How to use

isNull

method

in

org.stagemonitor.core.MeasurementSession

private synchronized void createMeasurementSession() {
  if (Stagemonitor.getMeasurementSession().isNull()) {
    MeasurementSession session = new MeasurementSession(corePlugin.getApplicationName(), corePlugin.getHostName(),
        corePlugin.getInstanceName());
    Stagemonitor.setMeasurementSession(session);
  }
}

public <T extends RequestTrace> void monitorStart(MonitoredRequest<T> monitoredRequest) {
  final long start = System.nanoTime();
  RequestInformation<T> info = new RequestInformation<T>();
  info.monitoredRequest = monitoredRequest;
  detectForwardedRequest(info);
  request.set(info);
  try {
    if (!corePlugin.isStagemonitorActive()) {
      return;
    }
    if (Stagemonitor.getMeasurementSession().isNull()) {
      createMeasurementSession();
    }
    info.firstRequest = noOfRequests.get() == 0;
    if (Stagemonitor.getMeasurementSession().getInstanceName() == null) {
      getInstanceNameFromExecution(monitoredRequest);
    }
    if (info.monitorThisRequest()) {
      if (!Stagemonitor.isStarted()) {
        info.startup = Stagemonitor.startMonitoring();
      }
      beforeExecution(monitoredRequest, info);
    }
  } finally {
    info.overhead1 = System.nanoTime() - start;
  }
}