Netty 4多个客户端

Question

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.

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 + "\r\n");
                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？

Answer 1

是的它几乎是正确的..你必须改变的唯一事情是在每个连接上创建NioEventLoopGroup.

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