| # Gaudi Framework, version v20r4
Generated: 8 Jan 2009

# GslSvc Class Reference

`#include <GslSvc.h>`

Inheritance diagram for GslSvc:

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Collaboration diagram for GslSvc:

[legend]

List of all members.

## Detailed Description

The implementation of IGslSvc interface.

The Gsl Service is teh service which perform intelligent error handling for GSL (GNU Scientific Library)

It provides a choice between different "Error Handling Policies"

Current implementation supports the several "error handling policies", which are driven by "ErrorPolicy" property of class GslSvc:

- "GSL": The simplest error policy, no action, the error hadling defined in GSL does not redefined

- "Off": The GSL empty error handling is used, what means the ignorance of all GSL errors. Program continues after any error, so the return values from any library routines must be checked. This policy is recommended by GSL team for production programs

- "Abort" The default GSL error policy, causes abort on error.

- "Ignore" The policy which is essentialy the same as "Off", but performed with local error handler GslErrorHandlers::ignoreTheError

- "Exception" This policy throws the GaudiException with tag *GSL Error" to be thrown at the error. The policy implemented by lcal error handler GslErrorHandlers::throwException

- "Handle" The policy which uses the call back from local error handler GslErrorHandlers::handleTheError to IGslSvc::handle method. Current implementation of this method is sequential execution of declared handlers, defined throught the property "Handlers" of class GslSvc in a format: GslSvc.Handlers = { "H1Type/H1Name" , "H2Type/H2Name" , "H3ype/3Name" }; The "handlers" must implement IGslErrorHandler interface The concrete hamdlers are provided in GaudiGSL package: class GslErorCount, GslErrorPrint and GslErrorException.

Attention:
  The error handling could be "turned off" for selected error codes (e.g. GSL_SUCCESS or GSL_CONTINUE ) using "IgnoreCodes" property. This feature is active only for "Handle" error policy.

See also:
  GslErrorHandlers

  GslErrorHandlers::ingnoreTheError

  GslErrorHandlers::throwException

  GslErrorHandlers::handleTheError

  IGslSvc

  IGslErrorHandler

  GslErrorCount

  GslErrorPrint

  GslErrorException

Author:
  Vanya Belyaev Ivan.Belyaev@itep.ru

Date:
  29/04/2002

Definition at line 86 of file GslSvc.h.

## Public Member Functions
virtual StatusCode | handle (const GslError &error) const
| handle the GSL error
virtual GslErrorHandler | handler () const
| retrieve the current GSL error handler
virtual GslErrorHandler | setHandler (GslErrorHandler handler) const
| set new GSL error handler
virtual StatusCode | status (const int error) const
| transform GSL error code to Gaudi status code
virtual StatusCode | initialize ()
| standard service initialization
virtual StatusCode | finalize ()
| standard service finalization
virtual StatusCode | queryInterface (const InterfaceID &iid, void **ppi)
| query the interface
| GslSvc (const std::string &name, ISvcLocator *svc)
| Standard constructor.
virtual | ~GslSvc ()
| destructor, virtual and protected
## Private Types
typedef std::vector< std::string > | Names
| external hanlers
typedef std::vector < IGslErrorHandler * > | Handlers
## Private Member Functions
| GslSvc ()
| default constructor is private
| GslSvc (const GslSvc &)
| copy constructor is private
GslSvc & | operator= (const GslSvc &)
| assignement operator is private
## Private Attributes
std::string | m_errorPolicy
| error policy
Names | m_handlersTypeNames
Handlers | m_handlers
std::vector< int > | m_ignore
| codes to be ignored
## Friends
class | SvcFactory< GslSvc >
| friend factrory for instantiation

## Member Typedef Documentation

typedef std::vector<std::string> GslSvc::Names`[private]`

external hanlers

Definition at line 177 of file GslSvc.h.

typedef std::vector<IGslErrorHandler*> GslSvc::Handlers`[private]`

Definition at line 179 of file GslSvc.h.

## Constructor & Destructor Documentation

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

Standard constructor.

See also:
  Service

Parameters:

  | name | service name
  | scv | pointer to service locator
  | name | service name
  | scv | pointer to service locator

Definition at line 49 of file GslSvc.cpp.

    00051   : Service ( name , svc )
    00052   , m_errorPolicy       ( "GSL" )
    00053   , m_handlersTypeNames ()
    00054   , m_handlers          ()
    00055   , m_ignore            ()
    00056 {
    00057   declareProperty( "ErrorPolicy" , m_errorPolicy       ) ;
    00058   declareProperty( "Handlers"    , m_handlersTypeNames ) ;
    00059   declareProperty( "IgnoreCodes" , m_ignore            ) ;
    00060 };

GslSvc::~GslSvc | ( |  | ) | `[virtual]`

destructor, virtual and protected

destructor

Definition at line 66 of file GslSvc.cpp.

    00066 {};

GslSvc::GslSvc | ( |  | ) | `[private]`

default constructor is private

GslSvc::GslSvc | ( | const GslSvc & |  | ) | `[private]`

copy constructor is private

## Member Function Documentation

StatusCode GslSvc::handle | ( | const GslError & | error | ) | const`[virtual]`

handle the GSL error

See also:
  IGslSvc

Parameters:

  | err | error

Returns:
  status code

Parameters:

  | error | error

Returns:
  status code

Implements IGslSvc.

Definition at line 268 of file GslSvc.cpp.

    00269 {
    00270   StatusCode sc = StatusCode::SUCCESS ;
    00271   // code to be ignored?
    00272   if( m_ignore.end() != std::find( m_ignore.begin () ,
    00273                                    m_ignore.end   () ,
    00274                                    error.code        ) ) { return sc ; }
    00275   // invoke all handlers
    00276   for( Handlers::const_iterator handler = m_handlers.begin() ;
    00277        sc.isSuccess() && m_handlers.end() != handler ; ++handler )
    00278     { sc = (*handler)->handle( error  ); }
    00279   //
    00280   return sc ;
    00281 };

IGslSvc::GslErrorHandler GslSvc::handler | ( |  | ) | const`[virtual]`

retrieve the current GSL error handler

See also:
  IGslSvc

Returns:
  current GSL error handler

  current GSL error handler

Implements IGslSvc.

Definition at line 217 of file GslSvc.cpp.

    00218 {
    00219   GslErrorHandler hh = gsl_set_error_handler( 0 );
    00220   gsl_set_error_handler( hh );
    00221   return hh ;
    00222 };

virtual GslErrorHandler GslSvc::setHandler | ( | GslErrorHandler | handler | ) | const`[virtual]`

set new GSL error handler

See also:
  IGslSvc

Parameters:

  | handler | new GSL error handler

Returns:
  GSL error handler

StatusCode GslSvc::status | ( | const int | error | ) | const`[virtual]`

transform GSL error code to Gaudi status code

See also:
  IGslSvc

Parameters:

  | error | GLS error code

Returns:
  status code

Parameters:

  | error | GLS error code

Returns:
  status code

Implements IGslSvc.

Definition at line 252 of file GslSvc.cpp.

    00253 {
    00254   if( GSL_SUCCESS == error ){ return StatusCode::SUCCESS ; }
    00255   StatusCode sc( error );
    00256   if( sc.isSuccess()       ){ return StatusCode::FAILURE ; }
    00257   return sc ;
    00258 };

StatusCode GslSvc::initialize | ( |  | ) | `[virtual]`

standard service initialization

See also:
  Service

  IGslSvc

  IService

Returns:
  status code

See also:
  Service

  IService

Returns:
  status code

Prints the type of used handler get the handler

Get Tool Service

Reimplemented from Service.

Definition at line 76 of file GslSvc.cpp.

    00077 {
    00078   // initialize the base class
    00079   StatusCode sc = Service::initialize();
    00080   MsgStream log( msgSvc() , name() );
    00081   if( sc.isFailure() )
    00082     { log << MSG::ERROR
    00083           << " Error in initialization of base class 'Service'"<< endreq;
    00084     return sc;
    00085     }
    00086   // activate the static accessor to the service
    00087   GaudiGSL::setGslSvc( this );
    00088   // set the error handlers
    00089   if      ( "GSL"       == m_errorPolicy ) { /* nothing to do */ }
    00090   else if ( "Off"       == m_errorPolicy )
    00091     { gsl_set_error_handler_off()                                ; }
    00092   else if ( "Abort"     == m_errorPolicy )
    00093     { gsl_set_error_handler ( 0 )                                ; }
    00094   else if ( "Ignore"    == m_errorPolicy )
    00095     { gsl_set_error_handler ( GslErrorHandlers::ignoreTheError ) ; }
    00096   else if ( "Exception" == m_errorPolicy )
    00097     { gsl_set_error_handler ( GslErrorHandlers::throwException ) ; }
    00098   else if ( "Handle"    == m_errorPolicy )
    00099     { gsl_set_error_handler ( GslErrorHandlers::handleTheError ) ; }
    00100   else
    00101     { log << MSG::ERROR
    00102           << " Unknown Error policy '" << m_errorPolicy << "'"
    00103           << " Valid policies: "
    00104           << "[ 'GSL' , 'Off' , 'Abort' , 'Ignore' , 'Exception' , 'Handle' ]"
    00105           << endreq;
    00106     return StatusCode::FAILURE ;
    00107     }
    00110   GslErrorHandler handler = gsl_set_error_handler( 0 );
    00111   gsl_set_error_handler( handler );
    00112   if( 0 != handler )
    00113     { log << MSG::VERBOSE
    00114           << " GSL Error Handler is '"
    00115           << System::typeinfoName( typeid(*handler) ) << "'"
    00116           << endreq; }
    00117   else { log << MSG::INFO << " Error Handler is NULL" << endreq ; }
    00118
    00119   if( !m_handlersTypeNames.empty() )
    00120     {
    00122       IToolSvc* toolsvc = 0 ;
    00123       StatusCode sc =
    00124         serviceLocator()->service( "ToolSvc" , toolsvc , true );
    00125       if ( sc.isFailure() )
    00126         { log << MSG::ERROR << " Could not locate Tool Service! " << endreq ;
    00127         return sc ; }
    00128       if ( 0 == toolsvc   )
    00129         { log << MSG::ERROR << " Could not locate Tool Service! " << endreq ;
    00130         return StatusCode::FAILURE ; }
    00131       for( Names::const_iterator it = m_handlersTypeNames.begin() ;
    00132            m_handlersTypeNames.end() != it ; ++it )
    00133         {
    00134           std::string::const_iterator ipos =
    00135             std::find( it->begin() , it->end() , '/');
    00136           const std::string::size_type pos = ipos - it->begin() ;
    00137           IGslErrorHandler* eh = 0 ;
    00138           if( it->end() != ipos )
    00139             { sc = toolsvc->retrieveTool
    00140                 ( std::string( *it , 0 , pos )       ,
    00141                   std::string( *it , pos + 1, it->length() ), eh , this ) ; }
    00142           else
    00143             { sc = toolsvc->retrieveTool
    00144                 ( *it , std::string( *it , pos + 1, it->length() ) ,
    00145                   eh , this ) ; }
    00146           if( sc.isFailure() )
    00147             { log << MSG::ERROR
    00148                   << " Could not retrieve tool '" << *it << "'"<< endreq ;
    00149             return sc ; }
    00150           if( 0 == eh )
    00151             { log << MSG::ERROR
    00152                   << " Could not retrieve tool '" << *it << "'"<< endreq ;
    00153             return StatusCode::FAILURE  ; }
    00154           m_handlers.push_back( eh );
    00155         }
    00156     }
    00157   //
    00158   return StatusCode::SUCCESS;
    00159 };

StatusCode GslSvc::finalize | ( | void |  | ) | `[virtual]`

standard service finalization

See also:
  Service

  IGslSvc

  IService

Returns:
  status code

See also:
  Service

  IService

Returns:
  status code

Reimplemented from Service.

Definition at line 169 of file GslSvc.cpp.

    00170 {
    00171   MsgStream log(msgSvc(), name());
    00172   log << MSG::DEBUG << "==> Finalize" << endreq;
    00173
    00174   // deactivate the static accessor to the service
    00175   GaudiGSL::setGslSvc( 0 );
    00176
    00177   // finalize the base class
    00178   return Service::finalize() ;
    00179 };

StatusCode GslSvc::queryInterface | ( | const InterfaceID & | iid,
|  | void ** | ppi |
| ) |  |  | `[virtual]`

query the interface

See also:
  Service

  IGslSvc

  IService

  IInterface

Parameters:

  | iid | the unique interface
  | ppi | the placeholder to put the interface

Returns:
  status code

See also:
  Service

  IService

  IInterface

Parameters:

  | iid | the unique interface
  | ppi | the placeholder to put the interface

Returns:
  status code

Reimplemented from Service.

Definition at line 193 of file GslSvc.cpp.

    00195 {
    00196   if     ( 0 == ppi                          ) { return StatusCode::FAILURE ; }
    00197   if     ( IGslSvc::    interfaceID() == iid )
    00198     { *ppi = static_cast<IGslSvc*>    ( this ); }
    00199   else if( IService::   interfaceID() == iid )
    00200     { *ppi = static_cast<IService*>   ( this ); }
    00201   else if( IInterface:: interfaceID() == iid )
    00202     { *ppi = static_cast<IInterface*> ( this ); }
    00203   else
    00204     { return Service::queryInterface( iid , ppi ) ; }      // RETURN !
    00205   //
    00206   addRef();
    00207   //
    00208   return StatusCode::SUCCESS ;
    00209 };

GslSvc& GslSvc::operator= | ( | const GslSvc & |  | ) | `[private]`

assignement operator is private

## Friends And Related Function Documentation

friend class SvcFactory< GslSvc >`[friend]`

friend factrory for instantiation

Definition at line 91 of file GslSvc.h.

## Member Data Documentation

std::string GslSvc::m_errorPolicy`[private]`

error policy

Definition at line 174 of file GslSvc.h.

Names GslSvc::m_handlersTypeNames`[private]`

Definition at line 178 of file GslSvc.h.

Handlers GslSvc::m_handlers`[private]`

Definition at line 180 of file GslSvc.h.

std::vector<int> GslSvc::m_ignore`[private]`

codes to be ignored

Definition at line 183 of file GslSvc.h.

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

- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v20r4/GaudiGSL/src/Components/GslSvc.h
- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v20r4/GaudiGSL/src/Components/GslSvc.cpp