distribution/registry/middleware/repository/middleware.go
Andy Goldstein b5a63d75ea Fix Godoc typos
Signed-off-by: Andy Goldstein <agoldste@redhat.com>
2015-03-11 08:56:29 -07:00

39 lines
1.2 KiB
Go

package middleware
import (
"fmt"
"github.com/docker/distribution"
)
// InitFunc is the type of a RepositoryMiddleware factory function and is
// used to register the constructor for different RepositoryMiddleware backends.
type InitFunc func(repository distribution.Repository, options map[string]interface{}) (distribution.Repository, error)
var middlewares map[string]InitFunc
// Register is used to register an InitFunc for
// a RepositoryMiddleware backend with the given name.
func Register(name string, initFunc InitFunc) error {
if middlewares == nil {
middlewares = make(map[string]InitFunc)
}
if _, exists := middlewares[name]; exists {
return fmt.Errorf("name already registered: %s", name)
}
middlewares[name] = initFunc
return nil
}
// Get constructs a RepositoryMiddleware with the given options using the named backend.
func Get(name string, options map[string]interface{}, repository distribution.Repository) (distribution.Repository, error) {
if middlewares != nil {
if initFunc, exists := middlewares[name]; exists {
return initFunc(repository, options)
}
}
return nil, fmt.Errorf("no repository middleware registered with name: %s", name)
}