simple server

pom.xml

@@ -15,6 +15,7 @@
         <slf4j.version>1.7.21</slf4j.version>
         <log4j.version>2.5</log4j.version>
         <spring.version>4.2.5.RELEASE</spring.version>
+        <netty.version>4.1.22.Final</netty.version>
     </properties>
 
     <dependencies>
@@ -53,6 +54,13 @@
             </exclusions>
         </dependency>
 
+        <!-- Netty -->
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-all</artifactId>
+            <version>${netty.version}</version>
+        </dependency>
+
         <!-- COMPONENTS -->
         <dependency>
             <groupId>org.projectlombok</groupId>

src/main/java/mc/core/Config.java

@@ -8,4 +8,6 @@ public interface Config {
     int getMaxPlayers();
     String getDescriptionServer();
     String getFaviconBase64();
+    String getHost();
+    int getPort();
 }

src/main/java/mc/core/Main.java

@@ -14,8 +14,11 @@ public class Main {
         ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
         Config config = context.getBean("config", Config.class);
 
-        log.info("Description: {}", config.getDescriptionServer());
-        log.info("Max online: {}", config.getMaxPlayers());
-        log.info("Favicon (base64): {}", config.getFaviconBase64());
+        Server server = context.getBean("server", Server.class);
+        try {
+            server.start(config.getHost(), config.getPort());
+        } catch (StartServerException e) {
+            log.error("Can't start server", e);
+        }
     }
 }

src/main/java/mc/core/Server.java

@@ -0,0 +1,9 @@
+/*
+ * DmitriyMX <dimon550@gmail.com>
+ * 2018-04-08
+ */
+package mc.core;
+
+public interface Server {
+    void start(String host, int port) throws StartServerException;
+}

src/main/java/mc/core/StartServerException.java

@@ -0,0 +1,11 @@
+/*
+ * DmitriyMX <dimon550@gmail.com>
+ * 2018-04-08
+ */
+package mc.core;
+
+public class StartServerException extends Exception {
+    public StartServerException(Throwable cause) {
+        super(cause);
+    }
+}

src/main/java/mc/core/embedded/ConfigFromSpring.java

@@ -5,6 +5,7 @@
 package mc.core.embedded;
 
 import lombok.Getter;
+import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 import mc.core.Config;
 import org.apache.commons.io.FileUtils;
@@ -16,13 +17,18 @@ import java.util.Base64;
 @Slf4j
 @Getter
 public class ConfigFromSpring implements Config {
+    @Setter
     private String descriptionServer;
     private String faviconBase64;
+    @Setter
     private int maxPlayers;
+    @Setter
+    private String host;
+    @Setter
+    private int port;
 
-    public ConfigFromSpring(String descriptionServer, int maxPlayers, File faviconImageFile) {
-        this.descriptionServer = descriptionServer;
-        this.maxPlayers = maxPlayers;
+    public void setFaviconBase64(File faviconImageFile) {
+        log.debug("faviconImageFile: {}", faviconImageFile.getAbsolutePath());
         try {
             faviconBase64 = new String(
                 Base64.getEncoder().encode(
@@ -30,7 +36,7 @@ public class ConfigFromSpring implements Config {
                 )
             );
         } catch (IOException e) {
-            log.warn("Con't load favicon", e);
+            log.warn("Can't load favicon", e);
             faviconBase64 = null;
         }
     }

src/main/java/mc/core/netty/NettyServer.java

@@ -0,0 +1,54 @@
+/*
+ * DmitriyMX <dimon550@gmail.com>
+ * 2018-04-08
+ */
+package mc.core.netty;
+
+import io.netty.bootstrap.ServerBootstrap;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioServerSocketChannel;
+import io.netty.handler.logging.LoggingHandler;
+import mc.core.Server;
+import mc.core.StartServerException;
+
+public class NettyServer implements Server{
+    private EventLoopGroup bossGroup, workerGroup;
+
+    private ChannelInitializer buildChannelInitializer() {
+        return new ChannelInitializer<SocketChannel>() {
+            @Override
+            protected void initChannel(SocketChannel socketChannel) {
+                socketChannel.pipeline().addLast(
+                        new LoggingHandler()
+                );
+            }
+        };
+    }
+
+    private ServerBootstrap buildServerBootstrap() {
+        ServerBootstrap bootstrap = new ServerBootstrap();
+
+        bootstrap.group(bossGroup, workerGroup)
+                .channel(NioServerSocketChannel.class)
+                .childHandler(buildChannelInitializer());
+
+        return bootstrap;
+    }
+
+    @Override
+    public void start(String host, int port) throws StartServerException {
+        bossGroup = new NioEventLoopGroup(1);
+        workerGroup = new NioEventLoopGroup();
+
+        ServerBootstrap serverBootstrap = buildServerBootstrap();
+
+        try {
+            serverBootstrap.bind(host, port).sync().channel().closeFuture().sync();
+        } catch (InterruptedException e) {
+            throw new StartServerException(e);
+        }
+    }
+}

src/main/resources/spring.xml

@@ -3,8 +3,12 @@
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
     <bean id="config" class="mc.core.embedded.ConfigFromSpring">
-        <constructor-arg index="0" type="java.lang.String" value="MC Core"/>
-        <constructor-arg index="1" type="int" value="100"/>
-        <constructor-arg index="2" type="java.io.File" value="icon.png"/>
+        <property name="descriptionServer" value="MC Core"/>
+        <property name="maxPlayers" value="100"/>
+        <property name="faviconBase64" value="icon.png"/>
+        <property name="host" value="127.0.0.1"/>
+        <property name="port" value="25565"/>
     </bean>
+
+    <bean id="server" class="mc.core.netty.NettyServer"/>
 </beans>