Quartz job stop if it is already running

Khalid Salameh 1

Hello,

I have a job with a for loop, job keep checking pending applications to send it to WCF service, some times the for loop not finished but the second job started, in this case I got duplicate applications because it is exist in first loop and second loop.

I need to stop the code/loop at all in first job once time of second job starting

int everyMinutes = Convert.ToInt32(WebConfigurationManager.AppSettings["Scheduler__Minutes"]); // 3 minutes  
                    //** Pause current job, so it won't fire again while executing.  
                    IScheduler scheduler = StdSchedulerFactory.GetDefaultScheduler();  
                    scheduler.Start();  
                    IJobDetail job = JobBuilder.Create<ApplicationsJob>().Build();  
                    ITrigger trigger = TriggerBuilder.Create()  
                        .WithIdentity("AppJob", "Group1")  
                        .StartNow()  
                        .WithSimpleSchedule(x => x  
                        .WithIntervalInMinutes(everyMinutes )  
                        .RepeatForever())  
                        .Build();  
                    scheduler.ScheduleJob(job, trigger);

Thanks

Lan Huang-MSFT 25,386 Reputation points Microsoft Vendor

2022-11-07T05:28:45.573+00:00
Hi @Khalid Salameh ,
If you want to stop and start a specific job, you can use this:

scheduler.PauseJob(jobdetay.Key); scheduler.ResumeJob(jobdetay.Key);

Best regards,
Lan Huang

Khalid Salameh 1

Dear LanHuang, thanks for your reply

I tried the below but still the job running twice, issue not solved.

// Below code is on Global.asax > Application_Start()

    if (Convert.ToBoolean(WebConfigurationManager.AppSettings["ApplicationJobEnabled"]))  
                    {  
                        ScheduleEngine<ApplicationJob>.RunEveryGivenMinutes(  
                            Convert.ToInt32(WebConfigurationManager.AppSettings["Scheduler_ApplicationJob_RunEvery"]), // 3 minuts  
                             "ApplicationsJob" // Job Key name  
                            );  
                    }

// My job

public class ApplicationJob : IJob  
        {  
            public void Execute(IJobExecutionContext context)  
            {  
                //throw new NotImplementedException();  
                lock (this)  
                {  
                    //** Pause current job, so it won't fire again while executing.  
                    IScheduler scheduler = StdSchedulerFactory.GetDefaultScheduler();  
                    scheduler.PauseJob(new JobKey("ApplicationsJob"));  
                    //SendApplications();  
                    scheduler.ResumeJob(new JobKey("ApplicationsJob"));  
                }  
            }  
        }

Lan Huang-MSFT 25,386 Reputation points Microsoft Vendor

2022-11-08T08:19:56.837+00:00
Hi @Khalid Salameh ,
PauseJob is stopped and ResumeJob is started. What you use together is to start immediately after stopping.

var scheduler = StdSchedulerFactory.GetDefaultScheduler(); scheduler.PauseJob(new JobKey("Job1Identity", "yourGroup"));

Best regards,
Lan Huang
Khalid Salameh 1 Reputation point

2022-11-08T08:55:00.473+00:00

Hi LanHuang, I used the ResumeJob to be after the function of loop finihsed... Should I add it inside the method once the loop finish?