کاوش در حافظه پنهان با NestJS و Redis

npm install @nestjs/cache-manager cache-manager

import { Module } from '@nestjs/common';  
import { AppController } from './app.controller';  
import { AppService } from './app.service';  
import { MongooseModule } from '@nestjs/mongoose';  
import { ContactModule } from './contact/contact.module';  
import { CacheModule } from '@nestjs/cache-manager';  

@Module({  
  imports: [  
  // mongodb://127.0.0.1:27017/nest-redis - use env variables or other secure options in production
    MongooseModule.forRoot('mongodb://127.0.0.1:27017/nest-redis', {  
      useNewUrlParser: true,  
    }),    ContactModule,  
    CacheModule.register(),  
  ],  controllers: [AppController],  
  providers: [AppService],  
})  
export class AppModule {}

import { Module } from '@nestjs/common';  
import { ContactService } from './contact.service';  
import { ContactController } from './contact.controller';  
import { MongooseModule } from '@nestjs/mongoose';  
import { ContactSchema } from './schemas/schema';  
import { CacheModule } from '@nestjs/cache-manager';  

@Module({  
  imports: [  
    MongooseModule.forFeature([{ name: 'Contact', schema: ContactSchema }]),  
    CacheModule.register(),  
  ],  providers: [ContactService],  
  controllers: [ContactController],  
})  
export class ContactModule {}

@UseInterceptors(CacheInterceptor) // Automatically cache the response for this endpoint  
@Get('contacts/:contactId')  
async getContact(  
  @Res() res,  
  @Param('contactId') contactId,  
) {  
  const contact = await this.contactService.getContact(contactId);  
  if (!contact) throw new NotFoundException('Contact does not exist');  
  return res.status(HttpStatus.OK).json(contact);  
}

@UseInterceptors(CacheInterceptor) // Automatically cache the response for this endpoint  
@CacheKey('getcontact-key')  
@CacheTTL(60000) // now in milliseconds (1 minute === 60000)
@Get('contacts/:contactId')  
async getContact(  
  @Res() res,  
  @Param('contactId') contactId,  
) {  
  const contact = await this.contactService.getContact(contactId);  
  if (!contact) throw new NotFoundException('Contact does not exist');  
  return res.status(HttpStatus.OK).json(contact);  
}

npm i --save cache-manager-redis-yet

import { Module } from '@nestjs/common';  
import { AppController } from './app.controller';  
import { AppService } from './app.service';  
import { MongooseModule } from '@nestjs/mongoose';  
import { ContactModule } from './contact/contact.module';  
import { CacheModule } from '@nestjs/cache-manager';  
import { redisStore } from 'cache-manager-redis-yet';  

@Module({  
  imports: [  
    MongooseModule.forRoot('mongodb://127.0.0.1:27017/nest-redis', {  
      useNewUrlParser: true,  
    }),  
    CacheModule.registerAsync({  
      isGlobal: true,  
      useFactory: async () => ({  
        store: await redisStore({  
          socket: {  
            host: 'localhost',  
            port: 6379,  
          },        
        }),      
      }),    
    }),    
    ContactModule,  
  ],  controllers: [AppController],  
  providers: [AppService],  
})  
export class AppModule {}

@Get('contacts/:contactId')  
async getContact(@Res() res, @Param('contactId') contactId) {  
  const cachedData = await this.cacheService.get(contactId.toString());  
  if (cachedData) {  
    console.log('Getting data from cache');  
    return res.status(HttpStatus.OK).json(cachedData);  
  }  
  const contact = await this.contactService.getContact(contactId);  
  if (!contact) throw new NotFoundException('Contact does not exist');  
  await this.cacheService.set(contactId.toString(), contact);  
  const newCachedData = await this.cacheService.get(contactId.toString());
  console.log('data set to cache', newCachedData);  
  return res.status(HttpStatus.OK).json(contact);  
}

const cachedData = await this.cacheService.get(contactId.toString());  
  if (cachedData) {  
    console.log('Getting data from cache');  
    return res.status(HttpStatus.OK).json(cachedData);  
  }  

await this.cacheService.set(contactId.toString(), contact);  
  const newCachedData = await this.cacheService.get(contactId.toString());
  console.log('data set to cache', newCachedData);  

[Nest] 3720  - 05/09/2023, 10:00:49 AM     LOG [NestApplication] Nest application successfully started +5ms
data set to cache {
  _id: '6459510cfc398baa01998a66',
  first_name: 'Daniel',
  last_name: 'Olabemiwo',
  email: 'dee@gmail.com',
  phone: '+23832101',
  message: 'Welcome to this side',
  __v: 0
}