MessageHandlerRegistry 구현

 import { Socket } from "socket.io";
-import { MessageHandlerRegister } from "../message/handler/MessageHandlerRegister";
+import { MessageHandlerRegistry } from "../message/MessageHandlerRegistry";
 import { User } from "../user/User";
 
 export class Connection {
@@ -10,7 +10,7 @@ export class Connection {
   constructor(socket: Socket) {
     this.socket = socket;
 
-    MessageHandlerRegister.registerMessageHandlers(this);
+    MessageHandlerRegistry.registerHandlers(this);
   }
 
   public get authenticated(): boolean {

+import { Connection } from "../connection/Connection";
+import { loginHandler } from "./handler/LoginHandler";
+import { MessageType } from "./types";
+
+export class MessageHandlerRegistry {
+  static registerHandlers(connection: Connection) {
+    this.registerHandler(connection, MessageType.LOGIN, loginHandler);
+  }
+
+  private static registerHandler<T>(
+    connection: Connection,
+    typeName: string,
+    handler: (connection: Connection, message: T) => void
+  ) {
+    connection.socket.on(typeName, (message: T) => {
+      handler(connection, message);
+    });
+  }
+}

 import { Connection } from "../../connection/Connection";
 import { User } from "../../user/User";
 import { LoginMessage } from "../types";
-import { MessageHandler } from "./MessageHandler";
 
-export class LoginHandler implements MessageHandler<LoginMessage> {
-  public handle(connection: Connection, message: LoginMessage): void {
-    connection.user = new User(message.username);
-    console.log(`User ${message.username} has logged in!`);
-  }
+export function loginHandler(
+  connection: Connection,
+  message: LoginMessage
+): void {
+  connection.user = new User(message.username);
+  console.log(`User ${message.username} has logged in!`);
 }

-import { Connection } from "../../connection/Connection";
-
-export interface MessageHandler<T> {
-  handle(connection: Connection, message: T): void;
-}

-import { Connection } from "../../connection/Connection";
-import { LoginMessage } from "../types";
-import { LoginHandler } from "./LoginHandler";
-
-export class MessageHandlerRegister {
-  static registerMessageHandlers(connection: Connection) {
-    connection.socket.on("login", (message: LoginMessage) => {
-      new LoginHandler().handle(connection, message);
-    });
-  }
-}

 export interface LoginMessage {
   username: string;
 }
+
+export class MessageType {
+  static readonly LOGIN = "login";
+}