814e3126fa
The main motivation is to wrap the bucket DB and metainfo DB, so we could check if a bucket is empty before applying geofencing config. Change-Id: I8bac21555e01d51a663fb557bc1acfc8106bc2e1
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// Copyright (C) 2021 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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"context"
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"github.com/zeebo/errs"
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"storj.io/common/storj"
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"storj.io/storj/satellite/metabase"
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)
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var (
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// ErrBucketNotEmpty is returned when a caller attempts to change placement constraints.
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ErrBucketNotEmpty = errs.Class("bucket must be empty")
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)
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// NewService converts the provided db and metabase calls into a single DB interface.
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func NewService(bucketsDB DB, metabase *metabase.DB) *Service {
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return &Service{
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DB: bucketsDB,
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metabase: metabase,
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}
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}
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// Service encapsulates operations around buckets.
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type Service struct {
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DB
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metabase *metabase.DB
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}
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// UpdateBucket overrides the default UpdateBucket behaviour by adding a check against MetabaseDB to ensure the bucket
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// is empty before attempting to change the placement constraint of a bucket. If the placement constraint is not being
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// changed, then this additional check is skipped.
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func (buckets *Service) UpdateBucket(ctx context.Context, bucket storj.Bucket) (storj.Bucket, error) {
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current, err := buckets.GetBucket(ctx, []byte(bucket.Name), bucket.ProjectID)
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if err != nil {
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return storj.Bucket{}, err
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}
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if current.Placement != bucket.Placement {
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ok, err := buckets.metabase.BucketEmpty(ctx, metabase.BucketEmpty{
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ProjectID: bucket.ProjectID,
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BucketName: bucket.Name,
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})
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switch {
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case err != nil:
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return storj.Bucket{}, err
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case !ok:
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return storj.Bucket{}, ErrBucketNotEmpty.New("cannot modify placement constraint for non-empty bucket")
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}
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}
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return buckets.DB.UpdateBucket(ctx, bucket)
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}
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