[Common] TrackTuner: dca calib. "autodetection" based on run number. (#13493)

Co-authored-by: mattia <mfaggin@cern.ch>

Author: mfaggin

Common/Tools/TrackPropagationModule.h

@@ -27,6 +27,7 @@
 #include <Framework/AnalysisHelpers.h>
 #include <Framework/Configurable.h>
 #include <Framework/DataTypes.h>
+#include <Framework/DeviceSpec.h>
 #include <Framework/HistogramRegistry.h>
 #include <Framework/HistogramSpec.h>
 #include <Framework/Logger.h>
@@ -104,6 +105,7 @@ class TrackPropagationModule
   o2::dataformats::VertexBase mVtx;
   o2::track::TrackParametrization<float> mTrackPar;
   o2::track::TrackParametrizationWithError<float> mTrackParCov;
+  bool autoDetectDcaCalib = false; // track tuner setting
 
   template <typename TConfigurableGroup, typename TInitContext, typename THistoRegistry>
   void init(TConfigurableGroup const& cGroup, TrackTuner& trackTunerObj, THistoRegistry& registry, TInitContext& initContext)
@@ -155,8 +157,8 @@ class TrackPropagationModule
     }
 
     /// TrackTuner initialization
+    std::string outputStringParams = "";
     if (cGroup.useTrackTuner.value) {
-      std::string outputStringParams = "";
       switch (cGroup.trackTunerConfigSource.value) {
         case o2::aod::track_tuner::InputString:
           outputStringParams = trackTunerObj.configParams(cGroup.trackTunerParams.value);
@@ -170,10 +172,34 @@ class TrackPropagationModule
           break;
       }
 
-      trackTunerObj.getDcaGraphs();
+      /// read the track tuner instance configurations,
+      /// to understand whether the TrackTuner::getDcaGraphs function can be called here (input path from string/configurables)
+      /// or inside the process function, to "auto-detect" the input file based on the run number
+      const auto& workflows = initContext.services().template get<o2::framework::RunningWorkflowInfo const>();
+      for (const o2::framework::DeviceSpec& device : workflows.devices) { /// loop over devices
+        if (device.name == "propagation-service") {
+          // loop over the options
+          // to find the value of TrackTuner::autoDetectDcaCalib
+          for (const auto& option : device.options) { /// loop over options
+            if (option.name == "trackTuner.autoDetectDcaCalib") {
+              // found it!
+              autoDetectDcaCalib = option.defaultValue.get<bool>();
+              break;
+            }
+          } /// end loop over options
+          break;
+        }
+      } /// end loop over devices
+      LOG(info) << "[TrackPropagationModule]  trackTuner.autoDetectDcaCalib it's equal to " << autoDetectDcaCalib;
+      if (!autoDetectDcaCalib) {
+        LOG(info) << "[TrackPropagationModule]  retrieve the graphs already (we are in propagationService::Init() function)";
+        trackTunerObj.getDcaGraphs();
+      } else {
+        LOG(info) << "[TrackPropagationModule]  trackTunerObj.getDcaGraphs() function to be called later, in the process function!";
+      }
     }
 
-    trackTunedTracks = registry.template add<TH1>("trackTunedTracks", "trackTunedTracks", o2::framework::kTH1D, {{1, 0.5f, 1.5f}});
+    trackTunedTracks = registry.template add<TH1>("trackTunedTracks", outputStringParams.c_str(), o2::framework::kTH1D, {{1, 0.5f, 1.5f}});
 
     // Histograms for track tuner
     o2::framework::AxisSpec axisBinsDCA = {600, -0.15f, 0.15f, "#it{dca}_{xy} (cm)"};
@@ -186,6 +212,23 @@ class TrackPropagationModule
   template <bool isMc, typename TConfigurableGroup, typename TCCDBLoader, typename TCollisions, typename TTracks, typename TOutputGroup, typename THistoRegistry>
   void fillTrackTables(TConfigurableGroup const& cGroup, TrackTuner& trackTunerObj, TCCDBLoader const& ccdbLoader, TCollisions const& collisions, TTracks const& tracks, TOutputGroup& cursors, THistoRegistry& registry)
   {
+
+    /// retrieve the TrackTuner calibration graphs *if not done yet*
+    /// i.e. if autodetect is required
+    if (cGroup.useTrackTuner.value && autoDetectDcaCalib && !trackTunerObj.areGraphsConfigured) {
+
+      /// get the run number from the ccdb loader, already initialized
+      const int runNumber = ccdbLoader.runNumber;
+      trackTunerObj.setRunNumber(runNumber);
+
+      /// setup the "auto-detected" path based on the run number
+      trackTunerObj.getPathInputFileAutomaticFromCCDB();
+      trackTunedTracks->SetTitle(trackTunerObj.outputString.c_str());
+
+      /// now that the path is ok, retrieve the graphs
+      trackTunerObj.getDcaGraphs();
+    }
+
     if (!fillTracks) {
       return; // suppress everything
     }