package proxy import ( "github.com/pkg/errors" cmn "github.com/tendermint/tendermint/libs/common" ) //----------------------------- // Tendermint's interface to the application consists of multiple connections type AppConns interface { cmn.Service Mempool() AppConnMempool Consensus() AppConnConsensus Query() AppConnQuery } func NewAppConns(clientCreator ClientCreator, handshaker Handshaker) AppConns { return NewMultiAppConn(clientCreator, handshaker) } //----------------------------- // multiAppConn implements AppConns type Handshaker interface { Handshake(AppConns) error } // a multiAppConn is made of a few appConns (mempool, consensus, query) // and manages their underlying abci clients, including the handshake // which ensures the app and tendermint are synced. // TODO: on app restart, clients must reboot together type multiAppConn struct { cmn.BaseService handshaker Handshaker mempoolConn *appConnMempool consensusConn *appConnConsensus queryConn *appConnQuery clientCreator ClientCreator } // Make all necessary abci connections to the application func NewMultiAppConn(clientCreator ClientCreator, handshaker Handshaker) *multiAppConn { multiAppConn := &multiAppConn{ handshaker: handshaker, clientCreator: clientCreator, } multiAppConn.BaseService = *cmn.NewBaseService(nil, "multiAppConn", multiAppConn) return multiAppConn } // Returns the mempool connection func (app *multiAppConn) Mempool() AppConnMempool { return app.mempoolConn } // Returns the consensus Connection func (app *multiAppConn) Consensus() AppConnConsensus { return app.consensusConn } // Returns the query Connection func (app *multiAppConn) Query() AppConnQuery { return app.queryConn } func (app *multiAppConn) OnStart() error { // query connection querycli, err := app.clientCreator.NewABCIClient() if err != nil { return errors.Wrap(err, "Error creating ABCI client (query connection)") } querycli.SetLogger(app.Logger.With("module", "abci-client", "connection", "query")) if err := querycli.Start(); err != nil { return errors.Wrap(err, "Error starting ABCI client (query connection)") } app.queryConn = NewAppConnQuery(querycli) // mempool connection memcli, err := app.clientCreator.NewABCIClient() if err != nil { return errors.Wrap(err, "Error creating ABCI client (mempool connection)") } memcli.SetLogger(app.Logger.With("module", "abci-client", "connection", "mempool")) if err := memcli.Start(); err != nil { return errors.Wrap(err, "Error starting ABCI client (mempool connection)") } app.mempoolConn = NewAppConnMempool(memcli) // consensus connection concli, err := app.clientCreator.NewABCIClient() if err != nil { return errors.Wrap(err, "Error creating ABCI client (consensus connection)") } concli.SetLogger(app.Logger.With("module", "abci-client", "connection", "consensus")) if err := concli.Start(); err != nil { return errors.Wrap(err, "Error starting ABCI client (consensus connection)") } app.consensusConn = NewAppConnConsensus(concli) // ensure app is synced to the latest state if app.handshaker != nil { return app.handshaker.Handshake(app) } return nil }