| /* |
| * 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.netty; |
| |
| import java.net.InetSocketAddress; |
| import java.nio.ByteBuffer; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| import java.util.function.Function; |
| |
| import com.baidu.hugegraph.computer.core.common.exception.TransportException; |
| import com.baidu.hugegraph.computer.core.network.ClientHandler; |
| import com.baidu.hugegraph.computer.core.network.ConnectionId; |
| import com.baidu.hugegraph.computer.core.network.TransportClient; |
| import com.baidu.hugegraph.computer.core.network.TransportConf; |
| import com.baidu.hugegraph.computer.core.network.TransportState; |
| import com.baidu.hugegraph.computer.core.network.message.Message; |
| import com.baidu.hugegraph.computer.core.network.message.MessageType; |
| import com.baidu.hugegraph.computer.core.network.session.ClientSession; |
| import com.baidu.hugegraph.util.E; |
| |
| import io.netty.channel.Channel; |
| import io.netty.channel.ChannelFuture; |
| import io.netty.channel.ChannelFutureListener; |
| |
| public class NettyTransportClient implements TransportClient { |
| |
| private final Channel channel; |
| private final ConnectionId connectionId; |
| private final NettyClientFactory clientFactory; |
| private final ClientHandler handler; |
| private final ClientSession session; |
| private final long timeoutSyncRequest; |
| private final long timeoutFinishSession; |
| private boolean preSendAvailable; |
| |
| protected NettyTransportClient(Channel channel, ConnectionId connectionId, |
| NettyClientFactory clientFactory, |
| ClientHandler clientHandler) { |
| E.checkArgumentNotNull(clientHandler, |
| "The clientHandler parameter can't be null"); |
| this.initChannel(channel, connectionId, clientFactory.protocol(), |
| clientHandler); |
| this.channel = channel; |
| this.connectionId = connectionId; |
| this.clientFactory = clientFactory; |
| this.handler = clientHandler; |
| |
| TransportConf conf = this.clientFactory.conf(); |
| this.timeoutSyncRequest = conf.timeoutSyncRequest(); |
| this.timeoutFinishSession = conf.timeoutFinishSession(); |
| this.session = new ClientSession(conf, this.createSendFunction()); |
| this.preSendAvailable = false; |
| } |
| |
| public Channel channel() { |
| return this.channel; |
| } |
| |
| @Override |
| public ConnectionId connectionId() { |
| return this.connectionId; |
| } |
| |
| @Override |
| public InetSocketAddress remoteAddress() { |
| return (InetSocketAddress) this.channel.remoteAddress(); |
| } |
| |
| @Override |
| public boolean active() { |
| return this.channel.isActive(); |
| } |
| |
| @Override |
| public boolean sessionActive() { |
| if (!this.active()) { |
| return false; |
| } |
| TransportState state = this.session.state(); |
| return state == TransportState.ESTABLISHED || |
| state == TransportState.FINISH_SENT; |
| } |
| |
| protected ClientSession clientSession() { |
| return this.session; |
| } |
| |
| public ClientHandler clientHandler() { |
| return this.handler; |
| } |
| |
| private void initChannel(Channel channel, ConnectionId connectionId, |
| NettyProtocol protocol, ClientHandler handler) { |
| protocol.replaceClientHandler(channel, this); |
| // Client stateReady notice |
| handler.onChannelActive(connectionId); |
| } |
| |
| private Function<Message, Future<Void>> createSendFunction() { |
| ChannelFutureListener listener = new ClientChannelListenerOnWrite(); |
| return message -> { |
| ChannelFuture channelFuture = this.channel.writeAndFlush(message); |
| return channelFuture.addListener(listener); |
| }; |
| } |
| |
| @Override |
| public CompletableFuture<Void> startSessionAsync() { |
| return this.session.startAsync(); |
| } |
| |
| @Override |
| public void startSession() throws TransportException { |
| this.startSession(this.timeoutSyncRequest); |
| } |
| |
| private void startSession(long timeout) throws TransportException { |
| this.session.start(timeout); |
| } |
| |
| @Override |
| public boolean send(MessageType messageType, int partition, |
| ByteBuffer buffer) throws TransportException { |
| if (!this.checkSendAvailable()) { |
| return false; |
| } |
| this.session.sendAsync(messageType, partition, buffer); |
| return true; |
| } |
| |
| @Override |
| public CompletableFuture<Void> finishSessionAsync() { |
| return this.session.finishAsync(); |
| } |
| |
| @Override |
| public void finishSession() throws TransportException { |
| this.finishSession(this.timeoutFinishSession); |
| } |
| |
| private void finishSession(long timeout) throws TransportException { |
| this.session.finish(timeout); |
| } |
| |
| protected boolean checkSendAvailable() { |
| return !this.session.flowBlocking() && this.channel.isWritable(); |
| } |
| |
| protected void checkAndNotifySendAvailable() { |
| boolean sendAvailable = this.checkSendAvailable(); |
| if (sendAvailable && !this.preSendAvailable) { |
| this.handler.sendAvailable(this.connectionId); |
| } |
| this.preSendAvailable = sendAvailable; |
| } |
| |
| @Override |
| public void close() { |
| if (this.channel != null) { |
| long timeout = this.clientFactory.conf().closeTimeout(); |
| this.channel.close().awaitUninterruptibly(timeout, |
| TimeUnit.MILLISECONDS); |
| } |
| } |
| |
| private class ClientChannelListenerOnWrite |
| extends ChannelFutureListenerOnWrite { |
| |
| ClientChannelListenerOnWrite() { |
| super(NettyTransportClient.this.handler); |
| } |
| |
| @Override |
| public void onSuccess(Channel channel, ChannelFuture future) { |
| super.onSuccess(channel, future); |
| NettyTransportClient.this.checkAndNotifySendAvailable(); |
| } |
| } |
| } |