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Evolution-Data-Server Manual: Backend Utilities (libebackend) |  |
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Synopsis
#include <libebackend/libebackend.h> struct EBackendFactory; const gchar * e_backend_factory_get_hash_key (EBackendFactory *factory); EBackend * e_backend_factory_new_backend (EBackendFactory *factory,ESource *source);
Description
An EBackendFactory's job is to create an EBackend instance for a given ESource. EBackendFactory and EBackend should be subclassed together, so that each type of EBackendFactory creates a unique type of EBackend.
Each EBackendFactory subclass must define a hash key to uniquely identify itself among other EBackendFactory subclasses. EDataFactory then services incoming connection requests by deriving a hash key from the requested ESource, using the dervied hash key to find an appropriate EBackendFactory, and creating an EBackend instance from that factory to pair with the requested ESource.
Details
struct EBackendFactory
struct EBackendFactory;
Contains only private data that should be read and manipulated using the functions below.
Since 3.4
e_backend_factory_get_hash_key ()
const gchar * e_backend_factory_get_hash_key (EBackendFactory *factory);
Returns a hash key which uniquely identifies factory.
Since only one instance of each EBackendFactory subclass is ever created, the hash key need only be unique among subclasses, not among instances of each subclass.
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an EBackendFactory |
Returns : |
a hash key which uniquely identifies factory
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Since 3.4
e_backend_factory_new_backend ()
EBackend * e_backend_factory_new_backend (EBackendFactory *factory,ESource *source);
Returns a new EBackend instance for source.
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an EBackendFactory |
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an ESource |
Returns : |
a new EBackend instance for source
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Since 3.4