Exception while running Quartz Schdular program

Question

hi,

i am getting he following Exception while running my Quartz Schdular program.

Below is the exception Trace

Mar 26, 2010 2:54:24 PM org.quartz.core.QuartzScheduler start INFO: Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started. Exception in thread "main" java.lang.IllegalArgumentException: Job class must implement the Job interface. at org.quartz.JobDetail.setJobClass(JobDetail.java:291) at org.quartz.JobDetail.(JobDetail.java:138) at com.Quarrtz.RanchSchedule.main(RanchSchedule.java:18)

i have included Quartz-1.7.2.jar and Quartz-all-1.7.2.jar in my class path along with commom-logging 1.1.jar and jdk 6

this is an example i have copy and pasted from JAVA RANCH

http://www.javaranch.com/journal/200711/combining_spring_and_quartz.html

First example in the above page

any help pls

my code as follows

**public interface Job {

void execute (JobExecutionContext ctx);

}**

**public class RanchJob implements Job {

public void execute (JobExecutionContext ctx) throws JobExecutionException {
    System.out.println("[JOB] Welcome at JavaRanch");
}

}**

**public class RanchSchedule {

public static void main (String[] args) {       
    try {
        SchedulerFactory factory = new org.quartz.impl.StdSchedulerFactory();

        Scheduler scheduler = factory.getScheduler();
        scheduler.start();

        JobDetail jobDetail = new JobDetail("ranchJob", null, RanchJob.class);
        // Fires every 10 seconds
        Trigger ranchTrigger = TriggerUtils.makeSecondlyTrigger(10); 
        ranchTrigger.setName("ranchTrigger");

        scheduler.scheduleJob(jobDetail, ranchTrigger);
    } catch (SchedulerException ex) {
        ex.printStackTrace();
    }
}

}**

thanx in advance

Sunny Mate

Answer 1

Don't include both Quartz-1.7.2.jar and Quartz-all-1.7.2.jar - include one or the other, or you risk weird classloading bugs, which your problem sounds like.

Answer 2

Have you written the Job interface in your source code ?

public interface Job {
    void execute (JobExecutionContext ctx);
}

If so, you don't have to do this. Quartz has its own Job interface (in the quartz.jar). Keep only your RanchJob and RanchSchedule classes and it should work.