TrueCloudLab/restic
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move Backend interface to backend package

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This commit is contained in:
Michael Eischer 2023-10-01 11:40:12 +02:00
parent ceb0774af1
commit 1b8a67fe76
105 changed files with 822 additions and 775 deletions
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28
internal/backend/sema/backend.go
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@ -6,22 +6,22 @@ import (
"sync"
"github.com/cenkalti/backoff/v4"
"github.com/restic/restic/internal/backend"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/restic"
)
// make sure that connectionLimitedBackend implements restic.Backend
var _ restic.Backend = &connectionLimitedBackend{}
// make sure that connectionLimitedBackend implements backend.Backend
var _ backend.Backend = &connectionLimitedBackend{}
// connectionLimitedBackend limits the number of concurrent operations.
type connectionLimitedBackend struct {
restic.Backend
backend.Backend
sem semaphore
freezeLock sync.Mutex
}
// NewBackend creates a backend that limits the concurrent operations on the underlying backend
func NewBackend(be restic.Backend) restic.Backend {
func NewBackend(be backend.Backend) backend.Backend {
sem, err := newSemaphore(be.Connections())
if err != nil {
panic(err)
@ -35,9 +35,9 @@ func NewBackend(be restic.Backend) restic.Backend {
// typeDependentLimit acquire a token unless the FileType is a lock file. The returned function
// must be called to release the token.
func (be *connectionLimitedBackend) typeDependentLimit(t restic.FileType) func() {
func (be *connectionLimitedBackend) typeDependentLimit(t backend.FileType) func() {
// allow concurrent lock file operations to ensure that the lock refresh is always possible
if t == restic.LockFile {
if t == backend.LockFile {
return func() {}
}
be.sem.GetToken()
@ -59,7 +59,7 @@ func (be *connectionLimitedBackend) Unfreeze() {
}
// Save adds new Data to the backend.
func (be *connectionLimitedBackend) Save(ctx context.Context, h restic.Handle, rd restic.RewindReader) error {
func (be *connectionLimitedBackend) Save(ctx context.Context, h backend.Handle, rd backend.RewindReader) error {
if err := h.Valid(); err != nil {
return backoff.Permanent(err)
}
@ -75,7 +75,7 @@ func (be *connectionLimitedBackend) Save(ctx context.Context, h restic.Handle, r
// Load runs fn with a reader that yields the contents of the file at h at the
// given offset.
func (be *connectionLimitedBackend) Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
func (be *connectionLimitedBackend) Load(ctx context.Context, h backend.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
if err := h.Valid(); err != nil {
return backoff.Permanent(err)
}
@ -96,22 +96,22 @@ func (be *connectionLimitedBackend) Load(ctx context.Context, h restic.Handle, l
}
// Stat returns information about a file in the backend.
func (be *connectionLimitedBackend) Stat(ctx context.Context, h restic.Handle) (restic.FileInfo, error) {
func (be *connectionLimitedBackend) Stat(ctx context.Context, h backend.Handle) (backend.FileInfo, error) {
if err := h.Valid(); err != nil {
return restic.FileInfo{}, backoff.Permanent(err)
return backend.FileInfo{}, backoff.Permanent(err)
}
defer be.typeDependentLimit(h.Type)()
if ctx.Err() != nil {
return restic.FileInfo{}, ctx.Err()
return backend.FileInfo{}, ctx.Err()
}
return be.Backend.Stat(ctx, h)
}
// Remove deletes a file from the backend.
func (be *connectionLimitedBackend) Remove(ctx context.Context, h restic.Handle) error {
func (be *connectionLimitedBackend) Remove(ctx context.Context, h backend.Handle) error {
if err := h.Valid(); err != nil {
return backoff.Permanent(err)
}
@ -125,6 +125,6 @@ func (be *connectionLimitedBackend) Remove(ctx context.Context, h restic.Handle)
return be.Backend.Remove(ctx, h)
}
func (be *connectionLimitedBackend) Unwrap() restic.Backend {
func (be *connectionLimitedBackend) Unwrap() backend.Backend {
return be.Backend
}