DPL: use constexpr for data description of EOS data header

Author: ehellbar

DataFormats/Headers/include/Headers/DataHeader.h

@@ -600,6 +600,7 @@ constexpr o2::header::DataDescription gDataDescriptionClusters{"CLUSTERS"};
 constexpr o2::header::DataDescription gDataDescriptionTracks{"TRACKS"};
 constexpr o2::header::DataDescription gDataDescriptionConfig{"CONFIGURATION"};
 constexpr o2::header::DataDescription gDataDescriptionInfo{"INFORMATION"};
+constexpr o2::header::DataDescription gDataDescriptionEos{"EOS"};
 constexpr o2::header::DataDescription gDataDescriptionROOTStreamers{"ROOT STREAMERS"};
 constexpr o2::header::DataDescription gDataDescriptionDISTSTF{"DISTSUBTIMEFRAME"};
 /// @} // end of doxygen group

Framework/Core/src/ExternalFairMQDeviceProxy.cxx

@@ -1005,7 +1005,7 @@ DataProcessorSpec specifyFairMQDeviceOutputProxy(char const* name,
         }
         DataHeader dh;
         dh.dataOrigin = "DPL";
-        dh.dataDescription = "EOS";
+        dh.dataDescription = o2::header::gDataDescriptionEos;
         dh.subSpecification = 0;
         dh.payloadSize = 0;
         dh.runNumber = runNumber;
@@ -1137,7 +1137,7 @@ DataProcessorSpec specifyFairMQDeviceMultiOutputProxy(char const* name,
         }
         DataHeader dh;
         dh.dataOrigin = "DPL";
-        dh.dataDescription = "EOS";
+        dh.dataDescription = o2::header::gDataDescriptionEos;
         dh.subSpecification = 0;
         dh.payloadSize = 0;
         dh.payloadSerializationMethod = o2::header::gSerializationMethodNone;

Framework/Core/test/test_ExternalFairMQDeviceWorkflow.cxx

@@ -243,7 +243,7 @@ std::vector<DataProcessorSpec> defineDataProcessing(ConfigContext const& config)
           // since we are sending on the bare channel, also the EOS message needs to be created.
           DataHeader dhEOS;
           dhEOS.dataOrigin = "DPL";
-          dhEOS.dataDescription = "EOS";
+          dhEOS.dataDescription = o2::header::gDataDescriptionEos;
           dhEOS.subSpecification = 0;
           dhEOS.payloadSize = 0;
           dhEOS.payloadSerializationMethod = o2::header::gSerializationMethodNone;