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chain_db.go
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chain_db.go
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package chain_db
import (
"errors"
"github.com/syndtr/goleveldb/leveldb"
errors2 "github.com/syndtr/goleveldb/leveldb/errors"
"github.com/vitelabs/go-vite/chain_db/access"
"github.com/vitelabs/go-vite/chain_db/database"
"github.com/vitelabs/go-vite/log15"
"os"
)
type ChainDb struct {
dbDir string
db *leveldb.DB
Ac *access.AccountChain
Sc *access.SnapshotChain
Account *access.Account
Be *access.BlockEvent
OnRoad *access.OnRoad
log log15.Logger
}
func NewChainDb(dbDir string) *ChainDb {
cDb := &ChainDb{
log: log15.New("module", "chainDb"),
dbDir: dbDir,
}
err := cDb.initDb()
if err != nil {
cDb.log.Error("initDb failed, error is "+err.Error(), "method", "NewChainDb")
return nil
}
return cDb
}
func (chainDb *ChainDb) initDb() error {
db, err := database.NewLevelDb(chainDb.dbDir)
if err != nil {
switch err.(type) {
case *errors2.ErrCorrupted:
return chainDb.ClearData()
default:
chainDb.log.Error("NewLevelDb failed, error is "+err.Error(), "method", "initDb")
return err
}
}
if db == nil {
err := errors.New("NewChainDb failed")
chainDb.log.Error(err.Error(), "method", "initDb")
return err
}
chainDb.db = db
chainDb.Ac = access.NewAccountChain(db)
chainDb.Sc = access.NewSnapshotChain(db)
chainDb.Account = access.NewAccount(db)
chainDb.Be = access.NewBlockEvent(db)
chainDb.OnRoad = access.NewOnRoad(db)
return nil
}
func (chainDb *ChainDb) ClearData() error {
if chainDb.db != nil {
if closeErr := chainDb.db.Close(); closeErr != nil {
return errors.New("Close db failed, error is " + closeErr.Error())
}
}
if err := os.RemoveAll(chainDb.dbDir); err != nil && err != os.ErrNotExist {
return errors.New("Remove " + chainDb.dbDir + " failed, error is " + err.Error())
}
chainDb.db = nil
return chainDb.initDb()
}
func (chainDb *ChainDb) Db() *leveldb.DB {
return chainDb.db
}
func (chainDb *ChainDb) Commit(batch *leveldb.Batch) error {
return chainDb.db.Write(batch, nil)
}