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feat(kv): introduce KVBufferStore interface and implement it with lmdb
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dtfiedler
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Mar 21, 2024
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /** | ||
| * AR.IO ArNS Resolver | ||
| * Copyright (C) 2023 Permanent Data Solutions, Inc. All Rights Reserved. | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program 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 Affero General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| import { RootDatabase, open } from 'lmdb'; | ||
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| import { KVBufferStore } from '../types.js'; | ||
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| export class LmdbKVStore implements KVBufferStore { | ||
| private db: RootDatabase<Buffer, string>; | ||
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| constructor({ dbPath }: { dbPath: string }) { | ||
| this.db = open({ | ||
| path: dbPath, | ||
| encoding: 'binary', | ||
| commitDelay: 100, // 100ms delay - increases writes per transaction to reduce I/O | ||
| }); | ||
| } | ||
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| async get(key: string): Promise<Buffer | undefined> { | ||
| const value = this.db.get(key); | ||
| return value; | ||
| } | ||
|
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| async has(key: string): Promise<boolean> { | ||
| return this.db.doesExist(key); | ||
| } | ||
|
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| async del(key: string): Promise<void> { | ||
| if (await this.has(key)) { | ||
| await this.db.remove(key); | ||
| } | ||
| } | ||
|
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| async set(key: string, buffer: Buffer): Promise<void> { | ||
| await this.db.put(key, buffer); | ||
| } | ||
| } |
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