An example of a spring Scheduler (Quartz) dynamic Add, delete, modify task

Requirements

Perform an indefinite number of scheduled tasks according to the task list. and need to dynamically add, delete, modify the task.

Code

Public class jobexample {     public static void main ( String[] args)  throws Exception {        //  Job configuration information, which can be obtained from the database or the configuration file         list<jobparameter> list  = new ArrayList<JobParameter> (        string);  jobGroup =  "JobGroup1";        for  (int i  = 1; i < 4; i++)  {             jobparameter param = new jobparameter ();             param.setjobname ("Job"  + i);             param.setjobgroup (Jobgroup);           &nbSp; param.setcronexpression ("0/5&NBSP;*&NBSP;*&NBSP;*&NBSP;*&NBSP;?");             param.setdescription ("Execute job   " + i + "  every 5 seconds&nbsp ... ");             list.add (param);         }         AbstractApplicationContext context = new  Classpathxmlapplicationcontext ("Dynamic-jobs.xml");         try {             Scheduler scheduler =  ( Scheduler)  context.getbean ("Scheduler");             // ###  Create and start job ###             for  (Jobparameter param : lisT)  {                //   Build Job Information                  Jobdetail jobdetail = jobbuilder.newjob (Myjob.class)                          . Withidentity (Param.getjobname (),  param.getjobgroup ()). Build ();                 //  Expression Scheduler Builder                  cronschedulebuilder schedulebuilder =  cronschedulebuilder.cronschedule (Param.getcronexpression ());                 //  build trigger    by cronexpression expression               crontrigger trigger = triggerbuilder.newtrigger (). Withidentity (Param.getjobname (),  param.getjobgroup ())                          .withschedule ( Schedulebuilder). Build ();                 //  put parameters, run-time method can get                  jobdetail.getjobdatamap (). Put ("Jobparam",  param);                 scheduler.schedulejob (jobDetail,  Trigger);            }             // ###  Remove job3 ###           &nBsp; thread.sleep (;            ) System.out.println ("###  remove job3 ###");             scheduler.deletejob (Jobkey.jobkey ("Job3",  jobgroup));             // ###  suspension of Job1 and job2 ###             thread.sleep (;         )    system.out.println ("###  pause Job1 and job2 ###");             scheduler.pausejob (Jobkey.jobkey ("Job1",  jobgroup));             scheduler.pausejob (JobKey.jobKey ("Job2",  Jobgroup));            // ###  Start again Job1  ###     &nbsP;      thread.sleep (;        )     system.out.println ("###  start job1 ### again");             scheduler.resumejob (Jobkey.jobkey ("Job1",  jobgroup));             // ###  Modify JOB1 's cron ###             thread.sleep (;     )        system.out.println ("###  modifies Job1 's cron to perform  ### every 3 seconds");             TriggerKey triggerKey =  Triggerkey.triggerkey ("Job1",  jobgroup);             cronschedulebuilder schedulebuilder = cronschedulebuilder.cronschedule ("0/3 *  * * * ? ");             crontrigger trigger =  ( Crontrigger)  scheduler.gettrigger (Triggerkey);             trigger = trigger.gettriggerbuilder (). withidentity (TriggerKey). WithSchedule ( Schedulebuilder). Build ();            //  Get the job parameters and modify the description             jobparameter jobparam  =  (Jobparameter)  scheduler.getjobdetail (Jobkey.jobkey ("Job1",  jobgroup))                                                                        .getjobdatamap (). Get (Jobparameter.job_param);             jobparam.setcronexpression ("0/3&NBSP;*&NBSP;*&NBSP;*&NBSP;*&NBSP;?");             jobparam.setdescription ("Execute  JOB&NBSP;1&NBSP;EVERY&NBSP;3&NBSP;SECONDS&NBSP, ... ");             scheduler.reschedulejob (Triggerkey, trigger);             //  Print all  Job          in memory    thread.sleep (;            ) System.out.println ("###  the status of all  job in print memory  ###");             set<triggerkey> triggerkeys = scheduler.gettriggerkeys ( Groupmatcher.anytriggergroup ()); &NBSP;&NBsp;          for  (triggerkey tkey :  Triggerkeys)  {                 CronTrigger t =  (Crontrigger)  scheduler.gettrigger (TKey);                 system.out.println ("Trigger  details:  " + t.getjobkey (). GetName ()  + ",  " + t.getjobkey (). Getgroup ()                          +  ", "  + scheduler.gettriggerstate (tKey)  +  " ,  " + t.getfinalfiretime ()  + ",  "                         +  T.getcronexpression ()); &NBSP;&Nbsp;          }         } finally {            if  ( Context != null)  {                 context.close ();             }            system.out.println ("Spring  context is closed. ");         }    }}

public class jobparameter {    public  static final String JOB_PARAM =  "Jobparam";     private  String jobName;    private String jobGroup;     private string jobtrigger;    private string status;     private string cronexpression;    private boolean issync =  false;    private String description;    private  Date updatedtime = new date ();    getter & setter  ...}

public class myjob implements job {    public void  Execute (jobexecutioncontext jobexecutioncontext)  throws JobExecutionException {         JobParameter jobParam =  (Jobparameter)   Jobexecutioncontext.getjobdetail (). Getjobdatamap ()                  .get (Jobparameter.job_param);         if  (jobparam != null)  {             system.out.println (Jobparam.getdescription ());         }  else {            system.out.println (" Hey, can ' t find job parameter :) ");         }    }}

Dynamic-jobs.xml

<bean id= "Scheduler" class= "Org.springframework.scheduling.quartz.SchedulerFactoryBean"/>

Execution results

Execute Job 1 every 5 seconds ...

Execute Job 2 every 5 seconds ...

Execute Job 3 every 5 seconds ...

# # # removal JOB3 # # #

Execute Job 1 every 5 seconds ...

Execute Job 2 every 5 seconds ...

# # # Pause Job1 and Job2 # # #

# # # starts again job1 # # #

Execute Job 1 every 5 seconds ...

Execute Job 1 every 5 seconds ...

# # # Modify JOB1 cron to execute once every 3 seconds # # #

Execute Job 1 every 3 seconds ...

Execute Job 1 every 3 seconds ...

# # # Print the status of all jobs in memory # # #

Execute Job 1 every 3 seconds ...

Trigger details:job1, JobGroup1, NORMAL, NULL, 0/3 * * * *?

Trigger details:job2, JobGroup1, PAUSED, NULL, 0/5 * * * *?

Version information

Quartz version: 2.2.1

Spring Version: 3.2.13

Resources

Http://docs.spring.io/spring/docs/current/spring-framework-reference/html/scheduling.html#scheduling-quartz

http://www.meiriyouke.net/?p=82

Complete example code see attachment

An example of a spring Scheduler (Quartz) dynamic Add, delete, modify task