PythonEventProcessor.cc

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// -*- C++ -*-
//
// Package:     Subsystem/Package
// Class  :     PythonEventProcessor
// 
// Implementation:
//     [Notes on implementation]
//
// Original Author:  root
//         Created:  Fri, 20 Jan 2017 16:36:41 GMT
//

// system include files
#include <mutex>

// user include files
#include "FWCore/PythonFramework/interface/PythonEventProcessor.h"
#include "FWCore/PythonParameterSet/interface/PythonProcessDesc.h"

#include "FWCore/Framework/interface/defaultCmsRunServices.h"
#include "FWCore/ParameterSet/interface/ProcessDesc.h"

#include "FWCore/ServiceRegistry/interface/ServiceRegistry.h"
#include "FWCore/ServiceRegistry/interface/ServiceToken.h"

#include "FWCore/MessageLogger/interface/JobReport.h"

#include "FWCore/PluginManager/interface/PluginManager.h"
#include "FWCore/PluginManager/interface/standard.h"

namespace {
   std::once_flag pluginFlag;
   int setupPluginSystem() {
      std::call_once(pluginFlag, []() {
         edmplugin::PluginManager::configure(edmplugin::standard::config());
         });
      return 0;
   }
  
  std::shared_ptr<edm::ProcessDesc> addDefaultServicesToProcessDesc(std::shared_ptr<edm::ProcessDesc> iDesc) {
    iDesc->addServices(edm::defaultCmsRunServices());
    return iDesc;
  }

  edm::ServiceToken createJobReport() {
    return edm::ServiceRegistry::createContaining(std::make_shared<edm::serviceregistry::ServiceWrapper<edm::JobReport>>(std::make_unique<edm::JobReport>(nullptr)));
  }
}

//
// constants, enums and typedefs
//

//
// static data member definitions
//

//
// constructors and destructor
//
PythonEventProcessor::PythonEventProcessor(PythonProcessDesc const& iDesc)
: forcePluginSetupFirst_(setupPluginSystem())
  ,processor_(addDefaultServicesToProcessDesc(iDesc.processDesc()),createJobReport(),edm::serviceregistry::kOverlapIsError)
{
}

PythonEventProcessor::~PythonEventProcessor()
{
   auto gil = PyEval_SaveThread();
   try {
      processor_.endJob();
   }catch(...) {

   }
   PyEval_RestoreThread(gil);
}

void
PythonEventProcessor::run()
{
   auto gil = PyEval_SaveThread();
   try {
      (void) processor_.runToCompletion();
   }catch(...) {

   }
   PyEval_RestoreThread(gil);
}