HttpRequestHandler
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/----------\
/ \
/ \
WebSocketHttpRequestHandler SockJsHttpRequestHandler(So,text message need json format,strictly is json array)
| |
SubProtocolWebSocketHandler SockJsWebSocketHandler
| |
| WebSocketServerSockJsSession -> handleMessage -> Jackson2SockJsMessageCodec -> decode
| |
StompSubProtocolHandler StompSubProtocolHandler
|