chunkstore

Documentation

Index

• Constants
• func Delete(ctx context.Context, s storage.IndexStore, sh storage.Sharky, ...) error
• func Get(ctx context.Context, r storage.Reader, s storage.Sharky, addr swarm.Address) (swarm.Chunk, error)
• func Has(_ context.Context, r storage.Reader, addr swarm.Address) (bool, error)
• func Iterate(ctx context.Context, s storage.IndexStore, sh storage.Sharky, ...) error
• func IterateChunkEntries(st storage.Reader, fn func(swarm.Address, uint32) (bool, error)) error
• func IterateItems(st storage.Store, callBackFunc func(*RetrievalIndexItem) error) error
• func IterateLocations(ctx context.Context, st storage.Reader) <-chan LocationResult
• func Put(ctx context.Context, s storage.IndexStore, sh storage.Sharky, ch swarm.Chunk) error
• type IterateResult
• type LocationResult
• type RetrievalIndexItem
  • func (r *RetrievalIndexItem) Clone() storage.Item
  • func (r *RetrievalIndexItem) ID() string
  • func (r *RetrievalIndexItem) Marshal() ([]byte, error)
  • func (RetrievalIndexItem) Namespace() string
  • func (r RetrievalIndexItem) String() string
  • func (r *RetrievalIndexItem) Unmarshal(buf []byte) error
• type Sharky

Constants

const RetrievalIndexItemSize = swarm.HashSize + 8 + sharky.LocationSize + 4

Functions

func Delete

func Delete(ctx context.Context, s storage.IndexStore, sh storage.Sharky, addr swarm.Address) error

func Get

func Get(ctx context.Context, r storage.Reader, s storage.Sharky, addr swarm.Address) (swarm.Chunk, error)

func Has

func Has(_ context.Context, r storage.Reader, addr swarm.Address) (bool, error)

func Iterate

func Iterate(ctx context.Context, s storage.IndexStore, sh storage.Sharky, fn storage.IterateChunkFn) error

func IterateChunkEntries

func IterateChunkEntries(st storage.Reader, fn func(swarm.Address, uint32) (bool, error)) error

func IterateItems

func IterateItems(st storage.Store, callBackFunc func(*RetrievalIndexItem) error) error

Iterate iterates over entire retrieval index with a call back.

func IterateLocations

func IterateLocations(
	ctx context.Context,
	st storage.Reader,
) <-chan LocationResult

IterateLocations iterates over entire retrieval index and plucks only sharky location.

func Put

func Put(ctx context.Context, s storage.IndexStore, sh storage.Sharky, ch swarm.Chunk) error

Types

type IterateResult

type IterateResult struct {
	Err  error
	Item *RetrievalIndexItem
}

type LocationResult

type LocationResult struct {
	Err      error
	Location sharky.Location
}

type RetrievalIndexItem

type RetrievalIndexItem struct {
	Address   swarm.Address
	Timestamp uint64
	Location  sharky.Location
	RefCnt    uint32
}

RetrievalIndexItem is the index which gives us the sharky location from the swarm.Address. The RefCnt stores the reference of each time a Put operation is issued on this Address.

func (*RetrievalIndexItem) Clone

func (r *RetrievalIndexItem) Clone() storage.Item

func (*RetrievalIndexItem) ID

func (r *RetrievalIndexItem) ID() string

func (*RetrievalIndexItem) Marshal

func (r *RetrievalIndexItem) Marshal() ([]byte, error)

Stored in bytes as: |--Address(32)--|--Timestamp(8)--|--Location(7)--|--RefCnt(4)--|

func (RetrievalIndexItem) Namespace

func (RetrievalIndexItem) Namespace() string

func (RetrievalIndexItem) String

func (r RetrievalIndexItem) String() string

func (*RetrievalIndexItem) Unmarshal

func (r *RetrievalIndexItem) Unmarshal(buf []byte) error

type Sharky

type Sharky interface {
	Read(context.Context, sharky.Location, []byte) error
	Write(context.Context, []byte) (sharky.Location, error)
	Release(context.Context, sharky.Location) error
}

Sharky provides an abstraction for the sharky.Store operations used in the chunkstore. This allows us to be more flexible in passing in the sharky instance to chunkstore. For eg, check the TxChunkStore implementation in this pkg.