nest-job-scheduler

nest-scheduler

This library can be used to create scheduled jobs which run on a NestJS API. The underlying job scheduler used in this project is node-cron.

Setup:

Setting up this library requires you to perform the following steps:

1. Install node-cron in your project using npm i node-cron --save
2. Import the module in your project.

  import { Module } from '@nestjs/common';
  import { JobSchedulerModule } from 'nest-job-scheduler';
  import { AppSchedulersService } from './app-schedulers.service';

  import { AppController } from './app.controller';
  import { AppService } from './app.service';

  @Module({
    imports: [JobSchedulerModule], // <----- Import the module here
    controllers: [AppController],
    providers: [AppService, AppSchedulersService],
  })
  export class AppModule { }

3. Import the scheduler service in one of your global service from where you will schedule jobs

  import { Injectable } from "@nestjs/common";
  import { JobSchedulerService } from "nest-job-scheduler";
  import { AppService } from "./app.service";

  @Injectable()
  export class AppSchedulersService {
    constructor(private scheduler: JobSchedulerService, // <----- Use DI to import the scheduler
      private readonly appService: AppService) {
      this.scheduler.enqueue({ // <----- Enqueue all the required jobs in the constructor
        name: 'Greeting', // <----- Name must be unique across all jobs to uniquely identify the job
        cron: '*/5 * * * * *', // <----- Schedule of the job
        enabled: true, // <------ Weather the job should be enabled by default
      },
        this.appService.getData.bind(this), // <----- Specify the function to be executed 
        true // <----- Should run once immidiately?
      );
    }
  }

Access the scheduled jobs via API

When you start the target application which imports this package, a controller endpoint will get added to the application.

All the available endpoints in this controller can be found in this Postman collection