Nestjs 服务级缓存 [英] Nestjs Service level caching

问题描述

查看 Netsjs 文档，我可以看到一般方法是使用 CacheInterceptor 的控制器级缓存，

Looking at Netsjs documentation I can see that the general approach is controller level caching utilizing CacheInterceptor,

我希望实现的是服务/数据库级缓存 - 用例主要用于其他服务所需的静态数据库数据，有没有办法扩展提供的缓存模块以在服务内使用?

What I am looking to achieve is Service/DB level caching - use case is mainly for Static DB data that is required by other services, Is there a way to extend the supplied Cache Module to be used from within services ?

推荐答案

我也在寻找一种方法来做到这一点.

I was also looking for a way to do this.

现在，我通过在服务中注入 cacheManager 实例并直接使用它，根据一些研究使其工作.

For now I made it work based on some research by injecting the cacheManager instance in the service, and using it directly.

import { CACHE_MANAGER, Inject, Injectable } from '@nestjs/common';

@Injectable()
export class MyService {
  constructor(
    @Inject(CACHE_MANAGER) protected readonly cacheManager
  ) {}

  public async myMethod() {
    const cachedData = await this.cacheManager.get(cacheKey);
    if (cachedData) return cachedData;

    const data = ''; // Do normal stuff here

    this.cacheManager.set(cacheKey, data);

    return data;
  }
}

但我仍在寻找一种方法来创建一个包含缓存逻辑的缓存装饰器，并将使用函数参数作为缓存键

But I'm still looking for a way to create a caching decorator that would contain the cache logic, and would use the function arguments as cache key

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