Merge branch 'master' into bael-16656

libraries-server/src/main/java/com/baeldung/netty/NettyServer.java

@@ -0,0 +1,49 @@
+package com.baeldung.netty;
+
+import io.netty.bootstrap.ServerBootstrap;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelOption;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioServerSocketChannel;
+
+public class NettyServer {
+
+    private int port;
+
+    private NettyServer(int port) {
+        this.port = port;
+    }
+
+    public static void main(String[] args) throws Exception {
+        int port;
+        if (args.length > 0) {
+            port = Integer.parseInt(args[0]);
+        } else {
+            port = 8080;
+        }
+        new NettyServer(port).run();
+    }
+
+    private void run() throws Exception {
+        EventLoopGroup bossGroup = new NioEventLoopGroup();
+        EventLoopGroup workerGroup = new NioEventLoopGroup();
+        try {
+            ServerBootstrap b = new ServerBootstrap();
+            b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).childHandler(new ChannelInitializer<SocketChannel>() {
+                @Override
+                public void initChannel(SocketChannel ch) throws Exception {
+                    ch.pipeline().addLast(new RequestDecoder(), new ResponseDataEncoder(), new ProcessingHandler());
+                }
+            }).option(ChannelOption.SO_BACKLOG, 128).childOption(ChannelOption.SO_KEEPALIVE, true);
+
+            ChannelFuture f = b.bind(port).sync();
+            f.channel().closeFuture().sync();
+        } finally {
+            workerGroup.shutdownGracefully();
+            bossGroup.shutdownGracefully();
+        }
+    }
+}