mocktikv

package
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 Go to latest Published: Jul 24, 2017 License: Apache-2.0 Imports: 28 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// FlagIgnoreTruncate indicates if truncate error should be ignored.
	// Read-only statements should ignore truncate error, write statements should not ignore truncate error.
	FlagIgnoreTruncate uint64 = 1
	// FlagTruncateAsWarning indicates if truncate error should be returned as warning.
	// This flag only matters if FlagIgnoreTruncate is not set, in strict sql mode, truncate error should
	// be returned as error, in non-strict sql mode, truncate error should be saved as warning.
	FlagTruncateAsWarning uint64 = 1 << 1
)

Flags are used by tipb.SelectRequest.Flags to handle execution mode, like how to handle truncate error.

Variables

This section is empty.

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 add 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, leaderStoreID 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, leaderStoreID 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) 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 MVCCStore 

type MVCCStore interface {
	RawKV
	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
}

MVCCStore is a mvcc key-value storage.

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 MvccStore 

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

MvccStore is an in-memory, multi-versioned, transaction-supported kv storage.

func NewMvccStore 

func NewMvccStore() *MvccStore

NewMvccStore creates a MvccStore.

func (*MvccStore) BatchGet 

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

BatchGet gets values with keys and ts.

func (*MvccStore) Cleanup 

func (s *MvccStore) Cleanup(key []byte, startTS uint64) error

Cleanup cleanups a lock, often used when resolving a expired lock.

func (*MvccStore) Commit 

func (s *MvccStore) Commit(keys [][]byte, startTS, commitTS uint64) error

Commit commits the lock on a key. (2nd phase of 2PC).

func (*MvccStore) Get 

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

Get reads a key by ts.

func (*MvccStore) Prewrite 

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

Prewrite acquires a lock on a key. (1st phase of 2PC).

func (*MvccStore) RawDelete 

func (s *MvccStore) RawDelete(key []byte)

RawDelete deletes a key-value pair.

func (*MvccStore) RawGet 

func (s *MvccStore) RawGet(key []byte) []byte

RawGet queries value with the key.

func (*MvccStore) RawPut 

func (s *MvccStore) RawPut(key, value []byte)

RawPut stores a key-value pair.

func (*MvccStore) RawScan 

func (s *MvccStore) RawScan(startKey, endKey []byte, limit int) []Pair

RawScan reads up to a limited number of rawkv Pairs.

func (*MvccStore) ResolveLock 

func (s *MvccStore) ResolveLock(startKey, endKey []byte, startTS, commitTS uint64) error

ResolveLock resolves all orphan locks belong to a transaction.

func (*MvccStore) ReverseScan 

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

ReverseScan reads up to a limited number of Pairs that greater than or equal to startKey and less than endKey in descending order.

func (*MvccStore) Rollback 

func (s *MvccStore) Rollback(keys [][]byte, startTS uint64) error

Rollback cleanups multiple locks, often used when rolling back a conflict txn.

func (*MvccStore) Scan 

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

Scan reads up to a limited number of Pairs that greater than or equal to startKey and less than endKey.

func (*MvccStore) ScanLock 

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

ScanLock scans all orphan locks in a Region.

type Pair 

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

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

type RPCClient 

type RPCClient struct {
	Cluster   *Cluster
	MvccStore MVCCStore
}

RPCClient sends kv RPC calls to mock cluster.

func NewRPCClient 

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

NewRPCClient creates an RPCClient.

func (*RPCClient) Close 

func (c *RPCClient) Close() error

Close closes the client.

func (*RPCClient) SendReq 

func (c *RPCClient) SendReq(ctx goctx.Context, addr string, req *tikvrpc.Request) (*tikvrpc.Response, error)

SendReq sends a request to mock cluster.

type RawKV 

type RawKV interface {
	RawGet(key []byte) []byte
	RawScan(startKey, endKey []byte, limit int) []Pair
	RawPut(key, value []byte)
	RawDelete(key []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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