public static RealTimeQuery getInstance() {
        if (realTimeQuery == null) {
            synchronized (Configuration.class) {
                if (realTimeQuery == null) {
                    realTimeQuery = new RealTimeQuery();
                }
            }
        }
        return realTimeQuery;
    }
Real time query data from audit source.
inlong-audit/audit-service/src/main/java/org/apache/inlong/audit/service/cache/RealTimeQuery.java