使用nio实现多线程监听读写事件

实现多线程时读写事件互不影响,直接上代码

1.Server端代码

@Slf4j
public class ServerSocket {

    private static final Worker[] worker = new Worker[Runtime.getRuntime().availableProcessors()];

    static {
        for (int i = 0; i < worker.length; i++) {
            worker[i] = new Worker("worker" + i);
        }
    }


    public static void main(String[] args) throws IOException {
        Thread.currentThread().setName("boss");
        ServerSocketChannel ssc = ServerSocketChannel.open();
        ssc.bind(new InetSocketAddress("localhost", 1221));
        ssc.configureBlocking(false); //开启非阻塞模式
        Selector selector = Selector.open();
        ssc.register(selector, SelectionKey.OP_ACCEPT);
        AtomicInteger atomicInteger = new AtomicInteger();
        while (true) {
            selector.select();
            Iterator<SelectionKey> iterator = selector.selectedKeys().iterator();
            while (iterator.hasNext()) {
                SelectionKey key = iterator.next();
                iterator.remove();
                if (key.isAcceptable()) {
                    ServerSocketChannel channel = (ServerSocketChannel) key.channel();
                    SocketChannel sc = channel.accept();
                    log.debug("客户端链接:{}", sc);
                    sc.configureBlocking(false);
                    worker[atomicInteger.getAndIncrement() % worker.length].register(sc);
                    System.out.println("=atomicInteger=======================" + atomicInteger.getAndIncrement());
                    log.debug("before register----------------------------------");

                    log.debug("after register----------------------------------");
                    log.debug("");
                }
            }
        }
    }

    static class Worker implements Runnable {
        private Thread thread;
        private Selector selector;
        private String name;
        private volatile boolean isStart = false;
        private ConcurrentLinkedQueue<Runnable> queue = new ConcurrentLinkedQueue();

        public Worker(String name) {
             = name;
        }

        public void register(SocketChannel sc) throws IOException {
            if (!isStart) {
                log.debug("注册事件  work-----------------------------");
                selector = Selector.open();
                thread = new Thread(this);
                thread.setName(name);
                thread.start();
                isStart = true;
            }

            queue.add(() -> {
                try {
                    sc.register(selector, SelectionKey.OP_READ);
                } catch (ClosedChannelException e) {
                    throw new RuntimeException(e);
                }
            });
            selector.wakeup();
        }

        @Override
        public void run() {
            while (true) {
                try {
                    log.debug("select  work-----------------------------");
                    selector.select();
                    Runnable poll = queue.poll();
                    if (null != poll) {
                        poll.run();
                    }

                    Iterator<SelectionKey> iterator = selector.selectedKeys().iterator();
                    while (iterator.hasNext()) {
                        SelectionKey key = iterator.next();
                        iterator.remove();
                        if (key.isReadable()) {
                            SocketChannel sc = (SocketChannel) key.channel();
                            ByteBuffer byteBuffer = ByteBuffer.allocateDirect(16);
                            try {
                                int read = sc.read(byteBuffer);
                                if (read == -1) {
                                    key.cancel();
                                    sc.close();
                                }
                                byteBuffer.flip();
                                log.info("发送的消息:{}", Charset.defaultCharset().decode(byteBuffer));
                            } catch (Exception e) {
                                e.printStackTrace();
                                key.cancel();
                                sc.close();
                            }
                        }
                        log.debug("=====================");
                    }
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        }
    }
}

2 客户端代码

public class Cilent {
    public static void main(String[] args) throws IOException {
        SocketChannel socketChannel = SocketChannel.open();
        socketChannel.connect(new InetSocketAddress("127.0.0.1",1221));
        socketChannel.write(Charset.defaultCharset().encode("1234567890"));
        System.in.read();

    }

}