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backend: Remove Get()

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This is the first commit that removes the (redundant) Get() method of
the backend interface. Get(x, y) is equivalent to GetReader(x, y, 0, 0).
This commit is contained in:
Alexander Neumann 2016-01-23 13:13:05 +01:00
parent d3a6e2a991
commit 8b7bf8691d
12 changed files with 12 additions and 105 deletions
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18
backend/backend_test.go
View File

@ -17,7 +17,7 @@ import (
func testBackendConfig(b backend.Backend, t *testing.T) {
// create config and read it back
_, err := b.Get(backend.Config, "")
_, err := b.GetReader(backend.Config, "", 0, 0)
Assert(t, err != nil, "did not get expected error for non-existing config")
blob, err := b.Create()
@ -30,7 +30,7 @@ func testBackendConfig(b backend.Backend, t *testing.T) {
// try accessing the config with different names, should all return the
// same config
for _, name := range []string{"", "foo", "bar", "0000000000000000000000000000000000000000000000000000000000000000"} {
rd, err := b.Get(backend.Config, name)
rd, err := b.GetReader(backend.Config, name, 0, 0)
Assert(t, err == nil, "unable to read config")
buf, err := ioutil.ReadAll(rd)
@ -116,7 +116,7 @@ func testWrite(b backend.Backend, t testing.TB) {
name := fmt.Sprintf("%s-%d", id, i)
OK(t, blob.Finalize(backend.Data, name))
rd, err := b.Get(backend.Data, name)
rd, err := b.GetReader(backend.Data, name, 0, 0)
OK(t, err)
buf, err := ioutil.ReadAll(rd)
@ -169,7 +169,7 @@ func testBackend(b backend.Backend, t *testing.T) {
Assert(t, !ret, "blob was found to exist before creating")
// try to open not existing blob
_, err = b.Get(tpe, id.String())
_, err = b.GetReader(tpe, id.String(), 0, 0)
Assert(t, err != nil, "blob data could be extracted before creation")
// try to read not existing blob
@ -186,16 +186,8 @@ func testBackend(b backend.Backend, t *testing.T) {
for _, test := range TestStrings {
store(t, b, tpe, []byte(test.data))
// test Get()
rd, err := b.Get(tpe, test.id)
OK(t, err)
Assert(t, rd != nil, "Get() returned nil")
read(t, rd, []byte(test.data))
OK(t, rd.Close())
// test GetReader()
rd, err = b.GetReader(tpe, test.id, 0, uint(len(test.data)))
rd, err := b.GetReader(tpe, test.id, 0, uint(len(test.data)))
OK(t, err)
Assert(t, rd != nil, "GetReader() returned nil")

3
backend/interface.go
View File

@ -42,9 +42,6 @@ type Backend interface {
// has been called on the returned Blob.
Create() (Blob, error)
// Get returns an io.ReadCloser for the Blob with the given name of type t.
Get(t Type, name string) (io.ReadCloser, error)
// GetReader returns an io.ReadCloser for the Blob with the given name of
// type t at offset and length.
GetReader(t Type, name string, offset, length uint) (io.ReadCloser, error)

14
backend/local/local.go
View File

@ -196,20 +196,6 @@ func dirname(base string, t backend.Type, name string) string {
return filepath.Join(base, n)
}
// Get returns a reader that yields the content stored under the given
// name. The reader should be closed after draining it.
func (b *Local) Get(t backend.Type, name string) (io.ReadCloser, error) {
file, err := os.Open(filename(b.p, t, name))
if err != nil {
return nil, err
}
b.mu.Lock()
open, _ := b.open[filename(b.p, t, name)]
b.open[filename(b.p, t, name)] = append(open, file)
b.mu.Unlock()
return file, nil
}
// GetReader returns an io.ReadCloser for the Blob with the given name of
// type t at offset and length. If length is 0, the reader reads until EOF.
func (b *Local) GetReader(t backend.Type, name string, offset, length uint) (io.ReadCloser, error) {

21
backend/mem_backend.go
View File

@ -41,10 +41,6 @@ func NewMemoryBackend() *MemoryBackend {
return memCreate(be)
}
be.MockBackend.GetFn = func(t Type, name string) (io.ReadCloser, error) {
return memGet(be, t, name)
}
be.MockBackend.GetReaderFn = func(t Type, name string, offset, length uint) (io.ReadCloser, error) {
return memGetReader(be, t, name, offset, length)
}
@ -143,23 +139,6 @@ func (rd readCloser) Close() error {
return nil
}
func memGet(be *MemoryBackend, t Type, name string) (io.ReadCloser, error) {
be.m.Lock()
defer be.m.Unlock()
if t == Config {
name = ""
}
debug.Log("MemoryBackend.Get", "get %v %v", t, name)
if _, ok := be.data[entry{t, name}]; !ok {
return nil, errors.New("no such data")
}
return readCloser{bytes.NewReader(be.data[entry{t, name}])}, nil
}
func memGetReader(be *MemoryBackend, t Type, name string, offset, length uint) (io.ReadCloser, error) {
be.m.Lock()
defer be.m.Unlock()

9
backend/mock_backend.go
View File

@ -10,7 +10,6 @@ import (
type MockBackend struct {
CloseFn func() error
CreateFn func() (Blob, error)
GetFn func(Type, string) (io.ReadCloser, error)
GetReaderFn func(Type, string, uint, uint) (io.ReadCloser, error)
ListFn func(Type, <-chan struct{}) <-chan string
RemoveFn func(Type, string) error
@ -43,14 +42,6 @@ func (m *MockBackend) Create() (Blob, error) {
return m.CreateFn()
}
func (m *MockBackend) Get(t Type, name string) (io.ReadCloser, error) {
if m.GetFn == nil {
return nil, errors.New("not implemented")
}
return m.GetFn(t, name)
}
func (m *MockBackend) GetReader(t Type, name string, offset, len uint) (io.ReadCloser, error) {
if m.GetReaderFn == nil {
return nil, errors.New("not implemented")

13
backend/s3/s3.go
View File

@ -145,19 +145,6 @@ func (be *S3Backend) Create() (backend.Blob, error) {
return &blob, nil
}
// Get returns a reader that yields the content stored under the given
// name. The reader should be closed after draining it.
func (be *S3Backend) Get(t backend.Type, name string) (io.ReadCloser, error) {
path := s3path(t, name)
rc, err := be.client.GetObject(be.bucketname, path)
debug.Log("s3.Get", "%v %v -> err %v", t, name, err)
if err != nil {
return nil, err
}
return rc, nil
}
// GetReader returns an io.ReadCloser for the Blob with the given name of
// type t at offset and length. If length is 0, the reader reads until EOF.
func (be *S3Backend) GetReader(t backend.Type, name string, offset, length uint) (io.ReadCloser, error) {

12
backend/sftp/sftp.go
View File

@ -344,18 +344,6 @@ func (r *SFTP) dirname(t backend.Type, name string) string {
return Join(r.p, n)
}
// Get returns a reader that yields the content stored under the given
// name. The reader should be closed after draining it.
func (r *SFTP) Get(t backend.Type, name string) (io.ReadCloser, error) {
// try to open file
file, err := r.c.Open(r.filename(t, name))
if err != nil {
return nil, err
}
return file, nil
}
// GetReader returns an io.ReadCloser for the Blob with the given name of
// type t at offset and length. If length is 0, the reader reads until EOF.
func (r *SFTP) GetReader(t backend.Type, name string, offset, length uint) (io.ReadCloser, error) {

2
checker/checker.go
View File

@ -647,7 +647,7 @@ func (c *Checker) CountPacks() uint64 {
// checkPack reads a pack and checks the integrity of all blobs.
func checkPack(r *repository.Repository, id backend.ID) error {
debug.Log("Checker.checkPack", "checking pack %v", id.Str())
rd, err := r.Backend().Get(backend.Data, id.String())
rd, err := r.Backend().GetReader(backend.Data, id.String(), 0, 0)
if err != nil {
return err
}

13
checker/checker_test.go
View File

@ -214,19 +214,6 @@ type errorBackend struct {
backend.Backend
}
func (b errorBackend) Get(t backend.Type, name string) (io.ReadCloser, error) {
rd, err := b.Backend.Get(t, name)
if err != nil {
return rd, err
}
if t != backend.Data {
return rd, err
}
return backend.ReadCloser(faultReader{rd}), nil
}
func (b errorBackend) GetReader(t backend.Type, name string, offset, length uint) (io.ReadCloser, error) {
rd, err := b.Backend.GetReader(t, name, offset, length)
if err != nil {

4
cmd/restic/cmd_cat.go
View File

@ -101,7 +101,7 @@ func (cmd CmdCat) Execute(args []string) error {
return nil
case "key":
rd, err := repo.Backend().Get(backend.Key, id.String())
rd, err := repo.Backend().GetReader(backend.Key, id.String(), 0, 0)
if err != nil {
return err
}
@ -153,7 +153,7 @@ func (cmd CmdCat) Execute(args []string) error {
switch tpe {
case "pack":
rd, err := repo.Backend().Get(backend.Data, id.String())
rd, err := repo.Backend().GetReader(backend.Data, id.String(), 0, 0)
if err != nil {
return err
}

2
repository/key.go
View File

@ -120,7 +120,7 @@ func SearchKey(s *Repository, password string) (*Key, error) {
// LoadKey loads a key from the backend.
func LoadKey(s *Repository, name string) (k *Key, err error) {
// extract data from repo
rd, err := s.be.Get(backend.Key, name)
rd, err := s.be.GetReader(backend.Key, name, 0, 0)
if err != nil {
return nil, err
}

6
repository/repository.go
View File

@ -56,7 +56,7 @@ func (r *Repository) PrefixLength(t backend.Type) (int, error) {
func (r *Repository) LoadAndDecrypt(t backend.Type, id backend.ID) ([]byte, error) {
debug.Log("Repo.Load", "load %v with id %v", t, id.Str())
rd, err := r.be.Get(t, id.String())
rd, err := r.be.GetReader(t, id.String(), 0, 0)
if err != nil {
debug.Log("Repo.Load", "error loading %v: %v", id.Str(), err)
return nil, err
@ -157,7 +157,7 @@ func closeOrErr(cl io.Closer, err *error) {
// the item.
func (r *Repository) LoadJSONUnpacked(t backend.Type, id backend.ID, item interface{}) (err error) {
// load blob from backend
rd, err := r.be.Get(t, id.String())
rd, err := r.be.GetReader(t, id.String(), 0, 0)
if err != nil {
return err
}
@ -548,7 +548,7 @@ func LoadIndex(repo *Repository, id string) (*Index, error) {
// GetDecryptReader opens the file id stored in the backend and returns a
// reader that yields the decrypted content. The reader must be closed.
func (r *Repository) GetDecryptReader(t backend.Type, id string) (io.ReadCloser, error) {
rd, err := r.be.Get(t, id)
rd, err := r.be.GetReader(t, id, 0, 0)
if err != nil {
return nil, err
}