nestjs cache-manager redis

NestJS Cache Manager is a module for caching data in NestJS applications. It provides a simple interface for caching data using various caching strategies such as memory, Redis, and others. Redis is one of the caching strategies that NestJS Cache Manager supports.

Redis is an in-memory data structure store that can be used as a database, cache, and message broker. It is often used as a cache because of its high performance and scalability. Redis stores data in memory, which makes it faster than traditional disk-based databases.

Using Redis as a caching strategy in NestJS Cache Manager is easy. First, you need to install the Redis module:

npm install cache-manager-redis-store

Next, you need to configure the Redis cache in your NestJS application:

import { CacheModule, Module } from '@nestjs/common';
import * as redisStore from 'cache-manager-redis-store';

@Module({
  imports: [
    CacheModule.register({
      store: redisStore,
      host: 'localhost',
      port: 6379,
    }),
  ],
})
export class AppModule {}

In this example, we import the CacheModule and configure it to use the Redis store. We set the host and port to connect to the Redis instance.

Now, you can use the cache in your NestJS application:

import { CacheInterceptor, CacheTTL, Controller, Get, UseInterceptors } from '@nestjs/common';

@Controller('cats')
export class CatsController {
  @Get()
  @UseInterceptors(CacheInterceptor)
  @CacheTTL(60)
  findAll(): string[] {
    return ['Cat 1', 'Cat 2', 'Cat 3'];
  }
}

In this example, we use the CacheInterceptor to cache the response of the findAll() method for 60 seconds. This means that subsequent requests for the same resource will be served from the cache, which improves performance and reduces the load on the server.

Overall, using Redis as a caching strategy in NestJS Cache Manager is a great way to improve the performance and scalability of your NestJS application.