Uses of Package
org.quartz

Packages that use org.quartz
org.quartz The main package of Quartz, containing the client-side interfaces. 
org.quartz.core Contains the core classes and interfaces for the Quartz job scheduler. 
org.quartz.core.jmx   
org.quartz.ee.jmx.jboss   
org.quartz.ee.jta   
org.quartz.ee.servlet   
org.quartz.impl Contains implementations of the SchedulerFactory, JobStore, ThreadPool, and other interfaces required by the org.quartz.core.QuartzScheduler. 
org.quartz.impl.calendar   
org.quartz.impl.jdbcjobstore   
org.quartz.impl.jdbcjobstore.oracle   
org.quartz.impl.matchers   
org.quartz.impl.triggers This package contains Trigger implementations that ship with Quartz. 
org.quartz.jobs   
org.quartz.jobs.ee.ejb   
org.quartz.jobs.ee.jms   
org.quartz.jobs.ee.jmx   
org.quartz.jobs.ee.mail   
org.quartz.listeners   
org.quartz.plugins   
org.quartz.plugins.history   
org.quartz.plugins.management   
org.quartz.plugins.xml   
org.quartz.simpl Contains simple / light-weight implementations (with no dependencies on external libraries) of interfaces required by the org.quartz.core.QuartzScheduler. 
org.quartz.spi Contains Service Provider Interfaces that can be implemented by those wishing to create and use custom versions of Quartz back-end/behind-the-scenes services. 
org.quartz.utils   
org.quartz.xml   
org.terracotta.quartz   
org.terracotta.quartz.collections   
org.terracotta.quartz.wrappers   
 

Classes in org.quartz used by org.quartz
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
CalendarIntervalScheduleBuilder
          CalendarIntervalScheduleBuilder is a ScheduleBuilder that defines calendar time (day, week, month, year) interval-based schedules for Triggers.
CalendarIntervalTrigger
          A concrete Trigger that is used to fire a JobDetail based upon repeating calendar time intervals.
CronExpression
          Provides a parser and evaluator for unix-like cron expressions.
CronScheduleBuilder
          CronScheduleBuilder is a ScheduleBuilder that defines CronExpression-based schedules for Triggers.
CronTrigger
          The public interface for inspecting settings specific to a CronTrigger, .
DailyTimeIntervalScheduleBuilder
          A ScheduleBuilder implementation that build schedule for DailyTimeIntervalTrigger.
DailyTimeIntervalTrigger
          A Trigger that is used to fire a JobDetail based upon daily repeating time intervals.
DateBuilder
          DateBuilder is used to conveniently create java.util.Date instances that meet particular criteria.
DateBuilder.IntervalUnit
           
DisallowConcurrentExecution
          An annotation that marks a Job class as one that must not have multiple instances executed concurrently (where instance is based-upon a JobDetail definition - or in other words based upon a JobKey).
Job
           The interface to be implemented by classes which represent a 'job' to be performed.
JobBuilder
          JobBuilder is used to instantiate JobDetails.
JobDataMap
          Holds state information for Job instances.
JobDetail
          Conveys the detail properties of a given Job instance.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
JobKey
          Uniquely identifies a JobDetail.
JobListener
          The interface to be implemented by classes that want to be informed when a JobDetail executes.
JobPersistenceException
          An exception that is thrown to indicate that there has been a failure in the scheduler's underlying persistence mechanism.
ListenerManager
          Client programs may be interested in the 'listener' interfaces that are available from Quartz.
Matcher
          Matchers can be used in various Scheduler API methods to select the entities that should be operated upon.
PersistJobDataAfterExecution
          An annotation that marks a Job class as one that makes updates to its JobDataMap during execution, and wishes the scheduler to re-store the JobDataMap when execution completes.
ScheduleBuilder
           
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerContext
          Holds context/environment data that can be made available to Jobs as they are executed.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
SchedulerListener
          The interface to be implemented by classes that want to be informed of major Scheduler events.
SchedulerMetaData
          Describes the settings and capabilities of a given Scheduler instance.
SimpleScheduleBuilder
          SimpleScheduleBuilder is a ScheduleBuilder that defines strict/literal interval-based schedules for Triggers.
SimpleTrigger
          A Trigger that is used to fire a Job at a given moment in time, and optionally repeated at a specified interval.
TimeOfDay
          Represents a time in hour, minute and second of any given day.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.CompletedExecutionInstruction
          NOOP Instructs the Scheduler that the Trigger has no further instructions.
Trigger.TriggerState
           
TriggerBuilder
          TriggerBuilder is used to instantiate Triggers.
TriggerKey
          Uniquely identifies a Trigger.
TriggerListener
          The interface to be implemented by classes that want to be informed when a Trigger fires.
UnableToInterruptJobException
          An exception that is thrown to indicate that a call to InterruptableJob.interrupt() failed without interrupting the Job.
 

Classes in org.quartz used by org.quartz.core
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
JobDataMap
          Holds state information for Job instances.
JobDetail
          Conveys the detail properties of a given Job instance.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
JobKey
          Uniquely identifies a JobDetail.
JobListener
          The interface to be implemented by classes that want to be informed when a JobDetail executes.
ListenerManager
          Client programs may be interested in the 'listener' interfaces that are available from Quartz.
Matcher
          Matchers can be used in various Scheduler API methods to select the entities that should be operated upon.
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerConfigException
          An exception that is thrown to indicate that there is a misconfiguration of the SchedulerFactory- or one of the components it configures.
SchedulerContext
          Holds context/environment data that can be made available to Jobs as they are executed.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
SchedulerListener
          The interface to be implemented by classes that want to be informed of major Scheduler events.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.CompletedExecutionInstruction
          NOOP Instructs the Scheduler that the Trigger has no further instructions.
Trigger.TriggerState
           
TriggerKey
          Uniquely identifies a Trigger.
TriggerListener
          The interface to be implemented by classes that want to be informed when a Trigger fires.
UnableToInterruptJobException
          An exception that is thrown to indicate that a call to InterruptableJob.interrupt() failed without interrupting the Job.
 

Classes in org.quartz used by org.quartz.core.jmx
CronTrigger
          The public interface for inspecting settings specific to a CronTrigger, .
JobDataMap
          Holds state information for Job instances.
JobDetail
          Conveys the detail properties of a given Job instance.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
SimpleTrigger
          A Trigger that is used to fire a Job at a given moment in time, and optionally repeated at a specified interval.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
 

Classes in org.quartz used by org.quartz.ee.jmx.jboss
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
 

Classes in org.quartz used by org.quartz.ee.jta
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerConfigException
          An exception that is thrown to indicate that there is a misconfiguration of the SchedulerFactory- or one of the components it configures.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
SchedulerListener
          The interface to be implemented by classes that want to be informed of major Scheduler events.
 

Classes in org.quartz used by org.quartz.ee.servlet
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
 

Classes in org.quartz used by org.quartz.impl
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
Job
           The interface to be implemented by classes which represent a 'job' to be performed.
JobBuilder
          JobBuilder is used to instantiate JobDetails.
JobDataMap
          Holds state information for Job instances.
JobDetail
          Conveys the detail properties of a given Job instance.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobKey
          Uniquely identifies a JobDetail.
ListenerManager
          Client programs may be interested in the 'listener' interfaces that are available from Quartz.
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerContext
          Holds context/environment data that can be made available to Jobs as they are executed.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
SchedulerFactory
          Provides a mechanism for obtaining client-usable handles to Scheduler instances.
SchedulerListener
          The interface to be implemented by classes that want to be informed of major Scheduler events.
SchedulerMetaData
          Describes the settings and capabilities of a given Scheduler instance.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.TriggerState
           
TriggerKey
          Uniquely identifies a Trigger.
UnableToInterruptJobException
          An exception that is thrown to indicate that a call to InterruptableJob.interrupt() failed without interrupting the Job.
 

Classes in org.quartz used by org.quartz.impl.calendar
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
CronExpression
          Provides a parser and evaluator for unix-like cron expressions.
 

Classes in org.quartz used by org.quartz.impl.jdbcjobstore
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
JobDataMap
          Holds state information for Job instances.
JobDetail
          Conveys the detail properties of a given Job instance.
JobKey
          Uniquely identifies a JobDetail.
JobPersistenceException
          An exception that is thrown to indicate that there has been a failure in the scheduler's underlying persistence mechanism.
ScheduleBuilder
           
SchedulerConfigException
          An exception that is thrown to indicate that there is a misconfiguration of the SchedulerFactory- or one of the components it configures.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.CompletedExecutionInstruction
          NOOP Instructs the Scheduler that the Trigger has no further instructions.
Trigger.TriggerState
           
TriggerKey
          Uniquely identifies a Trigger.
 

Classes in org.quartz used by org.quartz.impl.jdbcjobstore.oracle
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
JobDetail
          Conveys the detail properties of a given Job instance.
 

Classes in org.quartz used by org.quartz.impl.matchers
JobKey
          Uniquely identifies a JobDetail.
Matcher
          Matchers can be used in various Scheduler API methods to select the entities that should be operated upon.
TriggerKey
          Uniquely identifies a Trigger.
 

Classes in org.quartz used by org.quartz.impl.triggers
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
CalendarIntervalTrigger
          A concrete Trigger that is used to fire a JobDetail based upon repeating calendar time intervals.
CronExpression
          Provides a parser and evaluator for unix-like cron expressions.
CronTrigger
          The public interface for inspecting settings specific to a CronTrigger, .
DailyTimeIntervalTrigger
          A Trigger that is used to fire a JobDetail based upon daily repeating time intervals.
DateBuilder.IntervalUnit
           
JobDataMap
          Holds state information for Job instances.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
JobKey
          Uniquely identifies a JobDetail.
ScheduleBuilder
           
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
SimpleTrigger
          A Trigger that is used to fire a Job at a given moment in time, and optionally repeated at a specified interval.
TimeOfDay
          Represents a time in hour, minute and second of any given day.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.CompletedExecutionInstruction
          NOOP Instructs the Scheduler that the Trigger has no further instructions.
TriggerBuilder
          TriggerBuilder is used to instantiate Triggers.
TriggerKey
          Uniquely identifies a Trigger.
 

Classes in org.quartz used by org.quartz.jobs
DisallowConcurrentExecution
          An annotation that marks a Job class as one that must not have multiple instances executed concurrently (where instance is based-upon a JobDetail definition - or in other words based upon a JobKey).
Job
           The interface to be implemented by classes which represent a 'job' to be performed.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
PersistJobDataAfterExecution
          An annotation that marks a Job class as one that makes updates to its JobDataMap during execution, and wishes the scheduler to re-store the JobDataMap when execution completes.
 

Classes in org.quartz used by org.quartz.jobs.ee.ejb
Job
           The interface to be implemented by classes which represent a 'job' to be performed.
JobDataMap
          Holds state information for Job instances.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
 

Classes in org.quartz used by org.quartz.jobs.ee.jms
Job
           The interface to be implemented by classes which represent a 'job' to be performed.
JobDataMap
          Holds state information for Job instances.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
 

Classes in org.quartz used by org.quartz.jobs.ee.jmx
Job
           The interface to be implemented by classes which represent a 'job' to be performed.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
 

Classes in org.quartz used by org.quartz.jobs.ee.mail
Job
           The interface to be implemented by classes which represent a 'job' to be performed.
JobDataMap
          Holds state information for Job instances.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
 

Classes in org.quartz used by org.quartz.listeners
JobDetail
          Conveys the detail properties of a given Job instance.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
JobKey
          Uniquely identifies a JobDetail.
JobListener
          The interface to be implemented by classes that want to be informed when a JobDetail executes.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
SchedulerListener
          The interface to be implemented by classes that want to be informed of major Scheduler events.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.CompletedExecutionInstruction
          NOOP Instructs the Scheduler that the Trigger has no further instructions.
TriggerKey
          Uniquely identifies a Trigger.
TriggerListener
          The interface to be implemented by classes that want to be informed when a Trigger fires.
 

Classes in org.quartz used by org.quartz.plugins
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
 

Classes in org.quartz used by org.quartz.plugins.history
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
JobListener
          The interface to be implemented by classes that want to be informed when a JobDetail executes.
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.CompletedExecutionInstruction
          NOOP Instructs the Scheduler that the Trigger has no further instructions.
TriggerListener
          The interface to be implemented by classes that want to be informed when a Trigger fires.
 

Classes in org.quartz used by org.quartz.plugins.management
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
 

Classes in org.quartz used by org.quartz.plugins.xml
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
 

Classes in org.quartz used by org.quartz.simpl
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
Job
           The interface to be implemented by classes which represent a 'job' to be performed.
JobDataMap
          Holds state information for Job instances.
JobDetail
          Conveys the detail properties of a given Job instance.
JobKey
          Uniquely identifies a JobDetail.
JobPersistenceException
          An exception that is thrown to indicate that there has been a failure in the scheduler's underlying persistence mechanism.
ObjectAlreadyExistsException
          An exception that is thrown to indicate that an attempt to store a new object (i.e.
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerConfigException
          An exception that is thrown to indicate that there is a misconfiguration of the SchedulerFactory- or one of the components it configures.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.CompletedExecutionInstruction
          NOOP Instructs the Scheduler that the Trigger has no further instructions.
Trigger.TriggerState
           
TriggerKey
          Uniquely identifies a Trigger.
 

Classes in org.quartz used by org.quartz.spi
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
Job
           The interface to be implemented by classes which represent a 'job' to be performed.
JobDataMap
          Holds state information for Job instances.
JobDetail
          Conveys the detail properties of a given Job instance.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
JobKey
          Uniquely identifies a JobDetail.
JobPersistenceException
          An exception that is thrown to indicate that there has been a failure in the scheduler's underlying persistence mechanism.
ObjectAlreadyExistsException
          An exception that is thrown to indicate that an attempt to store a new object (i.e.
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerConfigException
          An exception that is thrown to indicate that there is a misconfiguration of the SchedulerFactory- or one of the components it configures.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.CompletedExecutionInstruction
          NOOP Instructs the Scheduler that the Trigger has no further instructions.
Trigger.TriggerState
           
TriggerKey
          Uniquely identifies a Trigger.
 

Classes in org.quartz used by org.quartz.utils
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
 

Classes in org.quartz used by org.quartz.xml
JobDetail
          Conveys the detail properties of a given Job instance.
JobKey
          Uniquely identifies a JobDetail.
Scheduler
          This is the main interface of a Quartz Scheduler.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
TriggerKey
          Uniquely identifies a Trigger.
 

Classes in org.quartz used by org.terracotta.quartz
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
JobDetail
          Conveys the detail properties of a given Job instance.
JobExecutionContext
          A context bundle containing handles to various environment information, that is given to a JobDetail instance as it is executed, and to a Trigger instance after the execution completes.
JobExecutionException
          An exception that can be thrown by a Job to indicate to the Quartz Scheduler that an error occurred while executing, and whether or not the Job requests to be re-fired immediately (using the same JobExecutionContext, or whether it wants to be unscheduled.
JobKey
          Uniquely identifies a JobDetail.
JobListener
          The interface to be implemented by classes that want to be informed when a JobDetail executes.
JobPersistenceException
          An exception that is thrown to indicate that there has been a failure in the scheduler's underlying persistence mechanism.
ObjectAlreadyExistsException
          An exception that is thrown to indicate that an attempt to store a new object (i.e.
SchedulerConfigException
          An exception that is thrown to indicate that there is a misconfiguration of the SchedulerFactory- or one of the components it configures.
SchedulerException
          Base class for exceptions thrown by the Quartz Scheduler.
Trigger
          The base interface with properties common to all Triggers - use TriggerBuilder to instantiate an actual Trigger.
Trigger.CompletedExecutionInstruction
          NOOP Instructs the Scheduler that the Trigger has no further instructions.
Trigger.TriggerState
           
TriggerKey
          Uniquely identifies a Trigger.
 

Classes in org.quartz used by org.terracotta.quartz.collections
JobKey
          Uniquely identifies a JobDetail.
TriggerKey
          Uniquely identifies a Trigger.
 

Classes in org.quartz used by org.terracotta.quartz.wrappers
Calendar
          An interface to be implemented by objects that define spaces of time during which an associated Trigger may (not) fire.
JobDataMap
          Holds state information for Job instances.
JobDetail
          Conveys the detail properties of a given Job instance.
JobKey
          Uniquely identifies a JobDetail.
TriggerKey
          Uniquely identifies a Trigger.
 



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