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=== Trigger Usage

A trigger determines when a job runs. Triggers are declared in the `static triggers` block of a job class in `grails-app/jobs`, and a job may declare as many as it needs:

[source,groovy]
----
class MyJob {

    static triggers = {
        simple name: 'everyMinute', repeatInterval: 60000
        cron name: 'everyMorning', cronExpression: '0 0 6 * * ?'
    }

    void execute() {
        println 'Job run!'
    }
}
----

Three trigger types are available: `simple`, `cron`, and `custom`. Every trigger accepts a `name` — which must be unique across the whole application — a `group`, and a `startDelay` in milliseconds.

Refer to the user guide topic on link:{guidePath}backgroundJobs.html#quartzTriggers[Triggers] for more information.
