org.springframework.scheduling.support

Class CronTrigger

java.lang.Object

org.springframework.scheduling.support.CronTrigger

All Implemented Interfaces:

Trigger

public class CronTrigger
extends Object
implements Trigger

Trigger implementation for cron expressions. Wraps a CronSequenceGenerator.

Since:

3.0

Author:

Juergen Hoeller

See Also:

CronSequenceGenerator

Constructor Summary

Constructors

Constructor and Description
CronTrigger(String cronExpression) Build a CronTrigger from the pattern provided in the default time zone.
CronTrigger(String cronExpression, TimeZone timeZone) Build a CronTrigger from the pattern provided.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
String	getExpression()
int	hashCode()
Date	nextExecutionTime(TriggerContext triggerContext) Determine the next execution time according to the given trigger context.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

CronTrigger

public CronTrigger(String cronExpression)

Build a CronTrigger from the pattern provided in the default time zone.

Parameters:

cronExpression - a space-separated list of time fields, following cron expression conventions

CronTrigger

public CronTrigger(String cronExpression,
                   TimeZone timeZone)

Build a CronTrigger from the pattern provided.

Parameters:

cronExpression - a space-separated list of time fields, following cron expression conventions

timeZone - a time zone in which the trigger times will be generated

Method Detail

nextExecutionTime

public Date nextExecutionTime(TriggerContext triggerContext)

Determine the next execution time according to the given trigger context.

Next execution times are calculated based on the completion time of the previous execution; therefore, overlapping executions won't occur.

Specified by:

nextExecutionTime in interface Trigger

Parameters:

triggerContext - context object encapsulating last execution times and last completion time

Returns:

the next execution time as defined by the trigger, or null if the trigger won't fire anymore

getExpression

public String getExpression()

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object