| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.tinkerpop.gremlin.driver.handler; |
| |
| import io.netty.handler.codec.ReplayingDecoder; |
| import org.apache.tinkerpop.gremlin.driver.MessageSerializer; |
| import io.netty.buffer.ByteBuf; |
| import io.netty.channel.ChannelHandlerContext; |
| import org.apache.tinkerpop.gremlin.driver.simple.WebSocketClient; |
| |
| import java.util.List; |
| |
| /** |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| * @deprecated As of release 3.3.10, not replaced, use {@link WebSocketClient}. |
| */ |
| @Deprecated |
| public final class NioGremlinResponseDecoder extends ReplayingDecoder<NioGremlinResponseDecoder.DecoderState> { |
| private final MessageSerializer serializer; |
| private int messageLength; |
| |
| public NioGremlinResponseDecoder(final MessageSerializer serializer) { |
| super(DecoderState.MESSAGE_LENGTH); |
| this.serializer = serializer; |
| } |
| |
| @Override |
| protected void decode(final ChannelHandlerContext channelHandlerContext, final ByteBuf byteBuf, final List<Object> objects) throws Exception { |
| switch (state()) { |
| case MESSAGE_LENGTH: |
| messageLength = byteBuf.readInt(); |
| checkpoint(DecoderState.MESSAGE); |
| case MESSAGE: |
| final ByteBuf messageFrame = byteBuf.readBytes(messageLength); |
| objects.add(serializer.deserializeResponse(messageFrame)); |
| checkpoint(DecoderState.MESSAGE_LENGTH); |
| break; |
| default: |
| throw new Error("Invalid message received from Gremlin Server"); |
| } |
| } |
| |
| public enum DecoderState { |
| MESSAGE_LENGTH, |
| MESSAGE |
| } |
| } |