Created
May 8, 2024 17:23
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| import Redis from 'ioredis'; | |
| import { inject, injectable } from 'tsyringe'; | |
| import { Logger } from '@aws-lambda-powertools/logger'; | |
| import env from '@/configs/be-config'; | |
| @injectable() | |
| export class CacheService { | |
| private redis: Redis | undefined; | |
| constructor( | |
| @inject(Logger) | |
| private readonly logger: Logger, | |
| ) { | |
| try { | |
| this.redis = new Redis({ | |
| host: process.env.REDIS_HOST, | |
| port: process.env.REDIS_PORT, | |
| password: process.env.REDIS_PASS, | |
| db: process.env.REDIS_DB, | |
| // connectTimeout: 100, | |
| maxRetriesPerRequest: 1, | |
| maxLoadingRetryTime: 100, | |
| retryStrategy: (times) => Math.min(times * 10, 100), | |
| }); | |
| this.redis.on('error', (error) => logger.error('redis error', { error })); | |
| this.redis.on('connect', () => logger.info('redis connected')); | |
| } catch (error) { | |
| this.logger.error('Error on connect to Redis', { error }); | |
| this.redis = undefined; | |
| } | |
| } | |
| private async reconnect() { | |
| if (this.redis?.status === 'end') await this.redis.connect(); | |
| } | |
| get isReady(): boolean { | |
| return !!this.redis && this.redis.status === 'ready'; | |
| } | |
| async set(key: string, value: any, expiration: number = 3600): Promise<string | number> { | |
| if (!this.isReady) { | |
| return ''; | |
| } | |
| try { | |
| await this.reconnect(); | |
| if (expiration === 0) return await this.redis!.setnx(key, JSON.stringify(value)); | |
| return await this.redis!.set(key, JSON.stringify(value), 'EX', expiration); | |
| } catch (error) { | |
| this.logger.error('Error on set cache', { error }); | |
| return ''; | |
| } | |
| } | |
| async get<T>(key: string): Promise<T | null> { | |
| if (!this.isReady) { | |
| return null; | |
| } | |
| try { | |
| await this.reconnect(); | |
| const value = await this.redis!.get(key); | |
| return value ? JSON.parse(value) : null; | |
| } catch (error) { | |
| this.logger.error('Error on get cache', { error }); | |
| return null; | |
| } | |
| } | |
| async delete(key: string): Promise<number> { | |
| if (!this.isReady) { | |
| return 0; | |
| } | |
| try { | |
| await this.reconnect(); | |
| return await this.redis!.del(key); | |
| } catch (error) { | |
| this.logger.error('Error on delete cache', { error }); | |
| return 0; | |
| } | |
| } | |
| async close(): Promise<void> { | |
| if (!this.isReady) { | |
| return; | |
| } | |
| await this.redis!.quit(); | |
| } | |
| } |
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