Bael 389 - Chat-like app using the Java API for WebSocket (#1265)

* Project for " A Guide to the Java API for WebSocket" article

* Setting dependencies correctly

* Formatting adjustments

* Removing tomcat7 maven plugin

* Applying formatt - No spaces

java-websocket/src/main/java/com/baeldung/websocket/MessageDecoder.java

@@ -0,0 +1,32 @@
+package com.baeldung.websocket;
+
+import javax.websocket.DecodeException;
+import javax.websocket.Decoder;
+import javax.websocket.EndpointConfig;
+
+import com.baeldung.model.Message;
+import com.google.gson.Gson;
+
+public class MessageDecoder implements Decoder.Text<Message> {
+    @Override
+    public Message decode(String s) throws DecodeException {
+        Gson gson = new Gson();
+        Message message = gson.fromJson(s, Message.class);
+        return message;
+    }
+
+    @Override
+    public boolean willDecode(String s) {
+        return (s != null);
+    }
+
+    @Override
+    public void init(EndpointConfig endpointConfig) {
+        // Custom initialization logic
+    }
+
+    @Override
+    public void destroy() {
+        // Close resources
+    }
+}