@Override public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { try { ByteBuf buf = (ByteBuf) msg; MessageType msgType = MessageSerializer.deserializeHeader(buf); if (msgType == MessageType.REQUEST_RESULT) { long requestId = MessageSerializer.getRequestId(buf); RESP result = serializer.deserializeResponse(buf); callback.onRequestResult(requestId, result); } else if (msgType == MessageType.REQUEST_FAILURE) { RequestFailure failure = MessageSerializer.deserializeRequestFailure(buf); callback.onRequestFailure(failure.getRequestId(), failure.getCause()); } else if (msgType == MessageType.SERVER_FAILURE) { throw MessageSerializer.deserializeServerFailure(buf); } else { throw new IllegalStateException("Unexpected response type '" + msgType + "'"); } } catch (Throwable t1) { try { callback.onFailure(t1); } catch (Throwable t2) { LOG.error("Failed to notify callback about failure", t2); } } finally { ReferenceCountUtil.release(msg); } }
/** * 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()); }
/** * Tests that the channel is closed if an Exception reaches the channel handler. */ @Test public void testCloseChannelOnExceptionCaught() throws Exception { KvStateRegistry registry = new KvStateRegistry(); AtomicKvStateRequestStats stats = new AtomicKvStateRequestStats(); MessageSerializer<KvStateInternalRequest, KvStateResponse> serializer = new MessageSerializer<>(new KvStateInternalRequest.KvStateInternalRequestDeserializer(), new KvStateResponse.KvStateResponseDeserializer()); KvStateServerHandler handler = new KvStateServerHandler(testServer, registry, serializer, stats); EmbeddedChannel channel = new EmbeddedChannel(handler); channel.pipeline().fireExceptionCaught(new RuntimeException("Expected test Exception")); ByteBuf buf = (ByteBuf) readInboundBlocking(channel); buf.skipBytes(4); // skip frame length // Verify the response assertEquals(MessageType.SERVER_FAILURE, MessageSerializer.deserializeHeader(buf)); Throwable response = MessageSerializer.deserializeServerFailure(buf); assertTrue(response.getMessage().contains("Expected test Exception")); channel.closeFuture().await(READ_TIMEOUT_MILLIS); assertFalse(channel.isActive()); }
Throwable response = MessageSerializer.deserializeServerFailure(buf); response = MessageSerializer.deserializeServerFailure(buf);
@Override public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { try { ByteBuf buf = (ByteBuf) msg; MessageType msgType = MessageSerializer.deserializeHeader(buf); if (msgType == MessageType.REQUEST_RESULT) { long requestId = MessageSerializer.getRequestId(buf); RESP result = serializer.deserializeResponse(buf); callback.onRequestResult(requestId, result); } else if (msgType == MessageType.REQUEST_FAILURE) { RequestFailure failure = MessageSerializer.deserializeRequestFailure(buf); callback.onRequestFailure(failure.getRequestId(), failure.getCause()); } else if (msgType == MessageType.SERVER_FAILURE) { throw MessageSerializer.deserializeServerFailure(buf); } else { throw new IllegalStateException("Unexpected response type '" + msgType + "'"); } } catch (Throwable t1) { try { callback.onFailure(t1); } catch (Throwable t2) { LOG.error("Failed to notify callback about failure", t2); } } finally { ReferenceCountUtil.release(msg); } }
@Override public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { try { ByteBuf buf = (ByteBuf) msg; MessageType msgType = MessageSerializer.deserializeHeader(buf); if (msgType == MessageType.REQUEST_RESULT) { long requestId = MessageSerializer.getRequestId(buf); RESP result = serializer.deserializeResponse(buf); callback.onRequestResult(requestId, result); } else if (msgType == MessageType.REQUEST_FAILURE) { RequestFailure failure = MessageSerializer.deserializeRequestFailure(buf); callback.onRequestFailure(failure.getRequestId(), failure.getCause()); } else if (msgType == MessageType.SERVER_FAILURE) { throw MessageSerializer.deserializeServerFailure(buf); } else { throw new IllegalStateException("Unexpected response type '" + msgType + "'"); } } catch (Throwable t1) { try { callback.onFailure(t1); } catch (Throwable t2) { LOG.error("Failed to notify callback about failure", t2); } } finally { ReferenceCountUtil.release(msg); } }