// $Id$ // // File: DEventProcessor_p2k2pi_hists.cc // Created: Wed Mar 11 20:34:14 EDT 2015 // Creator: jrsteven (on Linux halldw1.jlab.org 2.6.32-504.8.1.el6.x86_64 x86_64) // #include "DEventProcessor_p2k2pi_hists.h" // Routine used to create our DEventProcessor extern "C" { void InitPlugin(JApplication *locApplication) { InitJANAPlugin(locApplication); locApplication->AddProcessor(new DEventProcessor_p2k2pi_hists()); //register this plugin locApplication->AddFactoryGenerator(new DFactoryGenerator_p2k2pi_hists()); //register the factory generator } } // "C" //------------------ // init //------------------ jerror_t DEventProcessor_p2k2pi_hists::init(void) { // This is called once at program startup. If you are creating // and filling historgrams in this plugin, you should lock the // ROOT mutex like this: // // japp->RootWriteLock(); // ... create historgrams or trees ... // japp->RootUnLock(); // return NOERROR; } //------------------ // brun //------------------ jerror_t DEventProcessor_p2k2pi_hists::brun(jana::JEventLoop* locEventLoop, int locRunNumber) { // This is called whenever the run number changes //const DEventWriterROOT* locEventWriterROOT = NULL; //locEventLoop->GetSingle(locEventWriterROOT); //locEventWriterROOT->Create_DataTrees(locEventLoop); return NOERROR; } //------------------ // evnt //------------------ jerror_t DEventProcessor_p2k2pi_hists::evnt(jana::JEventLoop* locEventLoop, uint64_t locEventNumber) { // This is called for every event. Use of common resources like writing // to a file or filling a histogram should be mutex protected. Using // locEventLoop->Get(...) to get reconstructed objects (and thereby activating the // reconstruction algorithm) should be done outside of any mutex lock // since multiple threads may call this method at the same time. // // Here's an example: // // vector mydataclasses; // locEventLoop->Get(mydataclasses); // // japp->RootWriteLock(); // ... fill historgrams or trees ... // japp->RootUnLock(); // DOCUMENTATION: // ANALYSIS library: https://halldweb1.jlab.org/wiki/index.php/GlueX_Analysis_Software // Get the analysis results for all DReactions. //Getting these objects triggers the analysis, if it wasn't performed already. //These objects contain the DParticleCombo objects that survived the DAnalysisAction cuts that were added to the DReactions //vector locAnalysisResultsVector; //locEventLoop->Get(locAnalysisResultsVector); //Recommended: Write surviving particle combinations (if any) to output ROOT TTree //If no cuts are performed by the analysis actions added to a DReaction, then this saves all of its particle combinations. //The event writer gets the DAnalysisResults objects from JANA, performing the analysis. // string is DReaction factory tag: will fill trees for all DReactions that are defined in the specified factory const DEventWriterROOT* locEventWriterROOT = NULL; locEventLoop->GetSingle(locEventWriterROOT); locEventWriterROOT->Fill_DataTrees(locEventLoop, "p2k2pi_hists"); return NOERROR; } //------------------ // erun //------------------ jerror_t DEventProcessor_p2k2pi_hists::erun(void) { // This is called whenever the run number changes, before it is // changed to give you a chance to clean up before processing // events from the next run number. return NOERROR; } //------------------ // fini //------------------ jerror_t DEventProcessor_p2k2pi_hists::fini(void) { // Called before program exit after event processing is finished. return NOERROR; }