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@ -70,6 +70,7 @@ public class JobScheduleHelper {
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connAutoCommit = conn.getAutoCommit();
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conn.setAutoCommit(false);
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//通过这个来控制多节点只有一个节点会执行 low的一笔
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preparedStatement = conn.prepareStatement( "select * from xxl_job_lock where lock_name = 'schedule_lock' for update" );
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preparedStatement.execute();
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@ -77,18 +78,21 @@ public class JobScheduleHelper {
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// 1、pre read
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long nowTime = System.currentTimeMillis();
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//下次执行时间 在5秒内的
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List<XxlJobInfo> scheduleList = XxlJobAdminConfig.getAdminConfig().getXxlJobInfoDao().scheduleJobQuery(nowTime + PRE_READ_MS, preReadCount);
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if (scheduleList!=null && scheduleList.size()>0) {
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// 2、push time-ring
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for (XxlJobInfo jobInfo: scheduleList) {
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// time-ring jump
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// 当前时间>下次执行时间+5秒 任务触发过期策略
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if (nowTime > jobInfo.getTriggerNextTime() + PRE_READ_MS) {
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// 2.1、trigger-expire > 5s：pass && make next-trigger-time
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logger.warn(">>>>>>>>>>> xxl-job, schedule misfire, jobId = " + jobInfo.getId());
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// 1、misfire match
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MisfireStrategyEnum misfireStrategyEnum = MisfireStrategyEnum.match(jobInfo.getMisfireStrategy(), MisfireStrategyEnum.DO_NOTHING);
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//如果过期策略是立即执行一次则 执行
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if (MisfireStrategyEnum.FIRE_ONCE_NOW == misfireStrategyEnum) {
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// FIRE_ONCE_NOW 》 trigger
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JobTriggerPoolHelper.trigger(jobInfo.getId(), TriggerTypeEnum.MISFIRE, -1, null, null, null);
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@ -96,19 +100,25 @@ public class JobScheduleHelper {
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}
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// 2、fresh next
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//刷新下次执行时间
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refreshNextValidTime(jobInfo, new Date());
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} else if (nowTime > jobInfo.getTriggerNextTime()) {
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}
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//当前时间>下次执行时间 但是控制在5秒内
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else if (nowTime > jobInfo.getTriggerNextTime()) {
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// 2.2、trigger-expire < 5s：direct-trigger && make next-trigger-time
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// 1、trigger
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//执行
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JobTriggerPoolHelper.trigger(jobInfo.getId(), TriggerTypeEnum.CRON, -1, null, null, null);
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logger.debug(">>>>>>>>>>> xxl-job, schedule push trigger : jobId = " + jobInfo.getId() );
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// 2、fresh next
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//刷新下次执行时间
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refreshNextValidTime(jobInfo, new Date());
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// next-trigger-time in 5s, pre-read again
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//如果任务在执行中 且 下次执行时间在5秒内 则将 任务 缓存到 ringData
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if (jobInfo.getTriggerStatus()==1 && nowTime + PRE_READ_MS > jobInfo.getTriggerNextTime()) {
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// 1、make ring second
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@ -122,7 +132,9 @@ public class JobScheduleHelper {
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}
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} else {
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}
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//还没到下次执行时间的 缓存到 ringData
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else {
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// 2.3、trigger-pre-read：time-ring trigger && make next-trigger-time
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// 1、make ring second
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@ -199,6 +211,7 @@ public class JobScheduleHelper {
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if (cost < 1000) { // scan-overtime, not wait
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try {
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// pre-read period: success > scan each second; fail > skip this period;
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//随机休眠 没任务则休眠5秒内 有任务则休眠1秒内
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TimeUnit.MILLISECONDS.sleep((preReadSuc?1000:PRE_READ_MS) - System.currentTimeMillis()%1000);
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} catch (InterruptedException e) {
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if (!scheduleThreadToStop) {
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liyong
4 years ago