NioServerSocketChannel

NioServerSocketChannel

io.netty.channel.socket.nio.NioServerSocketChannel

继承图

NioServerSocketChannel 方法

构造函数

public NioServerSocketChannel() {
   this(newSocket(DEFAULT_SELECTOR_PROVIDER));
}

newSocket

打开ServerSocketChannel

private static ServerSocketChannel newSocket(SelectorProvider provider) {
        try {
            /**
             *  Use the {@link SelectorProvider} to open {@link SocketChannel} and so remove condition in
             *  {@link SelectorProvider#provider()} which is called by each ServerSocketChannel.open() otherwise.
             *
             *  See <a href="https://github.com/netty/netty/issues/2308">#2308</a>.
             */
            return provider.openServerSocketChannel();
        } catch (IOException e) {
            throw new ChannelException(
                    "Failed to open a server socket.", e);
        }
    }

javaChannel

private final SelectableChannel ch;
protected SelectableChannel javaChannel() {
    return ch;
}
protected ServerSocketChannel javaChannel() {
    return (ServerSocketChannel) super.javaChannel();
}

bind

protected void doBind(SocketAddress localAddress) throws Exception {
        if (PlatformDependent.javaVersion() >= 7) {
            javaChannel().bind(localAddress, config.getBacklog());
        } else {
            javaChannel().socket().bind(localAddress, config.getBacklog());
        }
    }

doClose()

protected void doClose() throws Exception {
        javaChannel().close();
    }

doReadMessages

protected int doReadMessages(List<Object> buf) throws Exception {
        SocketChannel ch = SocketUtils.accept(javaChannel());

        try {
            if (ch != null) {
                buf.add(new NioSocketChannel(this, ch));
                return 1;
            }
        } catch (Throwable t) {
            logger.warn("Failed to create a new channel from an accepted socket.", t);

            try {
                ch.close();
            } catch (Throwable t2) {
                logger.warn("Failed to close a socket.", t2);
            }
        }

        return 0;
    }