quartz threw an unhandled Exception: : java.lang.NullPointerException with JSF+EJB - jsf-2

Question

I am using JSF and EJB in my project.
I have one functionality where i need to send the sms to some people for every 1 hour.
For that i am getting the information(some persons) from the database to whom i need to send.
While retrieving from the database it is throwing the following exceptions.
09:51:29,640 ERROR [org.quartz.core.JobRunShell] (DefaultQuartzScheduler_Worker-2) Job group1.job1 threw an unhandled Exception: : java.lang.NullPointerException
at hms.general.SendSMSJob.execute(SendSMSJob.java:43) [classes:]
at org.quartz.core.JobRunShell.run(JobRunShell.java:213) [quartz-all-2.1.7.jar:]
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:557) [quartz-all-2.1.7.jar:]
09:51:29,640 ERROR [org.quartz.core.ErrorLogger] (DefaultQuartzScheduler_Worker-2) Job (group1.job1 threw an exception.: org.quartz.SchedulerException: Job threw an unhandled exception. [See nested exception: java.lang.NullPointerException]
at org.quartz.core.JobRunShell.run(JobRunShell.java:224) [quartz-all-2.1.7.jar:]
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:557) [quartz-all-2.1.7.jar:]
Caused by: java.lang.NullPointerException
at hms.general.SendSMSJob.execute(SendSMSJob.java:43) [classes:]
at org.quartz.core.JobRunShell.run(JobRunShell.java:213) [quartz-all-2.1.7.jar:]
... 1 more
The following code is for scheduler
package hms.general;
import javax.faces.bean.ApplicationScoped;
import javax.faces.bean.ManagedBean;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.Trigger;
import org.quartz.impl.StdSchedulerFactory;
#ManagedBean(eager=true)
#ApplicationScoped
public class ScheduleBean {
public ScheduleBean() {
try{
Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
scheduler.start();
JobDetail job = org.quartz.JobBuilder.newJob(SendSMSJob.class).withIdentity("job1","group1").build();
Trigger trigger = org.quartz.TriggerBuilder.newTrigger().withIdentity("trigger1","group1").startNow().withSchedule(org.quartz.SimpleScheduleBuilder.simpleSchedule().withIntervalInHours(1).repeatForever()).build();
scheduler.scheduleJob(job,trigger);
}
catch(SchedulerException se){
se.getMessage();
}
}
}
Code for JobScheduler
import hms.db.PatientRegEMRemote;
import hms.db.Prescription;
import hms.db.PrescriptionEMRemote;
import java.util.List;
import javax.ejb.EJB;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
public class SendSMSJob implements Job {
#EJB(mappedName = "java:global/Hms-Main/PatientRegEM!hms.db.PatientRegEMRemote")
public PatientRegEMRemote patreg_r;
#EJB(mappedName = "java:global/Hms-Main/PrescriptionEM!hms.db.PrescriptionEMRemote")
private PrescriptionEMRemote prescription_r;
public static void main(String ar[]){
SendSMSJob hj = new SendSMSJob();
try {
hj.execute(null);
} catch (JobExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
#Override
public void execute(JobExecutionContext arg0) throws JobExecutionException {
System.out.println(arg0.getJobDetail());
System.out.println("I am in execute method....");
// TODO Auto-generated method stub
System.out.println("Im inside execute method");
String s="select p from prescription p where p.smsflag=1";
System.out.println(s);
List<Prescription> pre=prescription_r.retrieveAll(s);
System.out.println(".........");
for (Prescription p : pre) {
System.out.println(p.getAppointno());
}
}
}

Answer 1

List pre=prescription_r.retrieveAll(s);
Seems like prescription_r is appearing null here. Not sure. Just check with breakpoint.