Examples with ReadSegment io.pravega.shared.protocol.netty.WireCommands.ReadSegment used on opensource projects

Example 1 with ReadSegment

use of io.pravega.shared.protocol.netty.WireCommands.ReadSegment in project pravega by pravega.

the class ReadTest method testReceivingReadCall.

@Test(timeout = 10000)
public void testReceivingReadCall() throws Exception {
    String segmentName = "testReceivingReadCall";
    int entries = 10;
    byte[] data = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
    StreamSegmentStore segmentStore = SERVICE_BUILDER.createStreamSegmentService();
    // fill segment store with 10 entries; the total data size is 100 bytes.
    fillStoreForSegment(segmentName, data, entries, segmentStore);
    @Cleanup EmbeddedChannel channel = AppendTest.createChannel(segmentStore);
    ByteBuf actual = Unpooled.buffer(entries * data.length);
    while (actual.writerIndex() < actual.capacity()) {
        SegmentRead result = (SegmentRead) AppendTest.sendRequest(channel, new ReadSegment(segmentName, actual.writerIndex(), 10000, "", 1L));
        assertEquals(segmentName, result.getSegment());
        assertEquals(result.getOffset(), actual.writerIndex());
        assertFalse(result.isEndOfSegment());
        actual.writeBytes(result.getData());
        // release the ByteBuf and ensure it is deallocated.
        assertTrue(result.getData().release());
        if (actual.writerIndex() < actual.capacity()) {
            // Prevent entering a tight loop by giving the store a bit of time to process al the appends internally
            // before trying again.
            Thread.sleep(10);
        } else {
            // Verify the last read result has the the atTail flag set to true.
            assertTrue(result.isAtTail());
            // mark the channel as finished
            assertFalse(channel.finish());
        }
    }
    ByteBuf expected = Unpooled.buffer(entries * data.length);
    for (int i = 0; i < entries; i++) {
        expected.writeBytes(data);
    }
    expected.writerIndex(expected.capacity()).resetReaderIndex();
    actual.writerIndex(actual.capacity()).resetReaderIndex();
    assertEquals(expected, actual);
    // Release the ByteBuf and ensure it is deallocated.
    assertTrue(actual.release());
    assertTrue(expected.release());
}

Example 2 with ReadSegment

use of io.pravega.shared.protocol.netty.WireCommands.ReadSegment in project pravega by pravega.

the class CommandEncoderTest method testFlushing.

@Test
public void testFlushing() throws Exception {
    UnpooledByteBufAllocator allocator = new UnpooledByteBufAllocator(false, false);
    CommandEncoder commandEncoder = new CommandEncoder(s -> new TestBatchSizeTracker(0), new TestMetricNotifier());
    verifyFlush(commandEncoder, allocator, new Hello(1, 2));
    verifyFlush(commandEncoder, allocator, new KeepAlive());
    UUID uuid = new UUID(1, 2);
    verifyFlush(commandEncoder, allocator, new SetupAppend(1, uuid, "segment", ""));
    verifyFlush(commandEncoder, allocator, new Append("segment", uuid, 1L, new Event(allocator.buffer()), 1L));
    allocator = new UnpooledByteBufAllocator(false, false);
    commandEncoder = new CommandEncoder(s -> new TestBatchSizeTracker(1000), new TestMetricNotifier());
    verifyFlush(commandEncoder, allocator, new Hello(1, 2));
    verifyFlush(commandEncoder, allocator, new KeepAlive());
    verifyFlush(commandEncoder, allocator, new SetupAppend(1, uuid, "segment", ""));
    ByteBuf buffer = allocator.buffer();
    verifyNoFlush(commandEncoder, allocator, new Append("segment", uuid, 1L, new Event(buffer), 1L));
    buffer = allocator.buffer();
    buffer.writeBytes(new byte[400]);
    verifyNoFlush(commandEncoder, allocator, new Append("segment", uuid, 2L, new Event(buffer), 1L));
    buffer = allocator.buffer();
    buffer.writeBytes(new byte[400]);
    verifyNoFlush(commandEncoder, allocator, new Append("segment", uuid, 3L, new Event(buffer), 1L));
    buffer = allocator.buffer();
    buffer.writeBytes(new byte[400]);
    verifyFlush(commandEncoder, allocator, new Append("segment", uuid, 4L, new Event(buffer), 1L));
    buffer = allocator.buffer();
    buffer.writeBytes(new byte[400]);
    verifyNoFlush(commandEncoder, allocator, new Append("segment", uuid, 5L, new Event(buffer), 1L));
    verifyFlush(commandEncoder, allocator, new ReadSegment("segment", 0, 1000, "", 2L));
}

Example 3 with ReadSegment

use of io.pravega.shared.protocol.netty.WireCommands.ReadSegment in project pravega by pravega.

the class PravegaRequestProcessor method readSegment.

// endregion
// region RequestProcessor Implementation
@Override
public void readSegment(ReadSegment readSegment) {
    Timer timer = new Timer();
    final String segment = readSegment.getSegment();
    final String operation = "readSegment";
    if (!verifyToken(segment, readSegment.getOffset(), readSegment.getDelegationToken(), operation)) {
        return;
    }
    final int readSize = min(MAX_READ_SIZE, max(TYPE_PLUS_LENGTH_SIZE, readSegment.getSuggestedLength()));
    long trace = LoggerHelpers.traceEnter(log, operation, readSegment);
    segmentStore.read(segment, readSegment.getOffset(), readSize, TIMEOUT).thenAccept(readResult -> {
        LoggerHelpers.traceLeave(log, operation, trace, readResult);
        handleReadResult(readSegment, readResult);
        this.statsRecorder.readComplete(timer.getElapsed());
    }).exceptionally(ex -> handleException(readSegment.getRequestId(), segment, readSegment.getOffset(), operation, wrapCancellationException(ex)));
}

Example 4 with ReadSegment

use of io.pravega.shared.protocol.netty.WireCommands.ReadSegment in project pravega by pravega.

the class PravegaRequestProcessor method handleReadResult.

/**
 * Handles a readResult.
 * If there are cached entries that can be returned without blocking only these are returned.
 * Otherwise the call will request the data and setup a callback to return the data when it is available.
 * If no data is available but it was detected that the Segment had been truncated beyond the current offset,
 * an appropriate message is sent back over the connection.
 */
private void handleReadResult(ReadSegment request, ReadResult result) {
    String segment = request.getSegment();
    ArrayList<BufferView> cachedEntries = new ArrayList<>();
    ReadResultEntry nonCachedEntry = collectCachedEntries(request.getOffset(), result, cachedEntries);
    final String operation = "readSegment";
    boolean truncated = nonCachedEntry != null && nonCachedEntry.getType() == Truncated;
    boolean endOfSegment = nonCachedEntry != null && nonCachedEntry.getType() == EndOfStreamSegment;
    boolean atTail = nonCachedEntry != null && nonCachedEntry.getType() == Future;
    if (!cachedEntries.isEmpty() || endOfSegment) {
        // We managed to collect some data. Send it.
        ByteBuf data = toByteBuf(cachedEntries);
        SegmentRead reply = new SegmentRead(segment, request.getOffset(), atTail, endOfSegment, data, request.getRequestId());
        connection.send(reply);
        this.statsRecorder.read(segment, reply.getData().readableBytes());
    } else if (truncated) {
        // We didn't collect any data, instead we determined that the current read offset was truncated.
        // Determine the current Start Offset and send that back.
        segmentStore.getStreamSegmentInfo(segment, TIMEOUT).thenAccept(info -> connection.send(new SegmentIsTruncated(request.getRequestId(), segment, info.getStartOffset(), EMPTY_STACK_TRACE, nonCachedEntry.getStreamSegmentOffset()))).exceptionally(e -> handleException(request.getRequestId(), segment, nonCachedEntry.getStreamSegmentOffset(), operation, wrapCancellationException(e)));
    } else {
        Preconditions.checkState(nonCachedEntry != null, "No ReadResultEntries returned from read!?");
        nonCachedEntry.requestContent(TIMEOUT);
        nonCachedEntry.getContent().thenAccept(contents -> {
            ByteBuf data = toByteBuf(Collections.singletonList(contents));
            SegmentRead reply = new SegmentRead(segment, nonCachedEntry.getStreamSegmentOffset(), atTail, endOfSegment, data, request.getRequestId());
            connection.send(reply);
            this.statsRecorder.read(segment, reply.getData().readableBytes());
        }).exceptionally(exception -> {
            Throwable e = Exceptions.unwrap(exception);
            if (e instanceof StreamSegmentTruncatedException) {
                // The Segment may have been truncated in Storage after we got this entry but before we managed
                // to make a read. In that case, send the appropriate error back.
                final String clientReplyStackTrace = replyWithStackTraceOnError ? e.getMessage() : EMPTY_STACK_TRACE;
                connection.send(new SegmentIsTruncated(request.getRequestId(), segment, ((StreamSegmentTruncatedException) e).getStartOffset(), clientReplyStackTrace, nonCachedEntry.getStreamSegmentOffset()));
            } else {
                handleException(request.getRequestId(), segment, nonCachedEntry.getStreamSegmentOffset(), operation, wrapCancellationException(e));
            }
            return null;
        }).exceptionally(e -> handleException(request.getRequestId(), segment, nonCachedEntry.getStreamSegmentOffset(), operation, wrapCancellationException(e)));
    }
}

Example 5 with ReadSegment

use of io.pravega.shared.protocol.netty.WireCommands.ReadSegment in project pravega by pravega.

the class FailingRequestProcessorTest method testEverythingThrows.

@Test
public void testEverythingThrows() {
    assertThrows(IllegalStateException.class, () -> rp.hello(new Hello(0, 0)));
    assertThrows(IllegalStateException.class, () -> rp.setupAppend(new SetupAppend(0, null, "", "")));
    assertThrows(IllegalStateException.class, () -> rp.append(new Append("", null, 0, EMPTY_EVENT, 0)));
    assertThrows(IllegalStateException.class, () -> rp.readSegment(new ReadSegment("", 0, 0, "", 0)));
    assertThrows(IllegalStateException.class, () -> rp.updateSegmentAttribute(new UpdateSegmentAttribute(0, "", null, 0, 0, "")));
    assertThrows(IllegalStateException.class, () -> rp.getSegmentAttribute(new GetSegmentAttribute(0, "", null, "")));
    assertThrows(IllegalStateException.class, () -> rp.getStreamSegmentInfo(new WireCommands.GetStreamSegmentInfo(0, "", "")));
    assertThrows(IllegalStateException.class, () -> rp.createSegment(new CreateSegment(0, "", (byte) 0, 0, "", 0)));
    assertThrows(IllegalStateException.class, () -> rp.updateSegmentPolicy(new UpdateSegmentPolicy(0, "", (byte) 0, 0, "")));
    assertThrows(IllegalStateException.class, () -> rp.createTableSegment(new CreateTableSegment(0, "", false, 0, "", 0)));
    assertThrows(IllegalStateException.class, () -> rp.deleteTableSegment(new DeleteTableSegment(0, "", false, "")));
    assertThrows(IllegalStateException.class, () -> rp.updateTableEntries(new UpdateTableEntries(0, "", "", null, 0)));
    assertThrows(IllegalStateException.class, () -> rp.removeTableKeys(new RemoveTableKeys(0, "", "", null, 0)));
    assertThrows(IllegalStateException.class, () -> rp.readTable(new ReadTable(0, "", "", null)));
    assertThrows(IllegalStateException.class, () -> rp.readTableKeys(new ReadTableKeys(0, "", "", 0, null)));
    assertThrows(IllegalStateException.class, () -> rp.readTableEntries(new ReadTableEntries(0, "", "", 0, null)));
    assertThrows(IllegalStateException.class, () -> rp.mergeSegments(new MergeSegments(0, "", "", "")));
    assertThrows(IllegalStateException.class, () -> rp.sealSegment(new SealSegment(0, "", "")));
    assertThrows(IllegalStateException.class, () -> rp.truncateSegment(new TruncateSegment(0, "", 0, "")));
    assertThrows(IllegalStateException.class, () -> rp.deleteSegment(new DeleteSegment(0, "", "")));
    assertThrows(IllegalStateException.class, () -> rp.readTableEntries(new ReadTableEntries(0, "", "", 0, null)));
    assertThrows(IllegalStateException.class, () -> rp.createTableSegment(new CreateTableSegment(0, "", false, 0, "", 0)));
    assertThrows(IllegalStateException.class, () -> rp.readTableEntriesDelta(new ReadTableEntriesDelta(0, "", "", 0, 0)));
    assertThrows(IllegalStateException.class, () -> rp.createTransientSegment(new CreateTransientSegment(0, new UUID(0, 0), "", "")));
    assertThrows(IllegalStateException.class, () -> rp.connectionDropped());
}