Timer implementation in spring

Using quartz in spring, this article describes Spring3.0 's self-developed scheduled Task tool, spring task, which can be compared to a lightweight quartz, and it's simple to use, except that spring-related packages do not require additional packages.
The following two ways to implement the spring timer function, One is based on the XML configuration , one is based on the annotation of the way , we choose according to their own projects appropriate.

One: Based on the way XML is configured

1: Writing the Ordinary Pojo class

 Package Com.aflyun.web.task; Import org.springframework.stereotype.Component; Import Org.springframework.stereotype.Service; @Component //  publicclass  taskcool {    /**     * First timer test method      */public    void  testjob () {        System.out.println ("test First taskjob .... ");    }}

2: Configuration XML file

<?XML version= "1.0" encoding= "UTF-8"?><BeansXmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"Xmlns:tx= "Http://www.springframework.org/schema/tx"XMLNS:AOP= "HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP"Xmlns:context= "Http://www.springframework.org/schema/context"Xmlns:task= "Http://www.springframework.org/schema/task"xmlns= "Http://www.springframework.org/schema/beans"xsi:schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd Http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd HTTP://WWW.SP RINGFRAMEWORK.ORG/SCHEMA/AOP http://www.springframework.org/schema/aop/spring-aop.xsd Http://www.springframewo Rk.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd Http://www.springframew Ork.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd ">    <Context:component-scanBase-package= "Com.aflyun.web" />    <Aop:aspectj-autoproxyProxy-target-class= "true" />    <Context:annotation-config/>    <!--Configure in Applicationcontext.xml, use the name of the Timer Ref:pojo class method: The name of the call cron:cronexpression expression  cron= "0/5 * * * *?" Represents five seconds to execute once -    <Task:scheduled-tasks>        <task:scheduledref= "Taskcool"Method= "Testjob"Cron= "0/5 * * * *?"/>    </Task:scheduled-tasks></Beans>

Note : The namespace and schema of the task must be added to the main configuration file above.
above ref= "Taskcool", the default is the Taskcool class of the first letter lowercase value , if need to modify can be modified in the @component,

For example, below
The @Component ("Taskcooljob") is ref= "Taskcooljon".
This is done based on the XML configuration, and you can see the effect on the run!

Two: annotation -based approach

It is much easier to use annotations without having to write a task class and configure it in an XML file. Using Spring's @Scheduled, let's take a look at the definition of @scheduled in the source file :

  @Target ({Java.lang.annotation.ElementType.METHOD, Java.lang.annotation.ElementType.ANNOTATION_TYPE}) @Retention (retentionpolicy.runtime) @Documented  public  @interface   Scheduled { public  abstract   String cron ();  public  abstract  long   Fixeddelay ();  public  abstract  long   Fixedrate (); }  

Cron: indicates the specified cron expression.
Fixeddelay: represents the interval from the beginning of the previous task completion to the start of the next task, in milliseconds.
Fixedrate: represents the interval from the beginning of the previous task to the start of the next task, in milliseconds.
The following is a specific configuration process:
1: Writing the Pojo class

 Package Com.tclshop.cms.center.web.task; Import org.springframework.scheduling.annotation.Scheduled; Import org.springframework.stereotype.Component; @Component  Public class webtask {    //  every five seconds    @Scheduled (cron = "0/5 * * * * *?") )    publicvoid  taskjob () {        System.out.println ("test second Annotation style ... ");     }

2: Configuration XML file
The relevant configuration file content is posted below:

<!-- This configuration is enabled for spring to recognize @scheduled   annotations  -      <  Scheduler= "Qbscheduler"  mode= "proxy"/>       <id= "Qbscheduler"  pool-size= "Ten"/> 

Note: Theoretically only need to add this sentence configuration can be, other parameters are not necessary.
The configuration is complete, the operation can see the effect!

Summary: The use of this timer, do not need to integrate other parent class timers, easy to use! The function is also very powerful!

Attached: Configuration instructions for cronexpression

Field      Allow value     allowed special characters sec       0-59        ,-*/min       0-59        ,-*/hour      0-23        ,-*/Date      1-31        ,-*?/L W C month      1-12 or Jan-dec     ,-*/week      1-7 or Sun-sat      ,-*?/L C #年 (optional) Leave       blank, 1970-2099       ,-*/

Example:

cron expression          " 0 0 12 * *? " "0 * * *"    "0 15 10 * *?"      "0 * * * *"    "0    * * * * * * * * * * * * * * * * * * * * * * * * 2005" 0 * 14 * *           "0 0/5 14 * *?"      "0 0/5 14,18 * *?"      "0 0-5 14 * *?" "0 10,44 3 WED"    "0" * mon-fri "         

Timer implementation in spring