Cron Jobs
A scheduled method or a cron job is a method that will run periodically. By using a specific cron syntax, you can define the frequency and timing for each method.
tip
The time specified in the cron strings is in UTC. You can use this converter to convert your local time to UTC.
Use scheduled methods in your project
There are two ways to declare a scheduled method:
- Using decorators (only available for TypeScript, JavaScript and Go projects)
- Using the
genezio.yamlconfiguration file (available for all supported languages, including TypeScript, JavaScript, Go)
- Decorators (TS/JS)
- Decorators (Go)
- Configuration File (All supported languages)
cron.ts
import { GenezioDeploy, GenezioMethod } from "@genezio/types";
@GenezioDeploy()
export class BackendService {
@GenezioMethod({ type: "cron", cronString: "* * * * *" })
sayHiEveryMinute() {
console.log("I will run every minute!");
}
}
cron.go
package cron
import "fmt"
// genezio: deploy
type CronService struct {}
func New() CronService {
return CronService{}
}
// genezio: cron * * * * *
func (s CronService) SayHiEveryMinute() error {
fmt.Println("I will run every minute!")
return nil
}
genezio.yaml
name: cron-example
yamlVersion: 2
backend:
path: .
language:
name: go
classes:
# You need to identify the class by the source file
- path: cron.go
methods:
# You need to identify the method by the name
- name: sayHiEveryMinute
# Specify the `cron` method type
type: cron
# Specify the cron string that defines the frequency and timing
cronString: * * * * *
Cron strings examples
Below, you have the most commonly used cronString examples:
| Cron string | Description |
|---|---|
* * * * * | Triggers at every minute |
0/5 * * * * | Triggers every 5 minutes |
0 * * * * | Triggers every hour |
0 8 * * * | Triggers every day at 8 a.m. |
You can, also, use crontab.guru to build specific cron strings.
Examples using scheduled methods
info
For more details, check out an example using scheduled methods.
More details
For more information on genezio decorators, check out Genezio Decorators.
Next Steps
Also, you can find more details on deploying the backend and frontend here:
Now you are ready for some more advanced use cases: