mirror of https://github.com/minio/minio.git
72 lines
2.1 KiB
Go
72 lines
2.1 KiB
Go
package donutbox
|
|
|
|
import "io"
|
|
|
|
// DonutBox is an interface specifying how the storage driver should interact with its underlying system.
|
|
type DonutBox interface {
|
|
// system operations
|
|
ListBuckets() ([]string, error)
|
|
|
|
// bucket operations
|
|
CreateBucket(bucket string) error
|
|
ListObjectsInBucket(bucket, prefix string) ([]string, error)
|
|
GetBucketMetadata(bucket string) (map[string]string, error)
|
|
SetBucketMetadata(bucket string, metadata map[string]string) error
|
|
|
|
// object operations
|
|
GetObjectWriter(bucket, object string, column, blockSize uint) (*NewObject, error)
|
|
GetObjectReader(bucket, object string, column uint) (io.Reader, error)
|
|
GetObjectMetadata(bucket, object string, column uint) (map[string]string, error)
|
|
}
|
|
|
|
// Result is a result for async tasks
|
|
type Result struct {
|
|
Err error
|
|
}
|
|
|
|
// CreateNewObject creates a new object wrapping a writer. Clients are not expected to use this directly. This is exposed for storage drivers.
|
|
func CreateNewObject(writer *io.PipeWriter) *NewObject {
|
|
return &NewObject{writer: writer}
|
|
}
|
|
|
|
// NewObject wraps a writer and allows setting metadata. On a successful close, the object is committed by the backend.
|
|
type NewObject struct {
|
|
metadata map[string]string
|
|
writer *io.PipeWriter
|
|
}
|
|
|
|
// Write data
|
|
func (newObject *NewObject) Write(data []byte) (int, error) {
|
|
return newObject.writer.Write(data)
|
|
}
|
|
|
|
// SetMetadata sets metadata for an object
|
|
func (newObject *NewObject) SetMetadata(metadata map[string]string) {
|
|
newMetadata := make(map[string]string)
|
|
for k, v := range metadata {
|
|
newMetadata[k] = v
|
|
}
|
|
newObject.metadata = newMetadata
|
|
}
|
|
|
|
// Close and commit the object
|
|
func (newObject *NewObject) Close() error {
|
|
return newObject.writer.Close()
|
|
}
|
|
|
|
// CloseWithError closes the object with an error, causing the backend to abandon the object
|
|
func (newObject *NewObject) CloseWithError(err error) error {
|
|
return newObject.writer.CloseWithError(err)
|
|
}
|
|
|
|
// GetMetadata returns a copy of the metadata set metadata
|
|
func (newObject *NewObject) GetMetadata() map[string]string {
|
|
newMetadata := make(map[string]string)
|
|
if newMetadata != nil {
|
|
for k, v := range newObject.metadata {
|
|
newMetadata[k] = v
|
|
}
|
|
}
|
|
return newMetadata
|
|
}
|