Trigger (Drools :: Core 8.34.0.Final API)

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

CompositeMaxDurationTrigger, CronTrigger, IntervalTrigger, PointInTimeTrigger
```
public interface Trigger
extends java.io.Serializable
```
A trigger interface for scheduling jobs

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`java.util.Date`	`hasNextFireTime()`	This method is used to query the trigger about the existence of a possible next fire time, but WITHOUT changing any internal state of the trigger.
`default void`	`initialize(ReteEvaluator reteEvaluator)`	this method will be called before any job being called to provide some context to trigger
`java.util.Date`	`nextFireTime()`	This method returns the date of the next fire time and updates the internal state of the Trigger to the following fire time if one exists.

- Method Detail
  - initialize
```
default void initialize(ReteEvaluator reteEvaluator)
```
    this method will be called before any job being called to provide some context to trigger
    
    Parameters:
    
    reteEvaluator -
  - hasNextFireTime
```
java.util.Date hasNextFireTime()
```
    This method is used to query the trigger about the existence of a possible next fire time, but WITHOUT changing any internal state of the trigger. In other words, this method MUST not have side effects. As an analogy, if a trigger was a stack, this method would be the equivalent of a "peek()" call.
    
    Returns:
    
    the Date of the next fire time or null if there is no next fire time.
  - nextFireTime
```
java.util.Date nextFireTime()
```
    This method returns the date of the next fire time and updates the internal state of the Trigger to the following fire time if one exists. As an analogy, if a trigger was a stack, this method would be the equivalent of a "pop()" call.
    
    Returns:
    
    the Date of the next fire time or null if there is no next fire time.