13 "github.com/tendermint/abci/types"
14 cmn "github.com/tendermint/tmlibs/common"
18 OK = types.CodeType_OK
22 const reqQueueSize = 256 // TODO make configurable
23 // const maxResponseSize = 1048576 // 1MB TODO make configurable
24 const flushThrottleMS = 20 // Don't wait longer than...
26 // This is goroutine-safe, but users should beware that
27 // the application in general is not meant to be interfaced
28 // with concurrent callers.
29 type socketClient struct {
33 flushTimer *cmn.ThrottleTimer
41 resCb func(*types.Request, *types.Response) // listens to all callbacks
45 func NewSocketClient(addr string, mustConnect bool) *socketClient {
47 reqQueue: make(chan *ReqRes, reqQueueSize),
48 flushTimer: cmn.NewThrottleTimer("socketClient", flushThrottleMS),
49 mustConnect: mustConnect,
55 cli.BaseService = *cmn.NewBaseService(nil, "socketClient", cli)
59 func (cli *socketClient) OnStart() error {
60 if err := cli.BaseService.OnStart(); err != nil {
68 conn, err = cmn.Connect(cli.addr)
73 cli.Logger.Error(fmt.Sprintf("abci.socketClient failed to connect to %v. Retrying...", cli.addr))
74 time.Sleep(time.Second * 3)
79 go cli.sendRequestsRoutine(conn)
80 go cli.recvResponseRoutine(conn)
86 func (cli *socketClient) OnStop() {
87 cli.BaseService.OnStop()
90 defer cli.mtx.Unlock()
98 // Stop the client and set the error
99 func (cli *socketClient) StopForError(err error) {
100 if !cli.IsRunning() {
110 cli.Logger.Error(fmt.Sprintf("Stopping abci.socketClient for error: %v", err.Error()))
114 func (cli *socketClient) Error() error {
116 defer cli.mtx.Unlock()
120 // Set listener for all responses
121 // NOTE: callback may get internally generated flush responses.
122 func (cli *socketClient) SetResponseCallback(resCb Callback) {
124 defer cli.mtx.Unlock()
128 //----------------------------------------
130 func (cli *socketClient) sendRequestsRoutine(conn net.Conn) {
132 w := bufio.NewWriter(conn)
135 case <-cli.flushTimer.Ch:
137 case cli.reqQueue <- NewReqRes(types.ToRequestFlush()):
139 // Probably will fill the buffer, or retry later.
141 case <-cli.BaseService.Quit:
143 case reqres := <-cli.reqQueue:
144 cli.willSendReq(reqres)
145 err := types.WriteMessage(reqres.Request, w)
147 cli.StopForError(fmt.Errorf("Error writing msg: %v", err))
150 // cli.Logger.Debug("Sent request", "requestType", reflect.TypeOf(reqres.Request), "request", reqres.Request)
151 if _, ok := reqres.Request.Value.(*types.Request_Flush); ok {
154 cli.StopForError(fmt.Errorf("Error flushing writer: %v", err))
162 func (cli *socketClient) recvResponseRoutine(conn net.Conn) {
164 r := bufio.NewReader(conn) // Buffer reads
166 var res = &types.Response{}
167 err := types.ReadMessage(r, res)
169 cli.StopForError(err)
172 switch r := res.Value.(type) {
173 case *types.Response_Exception:
174 // XXX After setting cli.err, release waiters (e.g. reqres.Done())
175 cli.StopForError(errors.New(r.Exception.Error))
178 // cli.Logger.Debug("Received response", "responseType", reflect.TypeOf(res), "response", res)
179 err := cli.didRecvResponse(res)
181 cli.StopForError(err)
188 func (cli *socketClient) willSendReq(reqres *ReqRes) {
190 defer cli.mtx.Unlock()
191 cli.reqSent.PushBack(reqres)
194 func (cli *socketClient) didRecvResponse(res *types.Response) error {
196 defer cli.mtx.Unlock()
198 // Get the first ReqRes
199 next := cli.reqSent.Front()
201 return fmt.Errorf("Unexpected result type %v when nothing expected", reflect.TypeOf(res.Value))
203 reqres := next.Value.(*ReqRes)
204 if !resMatchesReq(reqres.Request, res) {
205 return fmt.Errorf("Unexpected result type %v when response to %v expected",
206 reflect.TypeOf(res.Value), reflect.TypeOf(reqres.Request.Value))
209 reqres.Response = res // Set response
210 reqres.Done() // Release waiters
211 cli.reqSent.Remove(next) // Pop first item from linked list
213 // Notify reqRes listener if set
214 if cb := reqres.GetCallback(); cb != nil {
218 // Notify client listener if set
219 if cli.resCb != nil {
220 cli.resCb(reqres.Request, res)
226 //----------------------------------------
228 func (cli *socketClient) EchoAsync(msg string) *ReqRes {
229 return cli.queueRequest(types.ToRequestEcho(msg))
232 func (cli *socketClient) FlushAsync() *ReqRes {
233 return cli.queueRequest(types.ToRequestFlush())
236 func (cli *socketClient) InfoAsync(req types.RequestInfo) *ReqRes {
237 return cli.queueRequest(types.ToRequestInfo(req))
240 func (cli *socketClient) SetOptionAsync(key string, value string) *ReqRes {
241 return cli.queueRequest(types.ToRequestSetOption(key, value))
244 func (cli *socketClient) DeliverTxAsync(tx []byte) *ReqRes {
245 return cli.queueRequest(types.ToRequestDeliverTx(tx))
248 func (cli *socketClient) CheckTxAsync(tx []byte) *ReqRes {
249 return cli.queueRequest(types.ToRequestCheckTx(tx))
252 func (cli *socketClient) QueryAsync(reqQuery types.RequestQuery) *ReqRes {
253 return cli.queueRequest(types.ToRequestQuery(reqQuery))
256 func (cli *socketClient) CommitAsync() *ReqRes {
257 return cli.queueRequest(types.ToRequestCommit())
260 func (cli *socketClient) InitChainAsync(params types.RequestInitChain) *ReqRes {
261 return cli.queueRequest(types.ToRequestInitChain(params))
264 func (cli *socketClient) BeginBlockAsync(params types.RequestBeginBlock) *ReqRes {
265 return cli.queueRequest(types.ToRequestBeginBlock(params))
268 func (cli *socketClient) EndBlockAsync(height uint64) *ReqRes {
269 return cli.queueRequest(types.ToRequestEndBlock(height))
272 //----------------------------------------
274 func (cli *socketClient) EchoSync(msg string) (res types.Result) {
275 reqres := cli.queueRequest(types.ToRequestEcho(msg))
277 if err := cli.Error(); err != nil {
278 return types.ErrInternalError.SetLog(err.Error())
280 resp := reqres.Response.GetEcho()
281 return types.Result{Code: OK, Data: []byte(resp.Message)}
284 func (cli *socketClient) FlushSync() error {
285 reqRes := cli.queueRequest(types.ToRequestFlush())
286 if err := cli.Error(); err != nil {
287 return types.ErrInternalError.SetLog(err.Error())
289 reqRes.Wait() // NOTE: if we don't flush the queue, its possible to get stuck here
293 func (cli *socketClient) InfoSync(req types.RequestInfo) (resInfo types.ResponseInfo, err error) {
294 reqres := cli.queueRequest(types.ToRequestInfo(req))
296 if err := cli.Error(); err != nil {
299 if resInfo_ := reqres.Response.GetInfo(); resInfo_ != nil {
300 return *resInfo_, nil
305 func (cli *socketClient) SetOptionSync(key string, value string) (res types.Result) {
306 reqres := cli.queueRequest(types.ToRequestSetOption(key, value))
308 if err := cli.Error(); err != nil {
309 return types.ErrInternalError.SetLog(err.Error())
311 resp := reqres.Response.GetSetOption()
312 return types.Result{Code: OK, Data: nil, Log: resp.Log}
315 func (cli *socketClient) DeliverTxSync(tx []byte) (res types.Result) {
316 reqres := cli.queueRequest(types.ToRequestDeliverTx(tx))
318 if err := cli.Error(); err != nil {
319 return types.ErrInternalError.SetLog(err.Error())
321 resp := reqres.Response.GetDeliverTx()
322 return types.Result{Code: resp.Code, Data: resp.Data, Log: resp.Log}
325 func (cli *socketClient) CheckTxSync(tx []byte) (res types.Result) {
326 reqres := cli.queueRequest(types.ToRequestCheckTx(tx))
328 if err := cli.Error(); err != nil {
329 return types.ErrInternalError.SetLog(err.Error())
331 resp := reqres.Response.GetCheckTx()
332 return types.Result{Code: resp.Code, Data: resp.Data, Log: resp.Log}
335 func (cli *socketClient) QuerySync(reqQuery types.RequestQuery) (resQuery types.ResponseQuery, err error) {
336 reqres := cli.queueRequest(types.ToRequestQuery(reqQuery))
338 if err := cli.Error(); err != nil {
341 if resQuery_ := reqres.Response.GetQuery(); resQuery_ != nil {
342 return *resQuery_, nil
347 func (cli *socketClient) CommitSync() (res types.Result) {
348 reqres := cli.queueRequest(types.ToRequestCommit())
350 if err := cli.Error(); err != nil {
351 return types.ErrInternalError.SetLog(err.Error())
353 resp := reqres.Response.GetCommit()
354 return types.Result{Code: resp.Code, Data: resp.Data, Log: resp.Log}
357 func (cli *socketClient) InitChainSync(params types.RequestInitChain) (err error) {
358 cli.queueRequest(types.ToRequestInitChain(params))
363 func (cli *socketClient) BeginBlockSync(params types.RequestBeginBlock) (err error) {
364 cli.queueRequest(types.ToRequestBeginBlock(params))
369 func (cli *socketClient) EndBlockSync(height uint64) (resEndBlock types.ResponseEndBlock, err error) {
370 reqres := cli.queueRequest(types.ToRequestEndBlock(height))
372 if err := cli.Error(); err != nil {
373 return resEndBlock, err
375 if blk := reqres.Response.GetEndBlock(); blk != nil {
378 return resEndBlock, nil
381 //----------------------------------------
383 func (cli *socketClient) queueRequest(req *types.Request) *ReqRes {
384 reqres := NewReqRes(req)
386 // TODO: set cli.err if reqQueue times out
387 cli.reqQueue <- reqres
389 // Maybe auto-flush, or unset auto-flush
390 switch req.Value.(type) {
391 case *types.Request_Flush:
392 cli.flushTimer.Unset()
400 func (cli *socketClient) flushQueue() {
404 case reqres := <-cli.reqQueue:
412 //----------------------------------------
414 func resMatchesReq(req *types.Request, res *types.Response) (ok bool) {
415 switch req.Value.(type) {
416 case *types.Request_Echo:
417 _, ok = res.Value.(*types.Response_Echo)
418 case *types.Request_Flush:
419 _, ok = res.Value.(*types.Response_Flush)
420 case *types.Request_Info:
421 _, ok = res.Value.(*types.Response_Info)
422 case *types.Request_SetOption:
423 _, ok = res.Value.(*types.Response_SetOption)
424 case *types.Request_DeliverTx:
425 _, ok = res.Value.(*types.Response_DeliverTx)
426 case *types.Request_CheckTx:
427 _, ok = res.Value.(*types.Response_CheckTx)
428 case *types.Request_Commit:
429 _, ok = res.Value.(*types.Response_Commit)
430 case *types.Request_Query:
431 _, ok = res.Value.(*types.Response_Query)
432 case *types.Request_InitChain:
433 _, ok = res.Value.(*types.Response_InitChain)
434 case *types.Request_BeginBlock:
435 _, ok = res.Value.(*types.Response_BeginBlock)
436 case *types.Request_EndBlock:
437 _, ok = res.Value.(*types.Response_EndBlock)