147 lines
3.5 KiB
Go
147 lines
3.5 KiB
Go
// Copyright (C) 2018 Storj Labs, Inc.
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// See LICENSE for copying information.
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package buckets
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import (
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"bytes"
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"context"
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"time"
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minio "github.com/minio/minio/cmd"
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"github.com/zeebo/errs"
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monkit "gopkg.in/spacemonkeygo/monkit.v2"
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"storj.io/storj/pkg/paths"
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"storj.io/storj/pkg/storage/meta"
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"storj.io/storj/pkg/storage/objects"
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"storj.io/storj/storage"
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)
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var mon = monkit.Package()
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// NoBucketError is an error class for missing bucket name
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var NoBucketError = errs.Class("no bucket specified")
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// Store creates an interface for interacting with buckets
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type Store interface {
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Get(ctx context.Context, bucket string) (meta Meta, err error)
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Put(ctx context.Context, bucket string) (meta Meta, err error)
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Delete(ctx context.Context, bucket string) (err error)
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List(ctx context.Context, startAfter, endBefore string, limit int) (items []ListItem, more bool, err error)
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GetObjectStore(ctx context.Context, bucketName string) (store objects.Store, err error)
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}
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// ListItem is a single item in a listing
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type ListItem struct {
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Bucket string
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Meta Meta
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}
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// BucketStore contains objects store
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type BucketStore struct {
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o objects.Store
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}
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// Meta is the bucket metadata struct
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type Meta struct {
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Created time.Time
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}
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// NewStore instantiates BucketStore
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func NewStore(obj objects.Store) Store {
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return &BucketStore{o: obj}
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}
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// GetObjectStore returns an implementation of objects.Store
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func (b *BucketStore) GetObjectStore(ctx context.Context, bucket string) (objects.Store, error) {
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if bucket == "" {
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return nil, NoBucketError.New("")
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}
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_, err := b.Get(ctx, bucket)
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if err != nil {
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if storage.ErrKeyNotFound.Has(err) {
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return nil, minio.BucketNotFound{Bucket: bucket}
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}
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return nil, err
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}
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prefixed := prefixedObjStore{
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o: b.o,
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prefix: bucket,
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}
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return &prefixed, nil
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}
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// Get calls objects store Get
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func (b *BucketStore) Get(ctx context.Context, bucket string) (meta Meta, err error) {
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defer mon.Task()(&ctx)(&err)
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if bucket == "" {
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return Meta{}, NoBucketError.New("")
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}
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p := paths.New(bucket)
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objMeta, err := b.o.Meta(ctx, p)
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if err != nil {
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return Meta{}, err
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}
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return convertMeta(objMeta), nil
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}
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// Put calls objects store Put
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func (b *BucketStore) Put(ctx context.Context, bucket string) (meta Meta, err error) {
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defer mon.Task()(&ctx)(&err)
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if bucket == "" {
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return Meta{}, NoBucketError.New("")
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}
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p := paths.New(bucket)
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r := bytes.NewReader(nil)
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var exp time.Time
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m, err := b.o.Put(ctx, p, r, objects.SerializableMeta{}, exp)
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if err != nil {
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return Meta{}, err
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}
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return convertMeta(m), nil
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}
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// Delete calls objects store Delete
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func (b *BucketStore) Delete(ctx context.Context, bucket string) (err error) {
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defer mon.Task()(&ctx)(&err)
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if bucket == "" {
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return NoBucketError.New("")
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}
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p := paths.New(bucket)
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return b.o.Delete(ctx, p)
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}
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// List calls objects store List
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func (b *BucketStore) List(ctx context.Context, startAfter, endBefore string, limit int) (
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items []ListItem, more bool, err error) {
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defer mon.Task()(&ctx)(&err)
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objItems, more, err := b.o.List(ctx, nil, paths.New(startAfter), paths.New(endBefore), false, limit, meta.Modified)
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if err != nil {
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return items, more, err
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}
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items = make([]ListItem, 0, len(objItems))
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for _, itm := range objItems {
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if itm.IsPrefix {
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continue
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}
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items = append(items, ListItem{
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Bucket: itm.Path.String(),
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Meta: convertMeta(itm.Meta),
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})
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}
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return items, more, nil
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}
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// convertMeta converts stream metadata to object metadata
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func convertMeta(m objects.Meta) Meta {
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return Meta{
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Created: m.Modified,
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}
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}
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