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constructors.go
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/
constructors.go
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package server
import (
"encoding/json"
"path/filepath"
abci "github.com/tendermint/abci/types"
dbm "github.com/tendermint/tmlibs/db"
"github.com/tendermint/tmlibs/log"
)
// AppCreator lets us lazily initialize app, using home dir
// and other flags (?) to start
type AppCreator func(string, log.Logger) (abci.Application, error)
// AppExporter dumps all app state to JSON-serializable structure
type AppExporter func(home string, log log.Logger) (json.RawMessage, error)
// ConstructAppCreator returns an application generation function
func ConstructAppCreator(appFn func(log.Logger, dbm.DB) abci.Application, name string) AppCreator {
return func(rootDir string, logger log.Logger) (abci.Application, error) {
dataDir := filepath.Join(rootDir, "data")
db, err := dbm.NewGoLevelDB(name, dataDir)
if err != nil {
return nil, err
}
app := appFn(logger, db)
return app, nil
}
}
// ConstructAppExporter returns an application export function
func ConstructAppExporter(appFn func(log.Logger, dbm.DB) (json.RawMessage, error), name string) AppExporter {
return func(rootDir string, logger log.Logger) (json.RawMessage, error) {
dataDir := filepath.Join(rootDir, "data")
db, err := dbm.NewGoLevelDB(name, dataDir)
if err != nil {
return nil, err
}
return appFn(logger, db)
}
}