release: v0.3.2 — 质量加固 + SQL扩展 + 表达式 + 并发同步
v0.2.6 质量加固: - 修复 AriaEngine 二级索引 SSTable 互相覆盖(命名空间隔离) - 修复 LSM 多版本读取顺序错误 + MergeIterator 取最新来源 - 重写 LZ4 压缩器(往返一致性 + 缓冲区溢出) - sstableCache LRU 上限 + 预加载兜底(BufferPool 配置生效) - 修复 React/Vue 集成 import type 运行时 bug + exports 子路径 - 新增 38 个测试(LZ4往返/Crypto/集成), 删除伪测试 v0.3.0 SQL 功能扩展: - 多语句 parseAll + 事务语句 BEGIN/COMMIT/ROLLBACK - INSERT INTO ... SELECT + UNION/UNION ALL + EXISTS 关联子查询 - CREATE/DROP INDEX 五引擎实现 + 别名 WHERE 修复 - benchmark 页面 + 36 个新测试 v0.3.1 表达式与性能: - CASE WHEN 表达式(SELECT 列/WHERE/聚合) - JOIN + 关联子查询逐行绑定 - WAL 批量组提交(写放大 O(N)→O(1)) - 修复 pending frozen 可见性 + flush 缓存竞争 v0.3.2 并发: - CASE WHEN 用于 WHERE/聚合 + JOIN 哈希连接 - 多标签页同步(multiTabSync + BroadcastChannel) - IndexedDB schema 持久化(reopen 后表结构恢复) - 修复 where-matcher 顶层 $not - 修复 CJS 产物 .js 被 ESM 解析(exports 空) — .cjs 后缀 + exports 修正 - 836 测试 / 44 套件 / 81.0% 覆盖率
This commit is contained in:
thzxx
+313
-283
@@ -1,283 +1,313 @@
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/**
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* AriaEngine WAL — Write-Ahead Log
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* @module engine/aria/wal/log
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*
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* 崩溃恢复前的写操作持久化日志。
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*
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* WAL 文件格式:
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* ┌──────────┬──────────────┬──────────┐
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* │ Record 1│ Record 2 │ ... │
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* │ 4B LSN │ │ │
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* │ 1B type │ │ │
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* │ 4B txnId│ │ │
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* │ 2B tblLen│ │ │
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* │ N table│ │ │
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* │ 2B keyLen│ │ │
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* │ N key │ │ │
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* │ 4B jsonLen│ │ │
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* │ N json │ │ │
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* │ 4B CRC │ │ │
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* └──────────┴──────────────┴──────────┘
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*/
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import { WALRecordType, type WALRecord } from '../types';
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import type { BufferPool } from '../buffer/pool';
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// ---------------------------------------------------------------------------
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// WAL 存储接口
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// ---------------------------------------------------------------------------
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export interface WALStore {
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/** 追加 WAL 记录 */
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append(data: Uint8Array): Promise<void>;
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/** 读取所有 WAL 记录 */
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readAll(): Promise<Uint8Array>;
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/** 截断 WAL（checkpoint 后清理） */
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truncate(): Promise<void>;
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/** 检查 WAL 是否存在 */
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exists(): Promise<boolean>;
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}
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// ---------------------------------------------------------------------------
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// WAL
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// ---------------------------------------------------------------------------
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export class WAL {
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private lsn = 0;
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private store: WALStore;
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private enabled: boolean;
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private buffer: Uint8Array[] = [];
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private syncMode: 'full' | 'batch' | 'none';
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constructor(store: WALStore, enabled: boolean = true, syncMode: 'full' | 'batch' | 'none' = 'batch') {
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this.store = store;
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this.enabled = enabled;
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this.syncMode = syncMode;
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}
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// =======================================================================
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// 写入
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// =======================================================================
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/** 追加一条 WAL 记录（full 模式同步等待写入完成） */
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async append(record: Omit<WALRecord, 'lsn' | 'checksum'>): Promise<void> {
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if (!this.enabled) return;
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this.lsn++;
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const fullRecord: WALRecord = {
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...record,
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lsn: this.lsn,
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checksum: 0, // 稍后计算
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};
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const bytes = this.encodeRecord(fullRecord);
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if (this.syncMode === 'full') {
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try {
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await this.store.append(bytes);
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} catch {
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// eslint-disable-next-line no-console
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console.warn('[AriaEngine WAL] Failed to append record');
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}
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} else if (this.syncMode === 'batch') {
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this.buffer.push(bytes);
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}
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// 'none' mode: 不写 WAL
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}
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/** 批量刷新缓冲的 WAL 记录 */
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async flush(): Promise<void> {
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if (!this.enabled || this.buffer.length === 0) return;
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const totalLen = this.buffer.reduce((sum, b) => sum + b.byteLength, 0);
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const combined = new Uint8Array(totalLen);
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let offset = 0;
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for (const buf of this.buffer) {
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combined.set(buf, offset);
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offset += buf.byteLength;
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}
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await this.store.append(combined);
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this.buffer = [];
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}
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// =======================================================================
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// 恢复
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// =======================================================================
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/** 从 WAL 恢复未提交的事务数据 */
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async recover(
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applyRecord: (record: WALRecord) => void,
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): Promise<number> {
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if (!this.enabled) return 0;
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const exists = await this.store.exists();
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if (!exists) return 0;
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const data = await this.store.readAll();
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if (data.byteLength === 0) return 0;
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const records = this.decodeAllRecords(data);
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for (const record of records) {
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applyRecord(record);
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}
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this.lsn = records.length > 0 ? records[records.length - 1].lsn : 0;
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return records.length;
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}
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// =======================================================================
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// Checkpoint
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// =======================================================================
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/** Checkpoint 后清空 WAL */
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async checkpoint(): Promise<void> {
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if (!this.enabled) return;
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await this.flush();
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await this.store.truncate();
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this.lsn = 0;
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}
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// =======================================================================
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// 统计
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// =======================================================================
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isEnabled(): boolean {
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return this.enabled;
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}
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getLSN(): number {
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return this.lsn;
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}
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getBufferedCount(): number {
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return this.buffer.length;
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}
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// -----------------------------------------------------------------------
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// 编解码
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// -----------------------------------------------------------------------
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private encodeRecord(record: WALRecord): Uint8Array {
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const encoder = new TextEncoder();
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const tableBytes = encoder.encode(record.tableName);
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const keyBytes = encoder.encode(record.key);
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const jsonStr = record.data ? JSON.stringify(record.data) : '';
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const jsonBytes = encoder.encode(jsonStr);
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const size =
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4 + // LSN
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1 + // type
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4 + // txnId
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2 + tableBytes.length + // table
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2 + keyBytes.length + // key
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4 + jsonBytes.length + // json
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4; // CRC
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const buf = new ArrayBuffer(size);
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const view = new DataView(buf);
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let offset = 0;
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view.setUint32(offset, record.lsn, false);
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offset += 4;
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view.setUint8(offset, record.type);
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offset += 1;
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view.setUint32(offset, record.txnId, false);
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offset += 4;
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view.setUint16(offset, tableBytes.length, false);
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offset += 2;
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new Uint8Array(buf).set(tableBytes, offset);
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offset += tableBytes.length;
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view.setUint16(offset, keyBytes.length, false);
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offset += 2;
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new Uint8Array(buf).set(keyBytes, offset);
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offset += keyBytes.length;
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view.setUint32(offset, jsonBytes.length, false);
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offset += 4;
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new Uint8Array(buf).set(jsonBytes, offset);
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offset += jsonBytes.length;
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// 简单 CRC
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let crc = 0;
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const u8 = new Uint8Array(buf, 0, offset);
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for (let i = 0; i < u8.length; i++) {
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crc = ((crc << 5) - crc + u8[i]) | 0;
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}
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view.setUint32(offset, crc >>> 0, false);
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return new Uint8Array(buf);
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}
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private decodeAllRecords(data: Uint8Array): WALRecord[] {
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const records: WALRecord[] = [];
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const view = new DataView(data.buffer, data.byteOffset, data.byteLength);
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let offset = 0;
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while (offset + 15 <= data.byteLength) {
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try {
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const recordStart = offset;
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const lsn = view.getUint32(offset, false);
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offset += 4;
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const type = view.getUint8(offset) as WALRecordType;
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offset += 1;
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const txnId = view.getUint32(offset, false);
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offset += 4;
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const tableLen = view.getUint16(offset, false);
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offset += 2;
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if (offset + tableLen > data.byteLength) break;
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const tableName = new TextDecoder().decode(data.slice(offset, offset + tableLen));
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offset += tableLen;
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const keyLen = view.getUint16(offset, false);
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offset += 2;
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if (offset + keyLen > data.byteLength) break;
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const key = new TextDecoder().decode(data.slice(offset, offset + keyLen));
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offset += keyLen;
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const jsonLen = view.getUint32(offset, false);
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offset += 4;
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if (offset + jsonLen > data.byteLength) break;
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let recordData: Record<string, unknown> | undefined;
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if (jsonLen > 0) {
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const json = new TextDecoder().decode(data.slice(offset, offset + jsonLen));
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try {
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recordData = JSON.parse(json);
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} catch { /* ok */ }
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}
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offset += jsonLen;
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// 验证 CRC（跨记录数据计算，不含 CRC 自身）
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const storedCrc = view.getUint32(offset, false);
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offset += 4;
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const recordBytes = data.slice(recordStart, offset - 4);
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let computedCrc = 0;
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for (let i = 0; i < recordBytes.length; i++) {
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computedCrc = ((computedCrc << 5) - computedCrc + recordBytes[i]) | 0;
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}
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if ((computedCrc >>> 0) !== storedCrc) {
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// CRC 不匹配，跳过此损坏记录
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console.warn(`[AriaEngine WAL] CRC mismatch at record LSN=${lsn}, skipping`);
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continue;
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}
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records.push({
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lsn,
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type,
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txnId,
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tableName,
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key,
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data: recordData,
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checksum: storedCrc,
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});
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} catch {
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break;
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}
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}
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return records;
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}
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}
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/**
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* AriaEngine WAL — Write-Ahead Log
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* @module engine/aria/wal/log
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*
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* 崩溃恢复前的写操作持久化日志。
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*
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* WAL 文件格式:
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* ┌──────────┬──────────────┬──────────┐
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* │ Record 1│ Record 2 │ ... │
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* │ 4B LSN │ │ │
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* │ 1B type │ │ │
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* │ 4B txnId│ │ │
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* │ 2B tblLen│ │ │
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* │ N table│ │ │
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* │ 2B keyLen│ │ │
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* │ N key │ │ │
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* │ 4B jsonLen│ │ │
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* │ N json │ │ │
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* │ 4B CRC │ │ │
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* └──────────┴──────────────┴──────────┘
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*/
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import { WALRecordType, type WALRecord } from '../types';
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// ---------------------------------------------------------------------------
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// WAL 存储接口
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// ---------------------------------------------------------------------------
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export interface WALStore {
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/** 追加 WAL 记录 */
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append(data: Uint8Array): Promise<void>;
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/** 读取所有 WAL 记录 */
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readAll(): Promise<Uint8Array>;
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/** 截断 WAL（checkpoint 后清理） */
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truncate(): Promise<void>;
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/** 检查 WAL 是否存在 */
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exists(): Promise<boolean>;
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}
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// ---------------------------------------------------------------------------
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// WAL
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// ---------------------------------------------------------------------------
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export class WAL {
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private lsn = 0;
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private store: WALStore;
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private enabled: boolean;
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private buffer: Uint8Array[] = [];
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private syncMode: 'full' | 'batch' | 'none';
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constructor(store: WALStore, enabled: boolean = true, syncMode: 'full' | 'batch' | 'none' = 'batch') {
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this.store = store;
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this.enabled = enabled;
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this.syncMode = syncMode;
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}
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// =======================================================================
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// 写入
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// =======================================================================
|
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/** 追加一条 WAL 记录（full 模式同步等待写入完成） */
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async append(record: Omit<WALRecord, 'lsn' | 'checksum'>): Promise<void> {
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if (!this.enabled) return;
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this.lsn++;
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const fullRecord: WALRecord = {
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...record,
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lsn: this.lsn,
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checksum: 0, // 稍后计算
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};
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const bytes = this.encodeRecord(fullRecord);
|
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|
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if (this.syncMode === 'full') {
|
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try {
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await this.store.append(bytes);
|
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} catch {
|
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// eslint-disable-next-line no-console
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console.warn('[AriaEngine WAL] Failed to append record');
|
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}
|
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} else if (this.syncMode === 'batch') {
|
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this.buffer.push(bytes);
|
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}
|
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// 'none' mode: 不写 WAL
|
||||
}
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||||
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/** 批量追加多条 WAL 记录（组提交：合并为一次底层写入，v0.3.1） */
|
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async appendBatch(records: Omit<WALRecord, 'lsn' | 'checksum'>[]): Promise<void> {
|
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if (!this.enabled || records.length === 0) return;
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const chunks: Uint8Array[] = [];
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for (const record of records) {
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this.lsn++;
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chunks.push(this.encodeRecord({ ...record, lsn: this.lsn, checksum: 0 }));
|
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}
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const combined = this.mergeChunks(chunks);
|
||||
|
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if (this.syncMode === 'full') {
|
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try {
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await this.store.append(combined);
|
||||
} catch {
|
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// eslint-disable-next-line no-console
|
||||
console.warn('[AriaEngine WAL] Failed to append batch record');
|
||||
}
|
||||
} else if (this.syncMode === 'batch') {
|
||||
this.buffer.push(combined);
|
||||
}
|
||||
// 'none' mode: 不写 WAL
|
||||
}
|
||||
|
||||
/** 批量刷新缓冲的 WAL 记录 */
|
||||
async flush(): Promise<void> {
|
||||
if (!this.enabled || this.buffer.length === 0) return;
|
||||
|
||||
const combined = this.mergeChunks(this.buffer);
|
||||
await this.store.append(combined);
|
||||
this.buffer = [];
|
||||
}
|
||||
|
||||
/** 合并多个字节块为一个连续缓冲区 */
|
||||
private mergeChunks(chunks: Uint8Array[]): Uint8Array {
|
||||
if (chunks.length === 1) return chunks[0];
|
||||
const totalLen = chunks.reduce((sum, b) => sum + b.byteLength, 0);
|
||||
const combined = new Uint8Array(totalLen);
|
||||
let offset = 0;
|
||||
for (const buf of chunks) {
|
||||
combined.set(buf, offset);
|
||||
offset += buf.byteLength;
|
||||
}
|
||||
return combined;
|
||||
}
|
||||
|
||||
// =======================================================================
|
||||
// 恢复
|
||||
// =======================================================================
|
||||
|
||||
/** 从 WAL 恢复未提交的事务数据 */
|
||||
async recover(
|
||||
applyRecord: (record: WALRecord) => void,
|
||||
): Promise<number> {
|
||||
if (!this.enabled) return 0;
|
||||
|
||||
const exists = await this.store.exists();
|
||||
if (!exists) return 0;
|
||||
|
||||
const data = await this.store.readAll();
|
||||
if (data.byteLength === 0) return 0;
|
||||
|
||||
const records = this.decodeAllRecords(data);
|
||||
for (const record of records) {
|
||||
applyRecord(record);
|
||||
}
|
||||
|
||||
this.lsn = records.length > 0 ? records[records.length - 1].lsn : 0;
|
||||
return records.length;
|
||||
}
|
||||
|
||||
// =======================================================================
|
||||
// Checkpoint
|
||||
// =======================================================================
|
||||
|
||||
/** Checkpoint 后清空 WAL */
|
||||
async checkpoint(): Promise<void> {
|
||||
if (!this.enabled) return;
|
||||
await this.flush();
|
||||
await this.store.truncate();
|
||||
this.lsn = 0;
|
||||
}
|
||||
|
||||
// =======================================================================
|
||||
// 统计
|
||||
// =======================================================================
|
||||
|
||||
isEnabled(): boolean {
|
||||
return this.enabled;
|
||||
}
|
||||
|
||||
getLSN(): number {
|
||||
return this.lsn;
|
||||
}
|
||||
|
||||
getBufferedCount(): number {
|
||||
return this.buffer.length;
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------------
|
||||
// 编解码
|
||||
// -----------------------------------------------------------------------
|
||||
|
||||
private encodeRecord(record: WALRecord): Uint8Array {
|
||||
const encoder = new TextEncoder();
|
||||
const tableBytes = encoder.encode(record.tableName);
|
||||
const keyBytes = encoder.encode(record.key);
|
||||
const jsonStr = record.data ? JSON.stringify(record.data) : '';
|
||||
const jsonBytes = encoder.encode(jsonStr);
|
||||
|
||||
const size =
|
||||
4 + // LSN
|
||||
1 + // type
|
||||
4 + // txnId
|
||||
2 + tableBytes.length + // table
|
||||
2 + keyBytes.length + // key
|
||||
4 + jsonBytes.length + // json
|
||||
4; // CRC
|
||||
|
||||
const buf = new ArrayBuffer(size);
|
||||
const view = new DataView(buf);
|
||||
let offset = 0;
|
||||
|
||||
view.setUint32(offset, record.lsn, false);
|
||||
offset += 4;
|
||||
view.setUint8(offset, record.type);
|
||||
offset += 1;
|
||||
view.setUint32(offset, record.txnId, false);
|
||||
offset += 4;
|
||||
|
||||
view.setUint16(offset, tableBytes.length, false);
|
||||
offset += 2;
|
||||
new Uint8Array(buf).set(tableBytes, offset);
|
||||
offset += tableBytes.length;
|
||||
|
||||
view.setUint16(offset, keyBytes.length, false);
|
||||
offset += 2;
|
||||
new Uint8Array(buf).set(keyBytes, offset);
|
||||
offset += keyBytes.length;
|
||||
|
||||
view.setUint32(offset, jsonBytes.length, false);
|
||||
offset += 4;
|
||||
new Uint8Array(buf).set(jsonBytes, offset);
|
||||
offset += jsonBytes.length;
|
||||
|
||||
// 简单 CRC
|
||||
let crc = 0;
|
||||
const u8 = new Uint8Array(buf, 0, offset);
|
||||
for (let i = 0; i < u8.length; i++) {
|
||||
crc = ((crc << 5) - crc + u8[i]) | 0;
|
||||
}
|
||||
view.setUint32(offset, crc >>> 0, false);
|
||||
|
||||
return new Uint8Array(buf);
|
||||
}
|
||||
|
||||
private decodeAllRecords(data: Uint8Array): WALRecord[] {
|
||||
const records: WALRecord[] = [];
|
||||
const view = new DataView(data.buffer, data.byteOffset, data.byteLength);
|
||||
let offset = 0;
|
||||
|
||||
while (offset + 15 <= data.byteLength) {
|
||||
try {
|
||||
const recordStart = offset;
|
||||
const lsn = view.getUint32(offset, false);
|
||||
offset += 4;
|
||||
const type = view.getUint8(offset) as WALRecordType;
|
||||
offset += 1;
|
||||
const txnId = view.getUint32(offset, false);
|
||||
offset += 4;
|
||||
|
||||
const tableLen = view.getUint16(offset, false);
|
||||
offset += 2;
|
||||
if (offset + tableLen > data.byteLength) break;
|
||||
const tableName = new TextDecoder().decode(data.slice(offset, offset + tableLen));
|
||||
offset += tableLen;
|
||||
|
||||
const keyLen = view.getUint16(offset, false);
|
||||
offset += 2;
|
||||
if (offset + keyLen > data.byteLength) break;
|
||||
const key = new TextDecoder().decode(data.slice(offset, offset + keyLen));
|
||||
offset += keyLen;
|
||||
|
||||
const jsonLen = view.getUint32(offset, false);
|
||||
offset += 4;
|
||||
if (offset + jsonLen > data.byteLength) break;
|
||||
let recordData: Record<string, unknown> | undefined;
|
||||
if (jsonLen > 0) {
|
||||
const json = new TextDecoder().decode(data.slice(offset, offset + jsonLen));
|
||||
try {
|
||||
recordData = JSON.parse(json);
|
||||
} catch { /* ok */ }
|
||||
}
|
||||
offset += jsonLen;
|
||||
|
||||
// 验证 CRC（跨记录数据计算，不含 CRC 自身）
|
||||
const storedCrc = view.getUint32(offset, false);
|
||||
offset += 4;
|
||||
const recordBytes = data.slice(recordStart, offset - 4);
|
||||
let computedCrc = 0;
|
||||
for (let i = 0; i < recordBytes.length; i++) {
|
||||
computedCrc = ((computedCrc << 5) - computedCrc + recordBytes[i]) | 0;
|
||||
}
|
||||
if ((computedCrc >>> 0) !== storedCrc) {
|
||||
// CRC 不匹配，跳过此损坏记录
|
||||
// eslint-disable-next-line no-console
|
||||
console.warn(`[AriaEngine WAL] CRC mismatch at record LSN=${lsn}, skipping`);
|
||||
continue;
|
||||
}
|
||||
|
||||
records.push({
|
||||
lsn,
|
||||
type,
|
||||
txnId,
|
||||
tableName,
|
||||
key,
|
||||
data: recordData,
|
||||
checksum: storedCrc,
|
||||
});
|
||||
} catch {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return records;
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user