AlarmEvaluator

All Superinterfaces:

BrowsableNode, Diagnosable, Node
```
public interface AlarmEvaluator
extends Diagnosable, BrowsableNode
```
The alarm evaluator is the unit that takes a value, and determines whether it is in alarm or not. It is created by the AlarmManager based on an AlarmConfiguration. When the entity that is feeding it values is destroyed, it should call release() so that the alarming system knows that the alarm is no longer in use.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`evaluate(QualifiedValue value)`	Evaluates a value against the configured conditions.
`AlarmStateSummary`	`getState()`
`boolean`	`isEvaluationEnabled()`	Indicates whether this AlarmEvaluator is enabled.
`void`	`reattach()`	Re-activates the alarm after release() has been called.
`void`	`release()`	Releases the alarm evaluator, deregistering the alarm configuration from the system.
`void`	`setAlarmObserver(AlarmObserver value)`	Each alarm can have one observer, that will be notified about transitions.Note: The observer is cleared when release() is called, and therefore should be re-added when calling reattach();
`void`	`setEvaluationEnabled(boolean value)`	Sets whether or not the alarm should evaluate.

Methods inherited from interface com.inductiveautomation.ignition.gateway.tags.evaluation.nodes.BrowsableNode
browse, browse, browse, browse, getBrowseInfo, getChildNode, getPropertyNode, hasChildren

Methods inherited from interface com.inductiveautomation.ignition.common.Diagnosable
sampleDiagnostics

Methods inherited from interface com.inductiveautomation.ignition.gateway.tags.evaluation.nodes.Node
read, setLeased, setSubscription, write

- Method Detail
  - getState
```
AlarmStateSummary getState()
```
  - evaluate
```
void evaluate(QualifiedValue value)
```
    Evaluates a value against the configured conditions.
  - release
```
void release()
```
    Releases the alarm evaluator, deregistering the alarm configuration from the system.
  - reattach
```
void reattach()
```
    Re-activates the alarm after release() has been called. If an alarm observer is being used, it should be re-added before calling this function.
  - setEvaluationEnabled
```
void setEvaluationEnabled(boolean value)
```
    Sets whether or not the alarm should evaluate. This is treated separately from the alarm's enabled property. In other words, in order to evaluate, this evaluator must be enabled, and the alarm must indicate that it is enabled through the property.
    Note: When this is set to false, all live events will transition to "finished".
  - isEvaluationEnabled
```
boolean isEvaluationEnabled()
```
    Indicates whether this AlarmEvaluator is enabled. The alarm itself, through its Enabled property, must still not be enabled.
  - setAlarmObserver
```
void setAlarmObserver(AlarmObserver value)
```
    Each alarm can have one observer, that will be notified about transitions.Note: The observer is cleared when release() is called, and therefore should be re-added when calling reattach();