| # Gaudi Framework, version v22r0 |

Home |  | Generated: 9 Feb 2011

# ISvcLocator Class Reference

The ISvcLocator is the interface implemented by the Service Factory in the Application Manager to locate services in the framework. More...

`#include <GaudiKernel/ISvcLocator.h>`

Inheritance diagram for ISvcLocator:
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Collaboration diagram for ISvcLocator:
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List of all members.

## Public Member Functions
| DeclareInterfaceID (ISvcLocator, 3, 0)
| InterfaceID.
virtual StatusCode | getService (const Gaudi::Utils::TypeNameString &typeName, IService *&svc, const bool createIf=true)
| Get a reference to the service given a service name.
virtual StatusCode | getService (const Gaudi::Utils::TypeNameString &typeName, const InterfaceID &iid, IInterface *&pinterface)
| Get a specific interface pointer given a service name and interface id.
virtual const std::list < IService * > & | getServices () const =0
| Get a reference to a service and create it if it does not exists.
virtual bool | existsService (const std::string &name) const =0
| Check the existence of a service given a service name.
template<class T >
StatusCode | service (const Gaudi::Utils::TypeNameString &name, T *&svc, bool createIf=true)
| Templated method to access a service by name.
template<class T >
StatusCode | service (const std::string &type, const std::string &name, T *&svc, bool createIf=true)
| Templated method to access a service by type and name.
virtual SmartIF< IService > & | service (const Gaudi::Utils::TypeNameString &typeName, const bool createIf=true)=0
| Returns a smart pointer to a service.
template<typename T >
SmartIF< T > | service (const Gaudi::Utils::TypeNameString &typeName, const bool createIf=true)
| Returns a smart pointer to the requested interface of a service.

## Detailed Description

The ISvcLocator is the interface implemented by the Service Factory in the Application Manager to locate services in the framework.

Clients use this interface to locate references to interfaces of services existing in the application. This operation needs to be done before the service can be used by the client. Typically "locating the services" is done at the initialization phase of the clients.

Author:
  Pere Mato

Definition at line 26 of file ISvcLocator.h.

## Member Function Documentation

ISvcLocator::DeclareInterfaceID | ( | ISvcLocator | ,
|  | 3 | ,
|  | 0 |  |
| ) |  |  |

InterfaceID.

virtual bool ISvcLocator::existsService | ( | const std::string & | name | ) | const`[pure virtual]`

Check the existence of a service given a service name.

Implemented in Gaudi::BootSvcLocator.

virtual StatusCode ISvcLocator::getService | ( | const Gaudi::Utils::TypeNameString & | typeName,
|  | const InterfaceID & | iid,
|  | IInterface *& | pinterface |
| ) |  |  | `[inline, virtual]`

Get a specific interface pointer given a service name and interface id.

Parameters:

  | name | Service name
  | iid | Interface ID
  | pinterface | Returned pointer to the requested interface

Reimplemented in Gaudi::BootSvcLocator.

Definition at line 52 of file ISvcLocator.h.

    00054                                                            {
    00055     SmartIF<IService> svc = service(typeName, false);
    00056     if (svc.isValid()) {
    00057       // Service found. So now get the right interface
    00058       return svc->queryInterface(iid, (void**)&pinterface);
    00059     }
    00060     return StatusCode::FAILURE;
    00061   }

virtual StatusCode ISvcLocator::getService | ( | const Gaudi::Utils::TypeNameString & | typeName,
|  | IService *& | svc,
|  | const bool | createIf = `true` |
| ) |  |  | `[inline, virtual]`

Get a reference to the service given a service name.

Parameters:

  | name | Service name
  | svc | Returned service pointer

Reimplemented in Gaudi::BootSvcLocator.

Definition at line 36 of file ISvcLocator.h.

    00037                                                                               {
    00038     SmartIF<IService> &s = service(typeName, createIf);
    00039     svc = s.get();
    00040     if (svc) {
    00041       svc->addRef(); // Needed to maintain the correct reference counting.
    00042       return StatusCode::SUCCESS;
    00043     }
    00044     return StatusCode::FAILURE;
    00045   }

virtual const std::list<IService*>& ISvcLocator::getServices | ( |  | ) | const`[pure virtual]`

Get a reference to a service and create it if it does not exists.

Parameters:

  | name | Service name
  | svc | Returned service pointer
  | createIf | flag to control the creation Return the list of Services

Implemented in Gaudi::BootSvcLocator.

template<typename T >

SmartIF<T> ISvcLocator::service | ( | const Gaudi::Utils::TypeNameString & | typeName,
|  | const bool | createIf = `true` |
| ) |  |  | `[inline]`

Returns a smart pointer to the requested interface of a service.

Reimplemented in Gaudi::BootSvcLocator.

Definition at line 104 of file ISvcLocator.h.

    00104                                                                                                   {
    00105     return SmartIF<T>(service(typeName, createIf));
    00106   }

virtual SmartIF<IService>& ISvcLocator::service | ( | const Gaudi::Utils::TypeNameString & | typeName,
|  | const bool | createIf = `true` |
| ) |  |  | `[pure virtual]`

Returns a smart pointer to a service.

Implemented in Gaudi::BootSvcLocator.

template<class T >

StatusCode ISvcLocator::service | ( | const std::string & | type,
|  | const std::string & | name,
|  | T *& | svc,
|  | bool | createIf = `true` |
| ) |  |  | `[inline]`

Templated method to access a service by type and name.

Definition at line 93 of file ISvcLocator.h.

    00094                                                       {
    00095     return service(type + "/" + name, svc, createIf);
    00096   }

template<class T >

StatusCode ISvcLocator::service | ( | const Gaudi::Utils::TypeNameString & | name,
|  | T *& | svc,
|  | bool | createIf = `true` |
| ) |  |  | `[inline]`

Templated method to access a service by name.

Definition at line 82 of file ISvcLocator.h.

    00082                                                                                             {
    00083     if( createIf ) {
    00084       IService* s;
    00085       StatusCode sc = getService( name, s, true);
    00086       if ( !sc.isSuccess() ) return sc;  // Must check if initialization was OK!
    00087     }
    00088     return getService( name, T::interfaceID(), (IInterface*&)svc );
    00089   }

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

- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r0/GaudiKernel/GaudiKernel/ISvcLocator.h

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