PythonService Class Reference

#include <FWCore/Python/src/PythonService.h>

Public Member Functions
void	postBeginJob ()
void	postEndJob ()
void	postProcessEvent (const edm::Event &, const edm::EventSetup &)
void	preProcessEvent (const edm::EventID &, const edm::Timestamp &)
	PythonService (const edm::ParameterSet &, edm::ActivityRegistry &)
	~PythonService ()

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

Private Attributes
std::string	command_
std::string	fileName_
PythonManagerHandle	handle_
boost::python::object	service_

Detailed Description

Description: interface to write EDMService in Python

Usage: <usage>

Definition at line 32 of file PythonService.h.

Constructor & Destructor Documentation

PythonService::PythonService	(	const edm::ParameterSet &	iConfig,
		edm::ActivityRegistry &	iRegistry
	)

Definition at line 24 of file PythonService.cc.

References command_, gather_cfg::cout, edm::hlt::Exception, convertXMLtoSQLite_cfg::fileName, edm::ParameterSet::getParameter(), postBeginJob(), postEndJob(), postProcessEvent(), query::result, service_, edm::ActivityRegistry::watchPostBeginJob(), edm::ActivityRegistry::watchPostEndJob(), and edm::ActivityRegistry::watchPostProcessEvent().

                                                                                          :
    handle_(PythonManager::handle())
{
    
    std::cout << "Start preparing PythonService" << std::endl;
    const std::string fileName = iConfig.getParameter<std::string>("fileName");
    
    using namespace boost::python;
    
    command_ = "from "+fileName + " import *\n";
    object main_module(( boost::python::handle<>(borrowed(PyImport_AddModule(const_cast<char *>("__main__"))))));
    object main_namespace = main_module.attr("__dict__");
    try {
      object result((boost::python::handle<>(PyRun_String(command_.c_str(),
                                           Py_file_input,
                                           main_namespace.ptr(),
                                           main_namespace.ptr()))));
      service_ = main_namespace["service"];
    } catch( ... ) {
      throw cms::Exception("Configuration") <<"No 'service' python variable defined in given fileName parameter.\n Please create an instance of the python class you want to use and pass that instance to the variable named 'service'.";
    }
    
    // connect methods and signals
    // later on here will be a check what python methods are present
    // for now we expect postBeginJob, postEndJob and postProcessEvent
    
    iRegistry.watchPostBeginJob(this,&PythonService::postBeginJob);
    iRegistry.watchPostEndJob(this,&PythonService::postEndJob);
    iRegistry.watchPostProcessEvent(this,&PythonService::postProcessEvent);
}

PythonService::~PythonService

(

)

Definition at line 58 of file PythonService.cc.

{
}

Member Function Documentation

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

static

Definition at line 126 of file PythonService.cc.

References edm::ParameterSetDescription::add(), and edm::ConfigurationDescriptions::addDefault().

                                                                                {
    edm::ParameterSetDescription desc;
    desc.add<std::string>("fileName");
    descriptions.addDefault(desc);
}

void PythonService::postBeginJob

(

)

Definition at line 66 of file PythonService.cc.

References pythonToCppException(), query::result, and service_.

Referenced by PythonService().

{
    using namespace boost::python;
    object main_module((boost::python::handle<>(borrowed(PyImport_AddModule(const_cast<char *>("__main__"))))));   
    object main_namespace = main_module.attr("__dict__");
    main_namespace["tempService"] = service_;

    try {
      object result((boost::python::handle<>(PyRun_String("tempService.postBeginJob()",
                       Py_eval_input,
                       main_namespace.ptr(),
                       main_namespace.ptr()))));      
    }catch( error_already_set ) {
      pythonToCppException("RuntimeError");
    }
}

void PythonService::postEndJob

(

)

Definition at line 84 of file PythonService.cc.

References pythonToCppException(), query::result, and service_.

Referenced by PythonService().

{
    using namespace boost::python;
    object main_module((boost::python::handle<>(borrowed(PyImport_AddModule(const_cast<char *>("__main__"))))));   
    object main_namespace = main_module.attr("__dict__");
    main_namespace["tempService"] = service_;

    try {
       object result((boost::python::handle<>(PyRun_String("tempService.postEndJob()",
                       Py_eval_input,
                       main_namespace.ptr(),
                       main_namespace.ptr()))));      
    }catch( error_already_set ) {
       pythonToCppException("RuntimeError");
    }
}

void PythonService::postProcessEvent	(	const edm::Event &	,
		const edm::EventSetup &
	)

Definition at line 108 of file PythonService.cc.

References pythonToCppException(), query::result, and service_.

Referenced by PythonService().

{
    using namespace boost::python;
    object main_module((boost::python::handle<>(borrowed(PyImport_AddModule(const_cast<char *>("__main__"))))));   
    object main_namespace = main_module.attr("__dict__");
    main_namespace["tempService"] = service_;

    try {
       object result((boost::python::handle<>(PyRun_String("tempService.postProcessEvent()",
                       Py_eval_input,
                       main_namespace.ptr(),
                       main_namespace.ptr()))));      
    }catch( error_already_set ) {
       pythonToCppException("RuntimeError");
    }

}

void PythonService::preProcessEvent	(	const edm::EventID &	iID,
		const edm::Timestamp &	iTime
	)

Definition at line 102 of file PythonService.cc.

{
   
}

Member Data Documentation

std::string PythonService::command_

private

Definition at line 47 of file PythonService.h.

Referenced by PythonService().

std::string PythonService::fileName_

private

Definition at line 46 of file PythonService.h.

PythonManagerHandle PythonService::handle_

private

Definition at line 44 of file PythonService.h.

boost::python::object PythonService::service_

private

Definition at line 45 of file PythonService.h.

Referenced by postBeginJob(), postEndJob(), postProcessEvent(), and PythonService().