dqutils::MonitoringFile::GatherStatistics Node1 dqutils::MonitoringFile ::GatherStatistics + m_nHist1D + m_nHist1DBins + m_nGraph + m_nGraphPoints + m_nHist2D + m_nHist2DBins + m_nEfficiency + m_nEfficiencyBins + GatherStatistics() + execute() + execute() + execute() Node2 dqutils::MonitoringFile ::HistogramOperation + ~HistogramOperation() + execute() + execute() + execute() + executeMD() + executeMD() + executeMD() Node2->Node1 Node3 std::string Node3->Node1 +m_dirName Node4 std::basic_string< char > Node4->Node3