BAEL-768 Introduction to Netty (#1933)

* BAEL-748 quick guide to @Value

* BAEL-748 changes from review

* BAEL-748 inject comma-separated values into array

* BAEL-768 Introduction to Netty

* BAEL-768 remove commented code

libraries/src/main/java/com/baeldung/netty/NettyClient.java

@@ -0,0 +1,37 @@
+package com.baeldung.netty;
+
+import io.netty.bootstrap.Bootstrap;
+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.NioSocketChannel;
+
+public class NettyClient {
+    public static void main(String[] args) throws Exception {
+        String host = "localhost";
+        int port = 8080;
+        EventLoopGroup workerGroup = new NioEventLoopGroup();
+
+        try {
+            Bootstrap b = new Bootstrap();
+            b.group(workerGroup);
+            b.channel(NioSocketChannel.class);
+            b.option(ChannelOption.SO_KEEPALIVE, true);
+            b.handler(new ChannelInitializer<SocketChannel>() {
+                @Override
+                public void initChannel(SocketChannel ch) throws Exception {
+                    ch.pipeline().addLast(new RequestDataEncoder(), new ResponseDataDecoder(), new ClientHandler());
+                }
+            });
+
+            ChannelFuture f = b.connect(host, port).sync();
+
+            f.channel().closeFuture().sync();
+        } finally {
+            workerGroup.shutdownGracefully();
+        }
+    }
+}