Netty 4 多客户端 [英] Netty 4 multiple client

问题描述

我需要让客户端能够建立许多连接.我使用 Netty 4.0.不幸的是，所有现有示例都没有显示如何创建大量连接.

I need to make the client is able to make many connections. I use Netty 4.0. Unfortunately all existing examples do not show how to create a lot of connections.

public class TelnetClient {
    private Bootstrap b;
    public TelnetClient() {
        b = new Bootstrap();
    }
    public void connect(String host, int port) throws Exception {
        try {
            b.group(new NioEventLoopGroup()).channel(NioSocketChannel.class).remoteAddress(host, port).handler(new TelnetClientInitializer());
            Channel ch = b.connect().sync().channel();
            ChannelFuture lastWriteFuture = null;
            BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
            for (;;) {
                String line = in.readLine();
                if (line == null) break;
                lastWriteFuture = ch.write(line + "
");
                if (line.toLowerCase().equals("bye")) {
                    ch.closeFuture().sync();
                    break;
                }
            }
            if (lastWriteFuture != null) lastWriteFuture.sync();
        } finally {
            b.shutdown();
        }
    }
    public static void main(String[] args) throws Exception {
        TelnetClient tc = new TelnetClient();
        tc.connect("127.0.0.1", 1048);
        tc.connect("192.168.1.123", 1050);
    //...
    }
}

这是正确的决定吗?还是会更好?

Is this the correct decision? or could it be better?

推荐答案

是的，它几乎是正确的.你唯一必须改变的是在每次连接时创建 NioEventLoopGroup.

Yes its almost correct.. The only thing you MUST change is the creation of NioEventLoopGroup on every connect.

NioEventLoopGroup 实例很昂贵，因此应该共享它们.创建一个实例并共享它，每次都将相同的实例传递给 Bootstrap.group(...)..

NioEventLoopGroup instances are expensive so they should be shared. Create one instance and share it, by pass the same instance to the Bootstrap.group(...) everytime..

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