PythonScriptingSvc Class Reference

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

#include <GaudiPython/PythonScriptingSvc.h>

Inheritance diagram for PythonScriptingSvc:

Collaboration diagram for PythonScriptingSvc:

List of all members.

Public Member Functions
	PythonScriptingSvc (const std::string &name, ISvcLocator *svc)
	Standard Constructor.
virtual StatusCode	initialize ()
	Initialize the service. [IService::initialize()].
virtual StatusCode	finalize ()
	Finalize the service. [IService::finalize()].
virtual StatusCode	run ()
	Run the service by taking full control. [IRunable::run()].
Protected Member Functions
virtual	~PythonScriptingSvc ()
	Destructor.
Private Attributes
std::string	m_startupScript
	Startup script.

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Detailed Description

This service handles scripting implemented using Python.

Author:

Pere Mato

David Quarrie

Date:

2001

Definition at line 16 of file PythonScriptingSvc.h.

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Constructor & Destructor Documentation

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

Standard Constructor.

Definition at line 27 of file PythonScriptingSvc.cpp.

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

PythonScriptingSvc::~PythonScriptingSvc

(

)

[protected, virtual]

Destructor.

Definition at line 35 of file PythonScriptingSvc.cpp.

{ }

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Member Function Documentation

StatusCode PythonScriptingSvc::finalize

(

void

)

[virtual]

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

Reimplemented from Service.

Definition at line 101 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

(

void

)

[virtual]

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

Reimplemented from Service.

Definition at line 39 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 == "" ) {
    SmartIF<IProperty> prpMgr(serviceLocator());
    if ( prpMgr.isValid() )   {
      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()].

Implements IRunable.

Definition at line 116 of file PythonScriptingSvc.cpp.

{
  MsgStream log( msgSvc(), name() );
  if ( m_startupScript != "" ) {
    std::ifstream file(m_startupScript.c_str());
    std::stringstream stream;
    if( file ) {
      char ch;
      while( file.get(ch) ) stream.put(ch);
      PyRun_SimpleString( const_cast<char*>(stream.str().c_str()) );
      file.close();
    }
    else {
      log << MSG::WARNING << "Python startup file " << m_startupScript << " not found" << endmsg;
    }
  }
  PyRun_InteractiveLoop(stdin, "\0");
  return StatusCode::SUCCESS;
}

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Member Data Documentation

std::string PythonScriptingSvc::m_startupScript [private]

Startup script.

Definition at line 36 of file PythonScriptingSvc.h.

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

• /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r4/GaudiPython/src/Services/PythonScriptingSvc.h
• /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r4/GaudiPython/src/Services/PythonScriptingSvc.cpp