Reactor 模式

kafka Reactor 模式？

netty Reactor 模式？

tomcat Reactor 模式？

jetty Reactor 模式？

https://docs.oracle.com/javase/8/docs/technotes/guides/io/enhancements.html

BIO 问题

线程消耗 1+N

NIO 问题

Is ServerSocketChannel block ?

Is (client) SocketChannel block ?

What Selector

BIO (before 1.5)

bio 通常指 one client one thread 模式

ServerSocket ss = new ServerSocket();
SocketAddress sa = new InetSocketAddress(9886);
ss.bind(sa, 100);
while (!Thread.interrupted()) {
    Socket sk = ss.accept();
    // 可以使用线程池处理
    new Thread(() -> {
        handle(sk);
    }).start();
}

NIO(1.4-1.5, JSR 51)

https://en.wikipedia.org/wiki/Non-blocking_I/O_(Java)

https://docs.oracle.com/javase/1.5.0/docs/guide/nio/index.html

Scalable IO in Java by Doug Lea.pdf