mirror of
https://github.com/octoleo/restic.git
synced 2024-12-23 03:18:55 +00:00
backend: remove unused ErrorBackend
This commit is contained in:
parent
8c18c65b3b
commit
32603d49c4
@ -1,84 +0,0 @@
|
|||||||
package backend
|
|
||||||
|
|
||||||
import (
|
|
||||||
"context"
|
|
||||||
"io"
|
|
||||||
"io/ioutil"
|
|
||||||
"math/rand"
|
|
||||||
"sync"
|
|
||||||
|
|
||||||
"github.com/restic/restic/internal/errors"
|
|
||||||
"github.com/restic/restic/internal/restic"
|
|
||||||
)
|
|
||||||
|
|
||||||
// ErrorBackend is used to induce errors into various function calls and test
|
|
||||||
// the retry functions.
|
|
||||||
type ErrorBackend struct {
|
|
||||||
FailSave float32
|
|
||||||
FailSaveRead float32
|
|
||||||
FailLoad float32
|
|
||||||
FailStat float32
|
|
||||||
restic.Backend
|
|
||||||
|
|
||||||
r *rand.Rand
|
|
||||||
m sync.Mutex
|
|
||||||
}
|
|
||||||
|
|
||||||
// statically ensure that ErrorBackend implements restic.Backend.
|
|
||||||
var _ restic.Backend = &ErrorBackend{}
|
|
||||||
|
|
||||||
// NewErrorBackend wraps be with a backend that returns errors according to
|
|
||||||
// given probabilities.
|
|
||||||
func NewErrorBackend(be restic.Backend, seed int64) *ErrorBackend {
|
|
||||||
return &ErrorBackend{
|
|
||||||
Backend: be,
|
|
||||||
r: rand.New(rand.NewSource(seed)),
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
func (be *ErrorBackend) fail(p float32) bool {
|
|
||||||
be.m.Lock()
|
|
||||||
v := be.r.Float32()
|
|
||||||
be.m.Unlock()
|
|
||||||
|
|
||||||
return v < p
|
|
||||||
}
|
|
||||||
|
|
||||||
// Save stores the data in the backend under the given handle.
|
|
||||||
func (be *ErrorBackend) Save(ctx context.Context, h restic.Handle, rd restic.RewindReader) error {
|
|
||||||
if be.fail(be.FailSave) {
|
|
||||||
return errors.Errorf("Save(%v) random error induced", h)
|
|
||||||
}
|
|
||||||
|
|
||||||
if be.fail(be.FailSaveRead) {
|
|
||||||
_, err := io.CopyN(ioutil.Discard, rd, be.r.Int63n(1000))
|
|
||||||
if err != nil {
|
|
||||||
return err
|
|
||||||
}
|
|
||||||
|
|
||||||
return errors.Errorf("Save(%v) random error with partial read induced", h)
|
|
||||||
}
|
|
||||||
|
|
||||||
return be.Backend.Save(ctx, h, rd)
|
|
||||||
}
|
|
||||||
|
|
||||||
// Load returns a reader that yields the contents of the file at h at the
|
|
||||||
// given offset. If length is larger than zero, only a portion of the file
|
|
||||||
// is returned. rd must be closed after use. If an error is returned, the
|
|
||||||
// ReadCloser must be nil.
|
|
||||||
func (be *ErrorBackend) Load(ctx context.Context, h restic.Handle, length int, offset int64, consumer func(rd io.Reader) error) error {
|
|
||||||
if be.fail(be.FailLoad) {
|
|
||||||
return errors.Errorf("Load(%v, %v, %v) random error induced", h, length, offset)
|
|
||||||
}
|
|
||||||
|
|
||||||
return be.Backend.Load(ctx, h, length, offset, consumer)
|
|
||||||
}
|
|
||||||
|
|
||||||
// Stat returns information about the File identified by h.
|
|
||||||
func (be *ErrorBackend) Stat(ctx context.Context, h restic.Handle) (restic.FileInfo, error) {
|
|
||||||
if be.fail(be.FailLoad) {
|
|
||||||
return restic.FileInfo{}, errors.Errorf("Stat(%v) random error induced", h)
|
|
||||||
}
|
|
||||||
|
|
||||||
return be.Stat(ctx, h)
|
|
||||||
}
|
|
Loading…
Reference in New Issue
Block a user