| package volumedrivers |
| |
| import ( |
| "fmt" |
| "sync" |
| |
| "github.com/docker/docker/pkg/plugins" |
| "github.com/docker/docker/volume" |
| ) |
| |
| // currently created by hand. generation tool would generate this like: |
| // $ extpoint-gen Driver > volume/extpoint.go |
| |
| var drivers = &driverExtpoint{extensions: make(map[string]volume.Driver)} |
| |
| type driverExtpoint struct { |
| extensions map[string]volume.Driver |
| sync.Mutex |
| } |
| |
| func Register(extension volume.Driver, name string) bool { |
| drivers.Lock() |
| defer drivers.Unlock() |
| if name == "" { |
| return false |
| } |
| _, exists := drivers.extensions[name] |
| if exists { |
| return false |
| } |
| drivers.extensions[name] = extension |
| return true |
| } |
| |
| func Unregister(name string) bool { |
| drivers.Lock() |
| defer drivers.Unlock() |
| _, exists := drivers.extensions[name] |
| if !exists { |
| return false |
| } |
| delete(drivers.extensions, name) |
| return true |
| } |
| |
| func Lookup(name string) (volume.Driver, error) { |
| drivers.Lock() |
| defer drivers.Unlock() |
| ext, ok := drivers.extensions[name] |
| if ok { |
| return ext, nil |
| } |
| pl, err := plugins.Get(name, "VolumeDriver") |
| if err != nil { |
| return nil, fmt.Errorf("Error looking up volume plugin %s: %v", name, err) |
| } |
| |
| d := NewVolumeDriver(name, pl.Client) |
| drivers.extensions[name] = d |
| return d, nil |
| } |