92efa3c916
Motivation: Uptime example is lack of server. UptimeClient's code style is a little bit different from others, which make reader feel confused. We don't need to create a new Bootstrap instance each time client reconnect to server. Modification: Add UptimeServer and UptimeServerHandler which simply accept all connection and discard all message. Change UptimeClient's code style. Share a single Bootstrap instance. Result: Uptime server support. Consistent code style. Single Bootstrap for all reconnection.
68 lines
2.5 KiB
Java
68 lines
2.5 KiB
Java
/*
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* Copyright 2017 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.example.uptime;
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import io.netty.bootstrap.ServerBootstrap;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelInitializer;
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import io.netty.channel.EventLoopGroup;
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import io.netty.channel.nio.NioEventLoopGroup;
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import io.netty.channel.socket.SocketChannel;
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import io.netty.channel.socket.nio.NioServerSocketChannel;
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import io.netty.handler.logging.LogLevel;
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import io.netty.handler.logging.LoggingHandler;
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/**
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* Uptime server is served as a connection server.
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* So it simply discards all message received.
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*/
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public final class UptimeServer {
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private static final int PORT = Integer.parseInt(System.getProperty("port", "8080"));
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private static final UptimeServerHandler handler = new UptimeServerHandler();
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private UptimeServer() {
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}
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public static void main(String[] args) throws Exception {
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EventLoopGroup bossGroup = new NioEventLoopGroup(1);
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EventLoopGroup workerGroup = new NioEventLoopGroup();
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try {
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ServerBootstrap b = new ServerBootstrap();
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b.group(bossGroup, workerGroup)
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.channel(NioServerSocketChannel.class)
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.handler(new LoggingHandler(LogLevel.INFO))
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.childHandler(new ChannelInitializer<SocketChannel>() {
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@Override
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public void initChannel(SocketChannel ch) {
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ch.pipeline().addLast(handler);
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}
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});
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// Bind and start to accept incoming connections.
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ChannelFuture f = b.bind(PORT).sync();
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// Wait until the server socket is closed.
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// In this example, this does not happen, but you can do that to gracefully
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// shut down your server.
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f.channel().closeFuture().sync();
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} finally {
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workerGroup.shutdownGracefully();
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bossGroup.shutdownGracefully();
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}
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}
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}
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