Interface modified mmap to fd
This commit is contained in:
Eli-Class
@@ -1,213 +1,215 @@
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// src/data-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 { DATA_HEADER_SIZE } from './constants.js';
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import { DataProtocol, DataHeader } from './protocol.js';
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import { IndexReader } from '../idx/index.js';
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import type { Serializer, DataEntry } from './types.js';
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export class DataReader<T> {
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private fd: number | null = null;
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private buffer: Buffer | null = null;
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private header: DataHeader | null = null;
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private fd: number | null = null;
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private header: DataHeader | null = null;
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private indexReader: IndexReader;
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private serializer: Serializer<T>;
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private indexReader: IndexReader;
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private serializer: Serializer<T>;
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readonly dataPath: string;
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readonly indexPath: string;
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readonly dataPath: string;
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readonly indexPath: string;
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constructor(basePath: string, serializer: Serializer<T>) {
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this.dataPath = `${basePath}.dat`;
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this.indexPath = `${basePath}.idx`;
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this.serializer = serializer;
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this.indexReader = new IndexReader(this.indexPath);
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}
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constructor(basePath: string, serializer: Serializer<T>) {
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this.dataPath = `${basePath}.dat`;
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this.indexPath = `${basePath}.idx`;
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this.serializer = serializer;
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this.indexReader = new IndexReader(this.indexPath);
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}
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open(): void {
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const stats = fs.statSync(this.dataPath);
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this.fd = fs.openSync(this.dataPath, 'r');
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open(): void {
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this.fd = fs.openSync(this.dataPath, '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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// Read header only
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const headerBuf = Buffer.alloc(DATA_HEADER_SIZE);
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fs.readSync(this.fd, headerBuf, 0, DATA_HEADER_SIZE, 0);
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this.header = DataProtocol.readHeader(headerBuf);
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this.header = DataProtocol.readHeader(this.buffer);
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this.indexReader.open();
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}
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this.indexReader.open();
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}
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getHeader(): DataHeader {
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if (!this.header) throw new Error('Data file not opened');
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return this.header;
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}
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private readRecord(offset: bigint, length: number): Buffer {
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if (this.fd === null) throw new Error('Data file not opened');
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getBySequence(sequence: number): DataEntry<T> | null {
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if (!this.buffer) throw new Error('Data file not opened');
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const buf = Buffer.alloc(length);
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fs.readSync(this.fd, buf, 0, length, Number(offset));
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return buf;
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}
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const found = this.indexReader.binarySearchBySequence(sequence);
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if (!found) return null;
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getHeader(): DataHeader {
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if (!this.header) throw new Error('Data file not opened');
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return this.header;
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}
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const result = DataProtocol.deserializeRecord(
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this.buffer,
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Number(found.entry.offset),
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this.serializer
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);
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if (!result) return null;
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getBySequence(sequence: number): DataEntry<T> | null {
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if (this.fd === null) throw new Error('Data file not opened');
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return {
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sequence: found.entry.sequence,
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timestamp: found.entry.timestamp,
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data: result.data,
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};
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}
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const found = this.indexReader.binarySearchBySequence(sequence);
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if (!found) return null;
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getByIndex(index: number): DataEntry<T> | null {
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if (!this.buffer) throw new Error('Data file not opened');
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const entry = this.indexReader.getEntry(index);
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if (!entry) return null;
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const result = DataProtocol.deserializeRecord(
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this.buffer,
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Number(entry.offset),
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this.serializer
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);
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if (!result) return null;
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return {
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sequence: entry.sequence,
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timestamp: entry.timestamp,
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data: result.data,
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};
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}
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getBulkData(startSeq: number, endSeq: number): DataEntry<T>[] {
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if (!this.buffer) throw new Error('Data file not opened');
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const results: DataEntry<T>[] = [];
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const indexHeader = this.indexReader.getHeader();
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let startIdx = this.findStartIndex(startSeq, indexHeader.validCount);
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for (let i = startIdx; i < indexHeader.validCount; i++) {
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const entry = this.indexReader.getEntry(i);
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if (!entry) continue;
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if (entry.sequence > endSeq) break;
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if (entry.sequence >= startSeq) {
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const buf = this.readRecord(found.entry.offset, found.entry.length);
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const result = DataProtocol.deserializeRecord(
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this.buffer,
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Number(entry.offset),
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this.serializer
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buf,
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0,
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this.serializer
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);
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if (result) {
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results.push({
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if (!result) return null;
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return {
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sequence: found.entry.sequence,
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timestamp: found.entry.timestamp,
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data: result.data,
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};
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}
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getByIndex(index: number): DataEntry<T> | null {
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if (this.fd === null) throw new Error('Data file not opened');
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const entry = this.indexReader.getEntry(index);
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if (!entry) return null;
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const buf = this.readRecord(entry.offset, entry.length);
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const result = DataProtocol.deserializeRecord(
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buf,
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0,
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this.serializer
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);
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if (!result) return null;
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return {
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sequence: entry.sequence,
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timestamp: entry.timestamp,
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data: result.data,
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});
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};
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}
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getBulkData(startSeq: number, endSeq: number): DataEntry<T>[] {
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if (this.fd === null) throw new Error('Data file not opened');
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const results: DataEntry<T>[] = [];
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const indexHeader = this.indexReader.getHeader();
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let startIdx = this.findStartIndex(startSeq, indexHeader.writtenCnt);
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for (let i = startIdx; i < indexHeader.writtenCnt; i++) {
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const entry = this.indexReader.getEntry(i);
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if (!entry) continue;
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if (entry.sequence > endSeq) break;
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if (entry.sequence >= startSeq) {
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const buf = this.readRecord(entry.offset, entry.length);
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const result = DataProtocol.deserializeRecord(
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buf,
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0,
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this.serializer
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);
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if (result) {
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results.push({
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sequence: entry.sequence,
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timestamp: entry.timestamp,
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data: result.data,
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});
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}
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}
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}
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}
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return results;
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}
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return results;
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}
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private findStartIndex(targetSeq: number, writtenCnt: number): number {
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let left = 0;
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let right = writtenCnt - 1;
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let result = 0;
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private findStartIndex(targetSeq: number, validCount: number): number {
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let left = 0;
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let right = validCount - 1;
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let result = 0;
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while (left <= right) {
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const mid = Math.floor((left + right) / 2);
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const entry = this.indexReader.getEntry(mid);
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while (left <= right) {
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const mid = Math.floor((left + right) / 2);
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const entry = this.indexReader.getEntry(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) {
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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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result = mid;
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right = mid - 1;
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} else {
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left = mid + 1;
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}
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}
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if (entry.sequence >= targetSeq) {
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result = mid;
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right = mid - 1;
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} else {
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left = mid + 1;
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}
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return result;
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}
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return result;
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}
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getBulkDataByTime(startTs: bigint, endTs: bigint): DataEntry<T>[] {
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if (this.fd === null) throw new Error('Data file not opened');
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getBulkDataByTime(startTs: bigint, endTs: bigint): DataEntry<T>[] {
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if (!this.buffer) throw new Error('Data file not opened');
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const indexResults = this.indexReader.findByTimeRange(startTs, endTs);
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const results: DataEntry<T>[] = [];
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const indexResults = this.indexReader.findByTimeRange(startTs, endTs);
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const results: DataEntry<T>[] = [];
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for (const { entry } of indexResults) {
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const buf = this.readRecord(entry.offset, entry.length);
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const result = DataProtocol.deserializeRecord(
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buf,
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0,
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this.serializer
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);
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if (result) {
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results.push({
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sequence: entry.sequence,
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timestamp: entry.timestamp,
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data: result.data,
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});
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}
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}
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for (const { entry } of indexResults) {
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const result = DataProtocol.deserializeRecord(
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this.buffer,
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Number(entry.offset),
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this.serializer
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);
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if (result) {
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results.push({
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sequence: entry.sequence,
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timestamp: entry.timestamp,
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data: result.data,
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});
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}
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return results;
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}
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return results;
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}
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getAllData(): DataEntry<T>[] {
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if (this.fd === null) throw new Error('Data file not opened');
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getAllData(): DataEntry<T>[] {
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if (!this.buffer) throw new Error('Data file not opened');
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const entries = this.indexReader.getAllEntries();
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const results: DataEntry<T>[] = [];
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const entries = this.indexReader.getAllEntries();
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const results: DataEntry<T>[] = [];
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for (const entry of entries) {
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const buf = this.readRecord(entry.offset, entry.length);
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const result = DataProtocol.deserializeRecord(
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buf,
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0,
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this.serializer
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);
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if (result) {
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results.push({
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sequence: entry.sequence,
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timestamp: entry.timestamp,
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data: result.data,
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});
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}
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}
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for (const entry of entries) {
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const result = DataProtocol.deserializeRecord(
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this.buffer,
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Number(entry.offset),
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this.serializer
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);
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if (result) {
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results.push({
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sequence: entry.sequence,
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timestamp: entry.timestamp,
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data: result.data,
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});
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}
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return results;
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}
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return results;
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}
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getRecordCount(): number {
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return this.indexReader.getHeader().validCount;
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}
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getLastSequence(): number {
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return this.indexReader.getHeader().lastSequence;
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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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getRecordCount(): number {
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return this.indexReader.getHeader().writtenCnt;
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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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getLastSequence(): number {
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return this.indexReader.getHeader().latestSequence;
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}
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this.header = null;
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this.indexReader.close();
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}
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}
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close(): void {
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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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}
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this.header = null;
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this.indexReader.close();
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}
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}
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@@ -1,16 +1,19 @@
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import { IndexFileOptions } from "../idx/types.js";
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// src/data-file/types.ts
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export interface Serializer<T> {
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serialize(data: T): Buffer;
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deserialize(buf: Buffer): T;
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serialize(data: T): Buffer;
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deserialize(buf: Buffer): T;
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}
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export interface DataEntry<T> {
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sequence: number;
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timestamp: bigint;
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data: T;
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sequence: number;
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timestamp: bigint;
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data: T;
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}
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export interface DataFileOptions<T> {
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serializer: Serializer<T>;
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maxEntries?: number;
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}
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serializer: Serializer<T>;
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forceTruncate?: boolean;
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indexFileOpt: IndexFileOptions;
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}
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@@ -2,119 +2,189 @@
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import * as fs from 'node:fs';
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import { DATA_HEADER_SIZE } from './constants.js';
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import { DataProtocol } from './protocol.js';
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import { IndexWriter } from '../idx/index.js';
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import { IndexWriter, IndexFileOptionsRequired } from '../idx/index.js';
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import type { Serializer, DataFileOptions } from './types.js';
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export class DataWriter<T> {
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private fd: number | null = null;
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private headerBuf: Buffer | null = null;
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private currentOffset: bigint = BigInt(DATA_HEADER_SIZE);
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private recordCount = 0;
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private fd: number | null = null;
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private headerBuf: Buffer | null = null;
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private currentOffset: bigint = BigInt(DATA_HEADER_SIZE);
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private recordCount = 0;
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private indexWriter: IndexWriter;
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private serializer: Serializer<T>;
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private indexWriter: IndexWriter;
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readonly dataPath: string;
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readonly indexPath: string;
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// See DataFileOptions
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private readonly serializer: Serializer<T>;
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private readonly forceTruncate: boolean;
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constructor(basePath: string, options: DataFileOptions<T>) {
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this.dataPath = `${basePath}.dat`;
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this.indexPath = `${basePath}.idx`;
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this.serializer = options.serializer;
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private latestSequence: number = 0;
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const maxEntries = options.maxEntries ?? 10_000_000;
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this.indexWriter = new IndexWriter(this.indexPath, { maxEntries });
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}
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private readonly indexFileOpt: IndexFileOptionsRequired;
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open(): void {
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const isNew = !fs.existsSync(this.dataPath);
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private dataPath: string | null = null;
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private indexPath: string | null = null;
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this.fd = fs.openSync(this.dataPath, isNew ? 'w+' : 'r+');
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this.headerBuf = Buffer.alloc(DATA_HEADER_SIZE);
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if (isNew) {
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const header = DataProtocol.createHeader();
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fs.writeSync(this.fd, header, 0, DATA_HEADER_SIZE, 0);
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this.currentOffset = BigInt(DATA_HEADER_SIZE);
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this.recordCount = 0;
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} else {
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fs.readSync(this.fd, this.headerBuf, 0, DATA_HEADER_SIZE, 0);
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const header = DataProtocol.readHeader(this.headerBuf);
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this.currentOffset = header.fileSize;
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this.recordCount = header.recordCount;
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constructor(options: DataFileOptions<T>) {
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this.serializer = options.serializer;
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this.forceTruncate = options.forceTruncate ?? false;
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this.indexFileOpt = {
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maxEntries: options.indexFileOpt.maxEntries ?? 10_000_000,
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autoIncrementSequence: options.indexFileOpt.autoIncrementSequence ?? false
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}
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this.indexWriter = new IndexWriter(this.indexFileOpt);
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}
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this.indexWriter.open();
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}
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open(basePath: string): void {
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this.dataPath = `${basePath}.dat`;
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this.indexPath = `${basePath}.idx`;
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append(data: T, timestamp?: bigint): number {
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if (this.fd === null) throw new Error('Data file not opened');
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// Index file 을 Open 함으로써 파일을 시작 할 수 있는지 검증 (Throw 로써)
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// Open index file with maxEntries and autoIncrementSequence
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const writtenCount = this.indexWriter.open(this.indexPath, this.forceTruncate);
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const isNew = !fs.existsSync(this.dataPath);
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const buf = DataProtocol.serializeRecord(data, this.serializer);
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const offset = this.currentOffset;
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// Index file 은 초기화인데, 신규파일 혹은 강제 클리어가 아니라면
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if (writtenCount === 0 && !(isNew || this.forceTruncate)) {
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throw new Error(`Index file & Data File is invalid ${this.indexPath} is initial but ${this.dataPath} is exists`);
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}
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if (writtenCount > 0 && isNew) {
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throw new Error(`Index file & Data File is invalid data of ${this.indexPath} | ${writtenCount} is exists but ${this.dataPath} is not exists`);
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}
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fs.writeSync(this.fd, buf, 0, buf.length, Number(offset));
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// Warn if forceTruncate will delete existing data
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if (this.forceTruncate && !isNew) {
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const stats = fs.statSync(this.dataPath);
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const sizeMB = (stats.size / 1024 / 1024).toFixed(2);
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console.warn(
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`[DataWriter] forceTruncate enabled: Deleting ${sizeMB} MB of existing data\n` +
|
||||
` Index: ${this.indexPath} (${writtenCount} records)\n` +
|
||||
` Data: ${this.dataPath}`
|
||||
);
|
||||
}
|
||||
|
||||
const sequence = this.indexWriter.getNextSequence();
|
||||
const ts = timestamp ?? BigInt(Date.now()) * 1000000n;
|
||||
this.fd = fs.openSync(this.dataPath,
|
||||
isNew || this.forceTruncate ? 'w+' : 'r+');
|
||||
|
||||
this.indexWriter.append(offset, buf.length, ts);
|
||||
try {
|
||||
this.headerBuf = Buffer.alloc(DATA_HEADER_SIZE);
|
||||
|
||||
this.currentOffset += BigInt(buf.length);
|
||||
this.recordCount++;
|
||||
if (isNew || this.forceTruncate) {
|
||||
const header = DataProtocol.createHeader();
|
||||
fs.writeSync(this.fd, header, 0, DATA_HEADER_SIZE, 0);
|
||||
this.currentOffset = BigInt(DATA_HEADER_SIZE);
|
||||
this.recordCount = 0;
|
||||
this.latestSequence = 0;
|
||||
} else {
|
||||
fs.readSync(this.fd, this.headerBuf, 0, DATA_HEADER_SIZE, 0);
|
||||
const header = DataProtocol.readHeader(this.headerBuf);
|
||||
|
||||
return sequence;
|
||||
}
|
||||
// Validate: Data file recordCount must match Index file writtenCnt
|
||||
if (header.recordCount !== writtenCount) {
|
||||
throw new Error(
|
||||
`Data file record count mismatch: Data has ${header.recordCount} but Index has ${writtenCount}`
|
||||
);
|
||||
}
|
||||
|
||||
appendBulk(records: T[], timestamp?: bigint): number[] {
|
||||
const sequences: number[] = [];
|
||||
const ts = timestamp ?? BigInt(Date.now()) * 1000000n;
|
||||
|
||||
for (const record of records) {
|
||||
const seq = this.append(record, ts);
|
||||
sequences.push(seq);
|
||||
this.currentOffset = header.fileSize;
|
||||
this.recordCount = header.recordCount;
|
||||
this.latestSequence = this.indexWriter.getLatestSequence();
|
||||
}
|
||||
} catch (error) {
|
||||
// Clean up resources on error
|
||||
if (this.fd !== null) {
|
||||
fs.closeSync(this.fd);
|
||||
this.fd = null;
|
||||
}
|
||||
this.headerBuf = null;
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
return sequences;
|
||||
}
|
||||
append(data: T, sequence?: number, timestamp?: bigint): number {
|
||||
if (this.fd === null) throw new Error('Data file not opened');
|
||||
|
||||
getLastSequence(): number {
|
||||
return this.indexWriter.getLastSequence();
|
||||
}
|
||||
const buf = DataProtocol.serializeRecord(data, this.serializer);
|
||||
const offset = this.currentOffset;
|
||||
|
||||
getNextSequence(): number {
|
||||
return this.indexWriter.getNextSequence();
|
||||
}
|
||||
fs.writeSync(this.fd, buf, 0, buf.length, Number(offset));
|
||||
|
||||
sync(): void {
|
||||
if (this.fd === null || !this.headerBuf) return;
|
||||
// Write to index file
|
||||
this.indexWriter.write(offset, buf.length, sequence, timestamp);
|
||||
|
||||
DataProtocol.updateHeader(this.headerBuf, this.currentOffset, this.recordCount);
|
||||
fs.writeSync(this.fd, this.headerBuf, 0, DATA_HEADER_SIZE, 0);
|
||||
fs.fsyncSync(this.fd);
|
||||
// Update latestSequence to the most recent sequence
|
||||
this.latestSequence = this.indexWriter.getLatestSequence();
|
||||
|
||||
this.indexWriter.syncAll();
|
||||
}
|
||||
this.currentOffset += BigInt(buf.length);
|
||||
++this.recordCount;
|
||||
|
||||
close(): void {
|
||||
this.sync();
|
||||
|
||||
if (this.fd !== null) {
|
||||
fs.closeSync(this.fd);
|
||||
this.fd = null;
|
||||
return this.latestSequence;
|
||||
}
|
||||
|
||||
this.indexWriter.close();
|
||||
this.headerBuf = null;
|
||||
}
|
||||
/*
|
||||
appendBulk(records: T[], sequences?: number[], timestamp?: bigint): number[] {
|
||||
// Runtime check: sequences required when autoIncrementSequence is false
|
||||
if (!this.autoIncrementSequence) {
|
||||
if (!sequences) {
|
||||
throw new Error('sequences is required when autoIncrementSequence is false');
|
||||
}
|
||||
if (sequences.length !== records.length) {
|
||||
throw new Error(`sequences length (${sequences.length}) must match records length (${records.length})`);
|
||||
}
|
||||
}
|
||||
|
||||
getStats() {
|
||||
return {
|
||||
dataPath: this.dataPath,
|
||||
indexPath: this.indexPath,
|
||||
currentOffset: this.currentOffset,
|
||||
recordCount: this.recordCount,
|
||||
lastSequence: this.indexWriter.getLastSequence(),
|
||||
};
|
||||
}
|
||||
}
|
||||
const resultSequences: number[] = [];
|
||||
const ts = timestamp ?? BigInt(Date.now()) * 1000000n;
|
||||
|
||||
for (let i = 0; i < records.length; i++) {
|
||||
const seq = sequences?.[i];
|
||||
const resultSeq = this.append(records[i], seq, ts);
|
||||
resultSequences.push(resultSeq);
|
||||
}
|
||||
|
||||
return resultSequences;
|
||||
}
|
||||
*/
|
||||
|
||||
getLatestSequence(): number {
|
||||
return this.latestSequence;
|
||||
}
|
||||
|
||||
getNextSequence(): number {
|
||||
return this.latestSequence + 1;
|
||||
}
|
||||
|
||||
sync(): void {
|
||||
if (this.fd === null || !this.headerBuf) return;
|
||||
|
||||
DataProtocol.updateHeader(this.headerBuf, this.currentOffset, this.recordCount);
|
||||
fs.writeSync(this.fd, this.headerBuf, 0, DATA_HEADER_SIZE, 0);
|
||||
fs.fsyncSync(this.fd);
|
||||
|
||||
this.indexWriter.syncAll();
|
||||
}
|
||||
|
||||
close(): void {
|
||||
this.sync();
|
||||
|
||||
if (this.fd !== null) {
|
||||
fs.closeSync(this.fd);
|
||||
this.fd = null;
|
||||
}
|
||||
|
||||
this.indexWriter.close();
|
||||
this.headerBuf = null;
|
||||
}
|
||||
|
||||
getStats() {
|
||||
return {
|
||||
dataPath: this.dataPath,
|
||||
indexPath: this.indexPath,
|
||||
currentOffset: this.currentOffset,
|
||||
recordCount: this.recordCount,
|
||||
latestSequence: this.indexWriter.getLatestSequence(),
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user