#include <Example/ExternalLHEProducer/src/ExternalLHEProducer.cc>

Inheritance diagram for ExternalLHEProducer:

Classes
class	FileCloseSentry

Public Member Functions
	ExternalLHEProducer (const edm::ParameterSet &iConfig)

Public Member Functions inherited from edm::one::EDProducer< edm::BeginRunProducer, edm::EndRunProducer >
	EDProducer ()=default

SerialTaskQueue *	globalLuminosityBlocksQueue () final

SerialTaskQueue *	globalRunsQueue () final

bool	hasAbilityToProduceInLumis () const final

bool	hasAbilityToProduceInRuns () const final

bool	wantsGlobalLuminosityBlocks () const final

bool	wantsGlobalRuns () const final

Public Member Functions inherited from edm::one::EDProducerBase
	EDProducerBase ()

ModuleDescription const &	moduleDescription () const

bool	wantsStreamLuminosityBlocks () const

bool	wantsStreamRuns () const

	~EDProducerBase () override

Public Member Functions inherited from edm::ProducerBase
void	callWhenNewProductsRegistered (std::function< void(BranchDescription const &)> const &func)

std::vector< edm::ProductResolverIndex > const &	indiciesForPutProducts (BranchType iBranchType) const

	ProducerBase ()

std::vector< edm::ProductResolverIndex > const &	putTokenIndexToProductResolverIndex () const

void	registerProducts (ProducerBase , ProductRegistry , ModuleDescription const &)

std::function< void(BranchDescription const &)>	registrationCallback () const
	used by the fwk to register list of products More...

void	resolvePutIndicies (BranchType iBranchType, ModuleToResolverIndicies const &iIndicies, std::string const &moduleLabel)

	~ProducerBase () noexcept(false) override

Public Member Functions inherited from edm::EDConsumerBase
std::vector< ConsumesInfo >	consumesInfo () const

void	convertCurrentProcessAlias (std::string const &processName)
	Convert "@currentProcess" in InputTag process names to the actual current process name. More...

	EDConsumerBase ()

	EDConsumerBase (EDConsumerBase const &)=delete

	EDConsumerBase (EDConsumerBase &&)=default

ESProxyIndex const *	esGetTokenIndices (edm::Transition iTrans) const

ProductResolverIndexAndSkipBit	indexFrom (EDGetToken, BranchType, TypeID const &) const

void	itemsMayGet (BranchType, std::vector< ProductResolverIndexAndSkipBit > &) const

void	itemsToGet (BranchType, std::vector< ProductResolverIndexAndSkipBit > &) const

std::vector< ProductResolverIndexAndSkipBit > const &	itemsToGetFrom (BranchType iType) const

void	labelsForToken (EDGetToken iToken, Labels &oLabels) const

void	modulesWhoseProductsAreConsumed (std::vector< ModuleDescription const * > &modules, ProductRegistry const &preg, std::map< std::string, ModuleDescription const * > const &labelsToDesc, std::string const &processName) const

EDConsumerBase const &	operator= (EDConsumerBase const &)=delete

EDConsumerBase &	operator= (EDConsumerBase &&)=default

bool	registeredToConsume (ProductResolverIndex, bool, BranchType) const

bool	registeredToConsumeMany (TypeID const &, BranchType) const

ProductResolverIndexAndSkipBit	uncheckedIndexFrom (EDGetToken) const

void	updateLookup (BranchType iBranchType, ProductResolverIndexHelper const &, bool iPrefetchMayGet)

void	updateLookup (eventsetup::ESRecordsToProxyIndices const &)

virtual	~EDConsumerBase () noexcept(false)

Static Public Member Functions
static void	fillDescriptions (edm::ConfigurationDescriptions &descriptions)

Static Public Member Functions inherited from edm::one::EDProducerBase
static const std::string &	baseType ()

static void	fillDescriptions (ConfigurationDescriptions &descriptions)

static void	prevalidate (ConfigurationDescriptions &descriptions)

Private Member Functions
void	beginRunProduce (edm::Run &run, edm::EventSetup const &es) override

int	closeDescriptors (int preserve) const

void	endRunProduce (edm::Run &, edm::EventSetup const &) override

void	executeScript (std::vector< std::string > const &args, int id, bool isPost) const

std::vector< std::string >	makeArgs (uint32_t nEvents, unsigned int nThreads, std::uint32_t seed) const

void	nextEvent ()

void	preallocThreads (unsigned int) override

void	produce (edm::Event &, const edm::EventSetup &) override

Private Attributes
const std::vector< std::string >	args_

bool	generateConcurrently_ {false}

uint32_t	nEvents_

uint32_t	npars_

std::map< unsigned, std::pair< unsigned, unsigned > >	nPartonMapping_ {}

unsigned int	nThreads_ {1}

std::string	outputContents_

std::string	outputFile_

std::shared_ptr< lhef::LHEEvent >	partonLevel_

const std::vector< std::string >	postGenerationCommand_

std::unique_ptr< lhef::LHEReader >	reader_

std::shared_ptr< lhef::LHERunInfo >	runInfo_

std::shared_ptr< lhef::LHERunInfo >	runInfoLast_

boost::ptr_deque< LHERunInfoProduct >	runInfoProducts_

std::string	scriptName_

bool	storeXML_

bool	wasMerged

Additional Inherited Members
Public Types inherited from edm::one::EDProducerBase
typedef EDProducerBase	ModuleType

Public Types inherited from edm::ProducerBase
using	ModuleToResolverIndicies = std::unordered_multimap< std::string, std::tuple< edm::TypeID const , const char , edm::ProductResolverIndex >>

typedef ProductRegistryHelper::TypeLabelList	TypeLabelList

Public Types inherited from edm::EDConsumerBase
typedef ProductLabels	Labels

Protected Member Functions inherited from edm::EDConsumerBase
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	consumes (edm::InputTag const &tag)

EDGetToken	consumes (const TypeToGet &id, edm::InputTag const &tag)

template<BranchType B>
EDGetToken	consumes (TypeToGet const &id, edm::InputTag const &tag)

ConsumesCollector	consumesCollector ()
	Use a ConsumesCollector to gather consumes information from helper functions. More...

template<typename ProductType , BranchType B = InEvent>
void	consumesMany ()

void	consumesMany (const TypeToGet &id)

template<BranchType B>
void	consumesMany (const TypeToGet &id)

template<typename ESProduct , typename ESRecord , Transition Tr = Transition::Event>
auto	esConsumes ()

template<typename ESProduct , typename ESRecord , Transition Tr = Transition::Event>
auto	esConsumes (ESInputTag const &tag)

template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	mayConsume (edm::InputTag const &tag)

EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)

template<BranchType B>
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)

Detailed Description

Description: [one line class summary]

Implementation: [Notes on implementation]

Definition at line 73 of file ExternalLHEProducer.cc.

Constructor & Destructor Documentation

ExternalLHEProducer::ExternalLHEProducer ( const edm::ParameterSet & iConfig )

explicit

Definition at line 131 of file ExternalLHEProducer.cc.

References args_, looper::cfg, Exception, edm::ParameterSet::exists(), edm::ParameterSet::getParameterSetVector(), np, npars_, nPartonMapping_, and AlCaHLTBitMon_QueryRunRegistry::string.

                                                                        :
   scriptName_((iConfig.getParameter<edm::FileInPath>("scriptName")).fullPath()),
   outputFile_(iConfig.getParameter<std::string>("outputFile")),
   args_(iConfig.getParameter<std::vector<std::string> >("args")),
   npars_(iConfig.getParameter<uint32_t>("numberOfParameters")),
   nEvents_(iConfig.getUntrackedParameter<uint32_t>("nEvents")),
   storeXML_(iConfig.getUntrackedParameter<bool>("storeXML")),
   generateConcurrently_(iConfig.getUntrackedParameter<bool>("generateConcurrently")),
   postGenerationCommand_(iConfig.getUntrackedParameter<std::vector<std::string>>("postGenerationCommand"))
 {
   if (npars_ != args_.size())
     throw cms::Exception("ExternalLHEProducer") << "Problem with configuration: " << args_.size() << " script arguments given, expected " << npars_;
 
   if (iConfig.exists("nPartonMapping")) {
     auto& processMap(iConfig.getParameterSetVector("nPartonMapping"));
     for (auto& cfg : processMap) {
       unsigned processId(cfg.getParameter<unsigned>("idprup"));
 
       auto orderStr(cfg.getParameter<std::string>("order"));
       unsigned order(0);
       if (orderStr == "LO")
         order = 0;
       else if (orderStr == "NLO")
         order = 1;
       else
         throw cms::Exception("ExternalLHEProducer") << "Invalid order specification for process " << processId << ": " << orderStr;
       
       unsigned np(cfg.getParameter<unsigned>("np"));
       
       nPartonMapping_.emplace(processId, std::make_pair(order, np));
     }
   }
 
   produces<LHEXMLStringProduct, edm::Transition::BeginRun>("LHEScriptOutput"); 
 
   produces<LHEEventProduct>();
   produces<LHERunInfoProduct, edm::Transition::BeginRun>();
   produces<LHERunInfoProduct, edm::Transition::EndRun>();
 }

Member Function Documentation

void ExternalLHEProducer::beginRunProduce	(	edm::Run &	run,
		edm::EventSetup const &	es
	)

overrideprivate

Definition at line 275 of file ExternalLHEProducer.cc.

References LHERunInfoProduct::addComment(), LHERunInfoProduct::addHeader(), pyrootRender::destroy(), MillePedeFileConverter_cfg::e, Exception, executeScript(), FrontierConditions_GlobalTag_cff::file, edm::FileInPath::fullPath(), generateConcurrently_, edm::Service< T >::isAvailable(), edm::make_functor_task(), makeArgs(), eostools::move(), edm::RandomNumberGenerator::mySeed(), nEvents, nEvents_, nextEvent(), nThreads_, MillePedeFileConverter_cfg::out, outputFile_, AlCaHLTBitMon_ParallelJobs::p, callgraph::path, postGenerationCommand_, edm::Run::put(), reader_, runInfo_, runInfoLast_, runInfoProducts_, alignCSCRings::s, SurveyInfoScenario_cff::seed, createPayload::skip, storeXML_, AlCaHLTBitMon_QueryRunRegistry::string, protons_cff::t, TrackValidation_cff::task, and wasMerged.

 {
 
   // pass the number of events as previous to last argument
   
   // pass the random number generator seed as last argument
 
   edm::Service<edm::RandomNumberGenerator> rng;
 
   if ( ! rng.isAvailable()) {
     throw cms::Exception("Configuration")
       << "The ExternalLHEProducer module requires the RandomNumberGeneratorService\n"
       "which is not present in the configuration file.  You must add the service\n"
       "in the configuration file if you want to run ExternalLHEProducer";
   }
 
   std::vector<std::string> infiles;
   auto const seed = rng->mySeed();
   if (generateConcurrently_) {
     infiles.resize(nThreads_);
     auto const nEventsAve = nEvents_ / nThreads_;
     unsigned int const overflow = nThreads_ - (nEvents_ % nThreads_);
     std::exception_ptr except;
     std::atomic<char> exceptSet{0};
 
     tbb::this_task_arena::isolate([this, &except, &infiles, &exceptSet, nEventsAve, overflow, seed]() {
       tbb::empty_task* waitTask = new (tbb::task::allocate_root()) tbb::empty_task;
       waitTask->set_ref_count(1 + nThreads_);
 
       for (unsigned int t = 0; t < nThreads_; ++t) {
         uint32_t nEvents = nEventsAve;
         if (nEvents_ % nThreads_ != 0 and t >= overflow) {
           nEvents += 1;
         }
         auto task = edm::make_functor_task(tbb::task::allocate_root(),
                                            [t, this, &infiles, seed, nEvents, &except, &exceptSet, waitTask]() {
                                              try {
                                                using namespace boost::filesystem;
                                                using namespace std::string_literals;
                                                auto out = path("thread"s + std::to_string(t)) / path(outputFile_);
                                                infiles[t] = out.native();
                                                executeScript(makeArgs(nEvents, 1, seed + t), t, false);
                                              } catch (...) {
                                                char expected = 0;
                                                if (exceptSet.compare_exchange_strong(expected, 1)) {
                                                  except = std::current_exception();
                                                  exceptSet.store(2);
                                                }
                                              }
                                              waitTask->decrement_ref_count();
                                            });
         tbb::task::spawn(*task);
       }
       waitTask->wait_for_all();
       tbb::task::destroy(*waitTask);
     });
     if (exceptSet != 0) {
       std::rethrow_exception(except);
     }
   } else {
     infiles = std::vector<std::string>(1, outputFile_);
     executeScript(makeArgs(nEvents_, nThreads_, seed), 0, false);
   }
 
   //run post-generation command if specified
   if (!postGenerationCommand_.empty()) {
     std::vector<std::string> postcmd = postGenerationCommand_;
     try {
       postcmd[0] = edm::FileInPath(postcmd[0]).fullPath();
     } catch (const edm::Exception& e) {
       edm::LogWarning("ExternalLHEProducer") << postcmd[0] << " is not a relative path. Run it as a shell command.";
     }
     executeScript(postcmd, 0, true);
   }
 
   //fill LHEXMLProduct (streaming read directly into compressed buffer to save memory)
   std::unique_ptr<LHEXMLStringProduct> p(new LHEXMLStringProduct);
 
   //store the XML file only if explictly requested
   if (storeXML_) {
     std::string file;
     if (generateConcurrently_) {
       using namespace boost::filesystem;
       file = (path("thread0") / path(outputFile_)).native();
     } else {
       file = outputFile_;
     }
     std::ifstream instream(file);
     if (!instream) {
       throw cms::Exception("OutputOpenError") << "Unable to open script output file " << outputFile_ << ".";
     }  
     instream.seekg (0, instream.end);
     int insize = instream.tellg();
     instream.seekg (0, instream.beg);  
     p->fillCompressedContent(instream, 0.25*insize);
     instream.close();
   }
   run.put(std::move(p), "LHEScriptOutput");
 
   // LHE C++ classes translation
   // (read back uncompressed file from disk in streaming mode again to save memory)
 
   unsigned int skip = 0;
   reader_ = std::make_unique<lhef::LHEReader>(infiles, skip);
 
   nextEvent();
   if (runInfoLast_) {
     runInfo_ = runInfoLast_;
   
     std::unique_ptr<LHERunInfoProduct> product(new LHERunInfoProduct(*runInfo_->getHEPRUP()));
     std::for_each(runInfo_->getHeaders().begin(),
                   runInfo_->getHeaders().end(),
                   boost::bind(&LHERunInfoProduct::addHeader,
                               product.get(), _1));
     std::for_each(runInfo_->getComments().begin(),
                   runInfo_->getComments().end(),
                   boost::bind(&LHERunInfoProduct::addComment,
                               product.get(), _1));
   
     // keep a copy around in case of merging
     runInfoProducts_.push_back(new LHERunInfoProduct(*product));
     wasMerged = false;
   
     run.put(std::move(product));
   
     runInfo_.reset();
   }
 
 }

int ExternalLHEProducer::closeDescriptors ( int preserve ) const

private

Definition at line 471 of file ExternalLHEProducer.cc.

References dir.

Referenced by executeScript().

 {
   int maxfd = 1024;
   int fd;
 #ifdef __linux__
   DIR * dir;
   struct dirent *dp;
   maxfd = preserve;
   if ((dir = opendir("/proc/self/fd"))) {
     errno = 0;
     while ((dp = readdir (dir)) != nullptr) {
       if ((strcmp(dp->d_name, ".") == 0)  || (strcmp(dp->d_name, "..") == 0)) {
         continue;
       }
       if (sscanf(dp->d_name, "%d", &fd) != 1) {
         //throw cms::Exception("closeDescriptors") << "Found unexpected filename in /proc/self/fd: " << dp->d_name;
         return -1;
       }
       if (fd > maxfd) {
         maxfd = fd;
       }
     }
     if (errno) {
       //throw cms::Exception("closeDescriptors") << "Unable to determine the number of fd (errno=" << errno << ", " << strerror(errno) << ").";
       return errno;
     }
     closedir(dir);
   }
 #endif
   // TODO: assert for an unreasonable number of fds?
   for (fd=3; fd<maxfd+1; fd++) {
     if (fd != preserve)
       close(fd);
   }
   return 0;
 }

void ExternalLHEProducer::endRunProduce	(	edm::Run &	run,
		edm::EventSetup const &	es
	)

overrideprivate

Definition at line 407 of file ExternalLHEProducer.cc.

References edm::errors::EventGenerationFailure, Exception, generateConcurrently_, eostools::move(), nextEvent(), nThreads_, MillePedeFileConverter_cfg::out, outputFile_, partonLevel_, callgraph::path, edm::Run::put(), reader_, runInfoProducts_, alignCSCRings::s, and protons_cff::t.

 {
 
   if (!runInfoProducts_.empty()) {
     std::unique_ptr<LHERunInfoProduct> product(runInfoProducts_.pop_front().release());
     run.put(std::move(product));
   }
   
   nextEvent();
   if (partonLevel_) {
     // VALIDATION_RUN env variable allows to finish event processing early without errors by sending SIGINT
     if (std::getenv("VALIDATION_RUN") != nullptr) {
       edm::LogWarning("ExternalLHEProducer")
           << "Event loop is over, but there are still lhe events to process, ignoring...";
     } else {
       throw edm::Exception(edm::errors::EventGenerationFailure)
           << "Error in ExternalLHEProducer::endRunProduce().  "
           << "Event loop is over, but there are still lhe events to process."
           << "This could happen if lhe file contains more events than requested.  This is never expected to happen.";
     }
   }  
   
   reader_.reset();  
   if (generateConcurrently_) {
     for (unsigned int t = 0; t < nThreads_; ++t) {
       using namespace boost::filesystem;
       using namespace std::string_literals;
       auto out = path("thread"s + std::to_string(t)) / path(outputFile_);
       if (unlink(out.c_str())) {
         throw cms::Exception("OutputDeleteError") << "Unable to delete original script output file " << out
                                                   << " (errno=" << errno << ", " << strerror(errno) << ").";
       }
     }
   } else {
     if (unlink(outputFile_.c_str())) {
       throw cms::Exception("OutputDeleteError") << "Unable to delete original script output file " << outputFile_
                                                 << " (errno=" << errno << ", " << strerror(errno) << ").";
     }
   }
 }

void ExternalLHEProducer::executeScript	(	std::vector< std::string > const &	args,
		int	id,
		bool	isPost
	)		const

private

Definition at line 510 of file ExternalLHEProducer.cc.

References dir2webdir::argc, cmsBatch::argv, closeDescriptors(), RecoEcal_EventContent_cff::ec, Exception, generateConcurrently_, mps_fire::i, NULL, callgraph::path, sysUtil::pid, pipe::pipe(), alignCSCRings::s, scriptName_, mps_update::status, and TriggerAnalyzer::write().

Referenced by beginRunProduce().

 {
 
   // Fork a script, wait until it finishes.
 
   int rc = 0, rc2 = 0;
   int filedes[2], fd_flags;
 
   if (pipe(filedes)) {
     throw cms::Exception("Unable to create a new pipe");
   }
   FileCloseSentry sentry1(filedes[0]), sentry2(filedes[1]);
 
   if ((fd_flags = fcntl(filedes[1], F_GETFD, NULL)) == -1) {
     throw cms::Exception("ExternalLHEProducer") << "Failed to get pipe file descriptor flags (errno=" << rc << ", " << strerror(rc) << ")";
   }
   if (fcntl(filedes[1], F_SETFD, fd_flags | FD_CLOEXEC) == -1) {
     throw cms::Exception("ExternalLHEProducer") << "Failed to set pipe file descriptor flags (errno=" << rc << ", " << strerror(rc) << ")";
   }
 
   unsigned int argc_pre = 0;
   // For generation command the first argument gives to the scriptName
   if (!isPost) {
     argc_pre = 1;
   }
   unsigned int argc = argc_pre + args.size();
   // TODO: assert that we have a reasonable number of arguments
   char **argv = new char *[argc+1];
   if (!isPost) {
     argv[0] = strdup(scriptName_.c_str());
   }
   for (unsigned int i = 0; i < args.size(); i++) {
     argv[argc_pre + i] = strdup(args[i].c_str());
   }
   argv[argc] = nullptr;
 
   pid_t pid = fork();
   if (pid == 0) {
     // The child process
     if (!(rc = closeDescriptors(filedes[1]))) {
       if (!isPost && generateConcurrently_) {
         using namespace boost::filesystem;
         using namespace std::string_literals;
         boost::system::error_code ec;
         auto newDir = path("thread"s + std::to_string(id));
         create_directory(newDir, ec);
         current_path(newDir, ec);
       }
       execvp(argv[0], argv); // If execv returns, we have an error.
       rc = errno;
     }
     while ((write(filedes[1], &rc, sizeof(int)) == -1) && (errno == EINTR)) {}
     _exit(1);
   }
 
   // Free the arg vector ASAP
   for (unsigned int i=0; i<args.size()+1; i++) {
     free(argv[i]);
   }
   delete [] argv;
 
   if (pid == -1) {
     throw cms::Exception("ForkException") << "Unable to fork a child (errno=" << errno << ", " << strerror(errno) << ")";
   }
 
   close(filedes[1]);
   // If the exec succeeds, the read will fail.
   while (((rc2 = read(filedes[0], &rc, sizeof(int))) == -1) && (errno == EINTR)) { rc2 = 0; }
   if ((rc2 == sizeof(int)) && rc) {
     throw cms::Exception("ExternalLHEProducer") << "Failed to execute script (errno=" << rc << ", " << strerror(rc) << ")";
   }
   close(filedes[0]);
 
   int status = 0;
   errno = 0;
   do {
     if (waitpid(pid, &status, 0) < 0) {
       if (errno == EINTR) {
         continue;
       } else {
         throw cms::Exception("ExternalLHEProducer") << "Failed to read child status (errno=" << errno << ", " << strerror(errno) << ")";
       }
     }
     if (WIFSIGNALED(status)) {
       throw cms::Exception("ExternalLHEProducer") << "Child exited due to signal " << WTERMSIG(status) << ".";
     }
     if (WIFEXITED(status)) {
       rc = WEXITSTATUS(status);
       break;
     }
   } while (true);
   if (rc) {
     throw cms::Exception("ExternalLHEProducer") << "Child failed with exit code " << rc << ".";
   }
 
 }

void ExternalLHEProducer::fillDescriptions ( edm::ConfigurationDescriptions & descriptions )

static

Definition at line 609 of file ExternalLHEProducer.cc.

References edm::ParameterSetDescription::add(), edm::ConfigurationDescriptions::addDefault(), edm::ParameterSetDescription::addUntracked(), edm::ParameterSetDescription::addVPSetOptional(), edm::ParameterSetDescription::setComment(), edm::ParameterDescriptionNode::setComment(), and AlCaHLTBitMon_QueryRunRegistry::string.

                                                                                 {
   //The following says we do not know what parameters are allowed so do no validation
   // Please change this to state exactly what you do use, even if it is no parameters
   edm::ParameterSetDescription desc;
   desc.setComment("Executes an external script and places its output file into an EDM collection");
 
   edm::FileInPath thePath;
   desc.add<edm::FileInPath>("scriptName", thePath);
   desc.add<std::string>("outputFile", "myoutput");
   desc.add<std::vector<std::string> >("args");
   desc.add<uint32_t>("numberOfParameters");
   desc.addUntracked<uint32_t>("nEvents");
   desc.addUntracked<bool>("storeXML", false);
   desc.addUntracked<bool>("generateConcurrently", false)
       ->setComment("If true, run the script concurrently in separate processes.");
   desc.addUntracked<std::vector<std::string>>("postGenerationCommand", std::vector<std::string>())
       ->setComment(
           "Command to run after the generation script has completed. The first argument can be a relative path.");
 
   edm::ParameterSetDescription nPartonMappingDesc;
   nPartonMappingDesc.add<unsigned>("idprup");
   nPartonMappingDesc.add<std::string>("order");
   nPartonMappingDesc.add<unsigned>("np");
   desc.addVPSetOptional("nPartonMapping", nPartonMappingDesc);
 
   descriptions.addDefault(desc);
 }

std::vector< std::string > ExternalLHEProducer::makeArgs	(	uint32_t	nEvents,
		unsigned int	nThreads,
		std::uint32_t	seed
	)		const

private

Definition at line 448 of file ExternalLHEProducer.cc.

References writedatasetfile::args, args_, popcon2dropbox::copy(), and LogDebug.

Referenced by beginRunProduce().

                                                                                {
   std::vector<std::string> args;
   args.reserve(3 + args_.size());
 
   args.push_back(args_.front());
   args.push_back(std::to_string(nEvents));
 
   args.push_back(std::to_string(seed));
 
   args.push_back(std::to_string(nThreads));
   std::copy(args_.begin() + 1, args_.end(), std::back_inserter(args));
 
   for (unsigned int iArg = 0; iArg < args.size(); iArg++) {
     LogDebug("LHEInputArgs") << "arg [" << iArg << "] = " << args[iArg];
   }
 
   return args;
 }

void ExternalLHEProducer::nextEvent ( )

private

Definition at line 637 of file ExternalLHEProducer.cc.

References DEFINE_FWK_MODULE, partonLevel_, reader_, runInfo_, and runInfoLast_.

Referenced by beginRunProduce(), endRunProduce(), and produce().

 {
 
   if (partonLevel_)
     return;
 
   if(not reader_) { return;}
 
   partonLevel_ = reader_->next();
   if (!partonLevel_) {
     //see if we have another file to read;
     bool newFileOpened;
     do {
       newFileOpened = false;
       partonLevel_ = reader_->next(&newFileOpened);
     } while (newFileOpened && !partonLevel_);
   }
   if (!partonLevel_)
     return;
 
   std::shared_ptr<lhef::LHERunInfo> runInfoThis = partonLevel_->getRunInfo();
   if (runInfoThis != runInfoLast_) {
     runInfo_ = runInfoThis;
     runInfoLast_ = runInfoThis;
   }
 }

void ExternalLHEProducer::preallocThreads ( unsigned int iThreads )

overrideprivatevirtual

Reimplemented from edm::one::EDProducerBase.

Definition at line 178 of file ExternalLHEProducer.cc.

References nThreads_.

 {
   nThreads_ = iThreads;
 }

void ExternalLHEProducer::produce	(	edm::Event &	iEvent,
		const edm::EventSetup &	iSetup
	)

overrideprivate

Definition at line 185 of file ExternalLHEProducer.cc.

References LHEEventProduct::addComment(), LHERunInfoProduct::addComment(), LHERunInfoProduct::addHeader(), LHEEventProduct::addWeight(), edm::errors::EventGenerationFailure, Exception, eostools::move(), nextEvent(), np, nPartonMapping_, partonLevel_, edm::Event::put(), runInfo_, runInfoProducts_, and wasMerged.

 {
   nextEvent();
   if (!partonLevel_) {
     throw edm::Exception(edm::errors::EventGenerationFailure) << "No lhe event found in ExternalLHEProducer::produce().  "
     << "The likely cause is that the lhe file contains fewer events than were requested, which is possible "
     << "in case of phase space integration or unweighting efficiency problems.";
   }
 
   std::unique_ptr<LHEEventProduct> product(
            new LHEEventProduct(*partonLevel_->getHEPEUP(),
                    partonLevel_->originalXWGTUP())
            );
   if (partonLevel_->getPDF()) {
     product->setPDF(*partonLevel_->getPDF());
   }
   std::for_each(partonLevel_->weights().begin(),
                 partonLevel_->weights().end(),
                 boost::bind(&LHEEventProduct::addWeight,
                             product.get(), _1));
   product->setScales(partonLevel_->scales());
   product->setEvtNum(partonLevel_->evtnum());
   if (nPartonMapping_.empty()) {
     product->setNpLO(partonLevel_->npLO());
     product->setNpNLO(partonLevel_->npNLO());
   }
   else {
     // overwrite npLO and npNLO values by user-specified mapping
     unsigned processId(partonLevel_->getHEPEUP()->IDPRUP);
     unsigned order(0);
     unsigned np(0);
     try {
       auto procDef(nPartonMapping_.at(processId));
       order = procDef.first;
       np = procDef.second;
     }
     catch (std::out_of_range&) {
       throw cms::Exception("ExternalLHEProducer") << "Unexpected IDPRUP encountered: " << partonLevel_->getHEPEUP()->IDPRUP;
     }
 
     switch (order) {
     case 0:
       product->setNpLO(np);
       product->setNpNLO(-1);
       break;
     case 1:
       product->setNpLO(-1);
       product->setNpNLO(np);
       break;
     default:
       break;
     }
   }
 
   std::for_each(partonLevel_->getComments().begin(),
                 partonLevel_->getComments().end(),
                 boost::bind(&LHEEventProduct::addComment,
                             product.get(), _1));
 
   iEvent.put(std::move(product));
 
   if (runInfo_) {
     std::unique_ptr<LHERunInfoProduct> product(new LHERunInfoProduct(*runInfo_->getHEPRUP()));
     std::for_each(runInfo_->getHeaders().begin(),
                   runInfo_->getHeaders().end(),
                   boost::bind(&LHERunInfoProduct::addHeader,
                               product.get(), _1));
     std::for_each(runInfo_->getComments().begin(),
                   runInfo_->getComments().end(),
                   boost::bind(&LHERunInfoProduct::addComment,
                               product.get(), _1));
   
     if (!runInfoProducts_.empty()) {
       runInfoProducts_.front().mergeProduct(*product);
       if (!wasMerged) {
         runInfoProducts_.pop_front();
         runInfoProducts_.push_front(product.release());
         wasMerged = true;
       }
     }
   
     runInfo_.reset();
   }
   
   partonLevel_.reset();
   return; 
 }