org.apache.flink.shaded.netty4.io.netty.buffer.ByteBuf类的使用及代码示例

x33g5p2x  于2022-01-17 转载在 其他  
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本文整理了Java中org.apache.flink.shaded.netty4.io.netty.buffer.ByteBuf类的一些代码示例，展示了ByteBuf类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ByteBuf类的具体详情如下：
包路径：org.apache.flink.shaded.netty4.io.netty.buffer.ByteBuf
类名称：ByteBuf

ByteBuf介绍

暂无

代码示例

代码示例来源：origin: apache/flink

@Override
  public KvStateInternalRequest deserializeMessage(ByteBuf buf) {
    KvStateID kvStateId = new KvStateID(buf.readLong(), buf.readLong());
    int length = buf.readInt();
    Preconditions.checkArgument(length >= 0,
        "Negative length for key and namespace. " +
            "This indicates a serialization error.");
    byte[] serializedKeyAndNamespace = new byte[length];
    if (length > 0) {
      buf.readBytes(serializedKeyAndNamespace);
    }
    return new KvStateInternalRequest(kvStateId, serializedKeyAndNamespace);
  }
}

代码示例来源：origin: apache/flink

/**
 * Serializes the exception containing the failure message sent to the
 * {@link org.apache.flink.queryablestate.network.Client} in case of
 * protocol related errors.
 *
 * @param alloc            The {@link ByteBufAllocator} used to allocate the buffer to serialize the message into.
 * @param requestId        The id of the request to which the message refers to.
 * @param cause            The exception thrown at the server.
 * @return A {@link ByteBuf} containing the serialized message.
 */
public static ByteBuf serializeRequestFailure(
    final ByteBufAllocator alloc,
    final long requestId,
    final Throwable cause) throws IOException {
  final ByteBuf buf = alloc.ioBuffer();
  // Frame length is set at the end
  buf.writeInt(0);
  writeHeader(buf, MessageType.REQUEST_FAILURE);
  buf.writeLong(requestId);
  try (ByteBufOutputStream bbos = new ByteBufOutputStream(buf);
      ObjectOutput out = new ObjectOutputStream(bbos)) {
    out.writeObject(cause);
  }
  // Set frame length
  int frameLength = buf.readableBytes() - Integer.BYTES;
  buf.setInt(0, frameLength);
  return buf;
}

代码示例来源：origin: apache/flink

@Override
public void close() throws Exception {
  if (!isClosed) {
    // If we did not consume the whole buffer yet, we have to release
    // it here. Otherwise, it's the responsibility of the consumer.
    if (!isEndOfInput) {
      buf.release();
    }
    isClosed = true;
  }
}

代码示例来源：origin: apache/flink

private ByteBuf readChunk() {
  if (isClosed) {
    return null;
  } else if (buf.readableBytes() <= chunkSize) {
    isEndOfInput = true;
    // Don't retain as the consumer is responsible to release it
    return buf.slice();
  } else {
    // Return a chunk sized slice of the buffer. The ref count is
    // shared with the original buffer. That's why we need to retain
    // a reference here.
    return buf.readSlice(chunkSize).retain();
  }
}

代码示例来源：origin: apache/flink

@Override
  public KvStateResponse deserializeMessage(ByteBuf buf) {
    int length = buf.readInt();
    Preconditions.checkArgument(length >= 0,
        "Negative length for state content. " +
            "This indicates a serialization error.");
    byte[] content = new byte[length];
    buf.readBytes(content);
    return new KvStateResponse(content);
  }
}

代码示例来源：origin: com.alibaba.blink/flink-table

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
  ByteBuf buf = (ByteBuf) msg;
  byte[] request = new byte[buf.readableBytes()];
  buf.readBytes(request);
  byte call = request[0];
  switch (call) {
    case TableServiceMessage.GET_PARTITIONS:
      getPartitions(ctx, request);
      break;
    case TableServiceMessage.READ:
      read(ctx, request);
      break;
    case TableServiceMessage.WRITE:
      write(ctx, request);
      break;
    case TableServiceMessage.INITIALIZE_PARTITION:
      initializePartition(ctx, request);
      break;
    default:
      LOG.error("Unsupported call: " + call);
  }
}

代码示例来源：origin: com.alibaba.blink/flink-runtime

@Override
ByteBuf write(ByteBufAllocator allocator) throws IOException {
  final ByteBuf result = allocateBuffer(allocator, ID);
  try (ObjectOutputStream oos = new ObjectOutputStream(new ByteBufOutputStream(result))) {
    oos.writeObject(cause);
    if (receiverId != null) {
      result.writeBoolean(true);
      receiverId.writeTo(result);
    } else {
      result.writeBoolean(false);
    }
    // Update frame length...
    result.setInt(0, result.readableBytes());
    return result;
  }
  catch (Throwable t) {
    result.release();
    if (t instanceof IOException) {
      throw (IOException) t;
    } else {
      throw new IOException(t);
    }
  }
}

代码示例来源：origin: org.apache.flink/flink-runtime

static BufferResponse readFrom(ByteBuf buffer) {
    InputChannelID receiverId = InputChannelID.fromByteBuf(buffer);
    int sequenceNumber = buffer.readInt();
    int backlog = buffer.readInt();
    boolean isBuffer = buffer.readBoolean();
    int size = buffer.readInt();
    ByteBuf retainedSlice = buffer.readSlice(size).retain();
    return new BufferResponse(retainedSlice, isBuffer, sequenceNumber, receiverId, backlog);
  }
}

代码示例来源：origin: apache/flink

/**
 * Serializes the failure message sent to the
 * {@link org.apache.flink.queryablestate.network.Client} in case of
 * server related errors.
 *
 * @param alloc            The {@link ByteBufAllocator} used to allocate the buffer to serialize the message into.
 * @param cause            The exception thrown at the server.
 * @return        The failure message.
 */
public static ByteBuf serializeServerFailure(
    final ByteBufAllocator alloc,
    final Throwable cause) throws IOException {
  final ByteBuf buf = alloc.ioBuffer();
  // Frame length is set at end
  buf.writeInt(0);
  writeHeader(buf, MessageType.SERVER_FAILURE);
  try (ByteBufOutputStream bbos = new ByteBufOutputStream(buf);
      ObjectOutput out = new ObjectOutputStream(bbos)) {
    out.writeObject(cause);
  }
  // Set frame length
  int frameLength = buf.readableBytes() - Integer.BYTES;
  buf.setInt(0, frameLength);
  return buf;
}

代码示例来源：origin: apache/flink

/**
 * Tests server failure serialization.
 */
@Test
public void testServerFailureSerialization() throws Exception {
  IllegalStateException cause = new IllegalStateException("Expected test");
  ByteBuf buf = MessageSerializer.serializeServerFailure(alloc, cause);
  int frameLength = buf.readInt();
  assertEquals(MessageType.SERVER_FAILURE, MessageSerializer.deserializeHeader(buf));
  Throwable request = MessageSerializer.deserializeServerFailure(buf);
  assertEquals(buf.readerIndex(), frameLength + 4);
  assertEquals(cause.getClass(), request.getClass());
  assertEquals(cause.getMessage(), request.getMessage());
}

代码示例来源：origin: org.apache.flink/flink-runtime_2.11

@Override
ByteBuf write(ByteBufAllocator allocator) throws IOException {
  ByteBuf result = null;
  try {
    result = allocateBuffer(allocator, ID, 16 + 16 + 4 + 16 + 4);
    partitionId.getPartitionId().writeTo(result);
    partitionId.getProducerId().writeTo(result);
    result.writeInt(queueIndex);
    receiverId.writeTo(result);
    result.writeInt(credit);
    return result;
  }
  catch (Throwable t) {
    if (result != null) {
      result.release();
    }
    throw new IOException(t);
  }
}

代码示例来源：origin: apache/flink

private void sendError(ChannelHandlerContext ctx, String error) {
    if (ctx.channel().isActive()) {
      DefaultFullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,
        HttpResponseStatus.INTERNAL_SERVER_ERROR,
        Unpooled.wrappedBuffer(error.getBytes(ConfigConstants.DEFAULT_CHARSET)));

      response.headers().set(HttpHeaders.Names.CONTENT_TYPE, "text/plain");
      response.headers().set(HttpHeaders.Names.CONTENT_LENGTH, response.content().readableBytes());

      ctx.writeAndFlush(response);
    }
  }
}

代码示例来源：origin: com.alibaba.blink/flink-runtime

static TaskEventRequest readFrom(ByteBuf buffer, ClassLoader classLoader) throws IOException {
    // directly deserialize fromNetty's buffer
    int length = buffer.readInt();
    ByteBuffer serializedEvent = buffer.nioBuffer(buffer.readerIndex(), length);
    // assume this event's content is read from the ByteBuf (positions are not shared!)
    buffer.readerIndex(buffer.readerIndex() + length);
    TaskEvent event =
      (TaskEvent) EventSerializer.fromSerializedEvent(serializedEvent, classLoader);
    ResultPartitionID partitionId =
      new ResultPartitionID(
        IntermediateResultPartitionID.fromByteBuf(buffer),
        ExecutionAttemptID.fromByteBuf(buffer));
    InputChannelID receiverId = InputChannelID.fromByteBuf(buffer);
    return new TaskEventRequest(event, partitionId, receiverId);
  }
}

代码示例来源：origin: apache/flink

/**
 * Helper for serializing the messages.
 *
 * @param alloc            The {@link ByteBufAllocator} used to allocate the buffer to serialize the message into.
 * @param requestId        The id of the request to which the message refers to.
 * @param messageType    The {@link MessageType type of the message}.
 * @param payload        The serialized version of the message.
 * @return A {@link ByteBuf} containing the serialized message.
 */
private static ByteBuf writePayload(
    final ByteBufAllocator alloc,
    final long requestId,
    final MessageType messageType,
    final byte[] payload) {
  final int frameLength = HEADER_LENGTH + REQUEST_ID_SIZE + payload.length;
  final ByteBuf buf = alloc.ioBuffer(frameLength + Integer.BYTES);
  buf.writeInt(frameLength);
  writeHeader(buf, messageType);
  buf.writeLong(requestId);
  buf.writeBytes(payload);
  return buf;
}

代码示例来源：origin: apache/flink

/**
 * De-serializes the header and returns the {@link MessageType}.
 * <pre>
 *  <b>The buffer is expected to be at the request id position.</b>
 * </pre>
 * @param buf    The {@link ByteBuf} containing the serialized request id.
 * @return        The request id.
 */
public static long getRequestId(final ByteBuf buf) {
  return buf.readLong();
}

代码示例来源：origin: com.alibaba.blink/flink-runtime

private boolean readOrDiscardBufferResponse(ByteBuf data) {
  checkState(currentNettyMessage != null && currentNettyMessage instanceof NettyMessage.BufferResponse);
  NettyMessage.BufferResponse bufferResponse = (NettyMessage.BufferResponse) currentNettyMessage;
  // If current buffer is empty, then no more data to receive
  if (bufferResponse.dataBufferSize == 0) {
    return true;
  }
  ByteBuf dataBuffer = bufferResponse.getBuffer();
  if (remainingBufferSize < 0) {
    remainingBufferSize = bufferResponse.dataBufferSize;
  }
  if (dataBuffer != null) {
    remainingBufferSize -= copyToTargetBuffer(data, dataBuffer, remainingBufferSize);
  } else {
    int actualBytesToDiscard = Math.min(data.readableBytes(), remainingBufferSize);
    data.readerIndex(data.readerIndex() + actualBytesToDiscard);
    remainingBufferSize -= actualBytesToDiscard;
  }
  return remainingBufferSize == 0;
}

代码示例来源：origin: apache/flink

/**
 * De-serializes the header and returns the {@link MessageType}.
 * <pre>
 *  <b>The buffer is expected to be at the header position.</b>
 * </pre>
 * @param buf                        The {@link ByteBuf} containing the serialized header.
 * @return                            The message type.
 * @throws IllegalStateException    If unexpected message version or message type.
 */
public static MessageType deserializeHeader(final ByteBuf buf) {
  // checking the version
  int version = buf.readInt();
  Preconditions.checkState(version == VERSION,
      "Version Mismatch:  Found " + version + ", Expected: " + VERSION + '.');
  // fetching the message type
  int msgType = buf.readInt();
  MessageType[] values = MessageType.values();
  Preconditions.checkState(msgType >= 0 && msgType < values.length,
      "Illegal message type with index " + msgType + '.');
  return values[msgType];
}

代码示例来源：origin: apache/flink

@Override
public long progress() {
  return buf.readerIndex();
}

代码示例来源：origin: apache/flink

/**
 * Helper for serializing the header.
 *
 * @param buf         The {@link ByteBuf} to serialize the header into.
 * @param messageType The {@link MessageType} of the message this header refers to.
 */
private static void writeHeader(final ByteBuf buf, final MessageType messageType) {
  buf.writeInt(VERSION);
  buf.writeInt(messageType.ordinal());
}

代码示例来源：origin: apache/flink

buf.skipBytes(4); // skip frame length
assertEquals("Buffer not recycled", 0, buf.refCnt());
    1222112278,
    new RuntimeException("Expected test Exception"));
buf.skipBytes(4); // skip frame length
assertEquals("Buffer not recycled", 0, buf.refCnt());
    channel.alloc(),
    new RuntimeException("Expected test Exception"));
buf.skipBytes(4); // skip frame length
buf = channel.alloc().buffer(4).writeInt(1223823);
assertEquals("Buffer not recycled", 0, buf.refCnt());

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