Fix data race in EventHeaderCreator

k4FWCore/components/EventHeaderCreator.cpp

@@ -26,13 +26,13 @@ EventHeaderCreator::EventHeaderCreator(const std::string& name, ISvcLocator* svc
                   "Name of the EventHeaderCollection that will be stored in the output root file.");
 }
 
-StatusCode EventHeaderCreator::execute(const EventContext&) const {
-  static int eventNumber = 0;
+StatusCode EventHeaderCreator::execute(const EventContext& ctx) const {
+  auto eventNumber = ctx.evt();
   debug() << "Filling EventHeader with runNumber " << int(m_runNumber) << " and eventNumber "
           << eventNumber + m_eventNumberOffset << endmsg;
   auto headers = m_headerCol.createAndPut();
   auto header  = headers->create();
   header.setRunNumber(m_runNumber);
-  header.setEventNumber(eventNumber++ + m_eventNumberOffset);
+  header.setEventNumber(eventNumber + m_eventNumberOffset);
   return StatusCode::SUCCESS;
 }

k4FWCore/components/EventHeaderCreator.h

@@ -19,6 +19,7 @@
 #ifndef K4FWCORE_EVENTHEADERCREATOR
 #define K4FWCORE_EVENTHEADERCREATOR
 
+#include <edm4hep/Constants.h>
 #include "Gaudi/Algorithm.h"
 #include "k4FWCore/DataHandle.h"
 
@@ -44,7 +45,8 @@ class EventHeaderCreator : public Gaudi::Algorithm {
       this, "eventNumberOffset", 0,
       "Event number offset, eventNumber will be filled with 'event_index + eventNumberOffset'"};
   // datahandle for the EventHeader
-  mutable DataHandle<edm4hep::EventHeaderCollection> m_headerCol{"EventHeader", Gaudi::DataHandle::Writer, this};
+  mutable DataHandle<edm4hep::EventHeaderCollection> m_headerCol{edm4hep::labels::EventHeader,
+                                                                 Gaudi::DataHandle::Writer, this};
 };
 
 #endif

test/k4FWCoreTest/CMakeLists.txt

@@ -137,12 +137,13 @@ add_test_with_env(FunctionalCollectionMerger options/ExampleFunctionalCollection
 add_test_with_env(FunctionalFilterFile options/ExampleFunctionalFilterFile.py)
 add_test_with_env(FunctionalMetadata options/ExampleFunctionalMetadata.py)
 add_test_with_env(FunctionalMetadataOldAlgorithm options/ExampleFunctionalMetadataOldAlgorithm.py)
+add_test_with_env(createEventHeaderConcurrent options/createEventHeaderConcurrent.py)
 
 add_test_with_env(FunctionalWrongImport options/ExampleFunctionalWrongImport.py)
 set_tests_properties(FunctionalWrongImport PROPERTIES PASS_REGULAR_EXPRESSION "ImportError: Importing ApplicationMgr or IOSvc from Configurables is not allowed.")
 
 add_test(NAME FunctionalCheckFiles COMMAND python3 ${CMAKE_CURRENT_LIST_DIR}/options/CheckOutputFiles.py)
-set_tests_properties(FunctionalCheckFiles PROPERTIES DEPENDS "FunctionalFile;FunctionalMTFile;FunctionalMultipleFile;FunctionalOutputCommands;FunctionalProducerAbsolutePath;FunctionalTransformerRuntimeEmpty;FunctionalMix;FunctionalMixIOSvc;FunctionalTransformerHist;FunctionalCollectionMerger;FunctionalFilterFile;FunctionalMetadata;FunctionalMetadataOldAlgorithm")
+set_tests_properties(FunctionalCheckFiles PROPERTIES DEPENDS "FunctionalFile;FunctionalMTFile;FunctionalMultipleFile;FunctionalOutputCommands;FunctionalProducerAbsolutePath;FunctionalTransformerRuntimeEmpty;FunctionalMix;FunctionalMixIOSvc;FunctionalTransformerHist;FunctionalCollectionMerger;FunctionalFilterFile;FunctionalMetadata;FunctionalMetadataOldAlgorithm;createEventHeaderConcurrent")
 
 # Do this after checking the files not to overwrite them
 add_test_with_env(FunctionalFile_toolong options/ExampleFunctionalFile.py -n 999 PROPERTIES DEPENDS FunctionalCheckFiles PASS_REGULAR_EXPRESSION

test/k4FWCoreTest/options/CheckOutputFiles.py

@@ -188,3 +188,24 @@ def check_events(filename, number):
         raise RuntimeError(
             f"Metadata parameter {key} does not match the expected value, got {metadata.get_parameter(key)} but expected {value}"
         )
+
+reader = podio.root_io.Reader("eventHeaderConcurrent.root")
+events = reader.get("events")
+expected_events_length = 10
+expected_run_number = 42
+expected_event_numbers = set(range(42, 42 + expected_events_length))
+seen_event_numbers = set()
+if len(events) != expected_events_length:
+    raise RuntimeError("Number of events does not match expected number")
+for frame in events:
+    event_header = frame.get("EventHeader")[0]
+    if (run_number := event_header.getRunNumber()) != expected_run_number:
+        raise RuntimeError(
+            f"Run number is not set correctly (expected {expected_run_number}, actual {run_number})"
+        )
+    event_number = event_header.getEventNumber()
+    if event_number not in expected_event_numbers:
+        raise RuntimeError(f"Event number {event_number} is not in expected numbers")
+    if event_number in seen_event_numbers:
+        raise RuntimeError(f"Event number {event_number} is duplicated")
+    seen_event_numbers.add(event_number)

test/k4FWCoreTest/options/createEventHeaderConcurrent.py

@@ -0,0 +1,59 @@
+#
+# Copyright (c) 2014-2024 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# This is an example creating EventHeader created in GaudiHive
+
+from Gaudi.Configuration import *
+
+from Configurables import EventHeaderCreator
+from Configurables import HiveSlimEventLoopMgr, HiveWhiteBoard, AvalancheSchedulerSvc
+from k4FWCore import ApplicationMgr, IOSvc
+
+evtslots = 6
+threads = 6
+
+whiteboard = HiveWhiteBoard(
+    "EventDataSvc",
+    EventSlots=evtslots,
+    ForceLeaves=True,
+)
+
+slimeventloopmgr = HiveSlimEventLoopMgr(
+    "HiveSlimEventLoopMgr", SchedulerName="AvalancheSchedulerSvc", OutputLevel=WARNING
+)
+
+scheduler = AvalancheSchedulerSvc(ThreadPoolSize=threads, ShowDataFlow=True, OutputLevel=WARNING)
+
+
+eventHeaderCreator = EventHeaderCreator(
+    "eventHeaderCreator", runNumber=42, eventNumberOffset=42, OutputLevel=DEBUG
+)
+
+svc = IOSvc("IOSvc")
+svc.output = "eventHeaderConcurrent.root"
+
+ApplicationMgr(
+    TopAlg=[eventHeaderCreator],
+    EvtSel="NONE",
+    EvtMax=10,
+    ExtSvc=[whiteboard],
+    EventLoop=slimeventloopmgr,
+    MessageSvcType="InertMessageSvc",
+    OutputLevel=INFO,
+)