本文主要是介绍聊聊PowerJob的任务调度,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
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本文主要研究一下PowerJob的任务调度
CoreScheduleTaskManager
tech/powerjob/server/core/scheduler/CoreScheduleTaskManager.java
@Service
@Slf4j
@RequiredArgsConstructor
public class CoreScheduleTaskManager implements InitializingBean, DisposableBean {private final PowerScheduleService powerScheduleService;private final InstanceStatusCheckService instanceStatusCheckService;private final List<Thread> coreThreadContainer = new ArrayList<>();@SuppressWarnings("AlibabaAvoidManuallyCreateThread")@Overridepublic void afterPropertiesSet() {// 定时调度coreThreadContainer.add(new Thread(new LoopRunnable("ScheduleCronJob", PowerScheduleService.SCHEDULE_RATE, () -> powerScheduleService.scheduleNormalJob(TimeExpressionType.CRON)), "Thread-ScheduleCronJob"));coreThreadContainer.add(new Thread(new LoopRunnable("ScheduleDailyTimeIntervalJob", PowerScheduleService.SCHEDULE_RATE, () -> powerScheduleService.scheduleNormalJob(TimeExpressionType.DAILY_TIME_INTERVAL)), "Thread-ScheduleDailyTimeIntervalJob"));coreThreadContainer.add(new Thread(new LoopRunnable("ScheduleCronWorkflow", PowerScheduleService.SCHEDULE_RATE, powerScheduleService::scheduleCronWorkflow), "Thread-ScheduleCronWorkflow"));coreThreadContainer.add(new Thread(new LoopRunnable("ScheduleFrequentJob", PowerScheduleService.SCHEDULE_RATE, powerScheduleService::scheduleFrequentJob), "Thread-ScheduleFrequentJob"));// 数据清理coreThreadContainer.add(new Thread(new LoopRunnable("CleanWorkerData", PowerScheduleService.SCHEDULE_RATE, powerScheduleService::cleanData), "Thread-CleanWorkerData"));// 状态检查coreThreadContainer.add(new Thread(new LoopRunnable("CheckRunningInstance", InstanceStatusCheckService.CHECK_INTERVAL, instanceStatusCheckService::checkRunningInstance), "Thread-CheckRunningInstance"));coreThreadContainer.add(new Thread(new LoopRunnable("CheckWaitingDispatchInstance", InstanceStatusCheckService.CHECK_INTERVAL, instanceStatusCheckService::checkWaitingDispatchInstance), "Thread-CheckWaitingDispatchInstance"));coreThreadContainer.add(new Thread(new LoopRunnable("CheckWaitingWorkerReceiveInstance", InstanceStatusCheckService.CHECK_INTERVAL, instanceStatusCheckService::checkWaitingWorkerReceiveInstance), "Thread-CheckWaitingWorkerReceiveInstance"));coreThreadContainer.add(new Thread(new LoopRunnable("CheckWorkflowInstance", InstanceStatusCheckService.CHECK_INTERVAL, instanceStatusCheckService::checkWorkflowInstance), "Thread-CheckWorkflowInstance"));coreThreadContainer.forEach(Thread::start);}//......
}
CoreScheduleTaskManager在afterPropertiesSet的时候会启动一系列的线程,它们都是LoopRunnable类型的,分别调度powerScheduleService.scheduleNormalJob(TimeExpressionType.CRON)、powerScheduleService.scheduleNormalJob(TimeExpressionType.DAILY_TIME_INTERVAL)、powerScheduleService::scheduleCronWorkflow、powerScheduleService::scheduleFrequentJob、powerScheduleService::cleanData、instanceStatusCheckService::checkRunningInstance、instanceStatusCheckService::checkWaitingDispatchInstance、instanceStatusCheckService::checkWaitingWorkerReceiveInstance、instanceStatusCheckService::checkWorkflowInstance
LoopRunnable
@RequiredArgsConstructorprivate static class LoopRunnable implements Runnable {private final String taskName;private final Long runningInterval;private final Runnable innerRunnable;@SuppressWarnings("BusyWait")@Overridepublic void run() {log.info("start task : {}.", taskName);while (true) {try {innerRunnable.run();Thread.sleep(runningInterval);} catch (InterruptedException e) {log.warn("[{}] task has been interrupted!", taskName, e);break;} catch (Exception e) {log.error("[{}] task failed!", taskName, e);}}}}
LoopRunnable的构造器接收taskName、runningInterval、innerRunnable三个参数,其run方法通过while true循环内部执行innerRunnable.run(),执行完sleep指定的runningInterval,若捕获到InterruptedException则break跳出循环,若其他异常则打印error日志
PowerScheduleService
PowerScheduleService主要提供了scheduleNormalJob、scheduleCronWorkflow、scheduleFrequentJob、cleanData方法
scheduleNormalJob
tech/powerjob/server/core/scheduler/PowerScheduleService.java
public void scheduleNormalJob(TimeExpressionType timeExpressionType) {long start = System.currentTimeMillis();// 调度 CRON 表达式 JOBtry {final List<Long> allAppIds = appInfoRepository.listAppIdByCurrentServer(transportService.defaultProtocol().getAddress());if (CollectionUtils.isEmpty(allAppIds)) {log.info("[NormalScheduler] current server has no app's job to schedule.");return;}scheduleNormalJob0(timeExpressionType, allAppIds);} catch (Exception e) {log.error("[NormalScheduler] schedule cron job failed.", e);}long cost = System.currentTimeMillis() - start;log.info("[NormalScheduler] {} job schedule use {} ms.", timeExpressionType, cost);if (cost > SCHEDULE_RATE) {log.warn("[NormalScheduler] The database query is using too much time({}ms), please check if the database load is too high!", cost);}}
scheduleNormalJob方法主要是查询当前server负责的appId列表,然后内部委托改为scheduleNormalJob0
scheduleNormalJob0
private void scheduleNormalJob0(TimeExpressionType timeExpressionType, List<Long> appIds) {long nowTime = System.currentTimeMillis();long timeThreshold = nowTime + 2 * SCHEDULE_RATE;Lists.partition(appIds, MAX_APP_NUM).forEach(partAppIds -> {try {// 查询条件:任务开启 + 使用CRON表达调度时间 + 指定appId + 即将需要调度执行List<JobInfoDO> jobInfos = jobInfoRepository.findByAppIdInAndStatusAndTimeExpressionTypeAndNextTriggerTimeLessThanEqual(partAppIds, SwitchableStatus.ENABLE.getV(), timeExpressionType.getV(), timeThreshold);if (CollectionUtils.isEmpty(jobInfos)) {return;}// 1. 批量写日志表Map<Long, Long> jobId2InstanceId = Maps.newHashMap();log.info("[NormalScheduler] These {} jobs will be scheduled: {}.", timeExpressionType.name(), jobInfos);jobInfos.forEach(jobInfo -> {Long instanceId = instanceService.create(jobInfo.getId(), jobInfo.getAppId(), jobInfo.getJobParams(), null, null, jobInfo.getNextTriggerTime()).getInstanceId();jobId2InstanceId.put(jobInfo.getId(), instanceId);});instanceInfoRepository.flush();// 2. 推入时间轮中等待调度执行jobInfos.forEach(jobInfoDO -> {Long instanceId = jobId2InstanceId.get(jobInfoDO.getId());long targetTriggerTime = jobInfoDO.getNextTriggerTime();long delay = 0;if (targetTriggerTime < nowTime) {log.warn("[Job-{}] schedule delay, expect: {}, current: {}", jobInfoDO.getId(), targetTriggerTime, System.currentTimeMillis());} else {delay = targetTriggerTime - nowTime;}InstanceTimeWheelService.schedule(instanceId, delay, () -> dispatchService.dispatch(jobInfoDO, instanceId, Optional.empty(), Optional.empty()));});// 3. 计算下一次调度时间(忽略5S内的重复执行,即CRON模式下最小的连续执行间隔为 SCHEDULE_RATE ms)jobInfos.forEach(jobInfoDO -> {try {refreshJob(timeExpressionType, jobInfoDO);} catch (Exception e) {log.error("[Job-{}] refresh job failed.", jobInfoDO.getId(), e);}});jobInfoRepository.flush();} catch (Exception e) {log.error("[NormalScheduler] schedule {} job failed.", timeExpressionType.name(), e);}});}
scheduleNormalJob0主要是调度CRON、DAILY_TIME_INTERVAL类型的任务,它通过jobInfoRepository查找指定appId、状态启用、指定TimeExpressionType,以及NextTriggerTime小于等于
nowTime + 2 * SCHEDULE_RATE
的任务,然后挨个执行instanceService.create创建任务实例,然后放入到InstanceTimeWheelService.schedule进行调度,最后计算和更新一下每个job的nextTriggerTime
scheduleCronWorkflow
public void scheduleCronWorkflow() {long start = System.currentTimeMillis();// 调度 CRON 表达式 WORKFLOWtry {final List<Long> allAppIds = appInfoRepository.listAppIdByCurrentServer(transportService.defaultProtocol().getAddress());if (CollectionUtils.isEmpty(allAppIds)) {log.info("[CronWorkflowSchedule] current server has no app's workflow to schedule.");return;}scheduleWorkflowCore(allAppIds);} catch (Exception e) {log.error("[CronWorkflowSchedule] schedule cron workflow failed.", e);}long cost = System.currentTimeMillis() - start;log.info("[CronWorkflowSchedule] cron workflow schedule use {} ms.", cost);if (cost > SCHEDULE_RATE) {log.warn("[CronWorkflowSchedule] The database query is using too much time({}ms), please check if the database load is too high!", cost);}}
scheduleCronWorkflow主要是调度CRON 表达式 WORKFLOW,内部委托给scheduleWorkflowCore
scheduleFrequentJob
public void scheduleFrequentJob() {long start = System.currentTimeMillis();// 调度 FIX_RATE/FIX_DELAY 表达式 JOBtry {final List<Long> allAppIds = appInfoRepository.listAppIdByCurrentServer(transportService.defaultProtocol().getAddress());if (CollectionUtils.isEmpty(allAppIds)) {log.info("[FrequentJobSchedule] current server has no app's job to schedule.");return;}scheduleFrequentJobCore(allAppIds);} catch (Exception e) {log.error("[FrequentJobSchedule] schedule frequent job failed.", e);}long cost = System.currentTimeMillis() - start;log.info("[FrequentJobSchedule] frequent job schedule use {} ms.", cost);if (cost > SCHEDULE_RATE) {log.warn("[FrequentJobSchedule] The database query is using too much time({}ms), please check if the database load is too high!", cost);}}
scheduleFrequentJob主要是调度FIX_RATE/FIX_DELAY 表达式 JOB,内部委托给了scheduleFrequentJobCore
scheduleFrequentJobCore
private void scheduleFrequentJobCore(List<Long> appIds) {Lists.partition(appIds, MAX_APP_NUM).forEach(partAppIds -> {try {// 查询所有的秒级任务(只包含ID)List<Long> jobIds = jobInfoRepository.findByAppIdInAndStatusAndTimeExpressionTypeIn(partAppIds, SwitchableStatus.ENABLE.getV(), TimeExpressionType.FREQUENT_TYPES);if (CollectionUtils.isEmpty(jobIds)) {return;}// 查询日志记录表中是否存在相关的任务List<Long> runningJobIdList = instanceInfoRepository.findByJobIdInAndStatusIn(jobIds, InstanceStatus.GENERALIZED_RUNNING_STATUS);Set<Long> runningJobIdSet = Sets.newHashSet(runningJobIdList);List<Long> notRunningJobIds = Lists.newLinkedList();jobIds.forEach(jobId -> {if (!runningJobIdSet.contains(jobId)) {notRunningJobIds.add(jobId);}});if (CollectionUtils.isEmpty(notRunningJobIds)) {return;}notRunningJobIds.forEach(jobId -> {Optional<JobInfoDO> jobInfoOpt = jobInfoRepository.findById(jobId);jobInfoOpt.ifPresent(jobInfoDO -> {LifeCycle lifeCycle = LifeCycle.parse(jobInfoDO.getLifecycle());// 生命周期已经结束if (lifeCycle.getEnd() != null && lifeCycle.getEnd() < System.currentTimeMillis()) {jobInfoDO.setStatus(SwitchableStatus.DISABLE.getV());jobInfoDO.setGmtModified(new Date());jobInfoRepository.saveAndFlush(jobInfoDO);log.info("[FrequentScheduler] disable frequent job,id:{}.", jobInfoDO.getId());} else if (lifeCycle.getStart() == null || lifeCycle.getStart() < System.currentTimeMillis() + SCHEDULE_RATE * 2) {log.info("[FrequentScheduler] schedule frequent job,id:{}.", jobInfoDO.getId());jobService.runJob(jobInfoDO.getAppId(), jobId, null, Optional.ofNullable(lifeCycle.getStart()).orElse(0L) - System.currentTimeMillis());}});});} catch (Exception e) {log.error("[FrequentScheduler] schedule frequent job failed.", e);}});}
scheduleFrequentJobCore主要是调度秒级任务,它先找出秒级任务的id,然后过滤掉正在运行的任务,剩下的未运行的任务挨个判断是否需要调度,需要则执行jobService.runJob
cleanData
public void cleanData() {try {final List<Long> allAppIds = appInfoRepository.listAppIdByCurrentServer(transportService.defaultProtocol().getAddress());if (allAppIds.isEmpty()) {return;}WorkerClusterManagerService.clean(allAppIds);} catch (Exception e) {log.error("[CleanData] clean data failed.", e);}}
cleanData主要是通过WorkerClusterManagerService.clean来维护当前server负责的appId缓存
InstanceStatusCheckService
InstanceStatusCheckService提供了checkRunningInstance、checkWaitingDispatchInstance、checkWaitingWorkerReceiveInstance、checkWorkflowInstance方法
小结
PowerJob的CoreScheduleTaskManager在afterPropertiesSet的时候会启动一系列的线程,它们都是LoopRunnable类型的,其中scheduleNormalJob主要是调度CRON、DAILY_TIME_INTERVAL类型的任务,scheduleCronWorkflow主要是调度CRON 表达式 WORKFLOW任务,scheduleFrequentJob主要是调度FIX_RATE/FIX_DELAY 表达式 JOB。
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