harness-drone/remote/cache.go
2016-04-29 12:39:56 -07:00

85 lines
2 KiB
Go

package remote
import (
"time"
"github.com/drone/drone/model"
)
// WithCache returns a the parent Remote with a front-end Cache. Remote items
// are cached for duration d.
func WithCache(r Remote, d time.Duration) Remote {
return r
}
// Cacher implements purge functionality so that we can evict stale data and
// force a refresh. The indended use case is when the repository list is out
// of date and requires manual refresh.
type Cacher interface {
Purge(*model.User)
}
// Because the cache is so closely tied to the remote we should just include
// them in the same package together. The below code are stubs for merging
// the Cache with the Remote package.
type cache struct {
Remote
}
func (c *cache) Repos(u *model.User) ([]*model.RepoLite, error) {
// key := fmt.Sprintf("repos:%s",
// user.Login,
// )
// // if we fetch from the cache we can return immediately
// val, err := Get(c, key)
// if err == nil {
// return val.([]*model.RepoLite), nil
// }
// // else we try to grab from the remote system and
// // populate our cache.
// repos, err := remote.Repos(c, user)
// if err != nil {
// return nil, err
// }
//
// Set(c, key, repos)
// return repos, nil
return nil, nil
}
func (c *cache) Perm(u *model.User, owner, repo string) (*model.Perm, error) {
// key := fmt.Sprintf("perms:%s:%s/%s",
// user.Login,
// owner,
// name,
// )
// // if we fetch from the cache we can return immediately
// val, err := Get(c, key)
// if err == nil {
// return val.(*model.Perm), nil
// }
// // else we try to grab from the remote system and
// // populate our cache.
// perm, err := remote.Perm(c, user, owner, name)
// if err != nil {
// return nil, err
// }
// Set(c, key, perm)
// return perm, nil
return nil, nil
}
func (c *cache) Purge(*model.User) {
return
}
func (c *cache) Refresh(u *model.User) (bool, error) {
if r, ok := c.Remote.(Refresher); ok {
return r.Refresh(u)
}
return false, nil
}
var _ Remote = &cache{}
var _ Refresher = &cache{}