1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
moby--moby/volume/drivers/extpoint.go
David Calavera d592778f4a Propagate unmount events to the external volume drivers.
Signed-off-by: David Calavera <david.calavera@gmail.com>
2015-05-22 16:43:34 -07:00

61 lines
1.2 KiB
Go

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
}