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persisterFactory.go
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/
persisterFactory.go
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package factory
import (
"errors"
"github.com/ElrondNetwork/elrond-go/config"
"github.com/ElrondNetwork/elrond-go/storage"
"github.com/ElrondNetwork/elrond-go/storage/leveldb"
"github.com/ElrondNetwork/elrond-go/storage/memorydb"
"github.com/ElrondNetwork/elrond-go/storage/storageUnit"
)
// PersisterFactory is the factory which will handle creating new databases
type PersisterFactory struct {
dbType string
batchDelaySeconds int
maxBatchSize int
maxOpenFiles int
}
// NewPersisterFactory will return a new instance of a PersisterFactory
func NewPersisterFactory(config config.DBConfig) *PersisterFactory {
return &PersisterFactory{
dbType: config.Type,
batchDelaySeconds: config.BatchDelaySeconds,
maxBatchSize: config.MaxBatchSize,
maxOpenFiles: config.MaxOpenFiles,
}
}
// Create will return a new instance of a DB with a given path
func (pf *PersisterFactory) Create(path string) (storage.Persister, error) {
if len(path) == 0 {
return nil, errors.New("invalid file path")
}
switch storageUnit.DBType(pf.dbType) {
case storageUnit.LvlDB:
return leveldb.NewDB(path, pf.batchDelaySeconds, pf.maxBatchSize, pf.maxOpenFiles)
case storageUnit.LvlDBSerial:
return leveldb.NewSerialDB(path, pf.batchDelaySeconds, pf.maxBatchSize, pf.maxOpenFiles)
case storageUnit.MemoryDB:
return memorydb.New(), nil
default:
return nil, storage.ErrNotSupportedDBType
}
}
// CreateDisabled will return a new disabled persister
func (pf *PersisterFactory) CreateDisabled() storage.Persister {
return &disabledPersister{}
}
// IsInterfaceNil returns true if there is no value under the interface
func (pf *PersisterFactory) IsInterfaceNil() bool {
return pf == nil
}