116 lines
3.2 KiB
Go
116 lines
3.2 KiB
Go
package policy
|
|
|
|
import (
|
|
"context"
|
|
"math"
|
|
|
|
"github.com/rclone/rclone/backend/union/upstream"
|
|
"github.com/rclone/rclone/fs"
|
|
)
|
|
|
|
func init() {
|
|
registerPolicy("eplus", &EpLus{})
|
|
}
|
|
|
|
// EpLus stands for existing path, least used space
|
|
// Of all the candidates on which the path exists choose the one with the least used space.
|
|
type EpLus struct {
|
|
EpAll
|
|
}
|
|
|
|
func (p *EpLus) lus(upstreams []*upstream.Fs) (*upstream.Fs, error) {
|
|
var minUsedSpace int64 = math.MaxInt64
|
|
var lusupstream *upstream.Fs
|
|
for _, u := range upstreams {
|
|
space, err := u.GetUsedSpace()
|
|
if err != nil {
|
|
fs.LogPrintf(fs.LogLevelNotice, nil,
|
|
"Used Space is not supported for upstream %s, treating as 0", u.Name())
|
|
}
|
|
if space < minUsedSpace {
|
|
minUsedSpace = space
|
|
lusupstream = u
|
|
}
|
|
}
|
|
if lusupstream == nil {
|
|
return nil, fs.ErrorObjectNotFound
|
|
}
|
|
return lusupstream, nil
|
|
}
|
|
|
|
func (p *EpLus) lusEntries(entries []upstream.Entry) (upstream.Entry, error) {
|
|
var minUsedSpace int64 = math.MaxInt64
|
|
var lusEntry upstream.Entry
|
|
for _, e := range entries {
|
|
space, err := e.UpstreamFs().GetUsedSpace()
|
|
if err != nil {
|
|
fs.LogPrintf(fs.LogLevelNotice, nil,
|
|
"Used Space is not supported for upstream %s, treating as 0", e.UpstreamFs().Name())
|
|
}
|
|
if space < minUsedSpace {
|
|
minUsedSpace = space
|
|
lusEntry = e
|
|
}
|
|
}
|
|
return lusEntry, nil
|
|
}
|
|
|
|
// Action category policy, governing the modification of files and directories
|
|
func (p *EpLus) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error) {
|
|
upstreams, err := p.EpAll.Action(ctx, upstreams, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
u, err := p.lus(upstreams)
|
|
return []*upstream.Fs{u}, err
|
|
}
|
|
|
|
// ActionEntries is ACTION category policy but receiving a set of candidate entries
|
|
func (p *EpLus) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error) {
|
|
entries, err := p.EpAll.ActionEntries(entries...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
e, err := p.lusEntries(entries)
|
|
return []upstream.Entry{e}, err
|
|
}
|
|
|
|
// Create category policy, governing the creation of files and directories
|
|
func (p *EpLus) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error) {
|
|
upstreams, err := p.EpAll.Create(ctx, upstreams, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
u, err := p.lus(upstreams)
|
|
return []*upstream.Fs{u}, err
|
|
}
|
|
|
|
// CreateEntries is CREATE category policy but receiving a set of candidate entries
|
|
func (p *EpLus) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error) {
|
|
entries, err := p.EpAll.CreateEntries(entries...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
e, err := p.lusEntries(entries)
|
|
return []upstream.Entry{e}, err
|
|
}
|
|
|
|
// Search category policy, governing the access to files and directories
|
|
func (p *EpLus) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error) {
|
|
if len(upstreams) == 0 {
|
|
return nil, fs.ErrorObjectNotFound
|
|
}
|
|
upstreams, err := p.epall(ctx, upstreams, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return p.lus(upstreams)
|
|
}
|
|
|
|
// SearchEntries is SEARCH category policy but receiving a set of candidate entries
|
|
func (p *EpLus) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error) {
|
|
if len(entries) == 0 {
|
|
return nil, fs.ErrorObjectNotFound
|
|
}
|
|
return p.lusEntries(entries)
|
|
}
|