{"id":1474,"date":"2012-07-27T01:00:00","date_gmt":"2012-07-27T01:00:00","guid":{"rendered":"http:\/\/www.javacodegeeks.com\/2012\/10\/quartz-2-scheduler-example.html"},"modified":"2015-08-19T09:42:38","modified_gmt":"2015-08-19T06:42:38","slug":"quartz-2-scheduler-example","status":"publish","type":"post","link":"https:\/\/www.javacodegeeks.com\/2012\/07\/quartz-2-scheduler-example.html","title":{"rendered":"Quartz 2 Scheduler example"},"content":{"rendered":"

Quartz is an open source job scheduling framework. It can be used to manage and schedule jobs in the application. <\/p>\n

STEP 1 : CREATE MAVEN PROJECT<\/h2>\n

A maven project is created as below. (It can be created by using Maven or IDE Plug-in).
\n 
\n 
\n\"Quartz2\"<\/a><\/p>\n

STEP 2 : LIBRARIES<\/h2>\n

Quartz dependencies are added to Maven\u2019 s pom.xml. These dependency libraries will be downloaded by Maven Central Repository.<\/p>\n

<project xmlns=\"http:\/\/maven.apache.org\/POM\/4.0.0\" xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\r\n xsi:schemaLocation=\"http:\/\/maven.apache.org\/POM\/4.0.0 http:\/\/maven.apache.org\/xsd\/maven-4.0.0.xsd\">\r\n <modelVersion>4.0.0<\/modelVersion>\r\n <groupId>OTV_Quartz<\/groupId>\r\n <artifactId>OTV_Quartz<\/artifactId>\r\n <version>0.0.1-SNAPSHOT<\/version>\r\n\r\n <dependencies>\r\n\r\n  <!-- Quartz library -->\r\n  <dependency>\r\n      <groupId>org.quartz-scheduler<\/groupId>\r\n      <artifactId>quartz<\/artifactId>\r\n      <version>2.0.2<\/version>\r\n  <\/dependency>   \r\n\r\n  <!-- Log4j library -->\r\n  <dependency>\r\n      <groupId>log4j<\/groupId>\r\n      <artifactId>log4j<\/artifactId>\r\n      <version>1.2.16<\/version>\r\n  <\/dependency> \r\n\r\n <\/dependencies>\r\n\r\n<\/project>\r\n<\/pre>\n
STEP 3 : CREATE NEW JOB<\/h2>\n
A new Job is created by implementing the Quartz Job interface as below. TestJob Class specifies business logic which will be scheduled.<\/p>\n
package com.otv.job;\r\n\r\nimport org.apache.log4j.Logger;\r\nimport org.quartz.Job;\r\nimport org.quartz.JobExecutionContext;\r\nimport org.quartz.JobExecutionException;\r\n\r\npublic class TestJob implements Job {\r\n\r\n   private Logger log = Logger.getLogger(TestJob.class);\r\n\r\n   public void execute(JobExecutionContext jExeCtx) throws JobExecutionException {\r\n      log.debug(\"TestJob run successfully...\");\r\n   }\r\n\r\n}\r\n<\/pre>\n
STEP 4 : LINK JOB WITH JOBDETAIL OBJECT<\/h2>\n
Created TestJob class is linked with a JobDetail object.
 
<\/div> <\/div><\/p>\n
JobDetail job = JobBuilder.newJob(TestJob.class)\r\n       .withIdentity(\"testJob\")\r\n       .build();\r\n<\/pre>\n
STEP 5 : CREATE NEW TRIGGER<\/h2>\n
A new trigger is created as below. Trigger Class specifies running period of the job which will be scheduled. There are two kind of Quartz Triggers as:           <\/p>\n
Trigger<\/strong> :<\/strong> specifies start time, end time, running period of the job.           <\/p>\n
CronTrigger<\/strong> :<\/strong> specifies start time, end time, running period of the job according to Unix cron expression.<\/p>\n
\/\/Trigger the job to run on the next round minute\r\nTrigger trigger = TriggerBuilder.newTrigger()\r\n        .withSchedule(\r\n                     SimpleScheduleBuilder.simpleSchedule()\r\n                     .withIntervalInSeconds(30)\r\n                     .repeatForever())\r\n                                   .build();\r\n\r\n\/\/ CronTrigger the job to run on the every 20 seconds\r\nCronTrigger cronTrigger = TriggerBuilder.newTrigger()\r\n                             .withIdentity(\"crontrigger\",\"crontriggergroup1\")\r\n                             .withSchedule(CronScheduleBuilder.cronSchedule(\"10 * * * * ?\"))\r\n                             .build();\r\n<\/pre>\n
STEP 6 : CREATE SchedulerFactory <\/h2>\n
A new SchedulerFactory is created and a Scheduler object is gotten from SchedulerFactory Class.<\/p>\n
SchedulerFactory schFactory = new StdSchedulerFactory();\r\nScheduler sch = schFactory.getScheduler();\r\n<\/pre>\n
STEP 7 : START Scheduler <\/h2>\n
Scheduler Object is started.<\/p>\n
\/\/ Start the schedule\r\nsch.start();\r\n<\/pre>\n
STEP 8 : SCHEDULE JOB<\/h2>\n
TestJob is scheduled:<\/p>\n
\/\/ Tell quartz to schedule the job using the trigger\r\nsch.scheduleJob(job, trigger);\r\n<\/pre>\n
STEP 9 : FULL EXAMPLE<\/h2>\n
TestJob will run two times per minute.<\/p>\n
package com.otv;\r\n\r\nimport org.quartz.JobBuilder;\r\nimport org.quartz.JobDetail;\r\nimport org.quartz.Scheduler;\r\nimport org.quartz.SchedulerException;\r\nimport org.quartz.SchedulerFactory;\r\nimport org.quartz.SimpleScheduleBuilder;\r\nimport org.quartz.Trigger;\r\nimport org.quartz.TriggerBuilder;\r\nimport org.quartz.impl.StdSchedulerFactory;\r\n\r\nimport com.otv.job.TestJob;\r\n\r\n\/**\r\n* @author onlinetechvision.com\r\n* @since 17 Sept 2011\r\n* @version 1.0.0\r\n*\r\n*\/\r\npublic class JobScheduler {\r\n\r\n   public static void main(String[] args) {\r\n\r\n      try {\r\n\r\n         \/\/ specify the job' s details..\r\n         JobDetail job = JobBuilder.newJob(TestJob.class)\r\n                                   .withIdentity(\"testJob\")\r\n                                   .build();\r\n\r\n         \/\/ specify the running period of the job\r\n         Trigger trigger = TriggerBuilder.newTrigger()\r\n                                         .withSchedule(SimpleScheduleBuilder.simpleSchedule()\r\n                                                                            .withIntervalInSeconds(30)\r\n                                                                            .repeatForever())\r\n                                          .build();\r\n\r\n         \/\/schedule the job\r\n         SchedulerFactory schFactory = new StdSchedulerFactory();\r\n         Scheduler sch = schFactory.getScheduler();\r\n         sch.start();\r\n         sch.scheduleJob(job, trigger);\r\n\r\n      } catch (SchedulerException e) {\r\n         e.printStackTrace();\r\n      }\r\n   }\r\n\r\n}\r\n<\/pre>\n
STEP 10 : OUTPUT<\/h2>\n
When JobScheduler Class is run, the output will be seen as below:<\/p>\n
17.09.2011 23:39:37 DEBUG (TestJob.java:13) - TestJob run successfully...\r\n17.09.2011 23:40:07 DEBUG (TestJob.java:13) - TestJob run successfully...\r\n17.09.2011 23:40:37 DEBUG (TestJob.java:13) - TestJob run successfully...\r\n17.09.2011 23:41:07 DEBUG (TestJob.java:13) - TestJob run successfully...\r\n<\/pre>\n
STEP 11 : DOWNLOAD<\/h2>\n