How to set cron job in nestjs

import { Injectable } from "@nestjs/common";
import { CronJob } from "cron";
import { SchedulerRegistry } from "@nestjs/schedule";

@Injectable()
export class CronService {
  constructor(private schedulerRegistry: SchedulerRegistry) {}

  public async scheduleSendNotification(
    hour: string,
    minutes: String,
    jobName: string,
    day: string,
    month: string
  ) {
    const job = new CronJob(
      `0 ${minutes} ${hour} ${day} ${month} *`,
      async () => {
        console.log("Cron job executed successfully. ");
      }
    );

    this.schedulerRegistry.addCronJob(jobName, job);
    job.start();

    console.log(` Cron will execute at ${hours}:${minutes}. `);
  }
}

In this, we use the CronJob object from the cron package to create the cron job. The CronJob constructor takes a cron pattern (just like the

@Cron()

decorator) as its first argument, and a callback to be executed when the cron timer fires as its second argument. The SchedulerRegistry.addCronJob() method takes two arguments: a name for the CronJob, and the CronJob object itself.

JobName should be unique if scheduled cron not executed.

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