mocktikv

package
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 Go to latest Published: May 24, 2021 License: Apache-2.0 Imports: 25 Imported by: 0

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Index

Constants

This section is empty.

Variables

View Source 
var ErrInvalidEncodedKey = errors.New("invalid encoded key")

ErrInvalidEncodedKey describes parsing an invalid format of EncodedKey.

Functions

func BootstrapWithMultiRegions 

func BootstrapWithMultiRegions(cluster *Cluster, splitKeys ...[]byte) (storeID uint64, regionIDs, peerIDs []uint64)

BootstrapWithMultiRegions initializes a Cluster with multiple Regions and 1 Store. The number of Regions will be len(splitKeys) + 1.

func BootstrapWithMultiStores 

func BootstrapWithMultiStores(cluster *Cluster, n int) (storeIDs, peerIDs []uint64, regionID uint64, leaderPeer uint64)

BootstrapWithMultiStores initializes a Cluster with 1 Region and n Stores.

func BootstrapWithSingleStore 

func BootstrapWithSingleStore(cluster *Cluster) (storeID, peerID, regionID uint64)

BootstrapWithSingleStore initializes a Cluster with 1 Region and 1 Store.

func NewPDClient 

func NewPDClient(cluster *Cluster) pd.Client

NewPDClient creates a mock pd.Client that uses local timestamp and meta data from a Cluster.

Types

type Cluster 

type Cluster struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

Cluster simulates a TiKV cluster. It focuses on management and the change of meta data. A Cluster mainly includes following 3 kinds of meta data:

  1. Region: A Region is a fragment of TiKV's data whose range is [start, end). The data of a Region is duplicated to multiple Peers and distributed in multiple Stores.
  2. Peer: A Peer is a replica of a Region's data. All peers of a Region form a group, each group elects a Leader to provide services.
  3. Store: A Store is a storage/service node. Try to think it as a TiKV server process. Only the store with request's Region's leader Peer could respond to client's request.

func NewCluster 

func NewCluster() *Cluster

NewCluster creates an empty cluster. It needs to be bootstrapped before providing service.

func (*Cluster) AddPeer 

func (c *Cluster) AddPeer(regionID, storeID, peerID uint64)

AddPeer adds a new Peer for the Region on the Store.

func (*Cluster) AddStore 

func (c *Cluster) AddStore(storeID uint64, addr string)

AddStore adds a new Store to the cluster.

func (*Cluster) AllocID 

func (c *Cluster) AllocID() uint64

AllocID creates an unique ID in cluster. The ID could be used as either StoreID, RegionID, or PeerID.

func (*Cluster) AllocIDs 

func (c *Cluster) AllocIDs(n int) []uint64

AllocIDs creates multiple IDs.

func (*Cluster) Bootstrap 

func (c *Cluster) Bootstrap(regionID uint64, storeIDs, peerIDs []uint64, leaderPeerID uint64)

Bootstrap creates the first Region. The Stores should be in the Cluster before bootstrap.

func (*Cluster) CancelStore 

func (c *Cluster) CancelStore(storeID uint64)

CancelStore makes the store with cancel state true.

func (*Cluster) ChangeLeader 

func (c *Cluster) ChangeLeader(regionID, leaderPeerID uint64)

ChangeLeader sets the Region's leader Peer. Caller should guarantee the Peer exists.

func (*Cluster) GetAllRegions 

func (c *Cluster) GetAllRegions() []*Region

GetAllRegions gets all the regions in the cluster.

func (*Cluster) GetAndCheckStoreByAddr 

func (c *Cluster) GetAndCheckStoreByAddr(addr string) (*metapb.Store, error)

GetAndCheckStoreByAddr checks and returns a Store's meta by an addr

func (*Cluster) GetPrevRegionByKey 

func (c *Cluster) GetPrevRegionByKey(key []byte) (*metapb.Region, *metapb.Peer)

GetPrevRegionByKey returns the previous Region and its leader whose range contains the key.

func (*Cluster) GetRegion 

func (c *Cluster) GetRegion(regionID uint64) (*metapb.Region, uint64)

GetRegion returns a Region's meta and leader ID.

func (*Cluster) GetRegionByID 

func (c *Cluster) GetRegionByID(regionID uint64) (*metapb.Region, *metapb.Peer)

GetRegionByID returns the Region and its leader whose ID is regionID.

func (*Cluster) GetRegionByKey 

func (c *Cluster) GetRegionByKey(key []byte) (*metapb.Region, *metapb.Peer)

GetRegionByKey returns the Region and its leader whose range contains the key.

func (*Cluster) GetStore 

func (c *Cluster) GetStore(storeID uint64) *metapb.Store

GetStore returns a Store's meta.

func (*Cluster) GetStoreByAddr 

func (c *Cluster) GetStoreByAddr(addr string) *metapb.Store

GetStoreByAddr returns a Store's meta by an addr.

func (*Cluster) GiveUpLeader 

func (c *Cluster) GiveUpLeader(regionID uint64)

GiveUpLeader sets the Region's leader to 0. The Region will have no leader before calling ChangeLeader().

func (*Cluster) Merge 

func (c *Cluster) Merge(regionID1, regionID2 uint64)

Merge merges 2 regions, their key ranges should be adjacent.

func (*Cluster) RemovePeer 

func (c *Cluster) RemovePeer(regionID, storeID uint64)

RemovePeer removes the Peer from the Region. Note that if the Peer is leader, the Region will have no leader before calling ChangeLeader().

func (*Cluster) RemoveStore 

func (c *Cluster) RemoveStore(storeID uint64)

RemoveStore removes a Store from the cluster.

func (*Cluster) Split 

func (c *Cluster) Split(regionID, newRegionID uint64, key []byte, peerIDs []uint64, leaderPeerID uint64)

Split splits a Region at the key (encoded) and creates new Region.

func (*Cluster) SplitIndex 

func (c *Cluster) SplitIndex(mvccStore MVCCStore, tableID, indexID int64, count int)

SplitIndex evenly splits the data in index into count regions. Only works for single store.

func (*Cluster) SplitRaw 

func (c *Cluster) SplitRaw(regionID, newRegionID uint64, rawKey []byte, peerIDs []uint64, leaderPeerID uint64)

SplitRaw splits a Region at the key (not encoded) and creates new Region.

func (*Cluster) SplitTable 

func (c *Cluster) SplitTable(mvccStore MVCCStore, tableID int64, count int)

SplitTable evenly splits the data in table into count regions. Only works for single store.

func (*Cluster) StartStore 

func (c *Cluster) StartStore(storeID uint64)

StartStore starts a store with storeID.

func (*Cluster) StopStore 

func (c *Cluster) StopStore(storeID uint64)

StopStore stops a store with storeID.

func (*Cluster) UnCancelStore 

func (c *Cluster) UnCancelStore(storeID uint64)

UnCancelStore makes the store with cancel state false.

func (*Cluster) UpdateStoreAddr 

func (c *Cluster) UpdateStoreAddr(storeID uint64, addr string)

UpdateStoreAddr updates store address for cluster.

type ErrAbort 

type ErrAbort string

ErrAbort means something is wrong and client should abort the txn.

func (ErrAbort) Error 

func (e ErrAbort) Error() string

type ErrAlreadyCommitted 

type ErrAlreadyCommitted uint64

ErrAlreadyCommitted is returned specially when client tries to rollback a committed lock.

func (ErrAlreadyCommitted) Error 

func (e ErrAlreadyCommitted) Error() string

type ErrLocked 

type ErrLocked struct {
	Key     MvccKey
	Primary []byte
	StartTS uint64
	TTL     uint64
}

ErrLocked is returned when trying to Read/Write on a locked key. Client should backoff or cleanup the lock then retry.

func (*ErrLocked) Error 

func (e *ErrLocked) Error() string

Error formats the lock to a string.

type ErrRetryable 

type ErrRetryable string

ErrRetryable suggests that client may restart the txn. e.g. write conflict.

func (ErrRetryable) Error 

func (e ErrRetryable) Error() string

type Iterator 

type Iterator struct {
	iterator.Iterator
	// contains filtered or unexported fields
}

Iterator wraps iterator.Iterator to provide Valid() method.

func (*Iterator) Next 

func (iter *Iterator) Next()

Next moves the iterator to the next key/value pair.

func (*Iterator) Valid 

func (iter *Iterator) Valid() bool

Valid returns whether the iterator is exhausted.

type MVCCDebugger 

type MVCCDebugger interface {
	MvccGetByStartTS(startKey, endKey []byte, starTS uint64) (*kvrpcpb.MvccInfo, []byte)
	MvccGetByKey(key []byte) *kvrpcpb.MvccInfo
}

MVCCDebugger is for debugging.

type MVCCLevelDB 

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

MVCCLevelDB implements the MVCCStore interface.

func NewMVCCLevelDB 

func NewMVCCLevelDB(path string) (*MVCCLevelDB, error)

NewMVCCLevelDB returns a new MVCCLevelDB object.

func (*MVCCLevelDB) BatchGet 

func (mvcc *MVCCLevelDB) BatchGet(ks [][]byte, startTS uint64, isoLevel kvrpcpb.IsolationLevel) []Pair

BatchGet implements the MVCCStore interface.

func (*MVCCLevelDB) BatchResolveLock 

func (mvcc *MVCCLevelDB) BatchResolveLock(startKey, endKey []byte, txnInfos map[uint64]uint64) error

BatchResolveLock implements the MVCCStore interface.

func (*MVCCLevelDB) Cleanup 

func (mvcc *MVCCLevelDB) Cleanup(key []byte, startTS uint64) error

Cleanup implements the MVCCStore interface.

func (*MVCCLevelDB) Close 

func (mvcc *MVCCLevelDB) Close() error

Close calls leveldb's Close to free resources.

func (*MVCCLevelDB) Commit 

func (mvcc *MVCCLevelDB) Commit(keys [][]byte, startTS, commitTS uint64) error

Commit implements the MVCCStore interface.

func (*MVCCLevelDB) DeleteRange 

func (mvcc *MVCCLevelDB) DeleteRange(startKey, endKey []byte) error

DeleteRange implements the MVCCStore interface.

func (*MVCCLevelDB) Get 

func (mvcc *MVCCLevelDB) Get(key []byte, startTS uint64, isoLevel kvrpcpb.IsolationLevel) ([]byte, error)

Get implements the MVCCStore interface. key cannot be nil or []byte{}

func (*MVCCLevelDB) Prewrite 

func (mvcc *MVCCLevelDB) Prewrite(mutations []*kvrpcpb.Mutation, primary []byte, startTS uint64, ttl uint64) []error

Prewrite implements the MVCCStore interface.

func (*MVCCLevelDB) RawBatchDelete 

func (mvcc *MVCCLevelDB) RawBatchDelete(keys [][]byte)

RawBatchDelete implements the RawKV interface.

func (*MVCCLevelDB) RawBatchGet 

func (mvcc *MVCCLevelDB) RawBatchGet(keys [][]byte) [][]byte

RawBatchGet implements the RawKV interface.

func (*MVCCLevelDB) RawBatchPut 

func (mvcc *MVCCLevelDB) RawBatchPut(keys, values [][]byte)

RawBatchPut implements the RawKV interface

func (*MVCCLevelDB) RawDelete 

func (mvcc *MVCCLevelDB) RawDelete(key []byte)

RawDelete implements the RawKV interface.

func (*MVCCLevelDB) RawDeleteRange 

func (mvcc *MVCCLevelDB) RawDeleteRange(startKey, endKey []byte)

RawDeleteRange implements the RawKV interface.

func (*MVCCLevelDB) RawGet 

func (mvcc *MVCCLevelDB) RawGet(key []byte) []byte

RawGet implements the RawKV interface.

func (*MVCCLevelDB) RawPut 

func (mvcc *MVCCLevelDB) RawPut(key, value []byte)

RawPut implements the RawKV interface.

func (*MVCCLevelDB) RawScan 

func (mvcc *MVCCLevelDB) RawScan(startKey, endKey []byte, limit int) []Pair

RawScan implements the RawKV interface.

func (*MVCCLevelDB) ResolveLock 

func (mvcc *MVCCLevelDB) ResolveLock(startKey, endKey []byte, startTS, commitTS uint64) error

ResolveLock implements the MVCCStore interface.

func (*MVCCLevelDB) ReverseScan 

func (mvcc *MVCCLevelDB) ReverseScan(startKey, endKey []byte, limit int, startTS uint64, isoLevel kvrpcpb.IsolationLevel) []Pair

ReverseScan implements the MVCCStore interface. The search range is [startKey, endKey).

func (*MVCCLevelDB) Rollback 

func (mvcc *MVCCLevelDB) Rollback(keys [][]byte, startTS uint64) error

Rollback implements the MVCCStore interface.

func (*MVCCLevelDB) Scan 

func (mvcc *MVCCLevelDB) Scan(startKey, endKey []byte, limit int, startTS uint64, isoLevel kvrpcpb.IsolationLevel) []Pair

Scan implements the MVCCStore interface.

func (*MVCCLevelDB) ScanLock 

func (mvcc *MVCCLevelDB) ScanLock(startKey, endKey []byte, maxTS uint64) ([]*kvrpcpb.LockInfo, error)

ScanLock implements the MVCCStore interface.

type MVCCStore 

type MVCCStore interface {
	Get(key []byte, startTS uint64, isoLevel kvrpcpb.IsolationLevel) ([]byte, error)
	Scan(startKey, endKey []byte, limit int, startTS uint64, isoLevel kvrpcpb.IsolationLevel) []Pair
	ReverseScan(startKey, endKey []byte, limit int, startTS uint64, isoLevel kvrpcpb.IsolationLevel) []Pair
	BatchGet(ks [][]byte, startTS uint64, isoLevel kvrpcpb.IsolationLevel) []Pair
	Prewrite(mutations []*kvrpcpb.Mutation, primary []byte, startTS uint64, ttl uint64) []error
	Commit(keys [][]byte, startTS, commitTS uint64) error
	Rollback(keys [][]byte, startTS uint64) error
	Cleanup(key []byte, startTS uint64) error
	ScanLock(startKey, endKey []byte, maxTS uint64) ([]*kvrpcpb.LockInfo, error)
	ResolveLock(startKey, endKey []byte, startTS, commitTS uint64) error
	BatchResolveLock(startKey, endKey []byte, txnInfos map[uint64]uint64) error
	DeleteRange(startKey, endKey []byte) error
	Close() error
}

MVCCStore is a mvcc key-value storage.

func MustNewMVCCStore 

func MustNewMVCCStore() MVCCStore

MustNewMVCCStore is used for testing, use NewMVCCLevelDB instead.

type MvccKey 

type MvccKey []byte

MvccKey is the encoded key type. On TiKV, keys are encoded before they are saved into storage engine.

func NewMvccKey 

func NewMvccKey(key []byte) MvccKey

NewMvccKey encodes a key into MvccKey.

func (MvccKey) Raw 

func (key MvccKey) Raw() []byte

Raw decodes a MvccKey to original key.

type Pair 

type Pair struct {
	Key   []byte
	Value []byte
	Err   error
}

Pair is a KV pair read from MvccStore or an error if any occurs.

type RPCClient 

type RPCClient struct {
	Cluster   *Cluster
	MvccStore MVCCStore
	// contains filtered or unexported fields
}

RPCClient sends kv RPC calls to mock cluster. RPCClient mocks the behavior of a rpc client at tikv's side.

func NewRPCClient 

func NewRPCClient(cluster *Cluster, mvccStore MVCCStore) *RPCClient

NewRPCClient creates an RPCClient. Note that close the RPCClient may close the underlying MvccStore.

func NewTiKVAndPDClient 

func NewTiKVAndPDClient(cluster *Cluster, mvccStore MVCCStore, path string) (*RPCClient, pd.Client, error)

NewTiKVAndPDClient creates a TiKV client and PD client from options.

func (*RPCClient) Close 

func (c *RPCClient) Close() error

Close closes the client.

func (*RPCClient) SendRequest 

func (c *RPCClient) SendRequest(ctx context.Context, addr string, req *rpc.Request, timeout time.Duration) (*rpc.Response, error)

SendRequest sends a request to mock cluster.

type RawKV 

type RawKV interface {
	RawGet(key []byte) []byte
	RawBatchGet(keys [][]byte) [][]byte
	RawScan(startKey, endKey []byte, limit int) []Pair
	RawPut(key, value []byte)
	RawBatchPut(keys, values [][]byte)
	RawDelete(key []byte)
	RawBatchDelete(keys [][]byte)
	RawDeleteRange(startKey, endKey []byte)
}

RawKV is a key-value storage. MVCCStore can be implemented upon it with timestamp encoded into key.

type Region 

type Region struct {
	Meta *metapb.Region
	// contains filtered or unexported fields
}

Region is the Region meta data.

type Store 

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

Store is the Store's meta data.

Source Files

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