How to use

setAndUpdate

method

in

org.rrd4j.core.Sample

/**
 * Performs update of the rrd with the current value of the gauge
 * @throws IOException
 */
public void update() throws IOException {
  logger.debug("RRDRequestExecutionTimeGauge.update() rrdFileName is {}", rrdFileName);
  RrdDb rrdDb = new RrdDb(rrdFileName);
  try {
    Sample sample = rrdDb.createSample();
    long currentTimeSecs =   Util.getTime();
    String update = Long.toString(currentTimeSecs) +':'+
            (long) gauge.resetAndGetAverageExecutionTime()+':';
    sample.setAndUpdate(update);
    logger.debug("RRDRequestExecutionTimeGauge.update() updated with : {}", update);
  } finally {
    rrdDb.close();
    logger.debug("RRDRequestExecutionTimeGauge.update() succeeded");
  }
}

/**
 *
 * @throws IOException
 */
public void update() throws IOException {
  logger.debug("RRDRequestCounter.update() rrdFileName is {}", rrdFileName);
  RrdDb rrdDb = new RrdDb(rrdFileName);
  Sample sample = rrdDb.createSample();
  long currentTimeSecs =   Util.getTime();
  StringBuilder sb = new StringBuilder();
  sb.append(currentTimeSecs).append(':');
  sb.append(counter.getTotalRequests()).append(':');
  sb.append(counter.getFailed());
  sample.setAndUpdate(sb.toString());
  logger.debug("RRDRequestCounter.update() updated with : {}", sb);
  rrdDb.close();
  logger.debug("RRDRequestCounter.update() succeeded");
  logger.debug("RRDRequestCounter.update() let us try to fetch data");
  rrdDb = new RrdDb(rrdFileName);
  if(dumpstart == null) {
       dumpstart = currentTimeSecs - 100;
  }
  FetchRequest fetchRequest = rrdDb.createFetchRequest(ConsolFun.AVERAGE, dumpstart, currentTimeSecs+1);
  FetchData fetchData = fetchRequest.fetchData();
  logger.debug("RRDRequestCounter.update() dump is: {}", fetchData.dump());
  rrdDb.close();
}