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Merge pull request #38 from lovoo/context-delete
deletion semantics
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| package storage | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "path/filepath" | ||
| ) | ||
|
|
||
| type file struct { | ||
| file io.WriteCloser | ||
| codec Codec | ||
| recovered bool | ||
|
|
||
| bytesWritten int64 | ||
| } | ||
|
|
||
| func NewFile(path string, part int32, codec Codec) (Storage, error) { | ||
| if err := os.MkdirAll(path, os.ModePerm); err != nil { | ||
| return nil, fmt.Errorf("error creating storage directory: %v", err) | ||
| } | ||
|
|
||
| f, err := os.OpenFile(filepath.Join(path, fmt.Sprintf("part-%d", part)), os.O_CREATE|os.O_RDWR|os.O_APPEND, os.ModePerm) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &file{file: f}, nil | ||
| } | ||
|
|
||
| func (f *file) Recovered() bool { | ||
| return f.recovered | ||
| } | ||
|
|
||
| func (f *file) MarkRecovered() error { | ||
| f.recovered = true | ||
| return nil | ||
| } | ||
|
|
||
| func (f *file) Has(key string) (bool, error) { | ||
| return false, nil | ||
| } | ||
|
|
||
| func (f *file) Get(key string) (interface{}, error) { | ||
| return nil, nil | ||
| } | ||
|
|
||
| func (f *file) Set(key string, val interface{}) error { | ||
| data, err := f.codec.Encode(val) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return f.SetEncoded(key, data) | ||
| } | ||
|
|
||
| func (f *file) SetEncoded(key string, val []byte) error { | ||
| num, err := f.file.Write(val) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| f.bytesWritten += int64(num) | ||
|
|
||
| if _, err := f.file.Write([]byte("\n")); err != nil { | ||
| return err | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
|
||
| func (f *file) Delete(string) error { | ||
| return nil | ||
| } | ||
|
|
||
| func (f *file) GetOffset(def int64) (int64, error) { | ||
| return def, nil | ||
| } | ||
|
|
||
| func (f *file) SetOffset(val int64) error { | ||
| return nil | ||
| } | ||
|
|
||
| func (f *file) Iterator() (Iterator, error) { | ||
| return new(NullIter), nil | ||
| } | ||
|
|
||
| func (f *file) Open() error { | ||
| return nil | ||
| } | ||
|
|
||
| func (f *file) Close() error { | ||
| return f.file.Close() | ||
| } | ||
|
|
||
| func (f *file) Sync() {} |