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/*
 * All content copyright Terracotta, Inc., unless otherwise indicated. All rights reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 
 * use this file except in compliance with the License. You may obtain a copy 
 * of the License at 
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0 
 *   
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 
 * License for the specific language governing permissions and limitations 
 * under the License.
 * 
 */

package org.quartz;

import java.util.Calendar;
import java.util.TimeZone;

/**
 * The public interface for inspecting settings specific to a CronTrigger, . which is used to fire a {@link 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 {@link 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.
  • *
*

* * @see CronScheduleBuilder * @see TriggerBuilder * @author jhouse * @author Contributions from Mads Henderson */ public interface CronTrigger extends Trigger { public static final long serialVersionUID = -8644953146451592766L; /** *

* Instructs the {@link Scheduler} that upon a mis-fire situation, the {@link CronTrigger} wants to be fired now by Scheduler. *

*/ public static final int MISFIRE_INSTRUCTION_FIRE_ONCE_NOW = 1; /** *

* Instructs the {@link Scheduler} that upon a mis-fire situation, the {@link 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 {@link Calendar}, but it does not want to be fired now. *

*/ public static final int MISFIRE_INSTRUCTION_DO_NOTHING = 2; public String getCronExpression(); /** *

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

*/ public TimeZone getTimeZone(); public String getExpressionSummary(); TriggerBuilder getTriggerBuilder(); }




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