pvtdatastorage

Documentation

Index

• func TrimPvtWSet(pvtWSet *rwset.TxPvtReadWriteSet, filter ledger.PvtNsCollFilter) *rwset.TxPvtReadWriteSet
• type ErrIllegalArgs
  • func (err *ErrIllegalArgs) Error() string
• type ErrIllegalCall
  • func (err *ErrIllegalCall) Error() string
• type ErrOutOfRange
  • func (err *ErrOutOfRange) Error() string
• type Provider
  • func NewProvider() Provider
• type Store
• type StoreEnv
  • func NewTestStoreEnv(t *testing.T) *StoreEnv
  • func (env *StoreEnv) Cleanup()
  • func (env *StoreEnv) CloseAndReopen()

Functions

func TrimPvtWSet

func TrimPvtWSet(pvtWSet *rwset.TxPvtReadWriteSet, filter ledger.PvtNsCollFilter) *rwset.TxPvtReadWriteSet

TrimPvtWSet returns a `TxPvtReadWriteSet` that retains only list of 'ns/collections' supplied in the filter A nil filter does not filter any results and returns the original `pvtWSet` as is

Types

type ErrIllegalArgs

type ErrIllegalArgs struct {
	// contains filtered or unexported fields
}

ErrIllegalArgs is to be thrown by a store impl if the args passed are not allowed

func (*ErrIllegalArgs) Error

func (err *ErrIllegalArgs) Error() string

type ErrIllegalCall

type ErrIllegalCall struct {
	// contains filtered or unexported fields
}

ErrIllegalCall is to be thrown by a store impl if the store does not expect a call to Prepare/Commit/Rollback/InitLastCommittedBlock

func (*ErrIllegalCall) Error

func (err *ErrIllegalCall) Error() string

type ErrOutOfRange

type ErrOutOfRange struct {
	// contains filtered or unexported fields
}

ErrOutOfRange is to be thrown for the request for the data that is not yet committed

func (*ErrOutOfRange) Error

func (err *ErrOutOfRange) Error() string

type Provider

type Provider interface {
	OpenStore(id string) (Store, error)
	Close()
}

Provider provides handle to specific 'Store' that in turn manages private write sets for a ledger

func NewProvider

func NewProvider() Provider

NewProvider instantiates a StoreProvider

type Store

type Store interface {
	// InitLastCommittedBlockHeight sets the last commited block height into the pvt data store
	// This function is used in a special case where the peer is started up with the blockchain
	// from an earlier version of a peer when the pvt data feature (and hence this store) was not
	// available. This function is expected to be called only this situation and hence is
	// expected to throw an error if the store is not empty. On a successful return from this
	// fucntion the state of the store is expected to be same as of calling the prepare/commit
	// function for block `0` through `blockNum` with no pvt data
	InitLastCommittedBlock(blockNum uint64) error
	// GetPvtDataByBlockNum returns only the pvt data  corresponding to the given block number
	// The pvt data is filtered by the list of 'ns/collections' supplied in the filter
	// A nil filter does not filter any results
	GetPvtDataByBlockNum(blockNum uint64, filter ledger.PvtNsCollFilter) ([]*ledger.TxPvtData, error)
	// Prepare prepares the Store for commiting the pvt data. This call does not commit the pvt data.
	// Subsequently, the caller is expected to call either `Commit` or `Rollback` function.
	// Return from this should ensure that enough preparation is done such that `Commit` function invoked afterwards
	// can commit the data and the store is capable of surviving a crash between this function call and the next
	// invoke to the `Commit`
	Prepare(blockNum uint64, pvtData []*ledger.TxPvtData) error
	// Commit commits the pvt data passed in the previous invoke to the `Prepare` function
	Commit() error
	// Rollback rolls back the pvt data passed in the previous invoke to the `Prepare` function
	Rollback() error
	// IsEmpty returns true if the store does not have any block committed yet
	IsEmpty() (bool, error)
	// LastCommittedBlockHeight returns the height of the last committed block
	LastCommittedBlockHeight() (uint64, error)
	// HasPendingBatch returns if the store has a pending batch
	HasPendingBatch() (bool, error)
	// Shutdown stops the store
	Shutdown()
}

Store manages the permanent storage of private write sets for a ledger Beacsue the pvt data is supposed to be in sync with the blocks in the ledger, both should logically happen in an atomic operation. In order to accomplish this, an implementation of this store should provide support for a two-phase like commit/rollback capability. The expected use is such that - first the private data will be given to this store (via `Prepare` funtion) and then the block is appended to the block storage. Finally, one of the functions `Commit` or `Rollback` is invoked on this store based on whether the block was written successfully or not. The store implementation is expected to survive a server crash between the call to `Prepare` and `Commit`/`Rollback`

type StoreEnv

type StoreEnv struct {
	TestStoreProvider Provider
	TestStore         Store
	// contains filtered or unexported fields
}

StoreEnv provides the store env for testing

func NewTestStoreEnv

func NewTestStoreEnv(t *testing.T) *StoreEnv

NewTestStoreEnv construct a StoreEnv for testing

func (*StoreEnv) Cleanup

func (env *StoreEnv) Cleanup()

Cleanup cleansup the store env after testing

func (*StoreEnv) CloseAndReopen

func (env *StoreEnv) CloseAndReopen()

CloseAndReopen closes and opens the store provider