[MCH] added checker for ClustersTask output (#2276)

The checker verifies that the clusters sizes and tracks-clusters
association are within configurable limits

Modules/MUON/MCH/CMakeLists.txt

@@ -30,6 +30,7 @@ set(SRCS
   src/DecodingCheck.cxx
   src/DigitsCheck.cxx
   src/PreclustersCheck.cxx
+  src/ClustersCheck.cxx
   src/TracksTask.cxx
   src/DecodingPostProcessing.cxx
   src/DigitsPostProcessing.cxx
@@ -70,6 +71,7 @@ set(HEADERS
   include/MCH/DecodingCheck.h
   include/MCH/DigitsCheck.h
   include/MCH/PreclustersCheck.h
+  include/MCH/ClustersCheck.h
   include/MCH/TracksTask.h
   include/MCH/DedodingPostProcessing.h
   include/MCH/DigitsPostProcessing.h
@@ -150,6 +152,7 @@ add_root_dictionary(${MODULE_NAME}
                             include/MCH/PreclustersTask.h
                             include/MCH/DigitsCheck.h
                             include/MCH/PreclustersCheck.h
+                            include/MCH/ClustersCheck.h
                             include/MCH/DecodingTask.h
                             include/MCH/DecodingCheck.h
                             include/MCH/ErrorTask.h

Modules/MUON/MCH/etc/qc-mch-clusters.json

@@ -39,7 +39,42 @@
         "location": "remote"
       }
     },
-    "checks": {}
+    "checks": {
+      "ClustersCheck": {
+        "active": "true",
+        "className": "o2::quality_control_modules::muonchambers::ClustersCheck",
+        "moduleName": "QcMuonChambers",
+        "detectorName": "MCH",
+        "policy": "OnAll",
+        "extendedCheckParameters": {
+          "default": {
+            "default": {
+              "minClustersPerTrack": "9.5",
+              "maxClustersPerTrack": "11.5",
+              "minClustersPerChamber": "0.8",
+              "clustersPerChamberRangeMin": "0.6",
+              "clustersPerChamberRangeMax": "1.2",
+              "minClusterSize": "6",
+              "clusterSizeRangeMin": "0",
+              "clusterSizeRangeMax": "10",
+              "markerSize": "0.8"
+            }
+          }
+        },
+        "dataSource": [
+          {
+            "type": "Task",
+            "name": "MCHClusters",
+            "MOs" : "all"
+            "MOs" : [
+              "ClustersPerTrack",
+              "ClustersPerChamber",
+              "ClusterSizePerChamber"
+            ]
+          }
+        ]
+      }
+    }
   },
   "dataSamplingPolicies": []
 }

Modules/MUON/MCH/include/MCH/ClustersCheck.h

@@ -0,0 +1,74 @@
+// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
+// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
+// All rights not expressly granted are reserved.
+//
+// This software is distributed under the terms of the GNU General Public
+// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
+//
+// In applying this license CERN does not waive the privileges and immunities
+// granted to it by virtue of its status as an Intergovernmental Organization
+// or submit itself to any jurisdiction.
+
+///
+/// \file   ClustersCheck.h
+/// \author Andrea Ferrero
+///
+
+#ifndef QC_MODULE_MCH_CLUSTERSCHECK_H
+#define QC_MODULE_MCH_CLUSTERSCHECK_H
+
+#include "QualityControl/CheckInterface.h"
+#include "QualityControl/Quality.h"
+#include <string>
+
+namespace o2::quality_control::core
+{
+class MonitorObject;
+}
+
+namespace o2::quality_control_modules::muonchambers
+{
+
+/// \brief  Check if the clusters sizes and tracks-clusters association is within expected limits
+///
+/// \author Andrea Ferrero
+class ClustersCheck : public o2::quality_control::checker::CheckInterface
+{
+ public:
+  /// Default constructor
+  ClustersCheck() = default;
+  /// Destructor
+  ~ClustersCheck() override = default;
+
+  // Override interface
+  void configure() override;
+  void startOfActivity(const Activity& activity) override;
+  Quality check(std::map<std::string, std::shared_ptr<MonitorObject>>* moMap) override;
+  void beautify(std::shared_ptr<MonitorObject> mo, Quality checkResult = Quality::Null) override;
+  std::string getAcceptedType() override;
+
+ private:
+  /// quality flag associated to each input plot
+  std::unordered_map<std::string, Quality> mQualities;
+  /// acceptable limits for the average number of clusters associated tracks
+  double mMinClustersPerTrack{ 9 };
+  double mMaxClustersPerTrack{ 11 };
+  /// minimum acceptale number of clusters per track in each chamber
+  double mMinClustersPerChamber{ 0.8 };
+  /// vertical range of the cluster per chamber plot
+  double mClustersPerChamberRangeMin{ 0.6 };
+  double mClustersPerChamberRangeMax{ 1.2 };
+  /// minimum acceptable value for the average cluster size per chamber
+  double mMinClusterSize{ 4 };
+  /// vertical range of the cluster size per chamber plot
+  double mClusterSizeRangeMin{ 0 };
+  double mClusterSizeRangeMax{ 10 };
+  /// size of the marker showing the average number of clusters
+  float mMarkerSize{ 1.2 };
+
+  ClassDefOverride(ClustersCheck, 1);
+};
+
+} // namespace o2::quality_control_modules::muonchambers
+
+#endif // QC_MODULE_MCH_CLUSTERSCHECK_H

Modules/MUON/MCH/include/MCH/LinkDef.h

@@ -24,6 +24,7 @@
 #pragma link C++ class o2::quality_control_modules::muonchambers::DecodingCheck + ;
 #pragma link C++ class o2::quality_control_modules::muonchambers::DigitsCheck + ;
 #pragma link C++ class o2::quality_control_modules::muonchambers::PreclustersCheck + ;
+#pragma link C++ class o2::quality_control_modules::muonchambers::ClustersCheck + ;
 // Aggregators
 // legacy tasks
 #pragma link C++ class o2::quality_control_modules::muonchambers::PhysicsTaskDigits + ;