Use the EventLoop default

Author: jmcarcell

test/k4FWCoreTest/options/ExampleFunctionalProducerHist.py

@@ -58,22 +58,12 @@
 root_hist_svc.FileName = "functional_producer_hist.root"
 
 
-if not multithreaded:
-    app = ApplicationMgr(
-        TopAlg=[producer1, producer2],
-        EvtSel="NONE",
-        EvtMax=10,
-        ExtSvc=[root_hist_svc] + ([whiteboard] if multithreaded else []),
-        OutputLevel=INFO,
-        HistogramPersistency="ROOT",
-    )
-else:
-    app = ApplicationMgr(
-        TopAlg=[producer1, producer2],
-        EvtSel="NONE",
-        EvtMax=10,
-        ExtSvc=[root_hist_svc] + ([whiteboard] if multithreaded else []),
-        OutputLevel=INFO,
-        HistogramPersistency="ROOT",
-        EventLoop=slimeventloopmgr,
-    )
+app = ApplicationMgr(
+    TopAlg=[producer1, producer2],
+    EvtSel="NONE",
+    EvtMax=10,
+    ExtSvc=[root_hist_svc] + ([whiteboard] if multithreaded else []),
+    OutputLevel=INFO,
+    HistogramPersistency="ROOT",
+    EventLoop="EventLoopMgr" if not multithreaded else slimeventloopmgr,
+)

test/k4FWCoreTest/src/components/ExampleFunctionalProducerHist.cpp

@@ -37,7 +37,7 @@ struct ExampleFunctionalProducerHist final : k4FWCore::Producer<edm4hep::MCParti
     // Not thread-safe!
     Rndm::Numbers rndu(randSvc(), Rndm::Flat(0, 1));
     ++m_histograms[rndu()];
-    // Return an empty collection since we don't care about the collection
+    // Return an empty collection since we don't care about the collection for this example
     return {};
   }