private WebSocketRuleHandle buildRuleHandle(final RuleData rule) {
        return WebSocketPluginDataHandler.CACHED_HANDLE.get().obtainHandle(CacheKeyUtils.INST.getKey(rule));
    }
Instantiates a new Web socket plugin.

@param webSocketClient  the web socket client
@param webSocketService the web socket service
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-websocket/src/main/java/org/apache/shenyu/plugin/websocket/WebSocketPlugin.java