Page History
This section will guide you trough the steps necessary to perform simple analysis in a C++ analysis framework (psana). For more detailed description of psana consult Psana User Manual - Old.
User modules in psana are the instances of the C++ class which must inherit from a special base class psana::Module
. There are several methods in the base class which can be overriden in the subclass (event() must always be implemented):
void beginJob(Event& evt, Env& env)
void beginRun(Event& evt, Env& env)
void beginCalibCycle(Event& evt, Env& env)
void event(Event& evt, Env& env)
void endCalibCycle(Event& evt, Env& env)
void endRun(Event& evt, Env& env)
void endJob(Event& evt, Env& env)
To start with the doing analysis one should have user release setup first as explained in Packages and Releases. If you have not done it yet create a package for your analysis with some unique name:
...
Code Block | ||
---|---|---|
| ||
#ifndef MY_ANA_PKG_MY_ANA_MOD_H
#define MY_ANA_PKG_MY_ANA_MOD_H
#include "psana/Module.h"
namespace my_ana_pkg {
class my_ana_mod : public Module {
public:
my_ana_mod (const std::string& name) ;
virtual ~my_ana_mod () ;
virtual void event(Event& evt, Env& env);
};
}
#endif // MY_ANA_PKG_MY_ANA_MOD_H
|
Code Block | ||
---|---|---|
| ||
#include "my_ana_pkg/my_ana_mod.h" #include "MsgLogger/MsgLogger.h" #include "PSEvt/EventId.h" #include "psddl_psana/bld.ddl.h" // This declares this class as psana module using namespace my_ana_pkg; PSANA_MODULE_FACTORY(my_ana_mod) namespace my_ana_pkg { my_ana_mod::my_ana_mod (const std::string& name) : Module(name) { } my_ana_mod::~my_ana_mod () { } void my_ana_mod::event(Event& evt, Env& env) { // get event time PSTime::Time evtTime; boost::shared_ptr<PSEvt::EventId> eventId = evt.get(); if (eventId.get()) { evtTime = eventId->time(); } // get beam data boost::shared_ptr<Psana::Bld::BldDataEBeam> ebeam = evt.get(Source()); if (ebeam.get()) { MsgLog(name(), info, "time: " << evtTime << ", charge: " << ebeam->ebeamCharge() << ", energy: " << ebeam->ebeamL3Energy()); } } } |
...
Code Block | ||
---|---|---|
| ||
#ifndef MY_ANA_PKG_MY_ANA_MOD_H
#define MY_ANA_PKG_MY_ANA_MOD_H
#include "psana/Module.h"
namespace my_ana_pkg {
class my_ana_mod : public Module {
public:
my_ana_mod (const std::string& name) ;
virtual ~my_ana_mod () ;
virtual void event(Event& evt, Env& env);
virtual void endJob(Event& evt, Env& env);
private:
double m_threshold;
unsigned long m_count;
unsigned long m_total;
};
}
#endif // MY_ANA_PKG_MY_ANA_MOD_H
|
Code Block | ||
---|---|---|
| ||
#include "my_ana_pkg/my_ana_mod.h" #include "MsgLogger/MsgLogger.h" #include "psddl_psana/bld.ddl.h" // This declares this class as psana module using namespace my_ana_pkg; PSANA_MODULE_FACTORY(my_ana_mod) namespace my_ana_pkg { my_ana_mod::my_ana_mod (const std::string& name) : Module(name) , m_threshold(0.0) , m_count(0) , m_total(0) { m_threshold = config("threshold"); } my_ana_mod::~my_ana_mod () { } void my_ana_mod::event(Event& evt, Env& env) { // get beam data boost::shared_ptr<Psana::Bld::BldDataEBeam> ebeam = evt.get(Source()); if (ebeam.get()) { if (ebeam->ebeamL3Energy() > m_threshold) { ++ m_count; } ++ m_total; } } void my_ana_mod::endJob(Event& evt, Env& env) { MsgLog(name(), info, "Fraction of events with energy>" << m_threshold << " is " << m_count*100.0/m_total << "%"); } } |
...
Overview
Content Tools