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47 lines
1.6 KiB
Go
47 lines
1.6 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package ethdb
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// Code using batches should try to add this much data to the batch.
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// The value was determined empirically.
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const IdealBatchSize = 100 * 1024
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// Putter wraps the database write operation supported by both batches and regular databases.
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type Putter interface {
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Put(key []byte, value []byte) error
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}
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// Database wraps all database operations. All methods are safe for concurrent use.
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type Database interface {
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Putter
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Get(key []byte) ([]byte, error)
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Has(key []byte) (bool, error)
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Delete(key []byte) error
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Close()
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NewBatch() Batch
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}
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// Batch is a write-only database that commits changes to its host database
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// when Write is called. Batch cannot be used concurrently.
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type Batch interface {
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Putter
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ValueSize() int // amount of data in the batch
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Write() error
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// Reset resets the batch for reuse
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Reset()
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}
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