package abcicli import ( "context" "fmt" "sync" "github.com/tendermint/tendermint/abci/types" "github.com/tendermint/tendermint/libs/service" tmsync "github.com/tendermint/tendermint/libs/sync" ) const ( dialRetryIntervalSeconds = 3 echoRetryIntervalSeconds = 1 ) //go:generate mockery --case underscore --name Client // Client defines an interface for an ABCI client. // // All `Async` methods return a `ReqRes` object and an error. // All `Sync` methods return the appropriate protobuf ResponseXxx struct and an error. // // NOTE these are client errors, eg. ABCI socket connectivity issues. // Application-related errors are reflected in response via ABCI error codes // and logs. type Client interface { service.Service SetResponseCallback(Callback) Error() error // Asynchronous requests FlushAsync(context.Context) (*ReqRes, error) EchoAsync(ctx context.Context, msg string) (*ReqRes, error) InfoAsync(context.Context, types.RequestInfo) (*ReqRes, error) DeliverTxAsync(context.Context, types.RequestDeliverTx) (*ReqRes, error) CheckTxAsync(context.Context, types.RequestCheckTx) (*ReqRes, error) QueryAsync(context.Context, types.RequestQuery) (*ReqRes, error) CommitAsync(context.Context) (*ReqRes, error) InitChainAsync(context.Context, types.RequestInitChain) (*ReqRes, error) BeginBlockAsync(context.Context, types.RequestBeginBlock) (*ReqRes, error) EndBlockAsync(context.Context, types.RequestEndBlock) (*ReqRes, error) ListSnapshotsAsync(context.Context, types.RequestListSnapshots) (*ReqRes, error) OfferSnapshotAsync(context.Context, types.RequestOfferSnapshot) (*ReqRes, error) LoadSnapshotChunkAsync(context.Context, types.RequestLoadSnapshotChunk) (*ReqRes, error) ApplySnapshotChunkAsync(context.Context, types.RequestApplySnapshotChunk) (*ReqRes, error) // Synchronous requests FlushSync(context.Context) error EchoSync(ctx context.Context, msg string) (*types.ResponseEcho, error) InfoSync(context.Context, types.RequestInfo) (*types.ResponseInfo, error) DeliverTxSync(context.Context, types.RequestDeliverTx) (*types.ResponseDeliverTx, error) CheckTxSync(context.Context, types.RequestCheckTx) (*types.ResponseCheckTx, error) QuerySync(context.Context, types.RequestQuery) (*types.ResponseQuery, error) CommitSync(context.Context) (*types.ResponseCommit, error) InitChainSync(context.Context, types.RequestInitChain) (*types.ResponseInitChain, error) BeginBlockSync(context.Context, types.RequestBeginBlock) (*types.ResponseBeginBlock, error) EndBlockSync(context.Context, types.RequestEndBlock) (*types.ResponseEndBlock, error) ListSnapshotsSync(context.Context, types.RequestListSnapshots) (*types.ResponseListSnapshots, error) OfferSnapshotSync(context.Context, types.RequestOfferSnapshot) (*types.ResponseOfferSnapshot, error) LoadSnapshotChunkSync(context.Context, types.RequestLoadSnapshotChunk) (*types.ResponseLoadSnapshotChunk, error) ApplySnapshotChunkSync(context.Context, types.RequestApplySnapshotChunk) (*types.ResponseApplySnapshotChunk, error) } //---------------------------------------- // NewClient returns a new ABCI client of the specified transport type. // It returns an error if the transport is not "socket" or "grpc" func NewClient(addr, transport string, mustConnect bool) (client Client, err error) { switch transport { case "socket": client = NewSocketClient(addr, mustConnect) case "grpc": client = NewGRPCClient(addr, mustConnect) default: err = fmt.Errorf("unknown abci transport %s", transport) } return } type Callback func(*types.Request, *types.Response) type ReqRes struct { *types.Request *sync.WaitGroup *types.Response // Not set atomically, so be sure to use WaitGroup. mtx tmsync.Mutex done bool // Gets set to true once *after* WaitGroup.Done(). cb func(*types.Response) // A single callback that may be set. } func NewReqRes(req *types.Request) *ReqRes { return &ReqRes{ Request: req, WaitGroup: waitGroup1(), Response: nil, done: false, cb: nil, } } // Sets sets the callback. If reqRes is already done, it will call the cb // immediately. Note, reqRes.cb should not change if reqRes.done and only one // callback is supported. func (r *ReqRes) SetCallback(cb func(res *types.Response)) { r.mtx.Lock() if r.done { r.mtx.Unlock() cb(r.Response) return } r.cb = cb r.mtx.Unlock() } // InvokeCallback invokes a thread-safe execution of the configured callback // if non-nil. func (r *ReqRes) InvokeCallback() { r.mtx.Lock() defer r.mtx.Unlock() if r.cb != nil { r.cb(r.Response) } } // GetCallback returns the configured callback of the ReqRes object which may be // nil. Note, it is not safe to concurrently call this in cases where it is // marked done and SetCallback is called before calling GetCallback as that // will invoke the callback twice and create a potential race condition. // // ref: https://github.com/tendermint/tendermint/issues/5439 func (r *ReqRes) GetCallback() func(*types.Response) { r.mtx.Lock() defer r.mtx.Unlock() return r.cb } // SetDone marks the ReqRes object as done. func (r *ReqRes) SetDone() { r.mtx.Lock() r.done = true r.mtx.Unlock() } func waitGroup1() (wg *sync.WaitGroup) { wg = &sync.WaitGroup{} wg.Add(1) return }