Scheduler erstellt bei jeder Ausführung eine neue Jobinstanz basierend auf JobDetail, um das Problem des gleichzeitigen Zugriffs zu vermeiden (die Instanz von jobDetail ist ebenfalls neu).
Quzrtz geplante Aufgaben werden standardmäßig gleichzeitig ausgeführt und warten nicht darauf Die vorherige Aufgabenausführung wird abgeschlossen, sobald das Intervall abgelaufen ist. Wenn die geplante Aufgabe zu lange ausgeführt wird, werden Ressourcen für eine lange Zeit belegt und andere Aufgaben blockiert. In der Jobklasse ist die gleichzeitige Ausführung derselben Jobdefinition (definiert durch JobDetail) durch mehrere Instanzen verboten.
import org.quartz.*; import org.quartz.impl.StdSchedulerFactory; public class TaskClient { public static void main(String[] args) { JobDetail jobDetail = JobBuilder.newJob(TaskJob.class) .withIdentity("job1", "group1") //设置JOB的名字和组 .build(); Trigger trigger = TriggerBuilder.newTrigger() .withIdentity("trigger1", "trigger1") .startNow() .withSchedule(SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(1) .repeatForever()) .build(); try { Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler(); scheduler.scheduleJob(jobDetail,trigger); scheduler.start(); } catch (SchedulerException ex) { ex.printStackTrace(); } } }
TaskJob.Java
import cn.hutool.core.date.DateUtil; import org.quartz.Job; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; public class TaskJob implements Job { @Override public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException { System.out.println("TaskJob => " + DateUtil.now()); } }
usingJobData
import org.quartz.*; import org.quartz.impl.StdSchedulerFactory; public class TaskClient { public static void main(String[] args) { JobDetail jobDetail = JobBuilder.newJob(TaskJob.class) .withIdentity("job1", "group1") .usingJobData("job","jobDetail1.JobDataMap.Value") .build(); Trigger trigger = TriggerBuilder.newTrigger() .withIdentity("trigger1", "trigger1") .usingJobData("trigger","trigger.JobDataMap.Value") .startNow() .withSchedule(SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(1) .repeatForever()) .build(); try { Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler(); scheduler.scheduleJob(jobDetail,trigger); scheduler.start(); } catch (SchedulerException ex) { ex.printStackTrace(); } } }
TaskJob.java
import org.quartz.Job; import org.quartz.JobDataMap; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; public class TaskJob implements Job { @Override public void execute(JobExecutionContext context) throws JobExecutionException { JobDataMap jobDataMap = context.getJobDetail().getJobDataMap(); JobDataMap triggerMap = context.getTrigger().getJobDataMap(); JobDataMap mergeMap = context.getMergedJobDataMap(); System.out.println("jobDataMap => " + jobDataMap.getString("job")); System.out.println("triggerMap => " + triggerMap.getString("trigger")); System.out.println("mergeMap => " + mergeMap.getString("trigger")); } }
import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
public class TaskClient {
public static void main(String[] args) {
JobDetail jobDetail = JobBuilder.newJob(TaskJob.class)
.withIdentity("job1", "group1")
.usingJobData("job","jobDetail1.JobDataMap.Value")
.usingJobData("name","jobDetail1.name.Value") //通过 setName 自动赋值
.build();
Trigger trigger = TriggerBuilder.newTrigger()
.withIdentity("trigger1", "trigger1")
.usingJobData("trigger","trigger.JobDataMap.Value")
.usingJobData("name","trigger.name.Value") //如果 Trigger 有值,会覆盖 JobDetail
.startNow()
.withSchedule(SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(1)
.repeatForever())
.build();
try {
Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
scheduler.scheduleJob(jobDetail,trigger);
scheduler.start();
} catch (SchedulerException ex) {
ex.printStackTrace();
}
}
}
import org.quartz.*;
public class TaskJob implements Job {
private String name;
public void setName(String name) {
this.name = name;
}
@Override
public void execute(JobExecutionContext context) throws JobExecutionException {
System.out.println("name => " + name);
}
}
import cn.hutool.core.date.DateUtil; import org.quartz.*; @DisallowConcurrentExecution public class TaskJob implements Job { @Override public void execute(JobExecutionContext context) { System.out.println("Time => " + DateUtil.now()); try { Thread.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); } } }
@PersistJobDataAfterExecution
Persistente JobDataMap in JobDetail (nicht gültig für Datenzuordnung im Trigger), wenn eine Aufgabe nicht
import cn.hutool.core.date.DateUtil; import org.quartz.*; //持久化JobDetail中的JobDataMap(对 trigger 中的 datamap 无效),如果一个任务不是 @PersistJobDataAfterExecution public class TaskJob implements Job { @Override public void execute(JobExecutionContext context) { JobDataMap triggerMap = context.getJobDetail().getJobDataMap(); triggerMap.put("count", triggerMap.getInt("count") + 1); System.out.println("Time => " + DateUtil.now() + " count =>" + triggerMap.getInt("count")); } }
Client
import org.quartz.*; import org.quartz.impl.StdSchedulerFactory; public class TaskClient { public static void main(String[] args) { JobDetail jobDetail = JobBuilder.newJob(TaskJob.class) .withIdentity("job1", "group1") .usingJobData("job","jobDetail1.JobDataMap.Value") .usingJobData("name","jobDetail1.name.Value") //通过 setName 自动赋值 .usingJobData("count",0) //通过 setName 自动赋值 .build(); Trigger trigger = TriggerBuilder.newTrigger() .withIdentity("trigger1", "trigger1") .usingJobData("trigger","trigger.JobDataMap.Value") .usingJobData("name","trigger.name.Value") //如果 Trigger 有值,会覆盖 JobDetail .startNow() .withSchedule(SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(1) .repeatForever()) .build(); try { Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler(); scheduler.scheduleJob(jobDetail,trigger); scheduler.start(); } catch (SchedulerException ex) { ex.printStackTrace(); } } }
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