NOTICKET: Setup and Sepcify Websocket Structure

src/main/java/de/towerdefence/server/server/channels/connection/ConnectionWebsocketHandler.java

@@ -22,12 +22,11 @@ public class ConnectionWebsocketHandler extends JsonWebsocketHandler {
     protected void handleTextMessage(WebSocketSession session, TextMessage message) {
         try{
             String payload = message.getPayload();
-            switch ( objectMapper.readTree(payload).get("$id").asText().toLowerCase()) {
-                case "requestconnectiontoken" -> handleRequestConnectionToken(session, payload);
+            switch ( objectMapper.readTree(payload).get("$id").asText()) {
+                case RequestConnectionTokenMessage.MESSAGE_ID -> handleRequestConnectionToken(session, payload);
                 default -> this.closeSession(session, CloseStatus.BAD_DATA);
             }
-        } catch (Exception exception) {
-            System.out.println(exception.getMessage());
+        } catch (Exception ignored) {
             this.closeSession(session, CloseStatus.BAD_DATA);
         }
     }

src/main/java/de/towerdefence/server/server/channels/connection/in/RequestConnectionTokenMessage.java

@@ -8,6 +8,8 @@ import lombok.*;
 @Data
 @NotNull
 public class RequestConnectionTokenMessage {
+    public static final String MESSAGE_ID = "RequestConnectionToken";
+
     @JsonProperty("$id")
     private String messageId;
     private Channel channel;

ws/ws.yml

@@ -7,7 +7,7 @@ info:
     Because of the limitations of Async API, we expect that the actual json,
     which is send as payload to always contain a field called `$id` with 
     the corresponding `messageId`. <br>
-    The `messageId` should be handled case insensitive.
+    The `messageId` should be handled case sensitive.
 defaultContentType: application/json
 servers:
   localhost: