PythonScriptingSvc Class Reference

This service handles scripting implemented using Python. More...

#include <GaudiPython/PythonScriptingSvc.h>

Inheritance diagram for PythonScriptingSvc:

Collaboration diagram for PythonScriptingSvc:

Public Member Functions
	PythonScriptingSvc (const std::string &name, ISvcLocator *svc)
	Standard Constructor. More...
virtual StatusCode	initialize ()
	Initialize the service. [IService::initialize()]. More...
virtual StatusCode	finalize ()
	Finalize the service. [IService::finalize()]. More...
virtual StatusCode	run ()
	Run the service by taking full control. [IRunable::run()]. More...
Public Member Functions inherited from extends< BASE, Interfaces >
void *	i_cast (const InterfaceID &tid) const override
	Implementation of IInterface::i_cast. More...
StatusCode	queryInterface (const InterfaceID &ti, void **pp) override
	Implementation of IInterface::queryInterface. More...
std::vector< std::string >	getInterfaceNames () const override
	Implementation of IInterface::getInterfaceNames. More...
	~extends () override=default
	Virtual destructor. More...
void *	i_cast (const InterfaceID &tid) const override
	Implementation of IInterface::i_cast. More...
StatusCode	queryInterface (const InterfaceID &ti, void **pp) override
	Implementation of IInterface::queryInterface. More...
std::vector< std::string >	getInterfaceNames () const override
	Implementation of IInterface::getInterfaceNames. More...
	~extends () override=default
	Virtual destructor. More...
Public Member Functions inherited from extend_interfaces< Interfaces...>
	~extend_interfaces () override=default
	Virtual destructor. More...
	~extend_interfaces () override=default
	Virtual destructor. More...

Protected Member Functions
virtual	~PythonScriptingSvc ()
	Destructor. More...

Private Attributes
std::string	m_startupScript
	Startup script. More...

Additional Inherited Members
Public Types inherited from extends< BASE, Interfaces >
using	base_class = extends
	Typedef to this class. More...
using	extend_interfaces_base = extend_interfaces< Interfaces...>
	Typedef to the base of this class. More...
using	base_class = extends
	Typedef to this class. More...
using	extend_interfaces_base = extend_interfaces< Interfaces...>
	Typedef to the base of this class. More...
Public Types inherited from extend_interfaces< Interfaces...>
using	ext_iids = typename Gaudi::interface_list_cat< typename Interfaces::ext_iids...>::type
	take union of the ext_iids of all Interfaces... More...
using	ext_iids = typename Gaudi::interface_list_cat< typename Interfaces::ext_iids...>::type
	take union of the ext_iids of all Interfaces... More...

Detailed Description

This service handles scripting implemented using Python.

Author

Pere Mato

David Quarrie

Date

2001

Definition at line 15 of file PythonScriptingSvc.h.

Constructor & Destructor Documentation

PythonScriptingSvc::PythonScriptingSvc	(	const std::string &	name,
		ISvcLocator *	svc
	)

Standard Constructor.

Definition at line 23 of file PythonScriptingSvc.cpp.

: base_class(name, svc) {
  // Declare the startup script Property
  declareProperty( "StartupScript", m_startupScript = "" );
}

PythonScriptingSvc::~PythonScriptingSvc ( )

protectedvirtual

Destructor.

Definition at line 31 of file PythonScriptingSvc.cpp.

{ }

Member Function Documentation

StatusCode PythonScriptingSvc::finalize ( )

virtual

Finalize the service. [IService::finalize()].

Definition at line 97 of file PythonScriptingSvc.cpp.

{
  // Finalize this specific service
  StatusCode sc = Service::finalize();
  if ( sc.isFailure() ) return sc;

  // Shutdown the Python interpreter
  Py_Finalize();
  return StatusCode::SUCCESS;
}

StatusCode PythonScriptingSvc::initialize ( )

virtual

Initialize the service. [IService::initialize()].

Definition at line 35 of file PythonScriptingSvc.cpp.

{
  // initialize the Service Base class
  StatusCode sc = Service::initialize();
  if ( sc.isFailure() ) return sc;

  MsgStream log( msgSvc(), name() );

  // Setup startup script. If none is explicitly specified, then
  // use the ApplicationMgr JobOptionsPath property as long as
  // the JobOptionsType property is set to "NONE".
  if( m_startupScript.empty() ) {
    auto prpMgr = serviceLocator()->as<IProperty>();
    if ( prpMgr )   {
      StringProperty tmp;
      tmp.assign(prpMgr->getProperty("JobOptionsType"));
      if ( tmp.value( ) == "NONE" ) {
        tmp.assign(prpMgr->getProperty("JobOptionsPath"));
        m_startupScript = tmp;
      }
    }
  }

  char* progName[] = { const_cast<char*>("GaudiPython") };

  // Initialize the Python interpreter.  Required.
  Py_Initialize();
  // Set argv for Tkinter (needs program name)
  PySys_SetArgv( 1, progName );
  // Get the Python version
  std::string fullversion = Py_GetVersion();
  std::string version( fullversion, 0, fullversion.find_first_of(' '));
  std::string vers(version, 0, version.find_first_of('.',version.find_first_of('.')+1));
  log << MSG::INFO << "Python version: [" << vers << "]" << endmsg;

#if defined(__linux)
  // This is hack to make global the python symbols
  // which are needed by the other python modules
  // (eg. readline, math, etc,) libraries.
  std::string libname = "libpython" + vers + ".so";
  dlopen(libname.c_str(), RTLD_GLOBAL | RTLD_LAZY);
#endif


  // Startup commands
  PyRun_SimpleString( "from gaudimodule import *" );
  PyRun_SimpleString( "g      = AppMgr()" );
  // backward compatibility with SIPython
  PyRun_SimpleString( "theApp = g" );
  PyRun_SimpleString( "def Service(n): return g.service(n)" );
  PyRun_SimpleString( "def Algorithm(n): return g.algorithm(n)" );
  PyRun_SimpleString( "def Property(n): return g.service(n)" );
  // For command-line completion (unix only)
#if !defined( _WIN32 )
  PyRun_SimpleString( "import rlcompleter");
  PyRun_SimpleString( "rlcompleter.readline.parse_and_bind('tab: complete')");
#endif
  return StatusCode::SUCCESS;
}

StatusCode PythonScriptingSvc::run ( )

virtual

Run the service by taking full control. [IRunable::run()].

Definition at line 110 of file PythonScriptingSvc.cpp.

{
  MsgStream log( msgSvc(), name() );
  if ( !m_startupScript.empty() ) {
    std::ifstream file{m_startupScript};
    std::stringstream stream;
    if( file ) {
      std::string buffer;
      file.seekg(0, std::ios::end);
      buffer.reserve(file.tellg());
      file.seekg(0, std::ios::beg);
      buffer.assign((std::istreambuf_iterator<char>{file}),
                     std::istreambuf_iterator<char>{});
      file.close();
      PyRun_SimpleString( buffer.c_str() );
    } else {
      log << MSG::WARNING << "Python startup file " << m_startupScript << " not found" << endmsg;
    }
  }
  PyRun_InteractiveLoop(stdin, "\0");
  return StatusCode::SUCCESS;
}

Member Data Documentation

std::string PythonScriptingSvc::m_startupScript

private

Startup script.

Definition at line 35 of file PythonScriptingSvc.h.

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The documentation for this class was generated from the following files:

• GaudiPython/src/Services/PythonScriptingSvc.h
• GaudiPython/src/Services/PythonScriptingSvc.cpp