AOD: Introduce CreatedBy MetaData field (#14351)

* AOD: Introduce CreatedBy MetaData field

Allows to know who created this AOD, which in turn might
be used to lookup further MetaData from CCDB or just to know
whom to contact.

Author: sawenzel

Detectors/AOD/include/AODProducerWorkflow/AODProducerWorkflowSpec.h

@@ -271,6 +271,7 @@ class AODProducerWorkflowDPL : public Task
   TString mAnchorPass{""};
   TString mAnchorProd{""};
   TString mRecoPass{""};
+  TString mUser{"aliprod"}; // who created this AOD (aliprod, alidaq, individual users)
   TStopwatch mTimer;
   bool mEMCselectLeading{false};
   uint64_t mEMCALTrgClassMask = 0;

Detectors/AOD/src/AODProducerWorkflowSpec.cxx

@@ -1675,6 +1675,7 @@ void AODProducerWorkflowDPL::init(InitContext& ic)
   mLPMProdTag = ic.options().get<string>("lpmp-prod-tag");
   mAnchorPass = ic.options().get<string>("anchor-pass");
   mAnchorProd = ic.options().get<string>("anchor-prod");
+  mUser = ic.options().get<string>("created-by");
   mRecoPass = ic.options().get<string>("reco-pass");
   mTFNumber = ic.options().get<int64_t>("aod-timeframe-id");
   mRecoOnly = ic.options().get<int>("reco-mctracks-only");
@@ -2398,8 +2399,8 @@ void AODProducerWorkflowDPL::run(ProcessingContext& pc)
   TString dataType = mUseMC ? "MC" : "RAW";
   TString O2Version = o2::fullVersion();
   TString ROOTVersion = ROOT_RELEASE;
-  mMetaDataKeys = {"DataType", "Run", "O2Version", "ROOTVersion", "RecoPassName", "AnchorProduction", "AnchorPassName", "LPMProductionTag"};
-  mMetaDataVals = {dataType, "3", O2Version, ROOTVersion, mRecoPass, mAnchorProd, mAnchorPass, mLPMProdTag};
+  mMetaDataKeys = {"DataType", "Run", "O2Version", "ROOTVersion", "RecoPassName", "AnchorProduction", "AnchorPassName", "LPMProductionTag", "CreatedBy"};
+  mMetaDataVals = {dataType, "3", O2Version, ROOTVersion, mRecoPass, mAnchorProd, mAnchorPass, mLPMProdTag, mUser};
   pc.outputs().snapshot(Output{"AMD", "AODMetadataKeys", 0}, mMetaDataKeys);
   pc.outputs().snapshot(Output{"AMD", "AODMetadataVals", 0}, mMetaDataVals);
 
@@ -3256,6 +3257,7 @@ DataProcessorSpec getAODProducerWorkflowSpec(GID::mask_t src, bool enableSV, boo
       ConfigParamSpec{"anchor-pass", VariantType::String, "", {"AnchorPassName"}},
       ConfigParamSpec{"anchor-prod", VariantType::String, "", {"AnchorProduction"}},
       ConfigParamSpec{"reco-pass", VariantType::String, "", {"RecoPassName"}},
+      ConfigParamSpec{"created-by", VariantType::String, "", {"Who created this AO2D"}},
       ConfigParamSpec{"nthreads", VariantType::Int, std::max(1, int(std::thread::hardware_concurrency() / 2)), {"Number of threads"}},
       ConfigParamSpec{"reco-mctracks-only", VariantType::Int, 0, {"Store only reconstructed MC tracks and their mothers/daughters. 0 -- off, != 0 -- on"}},
       ConfigParamSpec{"ctpreadout-create", VariantType::Int, 0, {"Create CTP digits from detector readout and CTP inputs. !=1 -- off, 1 -- on"}},