| void | WebSocketHandler. onBinaryMessage(WebSocketConnection connection,
               T state,
               byte[] result,
               int size) | 
| void | WebSocketHandler. onClose(WebSocketConnection connection,
       T state) | 
| void | WebSocketHandler. onError(WebSocketConnection connection,
       T state,
       String msg) | 
| void | WebSocketHandler. onException(WebSocketConnection connection,
           T state,
           Exception failed) | 
| void | WebSocketHandler. onMessage(WebSocketConnection connection,
         T state,
         String msg) | 
| T | WebSocketHandler. onOpen(WebSocketConnection connection,
      HttpRequest headers,
      S sessionState) | 
| default void | WebSocketHandler. onPing(WebSocketConnection connection,
      T state,
      byte[] result,
      int size,
      StringDecoder charset) | 
| default void | WebSocketHandler. onPong(WebSocketConnection connection,
      T state,
      byte[] result,
      int size) |