📝MongoDB

This service is responsible for connecting to the MongoDB database.

Imports

Service

import { MongoDBService } from 'niro-health';

Module

Interface

Environment Variables

Do you create variables an .env file.

name	description
MONGODB_USERNAME	Username of the mongodb.
MONGODB_PASSWORD	Password of the mongodb.
MONGODB_HOST	Host of the mongodb.
MONGODB_PORT	Port of the mongodb.
MONGODB_NAME	Database name of the mongodb.
MONGODB_GRIDFS_NAME	Database gridfs name of the mongodb.
MONGODB_CONNECTION_SSL	SSL connection of the mongodb.
MONGODB_PROJECT_NAME	Project name of the mongodb.

Check the example file.

.env

MONGODB_USERNAME=mongodb
MONGODB_PASSWORD=mongodb
MONGODB_HOST=localhost
MONGODB_PORT=27017
MONGODB_NAME=project_development
MONGODB_GRIDFS_NAME=project_development_gridfs
MONGODB_CONNECTION_SSL=false
MONGODB_PROJECT_NAME=niro_health

Method of Use

To use this module, you need to inject it into the desired service.

import { Module } from '@nestjs/common';
import {
  AppHostService,
  MongoDBService,
  ConfigurationService,
  ValidatorRegexpService,
  StringExService,
  DebugService,
} from 'niro-health';
import { AppController } from './app.controller';
import { AppService } from './app.service';

@Module({
  controllers: [AppController],
  providers: [
    AppService,
    {
      provide: 'IAppHostService',
      useClass: AppHostService,
    },
    {
      provide: 'IMongoDBService',
      useClass: MongoDBService,
    },
    {
      provide: 'IConfigurationService',
      useClass: ConfigurationService,
    },
    {
      provide: 'IValidatorRegexpService',
      useClass: ValidatorRegexpService,
    },
    {
      provide: 'IStringExService',
      useClass: StringExService,
    },
    {
      provide: 'IDebugService',
      useClass: DebugService,
    },
  ],
})
export class AppModule {}

Injecting the module into our service.

import { Inject, Injectable } from '@nestjs/common';
import type { IAppHostService, IMongoDBService } from 'niro-health';

@Injectable()
export class AppService {
  constructor(
    @Inject('IAppHostService')
    private readonly appHostService: IAppHostService,
    @Inject('IMongoDBService')
    private readonly mongoDBService: IMongoDBService,
  ) {}

  async enableShutdownHooks() {
    await this.mongoDBService.enableShutdownHooks(this.appHostService.app);
  }
}

Modifying our main.ts

main.ts

import { NestFactory } from '@nestjs/core';
import { AppModule } from '@/app.module';
import { Logger } from '@nestjs/common';
import { AppHostModule, AppHostService } from 'niro-health';
import { AppModule } from './app.module';
import { AppService } from './app.service';

(async function bootstrap() {
  const app = await NestFactory.create(AppModule, {
    logger: new Logger('NestApplication', {
      timestamp: true,
    }),
    cors: true,
  });
  app.select(AppHostModule).get(AppHostService).setApp(app);
  app.select(AppModule).get(AppService).enableShutdownHooks();
})();

With dependencies

You will need to inject the following interfaces.

Interface	Service
IAppHostService	Link to Service documentation
IConfigurationService	Link to Service documentation
IValidatorRegexpService	Link to Service documentation
IStringExService	Link to Service documentation
IDebugService	Link to Service documentation

Properties

Property	Scope	Description
app	public	The application instance.
_mongoConfig	private	The MongoDB configuration.

Methods

Method	Scope	Description
onModuleInit	public	Initialize the module.
_initialize	private	Initialize the MongoDB connection.
_uri	private	Create the MongoDB connection URI.
_connectionLogs	private	MongoDB connection logs.
_connectionClose	private	MongoDB connection close.
_connectionOpen	private	MongoDB connection open.
getDB	public	Create a new Db instance sharing the current socket connections.
shutdown	public	Close the current connection.
onApplicationShutdown	public	Application shutdown hook.
enableShutdownHooks	public	Enable shutdown hooks.