geode-client-native/src/cppcache/statistics/StatSamplerStats.cpp

/*=========================================================================
 * Copyright (c) 2004-2014 Pivotal Software, Inc. All Rights Reserved.
 * This product is protected by U.S. and international copyright
 * and intellectual property laws. Pivotal products are covered by
 * more patents listed at http://www.pivotal.io/patents.
 *=========================================================================
 */

#include "StatSamplerStats.hpp"
using namespace gemfire_statistics;


/**
  * Statistics related to the statistic sampler.
*/

StatSamplerStats::StatSamplerStats ()
{
  StatisticsFactory * statFactory = StatisticsFactory::getExistingInstance();
   statDescriptorArr = new StatisticDescriptor*[2];
   statDescriptorArr[0] = statFactory->createIntCounter("sampleCount",
           "Total number of samples taken by this sampler.", "samples", false);
  
   statDescriptorArr[1] = statFactory->createLongCounter("sampleTime",
           "Total amount of time spent taking samples.", "milliseconds", false);
  
   samplerType = statFactory->createType("StatSampler", "Stats on the statistic sampler.", StatSamplerStats::statDescriptorArr,2);
   sampleCountId = samplerType->nameToId("sampleCount");
   sampleTimeId = samplerType->nameToId("sampleTime");
   this->samplerStats = statFactory->createStatistics(samplerType, "statSampler", statFactory->getId());
}


/**
 * The default values of the individual Stats descriptors are zero.
 * This function can be used to set initial values to the descriptors.
 */
void StatSamplerStats::setInitialValues()
{
   if (samplerStats)
   {
      samplerStats->setInt(sampleCountId, 0);
      samplerStats->setLong(sampleTimeId, 0);
   }
}


/**
 * This function is called to refresh the values
 * of the individual Stats descriptors.
 */
void StatSamplerStats::tookSample(int64 nanosSpentWorking)
{
   if (samplerStats)
   {
      samplerStats->incInt(sampleCountId, 1);
      samplerStats->incLong(sampleTimeId, nanosSpentWorking / 1000000);
   }
}


/**
 * Calls the destroyStatistics() function of the factory
 * which deletes the Stats object
 * It is mandatory to call this function for proper deletion of stats objects.
 */
void StatSamplerStats::close()
{
   if (samplerStats)
   {
      samplerStats->close();
   }
}

/**
 * All objects are created by factory, and the reference is passed to this class
 * Factory takes the responsibility of deleting the objetcs.
 * Hence they can be simply set to NULL here.
 * But it is mandatory that StatSamplerStats::close() be called
 * before this destructor gets called,
 * otherwise samplerStats will not get deleted and a memory leak will occur.
 */
StatSamplerStats::~StatSamplerStats()
{
   samplerType = NULL;
   for (int32 i =0; i< 2; i++)
   {
      statDescriptorArr[i] = NULL;
   }
   samplerStats = NULL;
}