How to use

serializeResponse

method

in

org.apache.flink.queryablestate.network.messages.MessageSerializer

final ByteBuf serialResp = MessageSerializer.serializeResponse(ctx.alloc(), requestId, resp);

ByteBuf buf = MessageSerializer.serializeResponse(channel.alloc(), 1222112277L, response);
buf.skipBytes(4); // skip frame length

  @Override
  public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf buf = (ByteBuf) msg;
    assertEquals(MessageType.REQUEST, MessageSerializer.deserializeHeader(buf));
    long requestId = MessageSerializer.getRequestId(buf);
    KvStateInternalRequest request = serializer.deserializeRequest(buf);
    buf.release();
    KvStateResponse response = new KvStateResponse(serializedResult);
    ByteBuf serResponse = MessageSerializer.serializeResponse(
        ctx.alloc(),
        requestId,
        response);
    ctx.channel().writeAndFlush(serResponse);
  }
});

ByteBuf response = MessageSerializer.serializeResponse(
    serverChannel.alloc(),
    requestId,

/**
 * Tests response serialization with zero-length serialized result.
 */
@Test
public void testResponseSerializationWithZeroLengthSerializedResult() throws Exception {
  byte[] serializedResult = new byte[0];
  final KvStateResponse response = new KvStateResponse(serializedResult);
  final MessageSerializer<KvStateInternalRequest, KvStateResponse> serializer =
      new MessageSerializer<>(new KvStateInternalRequest.KvStateInternalRequestDeserializer(), new KvStateResponse.KvStateResponseDeserializer());
  ByteBuf buf = MessageSerializer.serializeResponse(alloc, 72727278L, response);
  int frameLength = buf.readInt();
  assertEquals(MessageType.REQUEST_RESULT, MessageSerializer.deserializeHeader(buf));
  assertEquals(72727278L, MessageSerializer.getRequestId(buf));
  KvStateResponse responseDeser = serializer.deserializeResponse(buf);
  assertEquals(buf.readerIndex(), frameLength + 4);
  assertArrayEquals(serializedResult, responseDeser.getContent());
}

/**
 * Tests response serialization.
 */
@Test
public void testResponseSerialization() throws Exception {
  long requestId = Integer.MAX_VALUE + 72727278L;
  byte[] serializedResult = randomByteArray(1024);
  final KvStateResponse response = new KvStateResponse(serializedResult);
  final MessageSerializer<KvStateInternalRequest, KvStateResponse> serializer =
      new MessageSerializer<>(new KvStateInternalRequest.KvStateInternalRequestDeserializer(), new KvStateResponse.KvStateResponseDeserializer());
  ByteBuf buf = MessageSerializer.serializeResponse(alloc, requestId, response);
  int frameLength = buf.readInt();
  assertEquals(MessageType.REQUEST_RESULT, MessageSerializer.deserializeHeader(buf));
  assertEquals(requestId, MessageSerializer.getRequestId(buf));
  KvStateResponse responseDeser = serializer.deserializeResponse(buf);
  assertEquals(buf.readerIndex(), frameLength + 4);
  assertArrayEquals(serializedResult, responseDeser.getContent());
}

unexpectedMessage = MessageSerializer.serializeResponse(channel.alloc(), 192L, stateResponse);

final ByteBuf serialResp = MessageSerializer.serializeResponse(ctx.alloc(), requestId, resp);

final ByteBuf serialResp = MessageSerializer.serializeResponse(ctx.alloc(), requestId, resp);