Grails Quartz Plugin

Full documentation can be found here

This plugin has been updated to run on Quartz 2.2.x and no longer runs on Quartz 1.8.x. The newer version of Quartz will also allow it to be used With Terrcotta 3.6 or later (I tested on 3.7) - Ryan

This is different than the quartz2 plugin others maintain, because it does not use JobDetailsImpl, that one will not work with Terracotta due to bug. This plugin was the last holdback to allow a full Terracotta 3.7, Tomcat 7, Quartz 2.1.x, and Ehcache and Hibernate Cache solution all working at once!

Quartz plugin allows your Grails application to schedule jobs to be executed using a specified interval or cron expression. The underlying system uses the Quartz Enterprise Job Scheduler configured via Spring, but is made simpler by the coding by convention paradigm.

Installation

To install the latest stable version of the plugin add this to your BuildConfig.groovy in the plugins section (be sure to use the latest version):

compile ':quartz:1.0-RC11'

Using

Scheduling Jobs

To create a new job run the grails create-job command and enter the name of the job. Grails will create a new job and place it in the grails-app/jobs directory:

class MyJob {
    static triggers = {
        simple repeatInterval: 1000
    }

    def execute(){
        print "Job run!"
    }
}

The above example will call the 'execute' method every second.

Scheduling configuration syntax

Currently plugin supports three types of triggers:

• simple trigger — executes once per defined interval (ex. "every 10 seconds");
• cron trigger — executes job with cron expression (ex. "at 8:00 am every Monday through Friday");
• custom trigger — your implementation of Trigger interface.

Multiple triggers per job are allowed.

class MyJob {
    static triggers = {
        simple name:'simpleTrigger', startDelay:10000, repeatInterval: 30000, repeatCount: 10
        cron name:'cronTrigger', startDelay:10000, cronExpression: '0/6 * 15 * * ?'
        custom name:'customTrigger', triggerClass:MyTriggerClass, myParam:myValue, myAnotherParam:myAnotherValue
    }

    def execute() {
        println "Job run!"
    }
  }

With this configuration job will be executed 11 times with 30 seconds interval with first run in 10 seconds after scheduler startup (simple trigger), also it'll be executed each 6 second during 15th hour (15:00:00, 15:00:06, 15:00:12, ... — this configured by cron trigger) and also it'll be executed each time your custom trigger will fire.

Three kinds of triggers are supported with the following parameters:

• simple:
  • name — the name that identifies the trigger;
  • startDelay — delay (in milliseconds) between scheduler startup and first job's execution;
  • repeatInterval — timeout (in milliseconds) between consecutive job's executions;
  • repeatCount — trigger will fire job execution (1 + repeatCount) times and stop after that (specify 0 here to have one-shot job or -1 to repeat job executions indefinitely);
• cron:
  • name — the name that identifies the trigger;
  • startDelay — delay (in milliseconds) between scheduler startup and first job's execution;
  • cronExpression — cron expression
• custom:
  • triggerClass — your class which implements CalendarIntervalTriggerImpl impl;
  • any params needed by your trigger.