org.quartz.triggers

Interface CronTrigger

All Superinterfaces:

Cloneable, Comparable<Trigger>, Serializable, Trigger

All Known Implementing Classes:

CronTriggerImpl

public interface CronTrigger
extends Trigger

The public interface for inspecting settings specific to a CronTrigger, . which is used to fire a org.quartz.Job at given moments in time, defined with Unix 'cron-like' schedule definitions.

For those unfamiliar with "cron", this means being able to create a firing schedule such as: "At 8:00am every Monday through Friday" or "At 1:30am every last Friday of the month".

The format of a "Cron-Expression" string is documented on the org.quartz.CronExpression class.

Here are some full examples:

Expression		Meaning
"0 0 12 * * ?"		Fire at 12pm (noon) every day
"0 15 10 ? * *"		Fire at 10:15am every day
"0 15 10 * * ?"		Fire at 10:15am every day
"0 15 10 * * ? *"		Fire at 10:15am every day
"0 15 10 * * ? 2005"		Fire at 10:15am every day during the year 2005
"0 * 14 * * ?"		Fire every minute starting at 2pm and ending at 2:59pm, every day
"0 0/5 14 * * ?"		Fire every 5 minutes starting at 2pm and ending at 2:55pm, every day
"0 0/5 14,18 * * ?"		Fire every 5 minutes starting at 2pm and ending at 2:55pm, AND fire every 5 minutes starting at 6pm and ending at 6:55pm, every day
"0 0-5 14 * * ?"		Fire every minute starting at 2pm and ending at 2:05pm, every day
"0 10,44 14 ? 3 WED"		Fire at 2:10pm and at 2:44pm every Wednesday in the month of March.
"0 15 10 ? * MON-FRI"		Fire at 10:15am every Monday, Tuesday, Wednesday, Thursday and Friday
"0 15 10 15 * ?"		Fire at 10:15am on the 15th day of every month
"0 15 10 L * ?"		Fire at 10:15am on the last day of every month
"0 15 10 ? * 6L"		Fire at 10:15am on the last Friday of every month
"0 15 10 ? * 6L"		Fire at 10:15am on the last Friday of every month
"0 15 10 ? * 6L 2002-2005"		Fire at 10:15am on every last Friday of every month during the years 2002, 2003, 2004 and 2005
"0 15 10 ? * 6#3"		Fire at 10:15am on the third Friday of every month

Pay attention to the effects of '?' and '*' in the day-of-week and day-of-month fields!

NOTES:

• Support for specifying both a day-of-week and a day-of-month value is not complete (you'll need to use the '?' character in on of these fields).
• Be careful when setting fire times between mid-night and 1:00 AM - "daylight savings" can cause a skip or a repeat depending on whether the time moves back or jumps forward.

Author:

jhouse, Contributions from Mads Henderson

Nested Class Summary

Nested classes/interfaces inherited from interface org.quartz.triggers.Trigger

Trigger.CompletedExecutionInstruction, Trigger.TriggerTimeComparator

Field Summary

Fields

Modifier and Type	Field and Description
static int	MISFIRE_INSTRUCTION_DO_NOTHING Instructs the Scheduler that upon a mis-fire situation, the CronTrigger wants to have it's next-fire-time updated to the next time in the schedule after the current time (taking into account any associated Calendar, but it does not want to be fired now.
static int	MISFIRE_INSTRUCTION_FIRE_ONCE_NOW Instructs the Scheduler that upon a mis-fire situation, the CronTrigger wants to be fired now by Scheduler.
static long	serialVersionUID

Fields inherited from interface org.quartz.triggers.Trigger

DEFAULT_PRIORITY, MISFIRE_INSTRUCTION_IGNORE_MISFIRE_POLICY, MISFIRE_INSTRUCTION_SMART_POLICY

Method Summary

Modifier and Type	Method and Description
String	getCronExpression()
String	getExpressionSummary()
TimeZone	getTimeZone() Returns the time zone for which the cronExpression of this CronTrigger will be resolved.

Methods inherited from interface org.quartz.triggers.Trigger

equals, getCalendarName, getDescription, getEndTime, getFinalFireTime, getFireTimeAfter, getJobDataMap, getJobName, getMisfireInstruction, getName, getNextFireTime, getPreviousFireTime, getPriority, getStartTime, mayFireAgain

Methods inherited from interface java.lang.Comparable

compareTo

Field Detail

serialVersionUID

static final long serialVersionUID

See Also:

Constant Field Values

MISFIRE_INSTRUCTION_FIRE_ONCE_NOW

static final int MISFIRE_INSTRUCTION_FIRE_ONCE_NOW

Instructs the Scheduler that upon a mis-fire situation, the CronTrigger wants to be fired now by Scheduler.

See Also:

Constant Field Values

MISFIRE_INSTRUCTION_DO_NOTHING

static final int MISFIRE_INSTRUCTION_DO_NOTHING

Instructs the Scheduler that upon a mis-fire situation, the CronTrigger wants to have it's next-fire-time updated to the next time in the schedule after the current time (taking into account any associated Calendar, but it does not want to be fired now.

See Also:

Constant Field Values

Method Detail

getCronExpression

String getCronExpression()

getTimeZone

TimeZone getTimeZone()

Returns the time zone for which the cronExpression of this CronTrigger will be resolved.

getExpressionSummary

String getExpressionSummary()