feat(新增): 🚀 关闭客户端

netty/service/src/main/java/cn/bunny/service/netty/demo3/CloseFutureClient.java

@@ -0,0 +1,70 @@
+package cn.bunny.service.netty.demo3;
+
+import io.netty.bootstrap.Bootstrap;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelFutureListener;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.nio.NioSocketChannel;
+import io.netty.handler.codec.string.StringEncoder;
+import io.netty.handler.logging.LogLevel;
+import io.netty.handler.logging.LoggingHandler;
+import lombok.extern.slf4j.Slf4j;
+
+import java.net.InetSocketAddress;
+import java.util.Scanner;
+
+@Slf4j
+public class CloseFutureClient {
+    public static void main(String[] args) throws InterruptedException {
+        NioEventLoopGroup group = new NioEventLoopGroup();
+        ChannelFuture channelFuture = new Bootstrap()
+                .group(group)
+                .channel(NioSocketChannel.class)
+                .handler(new ChannelInitializer<NioSocketChannel>() {
+                    @Override
+                    protected void initChannel(NioSocketChannel nioSocketChannel) throws Exception {
+                        nioSocketChannel.pipeline().addLast(new LoggingHandler(LogLevel.DEBUG));
+                        nioSocketChannel.pipeline().addLast(new StringEncoder());
+                    }
+                })
+                .connect(new InetSocketAddress("localhost", 8080));
+
+        Channel channel = channelFuture.sync().channel();
+        new Thread(() -> {
+            Scanner scanner = new Scanner(System.in);
+            while (true) {
+                String line = scanner.nextLine();
+                if ("q".equals(line)) {
+                    channel.close();// 1秒之后关闭（异步）不一定是这个先关闭
+                    break;
+                }
+                channel.writeAndFlush(line);
+            }
+        }, "input").start();
+
+        // 获取CloseFuture 1、同步处理关闭 2、一步处理关闭
+        ChannelFuture closeFuture = channel.closeFuture();
+        // 同步关闭
+        /**
+         * * 同步方式关闭，目前关闭控制台并没有关闭
+         *   log.debug("等待关闭。。。");
+         *   closeFuture.sync();
+         *   log.debug("处理完成关闭");
+         *   group.shutdownGracefully();
+         */
+
+        /**
+         * * 异步方式关闭
+         */
+        closeFuture.addListener(new ChannelFutureListener() {
+            @Override
+            public void operationComplete(ChannelFuture channelFuture) throws Exception {
+                // 不是立刻停止，等待消息发送完成后在关闭
+                group.shutdownGracefully();
+                log.debug("处理完成关闭");
+            }
+        });
+    }
+}