mirror of https://github.com/poanetwork/gecko.git
39 lines
1.1 KiB
Go
39 lines
1.1 KiB
Go
// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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// For ease of implementation, our database's interface matches Ethereum's
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// database implementation. This was to allow use to use Geth code as is for the
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// EVM chain.
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package database
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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. A batch cannot be used concurrently.
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type Batch interface {
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KeyValueWriter
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// ValueSize retrieves the amount of data queued up for writing.
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ValueSize() int
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// Write flushes any accumulated data to disk.
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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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// Replay replays the batch contents.
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Replay(w KeyValueWriter) error
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// Inner returns a Batch writing to the inner database, if one exists. If
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// this batch is already writing to the base DB, then itself should be
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// returned.
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Inner() Batch
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}
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// Batcher wraps the NewBatch method of a backing data store.
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type Batcher interface {
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// NewBatch creates a write-only database that buffers changes to its host db
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// until a final write is called.
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NewBatch() Batch
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}
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