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# IoComponentMgr.cpp

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    00001
    00002 // IoComponentMgr.cxx
    00003 // Implementation file for class IoComponentMgr
    00004 // Author: S.Binet<binet@cern.ch>
    00006
    00007 // python includes
    00008 #include <Python.h>
    00009
    00010 // GaudiMP includes
    00011 #include "IoComponentMgr.h"
    00012
    00013
    00014 // STL includes
    00015
    00016 // FrameWork includes
    00017 #include "GaudiKernel/SvcFactory.h"
    00018 #include "GaudiKernel/Property.h"
    00019
    00020 DECLARE_SERVICE_FACTORY(IoComponentMgr)
    00021
    00022
    00023
    00024 // Public methods:
    00026
    00027 // Constructors
    00029 IoComponentMgr::IoComponentMgr( const std::string& name,
    00030                                 ISvcLocator* svc )
    00031 : base_class(name,svc), m_log(msgSvc(), name ),
    00032     m_dict   ( 0 )
    00033 {
    00034   //
    00035   // Property declaration
    00036   //
    00037   //declareProperty( "Property", m_nProperty );
    00038
    00039 //   declareProperty ("Registry",
    00040 //                 m_dict_location = "GaudiMP.IoRegistry.registry",
    00041 //                 "Location of the python dictionary holding the "
    00042 //                 "associations: \n"
    00043 //                 " {component-name:{ 'old-fname' : ['io','new-fname'] }}\n"
    00044 //                 "\nSyntax: <python-module>.<python-module>.<fct-name> \n"
    00045 //                 " where fct-name is a function returning the wanted "
    00046 //                 " dictionary.");
    00047 }
    00048
    00049 // Destructor
    00051 IoComponentMgr::~IoComponentMgr()
    00052 {
    00053   Py_XDECREF (m_dict);
    00054 }
    00055
    00056 // Service's Hooks
    00058 StatusCode IoComponentMgr::initialize()
    00059 {
    00060   m_log << MSG::INFO << "Initializing " << name() << "..." << endmsg;
    00061
    00062   if ( Service::initialize().isFailure() ) {
    00063     m_log << MSG::ERROR << "Unable to initialize Service base class" << endmsg;
    00064     return StatusCode::FAILURE;
    00065   }
    00066   m_log.setLevel( m_outputLevel.value() );
    00067
    00068   if ( ! Py_IsInitialized() ) {
    00069     if (m_log.level() <= MSG::DEBUG) {
    00070       m_log << MSG::DEBUG << "Initializing Python" << endmsg;
    00071     }
    00072     PyEval_InitThreads();
    00073     Py_Initialize();
    00074
    00075     if ( ! Py_IsInitialized() ) {
    00076       m_log << MSG::ERROR << "Unable to initialize Python" << endmsg;
    00077       return StatusCode::FAILURE;
    00078     }
    00079   }
    00080
    00081
    00082   // retrieve the python dictionary holding the I/O registry
    00083   const std::string py_module_name = "GaudiMP.IoRegistry";
    00084   m_log << MSG::DEBUG << "importing module [" << py_module_name << "]..."
    00085         << endmsg;
    00086   PyObject *module = PyImport_ImportModule ((char*)py_module_name.c_str());
    00087   if ( !module || !PyModule_Check (module) ) {
    00088     m_log << MSG::ERROR << "Could not import [" << py_module_name << "] !"
    00089           << endmsg;
    00090     Py_XDECREF (module);
    00091     return StatusCode::FAILURE;
    00092   }
    00093
    00094   const std::string py_class_name = "IoRegistry";
    00095   PyObject *pyclass = PyDict_GetItemString (PyModule_GetDict(module),
    00096                                             (char*)py_class_name.c_str());
    00097   // borrowed ref.
    00098   Py_XINCREF (pyclass);
    00099   if ( !pyclass ) {
    00100     m_log << MSG::ERROR << "Could not import ["
    00101           << py_class_name << "] from module ["
    00102           << py_module_name << "] !"
    00103           << endmsg ;
    00104     Py_XDECREF (pyclass);
    00105     Py_DECREF  (module);
    00106     return StatusCode::FAILURE;
    00107   }
    00108
    00109   m_dict = PyObject_GetAttrString (pyclass, (char*)"instances");
    00110   if ( !m_dict || !PyDict_Check (m_dict) ) {
    00111     m_log << MSG::ERROR
    00112           << "could not retrieve attribute [instances] from class ["
    00113           << py_module_name << "." << py_class_name << "] !" << endmsg;
    00114     Py_DECREF (pyclass);
    00115     Py_DECREF (module);
    00116     return StatusCode::FAILURE;
    00117   }
    00118
    00119   m_log << MSG::INFO <<  "python I/O registry retrieved [ok]" << endmsg;
    00120   if ( m_log.level() <=  MSG::DEBUG ) {
    00121     std::string repr = "";
    00122     // PyObject_Repr returns a new ref.
    00123     PyObject* py_repr = PyObject_Repr (m_dict);
    00124     if ( py_repr && PyString_Check(py_repr) ) {
    00125       repr = PyString_AsString(py_repr);
    00126     }
    00127     Py_XDECREF( py_repr );
    00128     m_log << MSG::DEBUG << "content: " << repr << endmsg;
    00129   }
    00130
    00131   return StatusCode::SUCCESS;
    00132 }
    00133
    00134 StatusCode IoComponentMgr::finalize()
    00135 {
    00136   m_log << MSG::INFO << "Finalizing " << name() << "..." << endmsg;
    00137
    00138
    00139   if (m_log.level() <= MSG::DEBUG) {
    00140     m_log << MSG::DEBUG << "Listing all monitored entries: " << std::endl;
    00141
    00142     std::string repr = "";
    00143     // PyObject_Repr returns a new ref.
    00144     PyObject* py_repr = PyObject_Repr (m_dict);
    00145     if ( py_repr && PyString_Check(py_repr) ) {
    00146       repr = PyString_AsString(py_repr);
    00147     }
    00148     Py_XDECREF( py_repr );
    00149     m_log << MSG::DEBUG << "content: " << repr << endmsg;
    00150   }
    00151
    00152   return StatusCode::SUCCESS;
    00153 }
    00154
    00156 // Const methods:
    00158
    00161 bool
    00162 IoComponentMgr::io_hasitem (IIoComponent* iocomponent) const
    00163 {
    00164   if ( 0 == iocomponent ) {
    00165     return false;
    00166   }
    00167   const std::string& ioname = iocomponent->name();
    00168   IoRegistry_t::const_iterator io = m_ioregistry.find (ioname);
    00169   return io != m_ioregistry.end();
    00170 }
    00171
    00175 bool
    00176 IoComponentMgr::io_contains (IIoComponent* iocomponent,
    00177                              const std::string& fname) const
    00178 {
    00179   if ( 0 == iocomponent ) {
    00180     return false;
    00181   }
    00182   const std::string& ioname = iocomponent->name();
    00183
    00184   // m_dict is a python dictionary like so:
    00185   //  { 'iocomp-name' : { 'oldfname' : [ 'iomode', 'newfname' ] } }
    00186
    00187   // -> check there is an 'iocomp-name' entry
    00188   // -> retrieve that entry
    00189   PyObject *o = PyDict_GetItemString (m_dict, (char*)ioname.c_str());
    00190   Py_XINCREF (o);
    00191
    00192   // -> check it is a dictionary
    00193   if ( NULL==o || !PyDict_Check (o) ) {
    00194     Py_XDECREF (o);
    00195
    00196     return false;
    00197   }
    00198
    00199   // -> check 'oldfname' exists
    00200   PyObject *item = PyDict_GetItemString (o, (char*)fname.c_str());
    00201
    00202   const bool contains = (item != 0);
    00203   if ( contains == false ) {
    00204     std::string repr = "";
    00205     // PyObject_Repr returns a new ref.
    00206     PyObject* py_repr = PyObject_Repr (o);
    00207     if ( py_repr && PyString_Check(py_repr) ) {
    00208       repr = PyString_AsString(py_repr);
    00209     }
    00210     Py_XDECREF( py_repr );
    00211     m_log << MSG::ERROR << "content: " << repr << endmsg;
    00212   }
    00213   Py_DECREF (o);
    00214   Py_XDECREF(item);
    00215   return contains;
    00216 }
    00217
    00219 // Non-const methods:
    00221
    00228 StatusCode
    00229 IoComponentMgr::io_register (IIoComponent* iocomponent)
    00230 {
    00231   if ( 0 == iocomponent ) {
    00232     m_log << MSG::ERROR
    00233           << "io_register (component) received a NULL pointer !" << endmsg;
    00234     return StatusCode::FAILURE;
    00235   }
    00236   const std::string& ioname = iocomponent->name();
    00237   IoRegistry_t::iterator itr = m_ioregistry.find (ioname);
    00238   if ( itr == m_ioregistry.end() ) {
    00239     iocomponent->addRef(); // ownership...
    00240     m_ioregistry[ioname] = iocomponent;
    00241     m_iostack.push_back (iocomponent);
    00242   } else {
    00243     m_log << MSG::INFO << "IoComponent[" << iocomponent->name()
    00244           <<"] already registered @" << (void*)itr->second << endmsg;
    00245   }
    00246   return StatusCode::SUCCESS;
    00247 }
    00248
    00255 StatusCode
    00256 IoComponentMgr::io_register (IIoComponent* iocomponent,
    00257                              IIoComponentMgr::IoMode::Type iomode,
    00258                              const std::string& fname)
    00259 {
    00260   if ( 0 == iocomponent ) {
    00261     return StatusCode::FAILURE;
    00262   }
    00263   const std::string& ioname = iocomponent->name();
    00264
    00265   if ( !io_hasitem (iocomponent) ) {
    00266     if ( !io_register (iocomponent).isSuccess() ) {
    00267       m_log << MSG::ERROR
    00268             << "could not register component [" << iocomponent->name() << "] "
    00269             << "with the I/O component manager !"
    00270             << endmsg;
    00271       return StatusCode::FAILURE;
    00272     }
    00273   }
    00274
    00275   // m_dict is a python dictionary like so:
    00276   //  { 'iocomp-name' : { 'oldfname' : [ 'iomode', 'newfname' ] } }
    00277
    00278   // -> check there is an 'iocomp-name' entry
    00279   // -> retrieve that entry
    00280   PyObject *o = PyDict_GetItemString (m_dict, (char*)ioname.c_str());
    00281
    00282   // -> check it is a dictionary
    00283   if ( NULL==o ) {
    00284     o = PyDict_New();
    00285     if (NULL == o) {
    00286       m_log << MSG::ERROR << "could not create an I/O entry for ["
    00287             << ioname << "] "
    00288             << "in the I/O registry !" << endmsg;
    00289       return StatusCode::FAILURE;
    00290     }
    00291     if ( 0 != PyDict_SetItemString (m_dict, (char*)ioname.c_str(), o) ) {
    00292       Py_DECREF (o);
    00293       m_log << MSG::ERROR << "could not create an I/O entry for ["
    00294             << ioname << "] " << "in the I/O registry !" << endmsg;
    00295       return StatusCode::FAILURE;
    00296     }
    00297   } else if ( !PyDict_Check (o) ) {
    00298     m_log << MSG::ERROR
    00299           << "internal consistency error (expected a dictionary !)"
    00300           << endmsg;
    00301     return StatusCode::FAILURE;
    00302   } else {
    00303     // borrowed ref.
    00304     Py_INCREF (o);
    00305   }
    00306
    00307   // -> check if 'fname' has already been registered
    00308   std::string mode;
    00309   switch (iomode) {
    00310   case IIoComponentMgr::IoMode::Input: mode ="<input>"; break;
    00311   case IIoComponentMgr::IoMode::Output:mode ="<output>";break;
    00312   default:
    00313     m_log << MSG::ERROR << "unknown value for iomode: [" << iomode << "] !"
    00314           << endmsg;
    00315     Py_DECREF (o);
    00316     return StatusCode::FAILURE;
    00317   }
    00318
    00319   PyObject *val = PyDict_GetItemString (o, (char*)fname.c_str());
    00320   if ( 0 != val ) {
    00321     Py_DECREF (o);
    00322     return StatusCode::SUCCESS;
    00323   }
    00324
    00325   val = PyList_New(2);
    00326   if ( 0 == val ) {
    00327     m_log << MSG::ERROR << "could not allocate a python-list !" << endmsg;
    00328     Py_DECREF (o);
    00329     return StatusCode::FAILURE;
    00330   }
    00331
    00332   int err = PyList_SetItem (val,
    00333                             0, PyString_FromString ((char*)mode.c_str()));
    00334   if (err) {
    00335     Py_DECREF (val);
    00336     Py_DECREF (o);
    00337     m_log << MSG::ERROR << "could not set py-iomode !" << endmsg;
    00338     return StatusCode::FAILURE;
    00339   }
    00340   Py_INCREF (Py_None);
    00341   // PyList_SetItem steals the ref...
    00342   err = PyList_SetItem (val, 1, Py_None);
    00343   if (err) {
    00344     Py_DECREF (val);
    00345     Py_DECREF (o);
    00346     m_log << MSG::ERROR << "could not properly fill python-list !" << endmsg;
    00347     return StatusCode::FAILURE;
    00348   }
    00349   err = PyDict_SetItemString (o, (char*)fname.c_str(), val);
    00350   if (err) {
    00351     m_log << MSG::ERROR << "could not properly fill registry w/ python-list !"
    00352           << endmsg;
    00353     Py_DECREF (val);
    00354     Py_DECREF (o);
    00355     return StatusCode::FAILURE;
    00356   }
    00357   Py_DECREF (o);
    00358   return StatusCode::SUCCESS;
    00359 }
    00360
    00364 StatusCode
    00365 IoComponentMgr::io_retrieve (IIoComponent* iocomponent,
    00366                              std::string& fname)
    00367 {
    00368   if ( 0 == iocomponent ) {
    00369     return StatusCode::FAILURE;
    00370   }
    00371
    00372   const std::string& ioname = iocomponent->name();
    00373
    00374   // m_dict is a python dictionary like so:
    00375   //  { 'iocomp-name' : { 'oldfname' : [ 'iomode', 'newfname' ] } }
    00376
    00377   // -> check there is an 'iocomp-name' entry
    00378   // -> retrieve that entry
    00379   PyObject *o = PyDict_GetItemString (m_dict, (char*)ioname.c_str());
    00380   Py_XINCREF (o);
    00381
    00382   // -> check it is a dictionary
    00383   if ( NULL==o || !PyDict_Check (o) ) {
    00384     Py_XDECREF (o);
    00385     return StatusCode::FAILURE;
    00386   }
    00387
    00388   // -> check 'oldfname' exists
    00389   PyObject *pylist = PyDict_GetItemString (o, (char*)fname.c_str());
    00390   Py_XINCREF (pylist);
    00391
    00392   if ( NULL==pylist || !PyList_Check (pylist) ) {
    00393     Py_XDECREF(pylist);
    00394     Py_DECREF (o);
    00395     return StatusCode::FAILURE;
    00396   }
    00397
    00398   const std::size_t sz = PyList_Size (pylist);
    00399   if ( 2 != sz ) {
    00400     m_log << MSG::ERROR << "[" << ioname << "][" << fname << "] list has size ["
    00401           << sz << " ! (expected sz==2)"
    00402           << endmsg;
    00403     Py_DECREF (o);
    00404     Py_DECREF (pylist);
    00405     return StatusCode::FAILURE;
    00406   }
    00407
    00408   fname = PyString_AsString ( PyList_GetItem (pylist, 1) );
    00409   Py_DECREF (o);
    00410   Py_DECREF (pylist);
    00411   return StatusCode::SUCCESS;
    00412 }
    00413
    00418 StatusCode
    00419 IoComponentMgr::io_reinitialize ()
    00420 {
    00421   m_log << MSG::DEBUG << "reinitializing I/O subsystem..." << endmsg;
    00422   bool allgood = true;
    00423   for ( IoStack_t::iterator io = m_iostack.begin(), ioEnd = m_iostack.end();
    00424         io != ioEnd;
    00425         ++io ) {
    00426     m_log << MSG::DEBUG << " [" << (*io)->name() << "]->io_reinit()..."
    00427           << endmsg;
    00428     if ( !(*io)->io_reinit().isSuccess() ) {
    00429       allgood = false;
    00430       m_log << MSG::ERROR << "problem in [" << (*io)->name()
    00431             << "]->io_reinit() !" << endmsg;
    00432     }
    00433     // we are done with this guy... release it
    00434     (*io)->release();
    00435   }
    00436
    00437   // we are done.
    00438   // FIXME: shall we allow for multiple io_reinitialize ?
    00439   m_iostack.clear();
    00440   m_ioregistry.clear();
    00441
    00442   return allgood
    00443     ? StatusCode::SUCCESS
    00444     : StatusCode::FAILURE;
    00445 }
    00446
    00451 StatusCode
    00452 IoComponentMgr::io_finalize ()
    00453 {
    00454   return StatusCode::SUCCESS;
    00455 }
    00456
    00458 // Protected methods:
    00460
    00462 // Const methods:
    00464
    00466 // Non-const methods:
    00468
    00469

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