Friday, May 4, 2012

Spring 3 Task Execution and Scheduling


I have downloaded Spring3 and Quartz and Spring batch Framework.
After running a simple example, It was not easy, not working well with autowired annotation and many things to learn before use giant functions. currently, Spring batch depend on spring 2.5 that I am not sure, it will work well with Spring 3.1
It is also causing to make big packaging jar/war file

I just wanted to make a very simple batch program that I can use based on SpringFramwork which can autowire beans and DB resources.
I decide to use Spring Task. It just need Spring framework, nothing else
It is extreamly simple and works perfect as I expected.

Just type 3 more line on you spring xml file

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:util="http://www.springframework.org/schema/util" xmlns:p="http://www.springframework.org/schema/p"
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/util
        http://www.springframework.org/schema/util/spring-util-3.0.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">


<context:component-scan base-package="monitor"/>

<mvc:annotation-driven />

<!--  Omit all the WEB MVC Handler and View Resolver Configuration -->


<!--  Scheduler define start -->
<task:annotation-driven executor="myExecutor" scheduler="myScheduler"/>

<task:executor id="myExecutor" pool-size="5"/>

<task:scheduler id="myScheduler" pool-size="10"/>
<!--  Scheduler define End -->

</beans>

Make one Class that is Component annotated. The Class must be in base-package or sub package.
and make method that is Scheduled annotated with Cron Expression.
That's it. that it will run every 5 minutes from 2 min of the hour.
You can autowire beasn which you like.

package monitor.batch;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class HarvestHttpStatusJob {

 private final Log logger = LogFactory.getLog(this.getClass());

 //To-do  @Autowired beans as usual you need.

 @Scheduled(cron = "0 2/5 * * * *")
 public void harvestStatus() {

  logger.info(this.getClass().getName() + " Start");

  //To do Implement your code

  logger.info(this.getClass().getName() + " Finish");
 }

}

For more Detail Information. Please refer below document from SpringFramwork.
http://static.springsource.org/spring/docs/3.1.1.RELEASE/spring-framework-reference/html/scheduling.html

If you are interested in Spring batch and quartz, Please refer below link
Spring batch and quartz



3 comments:

  1. Nice post Jack... Thanks for posting this.

    By the way, if I want to take the cron value from any database or property, how to do it?
    Thanks

    ReplyDelete
    Replies
    1. Hi ffredie,
      Thanks for visiting.
      What I can try is, ussing SPEL which can get value from property or use Spring Java configuration which can configure property and bean by java code.
      I haven't tried though. It might work.
      Sorry, I don't have a sample.
      BR,

      Delete
  2. Completely disagree with "quartz + Spring" was not easy...

    have you tried this?
    http://briansjavablog.blogspot.com/2012/09/spring-quartz-tutorial.html

    ReplyDelete