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129 lines
3.5 KiB
129 lines
3.5 KiB
package abcicli
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import (
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"fmt"
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"sync"
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"github.com/tendermint/abci/types"
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cmn "github.com/tendermint/tmlibs/common"
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)
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const (
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dialRetryIntervalSeconds = 3
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echoRetryIntervalSeconds = 1
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)
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// Client defines an interface for an ABCI client.
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// All `Async` methods return a `ReqRes` object.
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// All `Sync` methods return the appropriate protobuf ResponseXxx struct and an error.
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// Note these are client errors, eg. ABCI socket connectivity issues.
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// Application-related errors are reflected in response via ABCI error codes and logs.
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type Client interface {
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cmn.Service
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SetResponseCallback(Callback)
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Error() error
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FlushAsync() *ReqRes
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EchoAsync(msg string) *ReqRes
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InfoAsync(types.RequestInfo) *ReqRes
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SetOptionAsync(types.RequestSetOption) *ReqRes
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DeliverTxAsync(tx []byte) *ReqRes
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CheckTxAsync(tx []byte) *ReqRes
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QueryAsync(types.RequestQuery) *ReqRes
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CommitAsync() *ReqRes
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InitChainAsync(types.RequestInitChain) *ReqRes
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BeginBlockAsync(types.RequestBeginBlock) *ReqRes
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EndBlockAsync(types.RequestEndBlock) *ReqRes
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FlushSync() error
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EchoSync(msg string) (*types.ResponseEcho, error)
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InfoSync(types.RequestInfo) (*types.ResponseInfo, error)
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SetOptionSync(types.RequestSetOption) (*types.ResponseSetOption, error)
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DeliverTxSync(tx []byte) (*types.ResponseDeliverTx, error)
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CheckTxSync(tx []byte) (*types.ResponseCheckTx, error)
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QuerySync(types.RequestQuery) (*types.ResponseQuery, error)
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CommitSync() (*types.ResponseCommit, error)
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InitChainSync(types.RequestInitChain) (*types.ResponseInitChain, error)
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BeginBlockSync(types.RequestBeginBlock) (*types.ResponseBeginBlock, error)
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EndBlockSync(types.RequestEndBlock) (*types.ResponseEndBlock, error)
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}
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//----------------------------------------
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// NewClient returns a new ABCI client of the specified transport type.
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// It returns an error if the transport is not "socket" or "grpc"
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func NewClient(addr, transport string, mustConnect bool) (client Client, err error) {
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switch transport {
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case "socket":
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client = NewSocketClient(addr, mustConnect)
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case "grpc":
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client = NewGRPCClient(addr, mustConnect)
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default:
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err = fmt.Errorf("Unknown abci transport %s", transport)
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}
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return
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}
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//----------------------------------------
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type Callback func(*types.Request, *types.Response)
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//----------------------------------------
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type ReqRes struct {
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*types.Request
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*sync.WaitGroup
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*types.Response // Not set atomically, so be sure to use WaitGroup.
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mtx sync.Mutex
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done bool // Gets set to true once *after* WaitGroup.Done().
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cb func(*types.Response) // A single callback that may be set.
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}
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func NewReqRes(req *types.Request) *ReqRes {
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return &ReqRes{
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Request: req,
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WaitGroup: waitGroup1(),
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Response: nil,
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done: false,
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cb: nil,
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}
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}
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// Sets the callback for this ReqRes atomically.
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// If reqRes is already done, calls cb immediately.
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// NOTE: reqRes.cb should not change if reqRes.done.
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// NOTE: only one callback is supported.
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func (reqRes *ReqRes) SetCallback(cb func(res *types.Response)) {
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reqRes.mtx.Lock()
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if reqRes.done {
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reqRes.mtx.Unlock()
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cb(reqRes.Response)
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return
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}
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defer reqRes.mtx.Unlock()
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reqRes.cb = cb
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}
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func (reqRes *ReqRes) GetCallback() func(*types.Response) {
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reqRes.mtx.Lock()
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defer reqRes.mtx.Unlock()
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return reqRes.cb
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}
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// NOTE: it should be safe to read reqRes.cb without locks after this.
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func (reqRes *ReqRes) SetDone() {
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reqRes.mtx.Lock()
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reqRes.done = true
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reqRes.mtx.Unlock()
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}
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func waitGroup1() (wg *sync.WaitGroup) {
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wg = &sync.WaitGroup{}
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wg.Add(1)
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return
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}
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