| Package | Description | 
|---|---|
| org.springframework.web.socket.messaging | WebSocket integration for Spring's messaging module. | 
| org.springframework.web.socket.sockjs.transport.handler | TransportHandlerimplementation classes as well as a concreteSockJsService. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | SubProtocolWebSocketHandlerAn implementation of  WebSocketHandlerthat delegates incoming WebSocket
 messages to aSubProtocolHandleralong with aMessageChannelto which
 the sub-protocol handler can send messages from WebSocket clients to the application. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | SockJsWebSocketHandlerAn implementation of  WebSocketHandlerthat adds SockJS messages frames, sends
 SockJS heartbeat messages, and delegates lifecycle events and messages to a targetWebSocketHandler. |