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Clarified that CronTrigger never schedules overlapping executions 

Issue: SPR-10556
This commit is contained in:
Juergen Hoeller 2013-05-14 21:16:04 +02:00
parent 278a5924cb
commit 5dbbd8fe72
1 changed files with 9 additions and 3 deletions
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12
spring-context/src/main/java/org/springframework/scheduling/support/CronTrigger.java
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@ -16,12 +16,12 @@
package org.springframework.scheduling.support; package org.springframework.scheduling.support;
import org.springframework.scheduling.Trigger;
import org.springframework.scheduling.TriggerContext;
import java.util.Date; import java.util.Date;
import java.util.TimeZone; import java.util.TimeZone;
import org.springframework.scheduling.Trigger;
import org.springframework.scheduling.TriggerContext;
/** /**
* {@link Trigger} implementation for cron expressions. * {@link Trigger} implementation for cron expressions.
* Wraps a {@link CronSequenceGenerator}. * Wraps a {@link CronSequenceGenerator}.
@ -55,6 +55,12 @@ public class CronTrigger implements Trigger {
} }
/**
* Determine the next execution time according to the given trigger context.
* <p>Next execution times are calculated based on the
* {@linkplain TriggerContext#lastCompletionTime completion time} of the
* previous execution; therefore, overlapping executions won't occur.
*/
@Override @Override
public Date nextExecutionTime(TriggerContext triggerContext) { public Date nextExecutionTime(TriggerContext triggerContext) {
Date date = triggerContext.lastCompletionTime(); Date date = triggerContext.lastCompletionTime();