Question

我有一个主线程和子线程，其中，在ScheduledThreadPool Executor中，每个固定时间，主线程用于子生成的线程池和主线程轮询数据库。我的任务是防止主线程在每个下一个延迟时间轮询数据库。如何做到这一点，以防止主服务器每隔5分钟（固定的延迟时间）轮询数据库

它应该像这样工作：仅轮询DB一次即可获得活动进程列表。对于每个计划的固定延迟，子线程应在执行时无需再次轮询数据库

@Scheduled（fixedDelayString = 30000）

public void processServices() {

    try {

        logger.debug("Entering processServices in MasterProcessThread ");

        // Getting process details and schedule
        List<ProcessDomain> activeProcessList = processDomainDao.getActiveProcessDomainSchedule();

        logger.info("getDomainData for flag is Active :: " + activeProcessList.size());

        // Iterating over active processList to create child threads
        for (ProcessDomain activeProcessDomain : activeProcessList) {

            Timestamp nextRunTS = activeProcessDomain.getProcessSchedule().getProcessNextRunScheduleTime();

            Long nextRunTime = (nextRunTS != null ? nextRunTS.getTime() : null);
            Long startTS = activeProcessDomain.getProcessSchedule().getProcessScheduleTime().getTime();
            Long currentTS = System.currentTimeMillis();
            boolean isPreviousRunSucc = (activeProcessDomain.getProcessRunHistory().getPreviousSuccFlag() != null
                    && activeProcessDomain.getProcessRunHistory().getPreviousSuccFlag().equals("Y")) ? true : false;
            Future future = null;

            // Initializing the child threads and start processing
            if (((nextRunTime == null && currentTS >= startTS) || (nextRunTime != null && currentTS >= nextRunTime))
                    && isPreviousRunSucc) {
                Callable task = beanServiceThreadFactory.getBeanThread(activeProcessDomain.getProcessName(),
                        activeProcessDomain);
                future = stp.submit(task);
                if (future.isDone()){
                    stp.shutdown();
                }
            }
        }
    } catch (Exception e) {

固定延迟的主线程调用数据库

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