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// Copyright 2018 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
// 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 <>.
package ethdb
// IdealBatchSize defines the size of the data batches should ideally add in one
// write.
const IdealBatchSize = 100 * 1024
// Batch is a write-only database that commits changes to its host database
// when Write is called. A batch cannot be used concurrently.
type Batch interface {
// ValueSize retrieves the amount of data queued up for writing.
ValueSize() int
// Write flushes any accumulated data to disk.
Write() error
// Reset resets the batch for reuse.
// Replay replays the batch contents.
Replay(w KeyValueWriter) error
// Batcher wraps the NewBatch method of a backing data store.
type Batcher interface {
// NewBatch creates a write-only database that buffers changes to its host db
// until a final write is called.
NewBatch() Batch
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