erigon-pulse/ethdb/memory_database.go

85 lines
2.2 KiB
Go

// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package ethdb
import (
"github.com/ledgerwatch/bolt"
"github.com/ledgerwatch/turbo-geth/log"
)
func NewMemDatabase() *BoltDatabase {
logger := log.New("database", "in-memory")
// Open the db and recover any potential corruptions
db, err := bolt.Open("in-memory", 0600, &bolt.Options{MemOnly: true})
if err != nil {
panic(err)
}
return &BoltDatabase{
db: db,
log: logger,
}
}
func NewMemDatabase2() (*BoltDatabase, *bolt.DB) {
logger := log.New("database", "in-memory")
// Open the db and recover any potential corruptions
db, err := bolt.Open("in-memory", 0600, &bolt.Options{MemOnly: true})
if err != nil {
panic(err)
}
return &BoltDatabase{
db: db,
log: logger,
}, db
}
func (db *BoltDatabase) MemCopy() Database {
logger := log.New("database", "in-memory")
// Open the db and recover any potential corruptions
mem, err := bolt.Open("in-memory", 0600, &bolt.Options{MemOnly: true})
if err != nil {
panic(err)
}
if err := db.db.View(func(readTx *bolt.Tx) error {
return readTx.ForEach(func(name []byte, b *bolt.Bucket) error {
return mem.Update(func(writeTx *bolt.Tx) error {
newBucketToWrite, err := writeTx.CreateBucket(name, true)
if err != nil {
return err
}
return b.ForEach(func(k, v []byte) error {
if err := newBucketToWrite.Put(k, v); err != nil {
return err
}
return nil
})
})
})
}); err != nil {
panic(err)
}
return &BoltDatabase{
db: mem,
log: logger,
}
}