tikvrpc

Documentation

Index

• func CheckStreamTimeoutLoop(ch <-chan *Lease)
• func SetContext(req *Request, region *metapb.Region, peer *metapb.Peer) error
• type CmdType
  • func (t CmdType) String() string
• type CopStreamResponse
  • func (resp *CopStreamResponse) Close()
  • func (resp *CopStreamResponse) Recv() (*coprocessor.Response, error)
• type Lease
• type Request
• type Response
  • func CallRPC(ctx context.Context, client tikvpb.TikvClient, req *Request) (*Response, error)
  • func GenRegionErrorResp(req *Request, e *errorpb.Error) (*Response, error)
  • func (resp *Response) GetRegionError() (*errorpb.Error, error)

Functions

func CheckStreamTimeoutLoop

func CheckStreamTimeoutLoop(ch <-chan *Lease)

CheckStreamTimeoutLoop runs periodically to check is there any stream request timeouted. Lease is an object to track stream requests, call this function with "go CheckStreamTimeoutLoop()"

func SetContext

func SetContext(req *Request, region *metapb.Region, peer *metapb.Peer) error

SetContext set the Context field for the given req to the specified ctx.

Types

type CmdType

type CmdType uint16

CmdType represents the concrete request type in Request or response type in Response.

const (
	CmdGet CmdType = 1 + iota
	CmdScan
	CmdPrewrite
	CmdCommit
	CmdCleanup
	CmdBatchGet
	CmdBatchRollback
	CmdScanLock
	CmdResolveLock
	CmdGC
	CmdDeleteRange

	CmdRawGet CmdType = 256 + iota
	CmdRawPut
	CmdRawDelete
	CmdRawDeleteRange
	CmdRawScan

	CmdCop CmdType = 512 + iota
	CmdCopStream

	CmdMvccGetByKey CmdType = 1024 + iota
	CmdMvccGetByStartTs
	CmdSplitRegion
)

CmdType values.

func (CmdType) String

func (t CmdType) String() string

type CopStreamResponse

type CopStreamResponse struct {
	tikvpb.Tikv_CoprocessorStreamClient
	*coprocessor.Response // The first result of Recv()
	Timeout               time.Duration
	Lease                 // Shared by this object and a background goroutine.
}

CopStreamResponse combinates tikvpb.Tikv_CoprocessorStreamClient and the first Recv() result together. In streaming API, get grpc stream client may not involve any network packet, then region error have to be handled in Recv() function. This struct facilitates the error handling.

func (*CopStreamResponse) Close

func (resp *CopStreamResponse) Close()

Close closes the CopStreamResponse object.

func (*CopStreamResponse) Recv

func (resp *CopStreamResponse) Recv() (*coprocessor.Response, error)

Recv overrides the stream client Recv() function.

type Lease

type Lease struct {
	Cancel context.CancelFunc
	// contains filtered or unexported fields
}

Lease is used to implement grpc stream timeout.

type Request

type Request struct {
	kvrpcpb.Context
	Type             CmdType
	Get              *kvrpcpb.GetRequest
	Scan             *kvrpcpb.ScanRequest
	Prewrite         *kvrpcpb.PrewriteRequest
	Commit           *kvrpcpb.CommitRequest
	Cleanup          *kvrpcpb.CleanupRequest
	BatchGet         *kvrpcpb.BatchGetRequest
	BatchRollback    *kvrpcpb.BatchRollbackRequest
	ScanLock         *kvrpcpb.ScanLockRequest
	ResolveLock      *kvrpcpb.ResolveLockRequest
	GC               *kvrpcpb.GCRequest
	DeleteRange      *kvrpcpb.DeleteRangeRequest
	RawGet           *kvrpcpb.RawGetRequest
	RawPut           *kvrpcpb.RawPutRequest
	RawDelete        *kvrpcpb.RawDeleteRequest
	RawDeleteRange   *kvrpcpb.RawDeleteRangeRequest
	RawScan          *kvrpcpb.RawScanRequest
	Cop              *coprocessor.Request
	MvccGetByKey     *kvrpcpb.MvccGetByKeyRequest
	MvccGetByStartTs *kvrpcpb.MvccGetByStartTsRequest
	SplitRegion      *kvrpcpb.SplitRegionRequest
}

Request wraps all kv/coprocessor requests.

type Response

type Response struct {
	Type             CmdType
	Get              *kvrpcpb.GetResponse
	Scan             *kvrpcpb.ScanResponse
	Prewrite         *kvrpcpb.PrewriteResponse
	Commit           *kvrpcpb.CommitResponse
	Cleanup          *kvrpcpb.CleanupResponse
	BatchGet         *kvrpcpb.BatchGetResponse
	BatchRollback    *kvrpcpb.BatchRollbackResponse
	ScanLock         *kvrpcpb.ScanLockResponse
	ResolveLock      *kvrpcpb.ResolveLockResponse
	GC               *kvrpcpb.GCResponse
	DeleteRange      *kvrpcpb.DeleteRangeResponse
	RawGet           *kvrpcpb.RawGetResponse
	RawPut           *kvrpcpb.RawPutResponse
	RawDelete        *kvrpcpb.RawDeleteResponse
	RawDeleteRange   *kvrpcpb.RawDeleteRangeResponse
	RawScan          *kvrpcpb.RawScanResponse
	Cop              *coprocessor.Response
	CopStream        *CopStreamResponse
	MvccGetByKey     *kvrpcpb.MvccGetByKeyResponse
	MvccGetByStartTS *kvrpcpb.MvccGetByStartTsResponse
	SplitRegion      *kvrpcpb.SplitRegionResponse
}

Response wraps all kv/coprocessor responses.

func CallRPC

func CallRPC(ctx context.Context, client tikvpb.TikvClient, req *Request) (*Response, error)

CallRPC launches a rpc call. ch is needed to implement timeout for coprocessor streaing, the stream object's cancel function will be sent to the channel, together with a lease checked by a background goroutine.

func GenRegionErrorResp

func GenRegionErrorResp(req *Request, e *errorpb.Error) (*Response, error)

GenRegionErrorResp returns corresponding Response with specified RegionError according to the given req.

func (*Response) GetRegionError

func (resp *Response) GetRegionError() (*errorpb.Error, error)

GetRegionError returns the RegionError of the underlying concrete response.