rclone/backend/union/policy/epmfs.go
Josh Soref d0888edc0a Spelling fixes
Fix spelling of: above, already, anonymous, associated,
authentication, bandwidth, because, between, blocks, calculate,
candidates, cautious, changelog, cleaner, clipboard, command,
completely, concurrently, considered, constructs, corrupt, current,
daemon, dependencies, deprecated, directory, dispatcher, download,
eligible, ellipsis, encrypter, endpoint, entrieslist, essentially,
existing writers, existing, expires, filesystem, flushing, frequently,
hierarchy, however, implementation, implements, inaccurate,
individually, insensitive, longer, maximum, metadata, modified,
multipart, namedirfirst, nextcloud, obscured, opened, optional,
owncloud, pacific, passphrase, password, permanently, persimmon,
positive, potato, protocol, quota, receiving, recommends, referring,
requires, revisited, satisfied, satisfies, satisfy, semver,
serialized, session, storage, strategies, stringlist, successful,
supported, surprise, temporarily, temporary, transactions, unneeded,
update, uploads, wrapped

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
2020-10-14 15:21:31 +01:00

116 lines
3.2 KiB
Go

package policy
import (
"context"
"github.com/rclone/rclone/backend/union/upstream"
"github.com/rclone/rclone/fs"
)
func init() {
registerPolicy("epmfs", &EpMfs{})
}
// EpMfs stands for existing path, most free space
// Of all the candidates on which the path exists choose the one with the most free space.
type EpMfs struct {
EpAll
}
func (p *EpMfs) mfs(upstreams []*upstream.Fs) (*upstream.Fs, error) {
var maxFreeSpace int64
var mfsupstream *upstream.Fs
for _, u := range upstreams {
space, err := u.GetFreeSpace()
if err != nil {
fs.LogPrintf(fs.LogLevelNotice, nil,
"Free Space is not supported for upstream %s, treating as infinite", u.Name())
}
if maxFreeSpace < space {
maxFreeSpace = space
mfsupstream = u
}
}
if mfsupstream == nil {
return nil, fs.ErrorObjectNotFound
}
return mfsupstream, nil
}
func (p *EpMfs) mfsEntries(entries []upstream.Entry) (upstream.Entry, error) {
var maxFreeSpace int64
var mfsEntry upstream.Entry
for _, e := range entries {
space, err := e.UpstreamFs().GetFreeSpace()
if err != nil {
fs.LogPrintf(fs.LogLevelNotice, nil,
"Free Space is not supported for upstream %s, treating as infinite", e.UpstreamFs().Name())
}
if maxFreeSpace < space {
maxFreeSpace = space
mfsEntry = e
}
}
return mfsEntry, nil
}
// Action category policy, governing the modification of files and directories
func (p *EpMfs) 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.mfs(upstreams)
return []*upstream.Fs{u}, err
}
// ActionEntries is ACTION category policy but receiving a set of candidate entries
func (p *EpMfs) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error) {
entries, err := p.EpAll.ActionEntries(entries...)
if err != nil {
return nil, err
}
e, err := p.mfsEntries(entries)
return []upstream.Entry{e}, err
}
// Create category policy, governing the creation of files and directories
func (p *EpMfs) 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.mfs(upstreams)
return []*upstream.Fs{u}, err
}
// CreateEntries is CREATE category policy but receiving a set of candidate entries
func (p *EpMfs) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error) {
entries, err := p.EpAll.CreateEntries(entries...)
if err != nil {
return nil, err
}
e, err := p.mfsEntries(entries)
return []upstream.Entry{e}, err
}
// Search category policy, governing the access to files and directories
func (p *EpMfs) 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.mfs(upstreams)
}
// SearchEntries is SEARCH category policy but receiving a set of candidate entries
func (p *EpMfs) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error) {
if len(entries) == 0 {
return nil, fs.ErrorObjectNotFound
}
return p.mfsEntries(entries)
}