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55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Copyright 2016 The Noms Authors. All rights reserved.
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// Licensed under the Apache License, version 2.0:
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// http://www.apache.org/licenses/LICENSE-2.0
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package datas
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import (
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"github.com/attic-labs/noms/chunks"
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"github.com/attic-labs/noms/hash"
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"github.com/attic-labs/noms/types"
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)
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// Database provides versioned storage for noms values. Each Database instance represents one moment in history. Heads() returns the Commit from each active fork at that moment. The Commit() method returns a new Database, representing a new moment in history.
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type LocalDatabase struct {
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cch *cachingChunkHaver
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databaseCommon
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}
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func newLocalDatabase(cs chunks.ChunkStore) *LocalDatabase {
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return &LocalDatabase{
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newCachingChunkHaver(cs),
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newDatabaseCommon(types.NewValueStore(types.NewBatchStoreAdaptor(cs)), cs),
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}
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}
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func (lds *LocalDatabase) Commit(datasetID string, commit types.Struct) (Database, error) {
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err := lds.commit(datasetID, commit)
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lds.vs.Flush()
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return &LocalDatabase{
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lds.cch,
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newDatabaseCommon(lds.vs, lds.rt),
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}, err
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}
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func (lds *LocalDatabase) Delete(datasetID string) (Database, error) {
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err := lds.doDelete(datasetID)
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lds.vs.Flush()
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return &LocalDatabase{
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lds.cch,
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newDatabaseCommon(lds.vs, lds.rt),
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}, err
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}
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func (lds *LocalDatabase) has(r hash.Hash) bool {
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return lds.cch.Has(r)
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}
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func (lds *LocalDatabase) batchSink() batchSink {
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return lds.vs.BatchStore()
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}
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func (lds *LocalDatabase) batchStore() types.BatchStore {
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return lds.vs.BatchStore()
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}
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