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@Scheduled supports "-" as cron expression value for disabled triggers

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Issue: SPR-16858
This commit is contained in:
Juergen Hoeller
2018-08-09 16:12:05 +02:00
parent eddbf13d5d
commit 3a5def047f
3 changed files with 94 additions and 34 deletions
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20
spring-context/src/main/java/org/springframework/scheduling/annotation/Scheduled.java
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@@ -41,6 +41,7 @@ import java.lang.annotation.Target;
* <em>composed annotations</em> with attribute overrides.
*
* @author Mark Fisher
* @author Juergen Hoeller
* @author Dave Syer
* @author Chris Beams
* @since 3.0
@@ -55,10 +56,21 @@ import java.lang.annotation.Target;
public @interface Scheduled {
/**
* A cron-like expression, extending the usual UN*X definition to include
* triggers on the second as well as minute, hour, day of month, month
* and day of week. e.g. {@code "0 * * * * MON-FRI"} means once per minute on
* weekdays (at the top of the minute - the 0th second).
* A special cron expression value that indicates a disabled trigger: {@value}.
* <p>This is primarily meant for use with ${...} placeholders, allowing for
* external disabling of corresponding scheduled methods.
* @since 5.1
*/
String CRON_DISABLED = "-";
/**
* A cron-like expression, extending the usual UN*X definition to include triggers
* on the second as well as minute, hour, day of month, month and day of week.
* <p>E.g. {@code "0 * * * * MON-FRI"} means once per minute on weekdays
* (at the top of the minute - the 0th second).
* <p>The special value {@link #CRON_DISABLED "-"} indicates a disabled cron trigger,
* primarily meant for externally specified values resolved by a ${...} placeholder.
* @return an expression that can be parsed to a cron schedule
* @see org.springframework.scheduling.support.CronSequenceGenerator
*/

26
spring-context/src/main/java/org/springframework/scheduling/annotation/ScheduledAnnotationBeanPostProcessor.java
View File

@@ -105,7 +105,7 @@ public class ScheduledAnnotationBeanPostProcessor
SmartInitializingSingleton, ApplicationListener<ContextRefreshedEvent>, DisposableBean {
/**
* The default name of the {@link TaskScheduler} bean to pick up: "taskScheduler".
* The default name of the {@link TaskScheduler} bean to pick up: {@value}.
* <p>Note that the initial lookup happens by type; this is just the fallback
* in case of multiple scheduler beans found in the context.
* @since 4.2
@@ -405,14 +405,16 @@ public class ScheduledAnnotationBeanPostProcessor
if (StringUtils.hasLength(cron)) {
Assert.isTrue(initialDelay == -1, "'initialDelay' not supported for cron triggers");
processedSchedule = true;
TimeZone timeZone;
if (StringUtils.hasText(zone)) {
timeZone = StringUtils.parseTimeZoneString(zone);
if (!Scheduled.CRON_DISABLED.equals(cron)) {
TimeZone timeZone;
if (StringUtils.hasText(zone)) {
timeZone = StringUtils.parseTimeZoneString(zone);
}
else {
timeZone = TimeZone.getDefault();
}
tasks.add(this.registrar.scheduleCronTask(new CronTask(runnable, new CronTrigger(cron, timeZone))));
}
else {
timeZone = TimeZone.getDefault();
}
tasks.add(this.registrar.scheduleCronTask(new CronTask(runnable, new CronTrigger(cron, timeZone))));
}
}
@@ -478,12 +480,8 @@ public class ScheduledAnnotationBeanPostProcessor
// Finally register the scheduled tasks
synchronized (this.scheduledTasks) {
Set<ScheduledTask> registeredTasks = this.scheduledTasks.get(bean);
if (registeredTasks == null) {
registeredTasks = new LinkedHashSet<>(4);
this.scheduledTasks.put(bean, registeredTasks);
}
registeredTasks.addAll(tasks);
Set<ScheduledTask> regTasks = this.scheduledTasks.computeIfAbsent(bean, key -> new LinkedHashSet<>(4));
regTasks.addAll(tasks);
}
}
catch (IllegalArgumentException ex) {