45 lines
1.5 KiB
Go
45 lines
1.5 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
|
|
|
|
// Code using batches should try to add this much data to the batch.
|
|
// The value was determined empirically.
|
|
const IdealBatchSize = 100 * 1024
|
|
|
|
// Putter wraps the database write operation supported by both batches and regular databases.
|
|
type Putter interface {
|
|
Put(key []byte, value []byte) error
|
|
}
|
|
|
|
// Database wraps all database operations. All methods are safe for concurrent use.
|
|
type Database interface {
|
|
Putter
|
|
Get(key []byte) ([]byte, error)
|
|
Has(key []byte) (bool, error)
|
|
Delete(key []byte) error
|
|
Close()
|
|
NewBatch() Batch
|
|
}
|
|
|
|
// Batch is a write-only database that commits changes to its host database
|
|
// when Write is called. Batch cannot be used concurrently.
|
|
type Batch interface {
|
|
Putter
|
|
ValueSize() int // amount of data in the batch
|
|
Write() error
|
|
}
|