Add a Gaudi Algorithm filling EventHeader eventNumber and runNumber

k4FWCore/CMakeLists.txt

@@ -22,6 +22,7 @@ limitations under the License.
 ################################################################################
 
 find_package(podio 0.16.3 REQUIRED)
+find_package(EDM4HEP)
 
 gaudi_install(SCRIPTS)
 gaudi_install(PYTHON)
@@ -40,7 +41,7 @@ target_include_directories(k4FWCore PUBLIC
 file(GLOB k4fwcore_plugin_sources components/*.cpp)
 gaudi_add_module(k4FWCorePlugins
                  SOURCES ${k4fwcore_plugin_sources}
-                 LINK Gaudi::GaudiAlgLib Gaudi::GaudiKernel k4FWCore k4FWCore::k4Interface ROOT::Core ROOT::RIO ROOT::Tree)
+                 LINK Gaudi::GaudiAlgLib Gaudi::GaudiKernel k4FWCore k4FWCore::k4Interface ROOT::Core ROOT::RIO ROOT::Tree EDM4HEP::edm4hep)
 target_include_directories(k4FWCorePlugins PUBLIC
   $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>
   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)

k4FWCore/components/EventHeaderCreator.cpp

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2014-2023 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.
+ */
+#include "EventHeaderCreator.h"
+#include "edm4hep/EventHeaderCollection.h"
+
+DECLARE_COMPONENT(EventHeaderCreator)
+
+EventHeaderCreator::EventHeaderCreator(const std::string& name, ISvcLocator* svcLoc) : GaudiAlgorithm(name, svcLoc) {
+  declareProperty("EventHeaderCollection", m_headerCol,
+                  "Name of the EventHeaderCollection that will be stored in the output root file.");
+}
+
+StatusCode EventHeaderCreator::initialize() {
+  if (GaudiAlgorithm::initialize().isFailure())
+    return StatusCode::FAILURE;
+  return StatusCode::SUCCESS;
+}
+
+StatusCode EventHeaderCreator::execute() {
+  static int eventNumber = 0;
+  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);
+  return StatusCode::SUCCESS;
+}
+
+StatusCode EventHeaderCreator::finalize() {
+  if (GaudiAlgorithm::finalize().isFailure())
+    return StatusCode::FAILURE;
+  return StatusCode::SUCCESS;
+}

k4FWCore/components/EventHeaderCreator.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2014-2023 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.
+ */
+#ifndef K4FWCORE_EVENTHEADERCREATOR
+#define K4FWCORE_EVENTHEADERCREATOR
+
+#include "GaudiAlg/GaudiAlgorithm.h"
+#include "k4FWCore/DataHandle.h"
+
+/***
+ * Algortihm that creates an EventHeader collection and fills it with eventNumber and runNumber
+ */
+
+namespace edm4hep {
+  class EventHeaderCollection;
+}
+
+class EventHeaderCreator : public GaudiAlgorithm {
+public:
+  EventHeaderCreator(const std::string& name, ISvcLocator* svcLoc);
+
+  virtual StatusCode initialize();
+  virtual StatusCode execute();
+  virtual StatusCode finalize();
+
+private:
+  // Run number value (fixed for the entire job, to be set by the job submitter)
+  Gaudi::Property<int> m_runNumber{this, "runNumber", 1, "Run number value"};
+  // Event number offset, use it if you want two separated jobs with the same run number
+  Gaudi::Property<int> m_eventNumberOffset{
+      this, "eventNumberOffset", 0,
+      "Event number offset, eventNumber will be filled with 'event_index + eventNumberOffset'"};
+  // datahandle for the EventHeader
+  DataHandle<edm4hep::EventHeaderCollection> m_headerCol{"EventHeader", Gaudi::DataHandle::Writer, this};
+};
+
+#endif

test/k4FWCoreTest/CMakeLists.txt

@@ -159,6 +159,13 @@ add_test(NAME CreateLegacyExampleEventData
          COMMAND ${K4RUN} options/createLegacyExampleEventData.py)
 set_test_env(CreateLegacyExampleEventData)
 
+
+add_test(NAME TestEventHeaderFiller
+         WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
+         COMMAND ${K4RUN} options/createEventHeader.py)
+set_test_env(TestEventHeaderFiller)
+
+
 add_test(NAME Testk4runNoArguments
          WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
          COMMAND ${K4RUN})

test/k4FWCoreTest/options/createEventHeader.py

@@ -0,0 +1,43 @@
+#
+# Copyright (c) 2014-2023 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.
+#
+from Gaudi.Configuration import *
+
+from Configurables import EventHeaderCreator
+eventHeaderCreator = EventHeaderCreator("eventHeaderCreator",
+    runNumber = 42,
+    eventNumberOffset = 42,
+    OutputLevel=DEBUG)
+
+from Configurables import k4DataSvc
+podioevent  = k4DataSvc("EventDataSvc")
+
+from Configurables import PodioOutput
+out = PodioOutput("out")
+out.filename = "eventHeader.root"
+
+from Configurables import ApplicationMgr
+ApplicationMgr(
+    TopAlg = [
+              eventHeaderCreator,
+              out,
+              ],
+    EvtSel = 'NONE',
+    EvtMax   = 2,
+    ExtSvc = [podioevent],
+    StopOnSignal = True)