@Override
            public void doRun(final String key, final TimerTask timerTask) {
                masterCheck();
            }
Instantiates a new Websocket sync cache.

@param websocketConfig the websocket config
@param shenyuConfig the shenyu config
@param pluginDataSubscriber the plugin data subscriber
@param metaDataSubscribers the meta data subscribers
@param authDataSubscribers the auth data subscribers
@param proxySelectorDataSubscribers the proxy selector data subscribers
@param discoveryUpstreamDataSubscribers the discovery upstream data subscribers
shenyu-sync-data-center/shenyu-sync-data-websocket/src/main/java/org/apache/shenyu/plugin/sync/data/websocket/WebsocketSyncDataService.java