code: public ProxyDataSourceBuilder logSlowQueryByJUL(long thresholdTime, TimeUnit timeUnit, Level logLevel, String loggerName) {
          this.createJulSlowQueryListener = true;
          this.slowQueryThreshold = thresholdTime;
          this.slowQueryTimeUnit = timeUnit;
          this.julSlowQueryLogLevel = logLevel;
          this.julSlowQueryLoggerName = loggerName;
          return this;
      }
docs: Register {@link JULSlowQueryListener}.
  
  @param thresholdTime slow query threshold time
  @param timeUnit      slow query threshold time unit
  @param logLevel      log level for JUL
  @param loggerName    JUL logger name
  @return builder
  @since 1.4.1