdates = AttributeUpdateCollection.from(new AttributeUpdate(attributeAccumulate, AttributeUpdateType.Accumulate, 1));
            opFutures.add(context.container.updateAttributes(segmentName, attributeUpdates, TIMEOUT));
        }));
    }
    // Wait for the submittal of tasks to complete.
    submitFutures.forEach(this::await);
    // Now wait for all the appends to finish.
    Futures.allOf(opFutures).get(TIMEOUT.toMillis(), TimeUnit.MILLISECONDS);
    // 3. getSegmentInfo: verify final state of the attribute.
    SegmentProperties sp = context.container.getStreamSegmentInfo(segmentName, TIMEOUT).join();
    Assert.assertEquals("Unexpected length for segment " + segmentName, expectedLength.get(), sp.getLength());
    Assert.assertFalse("Unexpected value for isDeleted for segment " + segmentName, sp.isDeleted());
    Assert.assertFalse("Unexpected value for isSealed for segment " + segmentName, sp.isDeleted());
    Assert.assertEquals("Unexpected Segment Type.", getSegmentType(segmentName), SegmentType.fromAttributes(sp.getAttributes()));
    // Verify all attribute values.
    Assert.assertEquals("Unexpected value for attribute " + attributeAccumulate + " for segment " + segmentName, expectedAttributeValue, (long) sp.getAttributes().getOrDefault(attributeAccumulate, Attributes.NULL_ATTRIBUTE_VALUE));
    checkActiveSegments(context.container, 1);
    // 4. Written data.
    waitForOperationsInReadIndex(context.container);
    byte[] actualData = new byte[(int) expectedLength.get()];
    int offset = 0;
    @Cleanup ReadResult readResult = context.container.read(segmentName, 0, actualData.length, TIMEOUT).join();
    while (readResult.hasNext()) {
        ReadResultEntry readEntry = readResult.next();
        BufferView readEntryContents = readEntry.getContent().join();
        AssertExtensions.assertLessThanOrEqual("Too much to read.", actualData.length, offset + actualData.length);
        readEntryContents.copyTo(ByteBuffer.wrap(actualData, offset, actualData.length));
        offset += actualData.length;
    }
    Assert.assertEquals("Unexpected number of bytes read.", actualData.length, offset);
    Assert.assertTrue("Unexpected number of bytes read (multiple of appendLength).", actualData.length % appendLength == 0);
    boolean[] observedValues = new boolean[APPENDS_PER_SEGMENT + 1];
    for (int i = 0; i < actualData.length; i += appendLength) {
        byte value = actualData[i];
        Assert.assertFalse("Append with value " + value + " was written multiple times.", observedValues[value]);
        observedValues[value] = true;
        for (int j = 1; j < appendLength; j++) {
            Assert.assertEquals("Append was not written atomically at offset " + (i + j), value, actualData[i + j]);
        }
    }
    // Verify all the appends made it (we purposefully did not write 0, since that's the default fill value in an array).
    Assert.assertFalse("Not expecting 0 as a value.", observedValues[0]);
    for (int i = 1; i < observedValues.length; i++) {
        Assert.assertTrue("Append with value " + i + " was not written.", observedValues[i]);
    }
    context.container.stopAsync().awaitTerminated();
}

Example 69 with BufferView

use of io.pravega.common.util.BufferView in project pravega by pravega.

the class ContainerEventProcessorTests method testReadWithFailingSegment.

/**
 * Test the behavior of the EventProcessor when internal Segment reads fail.
 *
 * @throws Exception
 */
@Test(timeout = 10000)
public void testReadWithFailingSegment() throws Exception {
    DirectSegmentAccess faultySegment = spy(new SegmentMock(this.executorService()));
    Function<String, CompletableFuture<DirectSegmentAccess>> faultySegmentSupplier = s -> CompletableFuture.completedFuture(faultySegment);
    @Cleanup ContainerEventProcessor eventProcessorService = new ContainerEventProcessorImpl(0, faultySegmentSupplier, ITERATION_DELAY, CONTAINER_OPERATION_TIMEOUT, this.executorService());
    int maxItemsProcessed = 10;
    int maxOutstandingBytes = 4 * 1024 * 1024;
    int truncationDataSize = 500;
    ContainerEventProcessor.EventProcessorConfig config = new ContainerEventProcessor.EventProcessorConfig(maxItemsProcessed, maxOutstandingBytes, truncationDataSize);
    ReusableLatch latch = new ReusableLatch();
    Function<List<BufferView>, CompletableFuture<Void>> doNothing = l -> {
        latch.release();
        return CompletableFuture.completedFuture(null);
    };
    // Make the internal Segment of the processor to fail upon a read.
    when(faultySegment.read(anyLong(), anyInt(), any(Duration.class))).thenThrow(IntentionalException.class).thenCallRealMethod();
    @Cleanup ContainerEventProcessor.EventProcessor processor = eventProcessorService.forConsumer("testSegmentMax", doNothing, config).get(TIMEOUT_FUTURE.toSeconds(), TimeUnit.SECONDS);
    // Write an event to make sure that the processor is running and await for it to be processed.
    BufferView event = new ByteArraySegment("Test".getBytes());
    processor.add(event, TIMEOUT_FUTURE).join();
    latch.await();
}

Example 70 with BufferView

use of io.pravega.common.util.BufferView in project pravega by pravega.

the class ContainerEventProcessorTests method testContainerMaxItemsPerBatchRespected.

public static void testContainerMaxItemsPerBatchRespected(ContainerEventProcessor eventProcessorService) throws Exception {
    int maxItemsPerBatch = 10;
    int maxOutstandingBytes = 4 * 1024 * 1024;
    int allEventsToProcess = 1000;
    int truncationDataSize = 500;
    List<Integer> processedItems = new ArrayList<>();
    Function<List<BufferView>, CompletableFuture<Void>> handler = getNumberSequenceHandler(processedItems, maxItemsPerBatch);
    ContainerEventProcessor.EventProcessorConfig config = new ContainerEventProcessor.EventProcessorConfig(maxItemsPerBatch, maxOutstandingBytes, truncationDataSize);
    @Cleanup ContainerEventProcessor.EventProcessor processor = eventProcessorService.forConsumer("testSegment", handler, config).get(TIMEOUT_FUTURE.toSeconds(), TimeUnit.SECONDS);
    // Write all the events as fast as possible.
    for (int i = 0; i < allEventsToProcess; i++) {
        BufferView event = new ByteArraySegment(ByteBuffer.allocate(Integer.BYTES).putInt(i).array());
        processor.add(event, TIMEOUT_FUTURE).join();
    }
    // Perform basic validation on this processor.
    validateProcessorResults(processor, processedItems, allEventsToProcess);
}