Elysia.js

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Cron Plugin ​

This plugin adds support for running cronjob in Elysia server.

Install with:

bash
bun add @elysiajs/cron

bun add @elysiajs/cron

Then use it:

typescript
import { Elysia } from 'elysia'
import { cron } from '@elysiajs/cron'

new Elysia()
    .use(
        cron({
            name: 'heartbeat',
            pattern: '*/10 * * * * *',
            run() {
                console.log('Heartbeat')
            }
        })
    )
    .listen(8080)

import { Elysia } from 'elysia'
import { cron } from '@elysiajs/cron'

new Elysia()
    .use(
        cron({
            name: 'heartbeat',
            pattern: '*/10 * * * * *',
            run() {
                console.log('Heartbeat')
            }
        })
    )
    .listen(8080)

The above code will log heartbeat every 10 seconds.

cron ​

Create a cronjob for Elysia server.

type:

cron(config: CronConfig, callback: (Instance['store']) => void): this

cron(config: CronConfig, callback: (Instance['store']) => void): this

CronConfig accept the parameters specified below:

name ​

Job name to register to store.

This will register the cron instance to store with a specified name, which can be used to reference in later processes eg. stop the job.

pattern ​

Time to run the job as specified by cron syntax specified as below:

┌────────────── second (optional)
│ ┌──────────── minute
│ │ ┌────────── hour
│ │ │ ┌──────── day of month
│ │ │ │ ┌────── month
│ │ │ │ │ ┌──── day of week
│ │ │ │ │ │
* * * * * *

┌────────────── second (optional)
│ ┌──────────── minute
│ │ ┌────────── hour
│ │ │ ┌──────── day of month
│ │ │ │ ┌────── month
│ │ │ │ │ ┌──── day of week
│ │ │ │ │ │
* * * * * *

This can be generated by tools like Crontab Guru

This plugin extends cron method to Elysia using cronner.

Below are the config accepted by cronner.

timezone ​

Time zone in Europe/Stockholm format

startAt ​

Schedule start time for the job

stopAt ​

Schedule stop time for the job

maxRuns ​

Maximum number of executions

catch ​

Continue execution even if an unhandled error is thrown by a triggered function.

interval ​

The minimum interval between executions, in seconds.

Pattern ​

Below you can find the common patterns to use the plugin.

Stop cronjob ​

You can stop cronjob manually by accessing cronjob name registered to store.

typescript
import { Elysia } from 'elysia'
import { cron } from '@elysiajs/cron'

const app = new Elysia()
    use(
        cron({
            name: 'heartbeat',
            pattern: '*/1 * * * * *',
            run() {
                console.log("Heartbeat")
            }
        }
    )
    .get('/stop', ({ store: { cron: { heartbeat } } }) => {
        heartbeat.stop()

        return 'Stop heartbeat'
    })
    .listen(8080)

import { Elysia } from 'elysia'
import { cron } from '@elysiajs/cron'

const app = new Elysia()
    use(
        cron({
            name: 'heartbeat',
            pattern: '*/1 * * * * *',
            run() {
                console.log("Heartbeat")
            }
        }
    )
    .get('/stop', ({ store: { cron: { heartbeat } } }) => {
        heartbeat.stop()

        return 'Stop heartbeat'
    })
    .listen(8080)

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