storj/pkg/storage/streams/passthrough.go

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// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.
package streams
import (
"context"
"io"
"time"
"storj.io/storj/pkg/paths"
"storj.io/storj/pkg/ranger"
"storj.io/storj/pkg/storage/segments"
)
// Passthrough implementation of stream store
type Passthrough struct {
Segments segments.Store
}
// NewPassthrough stream store
func NewPassthrough(s segments.Store) *Passthrough {
return &Passthrough{Segments: s}
}
var _ Store = (*Passthrough)(nil)
// Meta implements Store.Meta
func (p *Passthrough) Meta(ctx context.Context, path paths.Path) (Meta, error) {
m, err := p.Segments.Meta(ctx, path)
return convertMeta(m), err
}
// Get implements Store.Get
func (p *Passthrough) Get(ctx context.Context, path paths.Path) (
ranger.RangeCloser, Meta, error) {
rr, m, err := p.Segments.Get(ctx, path)
return rr, convertMeta(m), err
}
// Put implements Store.Put
func (p *Passthrough) Put(ctx context.Context, path paths.Path, data io.Reader,
metadata []byte, expiration time.Time) (Meta, error) {
m, err := p.Segments.Put(ctx, path, data, metadata, expiration)
return convertMeta(m), err
}
// Delete implements Store.Delete
func (p *Passthrough) Delete(ctx context.Context, path paths.Path) error {
return p.Segments.Delete(ctx, path)
}
// List implements Store.List
func (p *Passthrough) List(ctx context.Context,
prefix, startAfter, endBefore paths.Path, recursive bool, limit int,
metaFlags uint32) (items []ListItem, more bool, err error) {
segItems, more, err := p.Segments.List(ctx, prefix, startAfter, endBefore,
recursive, limit, metaFlags)
if err != nil {
return nil, false, nil
}
items = make([]ListItem, len(segItems))
for i, itm := range segItems {
items[i] = ListItem{
Path: itm.Path,
Meta: convertMeta(itm.Meta),
}
}
return items, more, nil
}
// convertMeta converts segment metadata to stream metadata
func convertMeta(m segments.Meta) Meta {
return Meta{
Modified: m.Modified,
Expiration: m.Expiration,
Size: m.Size,
Data: m.Data,
}
}