Interface modified mmap to fd
This commit is contained in:
Eli-Class
@@ -1,106 +1,108 @@
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// src/index-file/protocol.ts
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import {
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INDEX_MAGIC,
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INDEX_VERSION,
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INDEX_HEADER_SIZE,
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INDEX_ENTRY_SIZE,
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FLAG_VALID,
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INDEX_MAGIC,
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INDEX_VERSION,
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INDEX_HEADER_SIZE,
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INDEX_ENTRY_SIZE,
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FLAG_VALID,
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} from './constants.js';
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import type { IndexHeader, IndexEntry } from './types.js';
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const CRC_TABLE = new Uint32Array(256);
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for (let i = 0; i < 256; i++) {
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let c = i;
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for (let j = 0; j < 8; j++) {
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c = (c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1);
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}
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CRC_TABLE[i] = c >>> 0;
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let c = i;
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for (let j = 0; j < 8; j++) {
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c = (c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1);
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}
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CRC_TABLE[i] = c >>> 0;
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}
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export function crc32(buf: Buffer, start = 0, end?: number): number {
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let crc = 0xFFFFFFFF;
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const len = end ?? buf.length;
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for (let i = start; i < len; i++) {
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crc = CRC_TABLE[(crc ^ buf[i]) & 0xFF] ^ (crc >>> 8);
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}
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return (~crc) >>> 0;
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let crc = 0xFFFFFFFF;
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const len = end ?? buf.length;
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for (let i = start; i < len; i++) {
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crc = CRC_TABLE[(crc ^ buf[i]) & 0xFF] ^ (crc >>> 8);
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}
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return (~crc) >>> 0;
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}
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export class IndexProtocol {
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static createHeader(entryCount: number, magic = INDEX_MAGIC): Buffer {
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const buf = Buffer.alloc(INDEX_HEADER_SIZE);
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buf.write(magic, 0, 4, 'ascii');
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buf.writeUInt32LE(INDEX_VERSION, 4);
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buf.writeBigUInt64LE(BigInt(Date.now()) * 1000000n, 8);
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buf.writeUInt32LE(INDEX_ENTRY_SIZE, 16);
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buf.writeUInt32LE(entryCount, 20);
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buf.writeUInt32LE(0, 24);
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buf.writeBigUInt64LE(0n, 28);
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buf.writeUInt32LE(0, 36);
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return buf;
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}
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static createHeader(entryCount: number, autoIncrementSequence: boolean, magic = INDEX_MAGIC): Buffer {
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const buf = Buffer.alloc(INDEX_HEADER_SIZE);
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buf.write(magic, 0, 4, 'ascii');
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buf.writeUInt32LE(INDEX_VERSION, 4);
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buf.writeBigUInt64LE(BigInt(Date.now()) * 1000000n, 8);
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buf.writeUInt32LE(INDEX_ENTRY_SIZE, 16);
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buf.writeUInt32LE(entryCount, 20);
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buf.writeUInt32LE(0, 24); // writtenCnt
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buf.writeBigUInt64LE(0n, 28); // dataFileSize
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buf.writeUInt32LE(0, 36); // latestSequence
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buf.writeUInt8(autoIncrementSequence ? 1 : 0, 40); // autoIncrementSequence
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return buf;
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}
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static readHeader(buf: Buffer): IndexHeader {
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return {
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magic: buf.toString('ascii', 0, 4),
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version: buf.readUInt32LE(4),
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createdAt: buf.readBigUInt64LE(8),
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entrySize: buf.readUInt32LE(16),
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entryCount: buf.readUInt32LE(20),
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validCount: buf.readUInt32LE(24),
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dataFileSize: buf.readBigUInt64LE(28),
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lastSequence: buf.readUInt32LE(36),
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reserved: buf.subarray(40, 64),
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};
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}
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static readHeader(buf: Buffer): IndexHeader {
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return {
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magic: buf.toString('ascii', 0, 4),
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version: buf.readUInt32LE(4),
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createdAt: buf.readBigUInt64LE(8),
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entrySize: buf.readUInt32LE(16),
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entryCount: buf.readUInt32LE(20),
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writtenCnt: buf.readUInt32LE(24),
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dataFileSize: buf.readBigUInt64LE(28),
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latestSequence: buf.readUInt32LE(36),
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autoIncrementSequence: buf.readUInt8(40) === 1,
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reserved: buf.subarray(41, 64),
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};
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}
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static updateHeaderCounts(
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buf: Buffer,
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validCount: number,
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dataFileSize: bigint,
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lastSequence: number
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): void {
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buf.writeUInt32LE(validCount, 24);
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buf.writeBigUInt64LE(dataFileSize, 28);
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buf.writeUInt32LE(lastSequence, 36);
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}
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static updateHeaderCounts(
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buf: Buffer,
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writtenCnt: number,
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dataFileSize: bigint,
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latestSequence: number
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): void {
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buf.writeUInt32LE(writtenCnt, 24);
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buf.writeBigUInt64LE(dataFileSize, 28);
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buf.writeUInt32LE(latestSequence, 36);
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}
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static writeEntry(buf: Buffer, index: number, entry: Omit<IndexEntry, 'checksum'>): void {
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const off = INDEX_HEADER_SIZE + index * INDEX_ENTRY_SIZE;
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static writeEntry(buf: Buffer, index: number, entry: Omit<IndexEntry, 'checksum'>): void {
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const off = INDEX_HEADER_SIZE + index * INDEX_ENTRY_SIZE;
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buf.writeUInt32LE(entry.sequence, off);
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buf.writeBigUInt64LE(entry.timestamp, off + 4);
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buf.writeBigUInt64LE(entry.offset, off + 12);
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buf.writeUInt32LE(entry.length, off + 20);
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buf.writeUInt32LE(entry.flags | FLAG_VALID, off + 24);
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buf.writeUInt32LE(entry.sequence, off);
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buf.writeBigUInt64LE(entry.timestamp, off + 4);
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buf.writeBigUInt64LE(entry.offset, off + 12);
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buf.writeUInt32LE(entry.length, off + 20);
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buf.writeUInt32LE(entry.flags | FLAG_VALID, off + 24);
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const checksum = crc32(buf, off, off + 28);
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buf.writeUInt32LE(checksum, off + 28);
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}
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const checksum = crc32(buf, off, off + 28);
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buf.writeUInt32LE(checksum, off + 28);
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}
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static readEntry(buf: Buffer, index: number): IndexEntry | null {
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const off = INDEX_HEADER_SIZE + index * INDEX_ENTRY_SIZE;
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const flags = buf.readUInt32LE(off + 24);
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static readEntry(buf: Buffer, index: number): IndexEntry | null {
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const off = INDEX_HEADER_SIZE + index * INDEX_ENTRY_SIZE;
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const flags = buf.readUInt32LE(off + 24);
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if (!(flags & FLAG_VALID)) return null;
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if (!(flags & FLAG_VALID)) return null;
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return {
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sequence: buf.readUInt32LE(off),
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timestamp: buf.readBigUInt64LE(off + 4),
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offset: buf.readBigUInt64LE(off + 12),
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length: buf.readUInt32LE(off + 20),
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flags,
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checksum: buf.readUInt32LE(off + 28),
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};
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}
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return {
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sequence: buf.readUInt32LE(off),
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timestamp: buf.readBigUInt64LE(off + 4),
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offset: buf.readBigUInt64LE(off + 12),
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length: buf.readUInt32LE(off + 20),
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flags,
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checksum: buf.readUInt32LE(off + 28),
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};
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}
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static isValidEntry(buf: Buffer, index: number): boolean {
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const off = INDEX_HEADER_SIZE + index * INDEX_ENTRY_SIZE;
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const flags = buf.readUInt32LE(off + 24);
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return (flags & FLAG_VALID) !== 0;
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}
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static isValidEntry(buf: Buffer, index: number): boolean {
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const off = INDEX_HEADER_SIZE + index * INDEX_ENTRY_SIZE;
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const flags = buf.readUInt32LE(off + 24);
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return (flags & FLAG_VALID) !== 0;
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}
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static calcFileSize(entryCount: number): number {
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return INDEX_HEADER_SIZE + INDEX_ENTRY_SIZE * entryCount;
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}
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}
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static calcFileSize(entryCount: number): number {
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return INDEX_HEADER_SIZE + INDEX_ENTRY_SIZE * entryCount;
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}
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}
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@@ -1,131 +1,114 @@
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// src/index-file/reader.ts
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import * as fs from 'node:fs';
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import mmap from '@elilee/mmap-native';
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import { IndexProtocol } from './protocol.js';
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import type { IndexHeader, IndexEntry } from './types.js';
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export class IndexReader {
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private fd: number | null = null;
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private buffer: Buffer | null = null;
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private header: IndexHeader | null = null;
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private buffer: Buffer | null = null;
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private header: IndexHeader | null = null;
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readonly path: string;
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readonly path: string;
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constructor(path: string) {
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this.path = path;
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}
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open(): void {
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const stats = fs.statSync(this.path);
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this.fd = fs.openSync(this.path, 'r');
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this.buffer = mmap.map(
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stats.size,
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mmap.PROT_READ,
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mmap.MAP_SHARED,
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this.fd,
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0
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);
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this.header = IndexProtocol.readHeader(this.buffer);
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}
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getHeader(): IndexHeader {
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if (!this.header) throw new Error('Index file not opened');
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return this.header;
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}
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getEntry(index: number): IndexEntry | null {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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if (index < 0 || index >= this.header.entryCount) return null;
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return IndexProtocol.readEntry(this.buffer, index);
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}
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findBySequence(sequence: number): { index: number; entry: IndexEntry } | null {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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for (let i = 0; i < this.header.validCount; i++) {
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const entry = IndexProtocol.readEntry(this.buffer, i);
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if (entry && entry.sequence === sequence) {
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return { index: i, entry };
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}
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}
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return null;
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}
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findBySequenceRange(startSeq: number, endSeq: number): { index: number; entry: IndexEntry }[] {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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const results: { index: number; entry: IndexEntry }[] = [];
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for (let i = 0; i < this.header.validCount; i++) {
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const entry = IndexProtocol.readEntry(this.buffer, i);
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if (entry && entry.sequence >= startSeq && entry.sequence <= endSeq) {
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results.push({ index: i, entry });
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}
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}
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return results;
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}
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getAllEntries(): IndexEntry[] {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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const entries: IndexEntry[] = [];
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for (let i = 0; i < this.header.validCount; i++) {
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const entry = IndexProtocol.readEntry(this.buffer, i);
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if (entry) entries.push(entry);
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}
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return entries;
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}
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findByTimeRange(startTs: bigint, endTs: bigint): { index: number; entry: IndexEntry }[] {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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const results: { index: number; entry: IndexEntry }[] = [];
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for (let i = 0; i < this.header.validCount; i++) {
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const entry = IndexProtocol.readEntry(this.buffer, i);
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if (entry && entry.timestamp >= startTs && entry.timestamp <= endTs) {
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results.push({ index: i, entry });
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}
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}
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return results;
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}
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binarySearchBySequence(targetSeq: number): { index: number; entry: IndexEntry } | null {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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let left = 0;
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let right = this.header.validCount - 1;
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while (left <= right) {
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const mid = Math.floor((left + right) / 2);
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const entry = IndexProtocol.readEntry(this.buffer, mid);
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if (!entry) {
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right = mid - 1;
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continue;
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}
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if (entry.sequence === targetSeq) {
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return { index: mid, entry };
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} else if (entry.sequence < targetSeq) {
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left = mid + 1;
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} else {
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right = mid - 1;
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}
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constructor(path: string) {
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this.path = path;
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}
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return null;
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}
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open(): void {
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// Read entire file into buffer (simpler than mmap for read-only access)
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this.buffer = fs.readFileSync(this.path);
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this.header = IndexProtocol.readHeader(this.buffer);
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}
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close(): void {
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if (this.buffer) {
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mmap.unmap(this.buffer);
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this.buffer = null;
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getHeader(): IndexHeader {
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if (!this.header) throw new Error('Index file not opened');
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return this.header;
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}
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if (this.fd !== null) {
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fs.closeSync(this.fd);
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this.fd = null;
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getEntry(index: number): IndexEntry | null {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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if (index < 0 || index >= this.header.entryCount) return null;
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return IndexProtocol.readEntry(this.buffer, index);
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}
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this.header = null;
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}
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}
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findBySequence(sequence: number): { index: number; entry: IndexEntry } | null {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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for (let i = 0; i < this.header.writtenCnt; i++) {
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const entry = IndexProtocol.readEntry(this.buffer, i);
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if (entry && entry.sequence === sequence) {
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return { index: i, entry };
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}
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}
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return null;
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}
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findBySequenceRange(startSeq: number, endSeq: number): { index: number; entry: IndexEntry }[] {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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const results: { index: number; entry: IndexEntry }[] = [];
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for (let i = 0; i < this.header.writtenCnt; i++) {
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const entry = IndexProtocol.readEntry(this.buffer, i);
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if (entry && entry.sequence >= startSeq && entry.sequence <= endSeq) {
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results.push({ index: i, entry });
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}
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}
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return results;
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}
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getAllEntries(): IndexEntry[] {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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const entries: IndexEntry[] = [];
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for (let i = 0; i < this.header.writtenCnt; i++) {
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const entry = IndexProtocol.readEntry(this.buffer, i);
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if (entry) entries.push(entry);
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}
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return entries;
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}
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findByTimeRange(startTs: bigint, endTs: bigint): { index: number; entry: IndexEntry }[] {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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const results: { index: number; entry: IndexEntry }[] = [];
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for (let i = 0; i < this.header.writtenCnt; i++) {
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const entry = IndexProtocol.readEntry(this.buffer, i);
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if (entry && entry.timestamp >= startTs && entry.timestamp <= endTs) {
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results.push({ index: i, entry });
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}
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}
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return results;
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}
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binarySearchBySequence(targetSeq: number): { index: number; entry: IndexEntry } | null {
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if (!this.buffer || !this.header) throw new Error('Index file not opened');
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let left = 0;
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let right = this.header.writtenCnt - 1;
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while (left <= right) {
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const mid = Math.floor((left + right) / 2);
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const entry = IndexProtocol.readEntry(this.buffer, mid);
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if (!entry) {
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right = mid - 1;
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continue;
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}
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if (entry.sequence === targetSeq) {
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return { index: mid, entry };
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} else if (entry.sequence < targetSeq) {
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left = mid + 1;
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} else {
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right = mid - 1;
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}
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}
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return null;
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}
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close(): void {
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// Simply release buffer reference (GC will handle cleanup)
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this.buffer = null;
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this.header = null;
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}
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}
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@@ -1,26 +1,29 @@
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// src/index-file/types.ts
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export interface IndexHeader {
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magic: string;
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version: number;
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createdAt: bigint;
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entrySize: number;
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entryCount: number;
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validCount: number;
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dataFileSize: bigint;
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lastSequence: number;
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reserved: Buffer;
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magic: string;
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version: number;
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createdAt: bigint;
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entrySize: number;
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entryCount: number;
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writtenCnt: number;
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dataFileSize: bigint;
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latestSequence: number;
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autoIncrementSequence: boolean;
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reserved: Buffer;
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}
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export interface IndexEntry {
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sequence: number;
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timestamp: bigint;
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offset: bigint;
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length: number;
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flags: number;
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checksum: number;
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sequence: number;
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timestamp: bigint;
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offset: bigint;
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length: number;
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flags: number;
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checksum: number;
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}
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export interface IndexFileOptions {
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maxEntries: number;
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magic?: string;
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}
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maxEntries?: number;
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autoIncrementSequence?: boolean;
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}
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export type IndexFileOptionsRequired = Required<IndexFileOptions>;
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@@ -1,141 +1,209 @@
|
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// src/index-file/writer.ts
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import * as fs from 'node:fs';
|
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import mmap from '@elilee/mmap-native';
|
||||
import { INDEX_HEADER_SIZE, FLAG_VALID } from './constants.js';
|
||||
import { INDEX_HEADER_SIZE, INDEX_ENTRY_SIZE, FLAG_VALID } from './constants.js';
|
||||
import { IndexProtocol } from './protocol.js';
|
||||
import type { IndexFileOptions } from './types.js';
|
||||
import { IndexFileOptionsRequired } from './types.js';
|
||||
|
||||
export class IndexWriter {
|
||||
private fd: number | null = null;
|
||||
private buffer: Buffer | null = null;
|
||||
private validCount = 0;
|
||||
private dataFileSize = 0n;
|
||||
private lastSequence = 0;
|
||||
private fd: number | null = null;
|
||||
private headerBuf: Buffer | null = null;
|
||||
private entryBuf: Buffer | null = null;
|
||||
|
||||
readonly path: string;
|
||||
readonly maxEntries: number;
|
||||
readonly fileSize: number;
|
||||
private writtenCnt = 0;
|
||||
private dataFileSize = 0n;
|
||||
private latestSequence = 0;
|
||||
|
||||
constructor(path: string, options: IndexFileOptions) {
|
||||
this.path = path;
|
||||
this.maxEntries = options.maxEntries;
|
||||
this.fileSize = IndexProtocol.calcFileSize(options.maxEntries);
|
||||
}
|
||||
private path: string | null = null;
|
||||
private fileSize: number = 0;
|
||||
|
||||
open(): void {
|
||||
const isNew = !fs.existsSync(this.path);
|
||||
// see IndexFileOptions
|
||||
private maxEntries: number = 0;
|
||||
private autoIncrementSequence: boolean = false;
|
||||
|
||||
this.fd = fs.openSync(this.path, isNew ? 'w+' : 'r+');
|
||||
|
||||
if (isNew) {
|
||||
fs.ftruncateSync(this.fd, this.fileSize);
|
||||
constructor(opt: IndexFileOptionsRequired) {
|
||||
// Empty constructor - maxEntries provided in open()
|
||||
this.maxEntries = opt.maxEntries;
|
||||
this.autoIncrementSequence = opt.autoIncrementSequence;
|
||||
}
|
||||
|
||||
this.buffer = mmap.map(
|
||||
this.fileSize,
|
||||
mmap.PROT_READ | mmap.PROT_WRITE,
|
||||
mmap.MAP_SHARED,
|
||||
this.fd,
|
||||
0
|
||||
);
|
||||
open(path: string, forceTruncate: boolean = false): number {
|
||||
this.path = path;
|
||||
|
||||
if (isNew) {
|
||||
const header = IndexProtocol.createHeader(this.maxEntries);
|
||||
header.copy(this.buffer, 0);
|
||||
this.syncHeader();
|
||||
} else {
|
||||
const header = IndexProtocol.readHeader(this.buffer);
|
||||
this.validCount = header.validCount;
|
||||
this.dataFileSize = header.dataFileSize;
|
||||
this.lastSequence = header.lastSequence;
|
||||
}
|
||||
}
|
||||
const isNew = !fs.existsSync(this.path);
|
||||
|
||||
write(
|
||||
index: number,
|
||||
sequence: number,
|
||||
offset: bigint,
|
||||
length: number,
|
||||
timestamp?: bigint
|
||||
): boolean {
|
||||
if (!this.buffer) throw new Error('Index file not opened');
|
||||
if (index < 0 || index >= this.maxEntries) return false;
|
||||
if (isNew || forceTruncate) {
|
||||
// New file: use provided values
|
||||
this.fileSize = IndexProtocol.calcFileSize(this.maxEntries);
|
||||
this.writtenCnt = 0;
|
||||
this.dataFileSize = 0n;
|
||||
this.latestSequence = 0;
|
||||
|
||||
const ts = timestamp ?? BigInt(Date.now()) * 1000000n;
|
||||
this.fd = fs.openSync(this.path, 'w+');
|
||||
fs.ftruncateSync(this.fd, this.fileSize);
|
||||
|
||||
IndexProtocol.writeEntry(this.buffer, index, {
|
||||
sequence,
|
||||
timestamp: ts,
|
||||
offset,
|
||||
length,
|
||||
flags: FLAG_VALID,
|
||||
});
|
||||
// Allocate buffers for header and entry
|
||||
this.headerBuf = Buffer.alloc(INDEX_HEADER_SIZE);
|
||||
this.entryBuf = Buffer.alloc(INDEX_ENTRY_SIZE);
|
||||
|
||||
this.validCount++;
|
||||
if (sequence > this.lastSequence) {
|
||||
this.lastSequence = sequence;
|
||||
const header = IndexProtocol.createHeader(this.maxEntries, this.autoIncrementSequence);
|
||||
header.copy(this.headerBuf, 0);
|
||||
|
||||
// Write header to file
|
||||
fs.writeSync(this.fd, this.headerBuf, 0, INDEX_HEADER_SIZE, 0);
|
||||
fs.fsyncSync(this.fd);
|
||||
} else {
|
||||
// Existing file: read header first
|
||||
this.fd = fs.openSync(this.path, 'r+');
|
||||
|
||||
try {
|
||||
this.headerBuf = Buffer.alloc(INDEX_HEADER_SIZE);
|
||||
this.entryBuf = Buffer.alloc(INDEX_ENTRY_SIZE);
|
||||
|
||||
fs.readSync(this.fd, this.headerBuf, 0, INDEX_HEADER_SIZE, 0);
|
||||
const header = IndexProtocol.readHeader(this.headerBuf);
|
||||
|
||||
if (this.maxEntries !== header.entryCount) {
|
||||
throw new Error(
|
||||
`maxEntries mismatch: provided ${this.maxEntries} but file has ${header.entryCount}`
|
||||
);
|
||||
}
|
||||
if (this.autoIncrementSequence !== header.autoIncrementSequence) {
|
||||
throw new Error(
|
||||
`autoIncrementSequence mismatch: provided ${this.autoIncrementSequence} but file has ${header.autoIncrementSequence}`
|
||||
);
|
||||
}
|
||||
|
||||
const expectFileSize = IndexProtocol.calcFileSize(this.maxEntries);
|
||||
const calcedFileSize = IndexProtocol.calcFileSize(header.entryCount);
|
||||
if (expectFileSize !== calcedFileSize) {
|
||||
// if (opt.version !== header.version) { 버전이 다른거니까 어떻게 처리 할지는 추후 고민 TODO }
|
||||
throw new Error(
|
||||
`Indexfile size calc is invalid : provided ${expectFileSize} but file has ${calcedFileSize}`
|
||||
);
|
||||
}
|
||||
|
||||
this.fileSize = calcedFileSize;
|
||||
this.writtenCnt = header.writtenCnt;
|
||||
this.dataFileSize = header.dataFileSize;
|
||||
this.latestSequence = header.latestSequence;
|
||||
} catch (error) {
|
||||
// Clean up resources on error
|
||||
if (this.fd !== null) {
|
||||
fs.closeSync(this.fd);
|
||||
this.fd = null;
|
||||
}
|
||||
this.headerBuf = null;
|
||||
this.entryBuf = null;
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
return this.writtenCnt;
|
||||
}
|
||||
|
||||
const newDataEnd = offset + BigInt(length);
|
||||
if (newDataEnd > this.dataFileSize) {
|
||||
this.dataFileSize = newDataEnd;
|
||||
write(
|
||||
offset: bigint,
|
||||
length: number,
|
||||
sequence?: number,
|
||||
timestamp?: bigint
|
||||
): boolean {
|
||||
if (!this.entryBuf || this.fd === null) throw new Error('Index file not opened');
|
||||
if (this.writtenCnt >= this.maxEntries) {
|
||||
throw new Error(`Data count exceed provide : ${this.writtenCnt + 1} - max : ${this.maxEntries}`);
|
||||
}
|
||||
|
||||
// Calculate sequence
|
||||
let seq: number;
|
||||
if (!this.autoIncrementSequence) {
|
||||
if (sequence === undefined) {
|
||||
throw new Error('sequence is required when autoIncrementSequence is false');
|
||||
}
|
||||
seq = sequence;
|
||||
} else {
|
||||
seq = this.writtenCnt + 1;
|
||||
}
|
||||
|
||||
const ts = timestamp ?? BigInt(Date.now()) * 1000000n;
|
||||
|
||||
// Create a temporary buffer for this entry
|
||||
const tempBuf = Buffer.alloc(INDEX_HEADER_SIZE + (this.writtenCnt + 1) * INDEX_ENTRY_SIZE);
|
||||
|
||||
// Write entry to temp buffer
|
||||
IndexProtocol.writeEntry(tempBuf, this.writtenCnt, {
|
||||
sequence: seq,
|
||||
timestamp: ts,
|
||||
offset,
|
||||
length,
|
||||
flags: FLAG_VALID,
|
||||
});
|
||||
|
||||
// Calculate file offset for this entry
|
||||
const fileOffset = INDEX_HEADER_SIZE + this.writtenCnt * INDEX_ENTRY_SIZE;
|
||||
|
||||
// Write entry to file
|
||||
fs.writeSync(this.fd, tempBuf, fileOffset, INDEX_ENTRY_SIZE, fileOffset);
|
||||
|
||||
this.writtenCnt++;
|
||||
this.latestSequence = seq;
|
||||
|
||||
const newDataEnd = offset + BigInt(length);
|
||||
if (newDataEnd > this.dataFileSize) {
|
||||
this.dataFileSize = newDataEnd;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
getLatestSequence(): number {
|
||||
return this.latestSequence;
|
||||
}
|
||||
|
||||
append(offset: bigint, length: number, timestamp?: bigint): number {
|
||||
const index = this.validCount;
|
||||
if (index >= this.maxEntries) return -1;
|
||||
syncHeader(): void {
|
||||
if (!this.headerBuf || this.fd === null) return;
|
||||
|
||||
const sequence = this.lastSequence + 1;
|
||||
this.write(index, sequence, offset, length, timestamp);
|
||||
return index;
|
||||
}
|
||||
// Update header counts
|
||||
IndexProtocol.updateHeaderCounts(
|
||||
this.headerBuf,
|
||||
this.writtenCnt,
|
||||
this.dataFileSize,
|
||||
this.latestSequence
|
||||
);
|
||||
|
||||
getLastSequence(): number {
|
||||
return this.lastSequence;
|
||||
}
|
||||
// Write header to file
|
||||
fs.writeSync(this.fd, this.headerBuf, 0, INDEX_HEADER_SIZE, 0);
|
||||
}
|
||||
|
||||
getNextSequence(): number {
|
||||
return this.lastSequence + 1;
|
||||
}
|
||||
syncAll(): void {
|
||||
if (this.fd === null) return;
|
||||
|
||||
syncHeader(): void {
|
||||
if (!this.buffer) return;
|
||||
IndexProtocol.updateHeaderCounts(
|
||||
this.buffer,
|
||||
this.validCount,
|
||||
this.dataFileSize,
|
||||
this.lastSequence
|
||||
);
|
||||
mmap.sync(this.buffer, 0, INDEX_HEADER_SIZE, mmap.MS_ASYNC);
|
||||
}
|
||||
// Sync header first
|
||||
this.syncHeader();
|
||||
|
||||
syncAll(): void {
|
||||
if (!this.buffer) return;
|
||||
this.syncHeader();
|
||||
mmap.sync(this.buffer, 0, this.fileSize, mmap.MS_SYNC);
|
||||
}
|
||||
// Sync all file changes to disk
|
||||
fs.fsyncSync(this.fd);
|
||||
}
|
||||
|
||||
close(): void {
|
||||
if (!this.buffer || this.fd === null) return;
|
||||
close(): void {
|
||||
if (this.fd === null) return;
|
||||
|
||||
this.syncAll();
|
||||
mmap.unmap(this.buffer);
|
||||
fs.closeSync(this.fd);
|
||||
// 1. Sync all changes
|
||||
this.syncAll();
|
||||
|
||||
this.buffer = null;
|
||||
this.fd = null;
|
||||
}
|
||||
// 2. Close file descriptor
|
||||
fs.closeSync(this.fd);
|
||||
this.fd = null;
|
||||
|
||||
getStats() {
|
||||
return {
|
||||
path: this.path,
|
||||
maxEntries: this.maxEntries,
|
||||
validCount: this.validCount,
|
||||
dataFileSize: this.dataFileSize,
|
||||
lastSequence: this.lastSequence,
|
||||
};
|
||||
}
|
||||
}
|
||||
// 3. Clean up buffers
|
||||
this.headerBuf = null;
|
||||
this.entryBuf = null;
|
||||
}
|
||||
|
||||
getStats() {
|
||||
return {
|
||||
path: this.path,
|
||||
writtenCnt: this.writtenCnt,
|
||||
dataFileSize: this.dataFileSize,
|
||||
latestSequence: this.latestSequence,
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user