Adding interfaces for donut driver

master
Frederick F. Kautz IV 10 years ago
parent bf86e78714
commit 2c69433588
  1. 45
      pkg/storage/donut/donut.go
  2. 48
      pkg/storage/donut/donutdriver.go

@ -0,0 +1,45 @@
package donut
import "io"
// INTERFACES
// Donut interface
type Donut interface {
CreateBucket(bucket string) error
GetBuckets() ([]string, error)
GetObject(bucket, object string) (io.ReadCloser, error)
GetObjectMetadata(bucket, object string) (map[string]string, error)
GetObjectWriter(bucket, object string) (ObjectWriter, error)
}
// Bucket is an interface for managing buckets
type Bucket interface {
GetObject(object string) (io.Reader, error)
GetObjectMetadata(object string) (map[string]string, error)
GetObjectWriter(object string) (ObjectWriter, error)
GetObjects() ([]string, error)
}
// Disk is an interface for managing disks
type Disk interface {
GetBuckets(object string) ([]string, error)
}
// ObjectWriter is an interface for writing new objects
type ObjectWriter interface {
Write([]byte) error
Close() error
CloseWithError(error) error
SetMetadata(map[string]string)
GetMetadata() map[string]string
}
// InternalObjectWriter is an interface for use internally to donut
type InternalObjectWriter interface {
ObjectWriter
SetDonutMetadata(map[string]string)
GetDonutMetadata() map[string]string
}

@ -0,0 +1,48 @@
package donut
import (
"errors"
"io"
)
type donutDriver struct {
buckets map[string]Bucket
disks map[string]Disk
}
// NewDonutDriver instantiates a donut driver for use in object storage
func NewDonutDriver() Donut {
return donutDriver{
buckets: make(map[string]Bucket),
disks: make(map[string]Disk),
}
}
func notImplemented() error {
return errors.New("Not Implemented")
}
// CreateBucket creates a bucket
func (driver donutDriver) CreateBucket(bucket string) error {
return notImplemented()
}
// GetBuckets returns a list of buckets
func (driver donutDriver) GetBuckets() ([]string, error) {
return nil, notImplemented()
}
// GetObject returns an object
func (driver donutDriver) GetObject(bucket, object string) (io.ReadCloser, error) {
return nil, notImplemented()
}
// GetObjectMetadata returns object metadata
func (driver donutDriver) GetObjectMetadata(bucket, object string) (map[string]string, error) {
return nil, notImplemented()
}
// GetObjectWriter returns a writer for creating a new object.
func (driver donutDriver) GetObjectWriter(bucket, object string) (ObjectWriter, error) {
return nil, notImplemented()
}
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