我正在使用Quartz Job執行特定任務。

我也在我的Main應用程序類中安排它的執行，而我試圖完成的工作是不允許同時執行此作業的實例。

因此，調度程序僅應在其先前實例完成后才執行作業。

這是我的工作班級：

public class MainJob implements Job {

static Logger log = Logger.getLogger(MainJob.class.getName());

@Override

public void execute(JobExecutionContext arg0) throws JobExecutionException {

GlobalConfig cfg = new GlobalConfig();

ProcessDicomFiles processDicomFiles = new ProcessDicomFiles();

ProcessPdfReportFiles processPdf = new ProcessPdfReportFiles();

try {

log.info("1. ---- SCHEDULED JOB -- setStudiesReadyToProcess");

processDicomFiles.setStudiesReadyToProcess();

log.info("2. ---- SCHEDULED JOB --- distributeToStudies");

processDicomFiles.distributeToStudies(cfg.getAssocDir());

...

//process any incoming PDF file

log.info("11. ---- SCHEDULED JOB --- processPdfFolder");

processPdf.processPdfFolder();

} catch (Exception ex) {

Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.ERROR, null, ex);

}

log.info(">>>>>>>>>>> Scheduled Job has ended .... <<<<<<<<<<<<<<<<<<<

}

}

因此，在應用程序的主類中，我正在啟動調度程序：

...

//start Scheduler

try {

startScheduler();

} catch (SchedulerException ex) {

log.log(Level.INFO, null, ex);

}

...

public void startScheduler () throws SchedulerException {

//Creating scheduler factory and scheduler

factory = new StdSchedulerFactory();

scheduler = factory.getScheduler();

schedulerTimeWindow = config.getSchedulerTimeWindow();

JobDetailImpl jobDetail = new JobDetailImpl();

jobDetail.setName("First Job");

jobDetail.setJobClass(MainJob.class);

SimpleTriggerImpl simpleTrigger = new SimpleTriggerImpl();

simpleTrigger.setStartTime(new Date(System.currentTimeMillis() + 1000));

simpleTrigger.setRepeatCount(SimpleTrigger.REPEAT_INDEFINITELY);

simpleTrigger.setRepeatInterval(schedulerTimeWindow);

simpleTrigger.setName("FirstTrigger");

//Start scheduler

scheduler.start();

scheduler.scheduleJob(jobDetail,simpleTrigger);

}

如果另一個實例仍在運行，我想阻止調度程序啟動第二個MainJob實例…

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