Java NIO -- no-block server & client

Server:

package com.colorcc.sample.nio;import java.io.IOException;import java.net.InetSocketAddress;import java.nio.ByteBuffer;import java.nio.CharBuffer;import java.nio.channels.SelectionKey;import java.nio.channels.Selector;import java.nio.channels.ServerSocketChannel;import java.nio.channels.SocketChannel;import java.nio.charset.Charset;import java.util.Iterator;import java.util.Set;public class NoneBlockServer {public static void main(String[] args) throws IOException {try (Selector selector = Selector.open()) {ServerSocketChannel serverChannel = ServerSocketChannel.open();serverChannel.configureBlocking(false);serverChannel.bind(new InetSocketAddress("127.0.0.1", 8096), 50);serverChannel.register(selector, SelectionKey.OP_ACCEPT);while (true) {selector.select();Set<SelectionKey> selectedKeys = selector.selectedKeys();Iterator<SelectionKey> iterator = selectedKeys.iterator();while (iterator.hasNext()) {SelectionKey key = iterator.next();iterator.remove();if (key.isAcceptable()) {ServerSocketChannel server = (ServerSocketChannel)key.channel();SocketChannel channel = server.accept();channel.configureBlocking(false);System.out.println("Accept new client request: " + channel.socket().getRemoteSocketAddress().toString());channel.register(selector, SelectionKey.OP_READ);  // 监听服务器读数据请求} else if (key.isReadable()) {System.out.println("Read  request data and do biz process.");SocketChannel channel = (SocketChannel)key.channel();String remote = channel.getRemoteAddress().toString();StringBuffer content = new StringBuffer();content.append("accept[" + remote + "]: ");ByteBuffer buffer = ByteBuffer.allocate(8096);while (true) {buffer.clear();int read = channel.read(buffer);if (read > 0) {buffer.flip(); // 设置 buffer 为读数据模式CharBuffer cb = Charset.forName("UTF-8").decode(buffer);content.append(cb.toString());} else {break;}}System.out.println(content.toString());System.out.println("do biz ...");channel.register(selector, SelectionKey.OP_WRITE);  // 监听服务器端写数据请求} else if (key.isWritable()) {System.out.println("Send response to request.");SocketChannel channel = (SocketChannel)key.channel();channel.write(ByteBuffer.wrap("no block server response".getBytes()));channel.register(selector, SelectionKey.OP_READ);  // 监听服务器端读数据请求}}}}}}

Client:

package com.colorcc.sample.nio;import java.io.IOException;import java.net.InetSocketAddress;import java.nio.ByteBuffer;import java.nio.CharBuffer;import java.nio.channels.SocketChannel;import java.nio.charset.Charset;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;public class NoneBlockClient {public static void main(String[] args) throws IOException {ExecutorService executor = Executors.newFixedThreadPool(3);for (int i = 0; i < 1; i++) {executor.submit(new Runnable() {@Overridepublic void run() {try {request();} catch (IOException e) {e.printStackTrace();}}});}}private static void request() throws IOException {SocketChannel socketChannel = SocketChannel.open();socketChannel.configureBlocking(false);socketChannel.connect(new InetSocketAddress("127.0.0.1", 8096));if (socketChannel.finishConnect()) {StringBuffer sb = new StringBuffer();for (int i = 0; i < 10000; i++) {sb.append("a" + i + ",");}socketChannel.write(ByteBuffer.wrap(sb.toString().getBytes()));try {Thread.sleep(1000);  // 为了给服务器执行biz并返回response} catch (InterruptedException e) {e.printStackTrace();}ByteBuffer buffer = ByteBuffer.allocate(100);socketChannel.socket().getChannel().read(buffer);buffer.flip(); // 设置 buffer 为读数据模式CharBuffer decode = Charset.forName("UTF-8").decode(buffer);System.out.println("Get response from: " + decode.toString());// socketChannel.socket().close();}// socketChannel.close();}}

运行结果：

Server:

Accept new client request: /127.0.0.1:35006Read  request data and do biz process.accept[/127.0.0.1:35006]: a0,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,...,a9999,do biz ...Send response to request.

Client:

Get response from: no block server response

TCP/IP包:

 遗留问题：

无关闭操作，处理关闭 action.