You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
586 lines
15 KiB
586 lines
15 KiB
package abciclient
|
|
|
|
import (
|
|
"bufio"
|
|
"container/list"
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"reflect"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/tendermint/tendermint/abci/types"
|
|
"github.com/tendermint/tendermint/libs/log"
|
|
tmnet "github.com/tendermint/tendermint/libs/net"
|
|
"github.com/tendermint/tendermint/libs/service"
|
|
)
|
|
|
|
const (
|
|
// reqQueueSize is the max number of queued async requests.
|
|
// (memory: 256MB max assuming 1MB transactions)
|
|
reqQueueSize = 256
|
|
)
|
|
|
|
type reqResWithContext struct {
|
|
R *ReqRes
|
|
C context.Context // if context.Err is not nil, reqRes will be thrown away (ignored)
|
|
}
|
|
|
|
// 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 {
|
|
service.BaseService
|
|
logger log.Logger
|
|
|
|
addr string
|
|
mustConnect bool
|
|
conn net.Conn
|
|
|
|
reqQueue chan *reqResWithContext
|
|
|
|
mtx sync.Mutex
|
|
err error
|
|
reqSent *list.List // list of requests sent, waiting for response
|
|
resCb func(*types.Request, *types.Response) // called on all requests, if set.
|
|
}
|
|
|
|
var _ Client = (*socketClient)(nil)
|
|
|
|
// NewSocketClient creates a new socket client, which connects to a given
|
|
// address. If mustConnect is true, the client will return an error upon start
|
|
// if it fails to connect.
|
|
func NewSocketClient(logger log.Logger, addr string, mustConnect bool) Client {
|
|
cli := &socketClient{
|
|
logger: logger,
|
|
reqQueue: make(chan *reqResWithContext, reqQueueSize),
|
|
mustConnect: mustConnect,
|
|
addr: addr,
|
|
reqSent: list.New(),
|
|
resCb: nil,
|
|
}
|
|
cli.BaseService = *service.NewBaseService(logger, "socketClient", cli)
|
|
return cli
|
|
}
|
|
|
|
// OnStart implements Service by connecting to the server and spawning reading
|
|
// and writing goroutines.
|
|
func (cli *socketClient) OnStart(ctx context.Context) error {
|
|
var (
|
|
err error
|
|
conn net.Conn
|
|
)
|
|
|
|
for {
|
|
conn, err = tmnet.Connect(cli.addr)
|
|
if err != nil {
|
|
if cli.mustConnect {
|
|
return err
|
|
}
|
|
cli.logger.Error(fmt.Sprintf("abci.socketClient failed to connect to %v. Retrying after %vs...",
|
|
cli.addr, dialRetryIntervalSeconds), "err", err)
|
|
time.Sleep(time.Second * dialRetryIntervalSeconds)
|
|
continue
|
|
}
|
|
cli.conn = conn
|
|
|
|
go cli.sendRequestsRoutine(ctx, conn)
|
|
go cli.recvResponseRoutine(ctx, conn)
|
|
|
|
return nil
|
|
}
|
|
}
|
|
|
|
// OnStop implements Service by closing connection and flushing all queues.
|
|
func (cli *socketClient) OnStop() {
|
|
if cli.conn != nil {
|
|
cli.conn.Close()
|
|
}
|
|
|
|
cli.drainQueue()
|
|
}
|
|
|
|
// Error returns an error if the client was stopped abruptly.
|
|
func (cli *socketClient) Error() error {
|
|
cli.mtx.Lock()
|
|
defer cli.mtx.Unlock()
|
|
return cli.err
|
|
}
|
|
|
|
// SetResponseCallback sets a callback, which will be executed for each
|
|
// non-error & non-empty response from the server.
|
|
//
|
|
// 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(ctx context.Context, conn io.Writer) {
|
|
bw := bufio.NewWriter(conn)
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
case reqres := <-cli.reqQueue:
|
|
if ctx.Err() != nil {
|
|
return
|
|
}
|
|
|
|
if reqres.C.Err() != nil {
|
|
cli.logger.Debug("Request's context is done", "req", reqres.R, "err", reqres.C.Err())
|
|
continue
|
|
}
|
|
cli.willSendReq(reqres.R)
|
|
|
|
if err := types.WriteMessage(reqres.R.Request, bw); err != nil {
|
|
cli.stopForError(fmt.Errorf("write to buffer: %w", err))
|
|
return
|
|
}
|
|
if err := bw.Flush(); err != nil {
|
|
cli.stopForError(fmt.Errorf("flush buffer: %w", err))
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (cli *socketClient) recvResponseRoutine(ctx context.Context, conn io.Reader) {
|
|
r := bufio.NewReader(conn)
|
|
for {
|
|
if ctx.Err() != nil {
|
|
return
|
|
}
|
|
var res = &types.Response{}
|
|
err := types.ReadMessage(r, res)
|
|
if err != nil {
|
|
cli.stopForError(fmt.Errorf("read message: %w", err))
|
|
return
|
|
}
|
|
|
|
// cli.logger.Debug("Received response", "responseType", reflect.TypeOf(res), "response", res)
|
|
|
|
switch r := res.Value.(type) {
|
|
case *types.Response_Exception: // app responded with error
|
|
// XXX After setting cli.err, release waiters (e.g. reqres.Done())
|
|
cli.stopForError(errors.New(r.Exception.Error))
|
|
return
|
|
default:
|
|
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 %v when nothing expected", reflect.TypeOf(res.Value))
|
|
}
|
|
|
|
reqres := next.Value.(*ReqRes)
|
|
if !resMatchesReq(reqres.Request, res) {
|
|
return fmt.Errorf("unexpected %v when response to %v expected",
|
|
reflect.TypeOf(res.Value), reflect.TypeOf(reqres.Request.Value))
|
|
}
|
|
|
|
reqres.Response = res
|
|
reqres.Done() // release waiters
|
|
cli.reqSent.Remove(next) // pop first item from linked list
|
|
|
|
// Notify client listener if set (global callback).
|
|
if cli.resCb != nil {
|
|
cli.resCb(reqres.Request, res)
|
|
}
|
|
|
|
// Notify reqRes listener if set (request specific callback).
|
|
//
|
|
// NOTE: It is possible this callback isn't set on the reqres object. At this
|
|
// point, in which case it will be called after, when it is set.
|
|
reqres.InvokeCallback()
|
|
|
|
return nil
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
func (cli *socketClient) FlushAsync(ctx context.Context) (*ReqRes, error) {
|
|
return cli.queueRequestAsync(ctx, types.ToRequestFlush())
|
|
}
|
|
|
|
func (cli *socketClient) DeliverTxAsync(ctx context.Context, req types.RequestDeliverTx) (*ReqRes, error) {
|
|
return cli.queueRequestAsync(ctx, types.ToRequestDeliverTx(req))
|
|
}
|
|
|
|
func (cli *socketClient) CheckTxAsync(ctx context.Context, req types.RequestCheckTx) (*ReqRes, error) {
|
|
return cli.queueRequestAsync(ctx, types.ToRequestCheckTx(req))
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
func (cli *socketClient) Flush(ctx context.Context) error {
|
|
reqRes, err := cli.queueRequest(ctx, types.ToRequestFlush(), true)
|
|
if err != nil {
|
|
return queueErr(err)
|
|
}
|
|
|
|
if err := cli.Error(); err != nil {
|
|
return err
|
|
}
|
|
|
|
gotResp := make(chan struct{})
|
|
go func() {
|
|
// NOTE: if we don't flush the queue, its possible to get stuck here
|
|
reqRes.Wait()
|
|
close(gotResp)
|
|
}()
|
|
|
|
select {
|
|
case <-gotResp:
|
|
return cli.Error()
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
}
|
|
}
|
|
|
|
func (cli *socketClient) Echo(ctx context.Context, msg string) (*types.ResponseEcho, error) {
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestEcho(msg))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetEcho(), nil
|
|
}
|
|
|
|
func (cli *socketClient) Info(
|
|
ctx context.Context,
|
|
req types.RequestInfo,
|
|
) (*types.ResponseInfo, error) {
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestInfo(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetInfo(), nil
|
|
}
|
|
|
|
func (cli *socketClient) DeliverTx(
|
|
ctx context.Context,
|
|
req types.RequestDeliverTx,
|
|
) (*types.ResponseDeliverTx, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestDeliverTx(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetDeliverTx(), nil
|
|
}
|
|
|
|
func (cli *socketClient) CheckTx(
|
|
ctx context.Context,
|
|
req types.RequestCheckTx,
|
|
) (*types.ResponseCheckTx, error) {
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestCheckTx(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetCheckTx(), nil
|
|
}
|
|
|
|
func (cli *socketClient) Query(
|
|
ctx context.Context,
|
|
req types.RequestQuery,
|
|
) (*types.ResponseQuery, error) {
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestQuery(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetQuery(), nil
|
|
}
|
|
|
|
func (cli *socketClient) Commit(ctx context.Context) (*types.ResponseCommit, error) {
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestCommit())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetCommit(), nil
|
|
}
|
|
|
|
func (cli *socketClient) InitChain(
|
|
ctx context.Context,
|
|
req types.RequestInitChain,
|
|
) (*types.ResponseInitChain, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestInitChain(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetInitChain(), nil
|
|
}
|
|
|
|
func (cli *socketClient) BeginBlock(
|
|
ctx context.Context,
|
|
req types.RequestBeginBlock,
|
|
) (*types.ResponseBeginBlock, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestBeginBlock(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetBeginBlock(), nil
|
|
}
|
|
|
|
func (cli *socketClient) EndBlock(
|
|
ctx context.Context,
|
|
req types.RequestEndBlock,
|
|
) (*types.ResponseEndBlock, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestEndBlock(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetEndBlock(), nil
|
|
}
|
|
|
|
func (cli *socketClient) ListSnapshots(
|
|
ctx context.Context,
|
|
req types.RequestListSnapshots,
|
|
) (*types.ResponseListSnapshots, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestListSnapshots(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetListSnapshots(), nil
|
|
}
|
|
|
|
func (cli *socketClient) OfferSnapshot(
|
|
ctx context.Context,
|
|
req types.RequestOfferSnapshot,
|
|
) (*types.ResponseOfferSnapshot, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestOfferSnapshot(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetOfferSnapshot(), nil
|
|
}
|
|
|
|
func (cli *socketClient) LoadSnapshotChunk(
|
|
ctx context.Context,
|
|
req types.RequestLoadSnapshotChunk) (*types.ResponseLoadSnapshotChunk, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestLoadSnapshotChunk(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetLoadSnapshotChunk(), nil
|
|
}
|
|
|
|
func (cli *socketClient) ApplySnapshotChunk(
|
|
ctx context.Context,
|
|
req types.RequestApplySnapshotChunk) (*types.ResponseApplySnapshotChunk, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestApplySnapshotChunk(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetApplySnapshotChunk(), nil
|
|
}
|
|
|
|
func (cli *socketClient) PrepareProposal(
|
|
ctx context.Context,
|
|
req types.RequestPrepareProposal) (*types.ResponsePrepareProposal, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestPrepareProposal(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetPrepareProposal(), nil
|
|
}
|
|
|
|
func (cli *socketClient) ExtendVote(
|
|
ctx context.Context,
|
|
req types.RequestExtendVote) (*types.ResponseExtendVote, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestExtendVote(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetExtendVote(), nil
|
|
}
|
|
|
|
func (cli *socketClient) VerifyVoteExtension(
|
|
ctx context.Context,
|
|
req types.RequestVerifyVoteExtension) (*types.ResponseVerifyVoteExtension, error) {
|
|
|
|
reqres, err := cli.queueRequestAndFlush(ctx, types.ToRequestVerifyVoteExtension(req))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return reqres.Response.GetVerifyVoteExtension(), nil
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
// queueRequest enqueues req onto the queue. If the queue is full, it ether
|
|
// returns an error (sync=false) or blocks (sync=true).
|
|
//
|
|
// When sync=true, ctx can be used to break early. When sync=false, ctx will be
|
|
// used later to determine if request should be dropped (if ctx.Err is
|
|
// non-nil).
|
|
//
|
|
// The caller is responsible for checking cli.Error.
|
|
func (cli *socketClient) queueRequest(ctx context.Context, req *types.Request, sync bool) (*ReqRes, error) {
|
|
reqres := NewReqRes(req)
|
|
|
|
if sync {
|
|
select {
|
|
case cli.reqQueue <- &reqResWithContext{R: reqres, C: context.Background()}:
|
|
case <-ctx.Done():
|
|
return nil, ctx.Err()
|
|
}
|
|
} else {
|
|
select {
|
|
case cli.reqQueue <- &reqResWithContext{R: reqres, C: ctx}:
|
|
default:
|
|
return nil, errors.New("buffer is full")
|
|
}
|
|
}
|
|
|
|
return reqres, nil
|
|
}
|
|
|
|
func (cli *socketClient) queueRequestAsync(
|
|
ctx context.Context,
|
|
req *types.Request,
|
|
) (*ReqRes, error) {
|
|
|
|
reqres, err := cli.queueRequest(ctx, req, false)
|
|
if err != nil {
|
|
return nil, queueErr(err)
|
|
}
|
|
|
|
return reqres, cli.Error()
|
|
}
|
|
|
|
func (cli *socketClient) queueRequestAndFlush(
|
|
ctx context.Context,
|
|
req *types.Request,
|
|
) (*ReqRes, error) {
|
|
|
|
reqres, err := cli.queueRequest(ctx, req, true)
|
|
if err != nil {
|
|
return nil, queueErr(err)
|
|
}
|
|
|
|
if err := cli.Flush(ctx); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return reqres, cli.Error()
|
|
}
|
|
|
|
func queueErr(e error) error {
|
|
return fmt.Errorf("can't queue req: %w", e)
|
|
}
|
|
|
|
// drainQueue marks as complete and discards all remaining pending requests
|
|
// from the queue.
|
|
func (cli *socketClient) drainQueue() {
|
|
cli.mtx.Lock()
|
|
defer cli.mtx.Unlock()
|
|
|
|
// mark all in-flight messages as resolved (they will get cli.Error())
|
|
for req := cli.reqSent.Front(); req != nil; req = req.Next() {
|
|
reqres := req.Value.(*ReqRes)
|
|
reqres.Done()
|
|
}
|
|
|
|
// Mark all queued messages as resolved.
|
|
//
|
|
// TODO(creachadair): We can't simply range the channel, because it is never
|
|
// closed, and the writer continues to add work.
|
|
// See https://github.com/tendermint/tendermint/issues/6996.
|
|
for {
|
|
select {
|
|
case reqres := <-cli.reqQueue:
|
|
reqres.R.Done()
|
|
default:
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
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_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_PrepareProposal:
|
|
_, ok = res.Value.(*types.Response_PrepareProposal)
|
|
case *types.Request_ExtendVote:
|
|
_, ok = res.Value.(*types.Response_ExtendVote)
|
|
case *types.Request_VerifyVoteExtension:
|
|
_, ok = res.Value.(*types.Response_VerifyVoteExtension)
|
|
case *types.Request_BeginBlock:
|
|
_, ok = res.Value.(*types.Response_BeginBlock)
|
|
case *types.Request_EndBlock:
|
|
_, ok = res.Value.(*types.Response_EndBlock)
|
|
case *types.Request_ApplySnapshotChunk:
|
|
_, ok = res.Value.(*types.Response_ApplySnapshotChunk)
|
|
case *types.Request_LoadSnapshotChunk:
|
|
_, ok = res.Value.(*types.Response_LoadSnapshotChunk)
|
|
case *types.Request_ListSnapshots:
|
|
_, ok = res.Value.(*types.Response_ListSnapshots)
|
|
case *types.Request_OfferSnapshot:
|
|
_, ok = res.Value.(*types.Response_OfferSnapshot)
|
|
}
|
|
return ok
|
|
}
|
|
|
|
func (cli *socketClient) stopForError(err error) {
|
|
if !cli.IsRunning() {
|
|
return
|
|
}
|
|
|
|
cli.mtx.Lock()
|
|
cli.err = err
|
|
cli.mtx.Unlock()
|
|
|
|
cli.logger.Info("Stopping abci.socketClient", "reason", err)
|
|
if err := cli.Stop(); err != nil {
|
|
cli.logger.Error("error stopping abci.socketClient", "err", err)
|
|
}
|
|
}
|