buckets

Documentation

Index

• Constants
• Variables
• type Bucket
• type DB
• type List
• type ListDirection
• type ListOptions
  • func (opts ListOptions) NextPage(list List) ListOptions
• type MinimalBucket
• type Service
  • func NewService(bucketsDB DB, metabase *metabase.DB) *Service
  • func (buckets *Service) UpdateBucket(ctx context.Context, bucket Bucket) (Bucket, error)

Constants

const (
	// DirectionForward lists forwards from cursor, including cursor.
	DirectionForward = pb.ListDirection_FORWARD
	// DirectionAfter lists forwards from cursor, without cursor.
	DirectionAfter = pb.ListDirection_AFTER
)

Variables

var (
	// ErrBucket is an error class for general bucket errors.
	ErrBucket = errs.Class("bucket")

	// ErrNoBucket is an error class for using empty bucket name.
	ErrNoBucket = errs.Class("no bucket specified")

	// ErrBucketNotFound is an error class for non-existing bucket.
	ErrBucketNotFound = errs.Class("bucket not found")

	// ErrBucketAlreadyExists is used to indicate that bucket already exists.
	ErrBucketAlreadyExists = errs.Class("bucket already exists")
)

var (
	// ErrBucketNotEmpty is returned when a caller attempts to change placement constraints.
	ErrBucketNotEmpty = errs.Class("bucket must be empty")
)

Types

type Bucket

type Bucket struct {
	ID                          uuid.UUID
	Name                        string
	ProjectID                   uuid.UUID
	UserAgent                   []byte
	Created                     time.Time
	PathCipher                  storj.CipherSuite
	DefaultSegmentsSize         int64
	DefaultRedundancyScheme     storj.RedundancyScheme
	DefaultEncryptionParameters storj.EncryptionParameters
	Placement                   storj.PlacementConstraint
}

Bucket contains information about a specific bucket.

type DB

type DB interface {
	// CreateBucket creates a new bucket
	CreateBucket(ctx context.Context, bucket Bucket) (_ Bucket, err error)
	// GetBucket returns an existing bucket
	GetBucket(ctx context.Context, bucketName []byte, projectID uuid.UUID) (bucket Bucket, err error)
	// GetBucketPlacement returns with the placement constraint identifier.
	GetBucketPlacement(ctx context.Context, bucketName []byte, projectID uuid.UUID) (placement storj.PlacementConstraint, err error)
	// GetMinimalBucket returns existing bucket with minimal number of fields.
	GetMinimalBucket(ctx context.Context, bucketName []byte, projectID uuid.UUID) (bucket MinimalBucket, err error)
	// HasBucket returns if a bucket exists.
	HasBucket(ctx context.Context, bucketName []byte, projectID uuid.UUID) (exists bool, err error)
	// GetBucketID returns an existing bucket id.
	GetBucketID(ctx context.Context, bucket metabase.BucketLocation) (id uuid.UUID, err error)
	// UpdateBucket updates an existing bucket
	UpdateBucket(ctx context.Context, bucket Bucket) (_ Bucket, err error)
	// UpdateUserAgent updates buckets user agent.
	UpdateUserAgent(ctx context.Context, projectID uuid.UUID, bucketName string, userAgent []byte) error
	// DeleteBucket deletes a bucket
	DeleteBucket(ctx context.Context, bucketName []byte, projectID uuid.UUID) (err error)
	// ListBuckets returns all buckets for a project
	ListBuckets(ctx context.Context, projectID uuid.UUID, listOpts ListOptions, allowedBuckets macaroon.AllowedBuckets) (bucketList List, err error)
	// CountBuckets returns the number of buckets a project currently has
	CountBuckets(ctx context.Context, projectID uuid.UUID) (int, error)
	// IterateBucketLocations iterates through all buckets from some point with limit.
	IterateBucketLocations(ctx context.Context, projectID uuid.UUID, bucketName string, limit int, fn func([]metabase.BucketLocation) error) (more bool, err error)
}

DB is the interface for the database to interact with buckets.

architecture: Database

type List

type List struct {
	More  bool
	Items []Bucket
}

List is a list of buckets.

type ListDirection

type ListDirection = pb.ListDirection

ListDirection specifies listing direction.

type ListOptions

type ListOptions struct {
	Cursor    string
	Direction ListDirection
	Limit     int
}

ListOptions lists objects.

func (ListOptions) NextPage

func (opts ListOptions) NextPage(list List) ListOptions

NextPage returns options for listing the next page.

type MinimalBucket

type MinimalBucket struct {
	Name      []byte
	CreatedAt time.Time
}

MinimalBucket contains minimal bucket fields for metainfo protocol.

type Service

type Service struct {
	DB
	// contains filtered or unexported fields
}

Service encapsulates operations around buckets.

func NewService

func NewService(bucketsDB DB, metabase *metabase.DB) *Service

NewService converts the provided db and metabase calls into a single DB interface.

func (*Service) UpdateBucket

func (buckets *Service) UpdateBucket(ctx context.Context, bucket Bucket) (Bucket, error)

UpdateBucket overrides the default UpdateBucket behaviour by adding a check against MetabaseDB to ensure the bucket is empty before attempting to change the placement constraint of a bucket. If the placement constraint is not being changed, then this additional check is skipped.