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@raytonx/nest-cache

v0.1.0

Published

Cache module and helpers for NestJS applications.

Readme

@raytonx/nest-cache

基于 Nest 官方 @nestjs/cache-manager 的缓存模块与工具服务。

English version: README.en.md

安装

pnpm add @raytonx/nest-cache
npm i @raytonx/nest-cache
yarn add @raytonx/nest-cache

快速开始

注册内存缓存:

import { Module } from "@nestjs/common";
import { CacheModule } from "@raytonx/nest-cache";

@Module({
  imports: [
    CacheModule.forRoot({
      isGlobal: true,
      ttl: 5_000,
    }),
  ],
})
export class AppModule {}

在服务中使用 CacheService

import { Injectable } from "@nestjs/common";
import { CacheService } from "@raytonx/nest-cache";

@Injectable()
export class UsersService {
  constructor(private readonly cache: CacheService) {}

  findProfile(userId: string) {
    return this.cache.wrap(`users:${userId}`, () => this.loadProfile(userId), 5_000);
  }

  private async loadProfile(userId: string) {
    return { id: userId };
  }
}

Redis

Redis 使用 @keyv/redis,连接由官方 cache-manager/Keyv store 维护。

CacheModule.forRoot({
  isGlobal: true,
  store: {
    type: "redis",
    url: "redis://localhost:6379",
  },
  ttl: 5_000,
});

forRootAsync

CacheModule.forRootAsync({
  useFactory: () => ({
    store: {
      type: "redis",
      url: process.env.REDIS_URL ?? "redis://localhost:6379",
    },
    ttl: 5_000,
  }),
});

CacheService

  • get<T>(key):读取缓存,未命中时返回 undefined
  • set<T>(key, value, ttl?):写入缓存,ttl 单位为毫秒。
  • del(key):删除缓存。
  • clear():清空当前 cache-manager store。
  • has(key):判断缓存是否存在。
  • wrap<T>(key, factory, ttl?):命中时返回缓存,未命中时执行 factory 并写入缓存。

官方缓存能力

本包重新导出 Nest 官方缓存能力,可以直接从 @raytonx/nest-cache 引入:

import { CacheInterceptor, CacheKey, CacheTTL } from "@raytonx/nest-cache";

导出内容

  • CacheModule
  • CacheService
  • CACHE_MODULE_OPTIONS
  • CacheModuleOptions
  • CacheModuleAsyncOptions
  • NestCacheModule
  • CACHE_MANAGER
  • CacheInterceptor
  • CacheKey
  • CacheTTL
  • Cache