zookeeper分布式(五)--nio(四)

最新推荐文章于 2021-11-07 23:03:45 发布

scaling_heights

最新推荐文章于 2021-11-07 23:03:45 发布

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分类专栏： zookeeper nio

本文链接：https://blog.youkuaiyun.com/jz1993/article/details/109152182

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本文深入探讨了Zookeeper在分布式环境中的应用，并重点讲解了NIO（非阻塞I/O）技术如何在Zookeeper中发挥关键作用，帮助实现高效的数据通信。

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nio

package com.test.netty.nio;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.util.Iterator;
import java.util.Set;

/**
 * https://blog.youkuaiyun.com/chenssy/article/details/78703515
 */
public class NIOClient {
    private SocketChannel socketChannel;
    ByteBuffer readBuffer = ByteBuffer.allocate(1024);
    ByteBuffer writeBuffer = ByteBuffer.allocate(1024);
    private Selector selector;

    public NIOClient(String hostname, int port){
        try {
            socketChannel = SocketChannel.open();
            // 设置为非阻塞 否则无法注册
            socketChannel.configureBlocking(false);
            selector = Selector.open();
            socketChannel.register(selector, SelectionKey.OP_CONNECT);
            // 一定要先注册在连接
            socketChannel.connect(new InetSocketAddress(hostname, port));
            System.out.printf("client init success,connect port:%s\r\n", port);
            listen();
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try {
                socketChannel.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public void sendMsg(){
        try {
            socketChannel.register(selector, SelectionKey.OP_WRITE);
        } catch (ClosedChannelEx

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