447 lines
11 KiB
Go
447 lines
11 KiB
Go
package abcicli
|
|
|
|
import (
|
|
"bufio"
|
|
"container/list"
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
"reflect"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/tendermint/abci/types"
|
|
cmn "github.com/tendermint/tmlibs/common"
|
|
)
|
|
|
|
const (
|
|
OK = types.CodeType_OK
|
|
LOG = ""
|
|
)
|
|
|
|
const reqQueueSize = 256 // TODO make configurable
|
|
const maxResponseSize = 1048576 // 1MB TODO make configurable
|
|
const flushThrottleMS = 20 // Don't wait longer than...
|
|
|
|
// This is goroutine-safe, but users should beware that
|
|
// the application in general is not meant to be interfaced
|
|
// with concurrent callers.
|
|
type socketClient struct {
|
|
cmn.BaseService
|
|
|
|
reqQueue chan *ReqRes
|
|
flushTimer *cmn.ThrottleTimer
|
|
mustConnect bool
|
|
|
|
mtx sync.Mutex
|
|
addr string
|
|
conn net.Conn
|
|
err error
|
|
reqSent *list.List
|
|
resCb func(*types.Request, *types.Response) // listens to all callbacks
|
|
|
|
}
|
|
|
|
func NewSocketClient(addr string, mustConnect bool) (*socketClient, error) {
|
|
cli := &socketClient{
|
|
reqQueue: make(chan *ReqRes, reqQueueSize),
|
|
flushTimer: cmn.NewThrottleTimer("socketClient", flushThrottleMS),
|
|
mustConnect: mustConnect,
|
|
|
|
addr: addr,
|
|
reqSent: list.New(),
|
|
resCb: nil,
|
|
}
|
|
cli.BaseService = *cmn.NewBaseService(nil, "socketClient", cli)
|
|
|
|
_, err := cli.Start() // Just start it, it's confusing for callers to remember to start.
|
|
return cli, err
|
|
}
|
|
|
|
func (cli *socketClient) OnStart() error {
|
|
cli.BaseService.OnStart()
|
|
|
|
var err error
|
|
var conn net.Conn
|
|
RETRY_LOOP:
|
|
for {
|
|
conn, err = cmn.Connect(cli.addr)
|
|
if err != nil {
|
|
if cli.mustConnect {
|
|
return err
|
|
}
|
|
log.Warn(fmt.Sprintf("abci.socketClient failed to connect to %v. Retrying...", cli.addr))
|
|
time.Sleep(time.Second * 3)
|
|
continue RETRY_LOOP
|
|
}
|
|
cli.conn = conn
|
|
|
|
go cli.sendRequestsRoutine(conn)
|
|
go cli.recvResponseRoutine(conn)
|
|
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func (cli *socketClient) OnStop() {
|
|
cli.BaseService.OnStop()
|
|
|
|
cli.mtx.Lock()
|
|
defer cli.mtx.Unlock()
|
|
if cli.conn != nil {
|
|
cli.conn.Close()
|
|
}
|
|
|
|
cli.flushQueue()
|
|
}
|
|
|
|
// Stop the client and set the error
|
|
func (cli *socketClient) StopForError(err error) {
|
|
cli.mtx.Lock()
|
|
if !cli.IsRunning() {
|
|
return
|
|
}
|
|
|
|
if cli.err == nil {
|
|
cli.err = err
|
|
}
|
|
cli.mtx.Unlock()
|
|
|
|
log.Warn(fmt.Sprintf("Stopping abci.socketClient for error: %v", err.Error()))
|
|
cli.Stop()
|
|
}
|
|
|
|
func (cli *socketClient) Error() error {
|
|
cli.mtx.Lock()
|
|
defer cli.mtx.Unlock()
|
|
return cli.err
|
|
}
|
|
|
|
// Set listener for all responses
|
|
// NOTE: callback may get internally generated flush responses.
|
|
func (cli *socketClient) SetResponseCallback(resCb Callback) {
|
|
cli.mtx.Lock()
|
|
defer cli.mtx.Unlock()
|
|
cli.resCb = resCb
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
func (cli *socketClient) sendRequestsRoutine(conn net.Conn) {
|
|
|
|
w := bufio.NewWriter(conn)
|
|
for {
|
|
select {
|
|
case <-cli.flushTimer.Ch:
|
|
select {
|
|
case cli.reqQueue <- NewReqRes(types.ToRequestFlush()):
|
|
default:
|
|
// Probably will fill the buffer, or retry later.
|
|
}
|
|
case <-cli.BaseService.Quit:
|
|
return
|
|
case reqres := <-cli.reqQueue:
|
|
cli.willSendReq(reqres)
|
|
err := types.WriteMessage(reqres.Request, w)
|
|
if err != nil {
|
|
cli.StopForError(fmt.Errorf("Error writing msg: %v", err))
|
|
return
|
|
}
|
|
// log.Debug("Sent request", "requestType", reflect.TypeOf(reqres.Request), "request", reqres.Request)
|
|
if _, ok := reqres.Request.Value.(*types.Request_Flush); ok {
|
|
err = w.Flush()
|
|
if err != nil {
|
|
cli.StopForError(fmt.Errorf("Error flushing writer: %v", err))
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (cli *socketClient) recvResponseRoutine(conn net.Conn) {
|
|
|
|
r := bufio.NewReader(conn) // Buffer reads
|
|
for {
|
|
var res = &types.Response{}
|
|
err := types.ReadMessage(r, res)
|
|
if err != nil {
|
|
cli.StopForError(err)
|
|
return
|
|
}
|
|
switch r := res.Value.(type) {
|
|
case *types.Response_Exception:
|
|
// XXX After setting cli.err, release waiters (e.g. reqres.Done())
|
|
cli.StopForError(errors.New(r.Exception.Error))
|
|
return
|
|
default:
|
|
// log.Debug("Received response", "responseType", reflect.TypeOf(res), "response", res)
|
|
err := cli.didRecvResponse(res)
|
|
if err != nil {
|
|
cli.StopForError(err)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (cli *socketClient) willSendReq(reqres *ReqRes) {
|
|
cli.mtx.Lock()
|
|
defer cli.mtx.Unlock()
|
|
cli.reqSent.PushBack(reqres)
|
|
}
|
|
|
|
func (cli *socketClient) didRecvResponse(res *types.Response) error {
|
|
cli.mtx.Lock()
|
|
defer cli.mtx.Unlock()
|
|
|
|
// Get the first ReqRes
|
|
next := cli.reqSent.Front()
|
|
if next == nil {
|
|
return fmt.Errorf("Unexpected result type %v when nothing expected", reflect.TypeOf(res.Value))
|
|
}
|
|
reqres := next.Value.(*ReqRes)
|
|
if !resMatchesReq(reqres.Request, res) {
|
|
return fmt.Errorf("Unexpected result type %v when response to %v expected",
|
|
reflect.TypeOf(res.Value), reflect.TypeOf(reqres.Request.Value))
|
|
}
|
|
|
|
reqres.Response = res // Set response
|
|
reqres.Done() // Release waiters
|
|
cli.reqSent.Remove(next) // Pop first item from linked list
|
|
|
|
// Notify reqRes listener if set
|
|
if cb := reqres.GetCallback(); cb != nil {
|
|
cb(res)
|
|
}
|
|
|
|
// Notify client listener if set
|
|
if cli.resCb != nil {
|
|
cli.resCb(reqres.Request, res)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
func (cli *socketClient) EchoAsync(msg string) *ReqRes {
|
|
return cli.queueRequest(types.ToRequestEcho(msg))
|
|
}
|
|
|
|
func (cli *socketClient) FlushAsync() *ReqRes {
|
|
return cli.queueRequest(types.ToRequestFlush())
|
|
}
|
|
|
|
func (cli *socketClient) InfoAsync() *ReqRes {
|
|
return cli.queueRequest(types.ToRequestInfo())
|
|
}
|
|
|
|
func (cli *socketClient) SetOptionAsync(key string, value string) *ReqRes {
|
|
return cli.queueRequest(types.ToRequestSetOption(key, value))
|
|
}
|
|
|
|
func (cli *socketClient) DeliverTxAsync(tx []byte) *ReqRes {
|
|
return cli.queueRequest(types.ToRequestDeliverTx(tx))
|
|
}
|
|
|
|
func (cli *socketClient) CheckTxAsync(tx []byte) *ReqRes {
|
|
return cli.queueRequest(types.ToRequestCheckTx(tx))
|
|
}
|
|
|
|
func (cli *socketClient) QueryAsync(reqQuery types.RequestQuery) *ReqRes {
|
|
return cli.queueRequest(types.ToRequestQuery(reqQuery))
|
|
}
|
|
|
|
func (cli *socketClient) CommitAsync() *ReqRes {
|
|
return cli.queueRequest(types.ToRequestCommit())
|
|
}
|
|
|
|
func (cli *socketClient) InitChainAsync(validators []*types.Validator) *ReqRes {
|
|
return cli.queueRequest(types.ToRequestInitChain(validators))
|
|
}
|
|
|
|
func (cli *socketClient) BeginBlockAsync(hash []byte, header *types.Header) *ReqRes {
|
|
return cli.queueRequest(types.ToRequestBeginBlock(hash, header))
|
|
}
|
|
|
|
func (cli *socketClient) EndBlockAsync(height uint64) *ReqRes {
|
|
return cli.queueRequest(types.ToRequestEndBlock(height))
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
func (cli *socketClient) EchoSync(msg string) (res types.Result) {
|
|
reqres := cli.queueRequest(types.ToRequestEcho(msg))
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return types.ErrInternalError.SetLog(err.Error())
|
|
}
|
|
resp := reqres.Response.GetEcho()
|
|
return types.Result{Code: OK, Data: []byte(resp.Message)}
|
|
}
|
|
|
|
func (cli *socketClient) FlushSync() error {
|
|
reqRes := cli.queueRequest(types.ToRequestFlush())
|
|
if err := cli.Error(); err != nil {
|
|
return types.ErrInternalError.SetLog(err.Error())
|
|
}
|
|
reqRes.Wait() // NOTE: if we don't flush the queue, its possible to get stuck here
|
|
return cli.Error()
|
|
}
|
|
|
|
func (cli *socketClient) InfoSync() (resInfo types.ResponseInfo, err error) {
|
|
reqres := cli.queueRequest(types.ToRequestInfo())
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return resInfo, err
|
|
}
|
|
if resInfo_ := reqres.Response.GetInfo(); resInfo_ != nil {
|
|
return *resInfo_, nil
|
|
}
|
|
return resInfo, nil
|
|
}
|
|
|
|
func (cli *socketClient) SetOptionSync(key string, value string) (res types.Result) {
|
|
reqres := cli.queueRequest(types.ToRequestSetOption(key, value))
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return types.ErrInternalError.SetLog(err.Error())
|
|
}
|
|
resp := reqres.Response.GetSetOption()
|
|
return types.Result{Code: OK, Data: nil, Log: resp.Log}
|
|
}
|
|
|
|
func (cli *socketClient) DeliverTxSync(tx []byte) (res types.Result) {
|
|
reqres := cli.queueRequest(types.ToRequestDeliverTx(tx))
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return types.ErrInternalError.SetLog(err.Error())
|
|
}
|
|
resp := reqres.Response.GetDeliverTx()
|
|
return types.Result{Code: resp.Code, Data: resp.Data, Log: resp.Log}
|
|
}
|
|
|
|
func (cli *socketClient) CheckTxSync(tx []byte) (res types.Result) {
|
|
reqres := cli.queueRequest(types.ToRequestCheckTx(tx))
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return types.ErrInternalError.SetLog(err.Error())
|
|
}
|
|
resp := reqres.Response.GetCheckTx()
|
|
return types.Result{Code: resp.Code, Data: resp.Data, Log: resp.Log}
|
|
}
|
|
|
|
func (cli *socketClient) QuerySync(reqQuery types.RequestQuery) (resQuery types.ResponseQuery, err error) {
|
|
reqres := cli.queueRequest(types.ToRequestQuery(reqQuery))
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return resQuery, err
|
|
}
|
|
if resQuery_ := reqres.Response.GetQuery(); resQuery_ != nil {
|
|
return *resQuery_, nil
|
|
}
|
|
return resQuery, nil
|
|
}
|
|
|
|
func (cli *socketClient) CommitSync() (res types.Result) {
|
|
reqres := cli.queueRequest(types.ToRequestCommit())
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return types.ErrInternalError.SetLog(err.Error())
|
|
}
|
|
resp := reqres.Response.GetCommit()
|
|
return types.Result{Code: resp.Code, Data: resp.Data, Log: resp.Log}
|
|
}
|
|
|
|
func (cli *socketClient) InitChainSync(validators []*types.Validator) (err error) {
|
|
cli.queueRequest(types.ToRequestInitChain(validators))
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (cli *socketClient) BeginBlockSync(hash []byte, header *types.Header) (err error) {
|
|
cli.queueRequest(types.ToRequestBeginBlock(hash, header))
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (cli *socketClient) EndBlockSync(height uint64) (resEndBlock types.ResponseEndBlock, err error) {
|
|
reqres := cli.queueRequest(types.ToRequestEndBlock(height))
|
|
cli.FlushSync()
|
|
if err := cli.Error(); err != nil {
|
|
return resEndBlock, err
|
|
}
|
|
if blk := reqres.Response.GetEndBlock(); blk != nil {
|
|
return *blk, nil
|
|
}
|
|
return resEndBlock, nil
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
func (cli *socketClient) queueRequest(req *types.Request) *ReqRes {
|
|
reqres := NewReqRes(req)
|
|
|
|
// TODO: set cli.err if reqQueue times out
|
|
cli.reqQueue <- reqres
|
|
|
|
// Maybe auto-flush, or unset auto-flush
|
|
switch req.Value.(type) {
|
|
case *types.Request_Flush:
|
|
cli.flushTimer.Unset()
|
|
default:
|
|
cli.flushTimer.Set()
|
|
}
|
|
|
|
return reqres
|
|
}
|
|
|
|
func (cli *socketClient) flushQueue() {
|
|
LOOP:
|
|
for {
|
|
select {
|
|
case reqres := <-cli.reqQueue:
|
|
reqres.Done()
|
|
default:
|
|
break LOOP
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
func resMatchesReq(req *types.Request, res *types.Response) (ok bool) {
|
|
switch req.Value.(type) {
|
|
case *types.Request_Echo:
|
|
_, ok = res.Value.(*types.Response_Echo)
|
|
case *types.Request_Flush:
|
|
_, ok = res.Value.(*types.Response_Flush)
|
|
case *types.Request_Info:
|
|
_, ok = res.Value.(*types.Response_Info)
|
|
case *types.Request_SetOption:
|
|
_, ok = res.Value.(*types.Response_SetOption)
|
|
case *types.Request_DeliverTx:
|
|
_, ok = res.Value.(*types.Response_DeliverTx)
|
|
case *types.Request_CheckTx:
|
|
_, ok = res.Value.(*types.Response_CheckTx)
|
|
case *types.Request_Commit:
|
|
_, ok = res.Value.(*types.Response_Commit)
|
|
case *types.Request_Query:
|
|
_, ok = res.Value.(*types.Response_Query)
|
|
case *types.Request_InitChain:
|
|
_, ok = res.Value.(*types.Response_InitChain)
|
|
case *types.Request_BeginBlock:
|
|
_, ok = res.Value.(*types.Response_BeginBlock)
|
|
case *types.Request_EndBlock:
|
|
_, ok = res.Value.(*types.Response_EndBlock)
|
|
}
|
|
return ok
|
|
}
|