| /* |
| * Copyright 2017 HugeGraph Authors |
| * |
| * 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 com.baidu.hugegraph.computer.core.network.message; |
| |
| import com.baidu.hugegraph.computer.core.network.buffer.ManagedBuffer; |
| import com.baidu.hugegraph.computer.core.network.buffer.NettyManagedBuffer; |
| import com.baidu.hugegraph.util.E; |
| |
| import io.netty.buffer.ByteBuf; |
| |
| public class DataMessage extends AbstractMessage implements RequestMessage { |
| |
| private final MessageType type; |
| |
| public DataMessage(MessageType type, int requestId, |
| int partition, ManagedBuffer data) { |
| super(requestId, partition, data); |
| E.checkArgument(requestId > 0, |
| "The data requestId must be > 0, but got %s", |
| requestId); |
| this.type = type; |
| } |
| |
| @Override |
| public MessageType type() { |
| return this.type; |
| } |
| |
| /** |
| * Decoding uses the given ByteBuf as our data, and will zero-copy it. |
| */ |
| public static DataMessage parseFrom(MessageType type, ByteBuf buf) { |
| int requestId = buf.readInt(); |
| int partition = buf.readInt(); |
| |
| int bodyLength = buf.readInt(); |
| // Slice body and retain it, the readIndex of buf will auto to body end |
| ByteBuf bodySlice = buf.readRetainedSlice(bodyLength); |
| ManagedBuffer managedBuffer = new NettyManagedBuffer(bodySlice); |
| return new DataMessage(type, requestId, partition, managedBuffer); |
| } |
| } |