ProcessVariableChangedEvent (KIE :: Public API 8.44.0.Final API)

All Superinterfaces:

KieRuntimeEvent, ProcessEvent
```
public interface ProcessVariableChangedEvent
extends ProcessEvent
```
An event when a variable inside a process instance has been changed.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.lang.Object`	`getNewValue()`	The new value of the variable.
`java.lang.Object`	`getOldValue()`	The old value of the variable.
`java.util.List<java.lang.String>`	`getTags()`	List of tags associated with variable that is being changed.
`java.lang.String`	`getVariableId()`	The unique id of the process variable (definition).
`java.lang.String`	`getVariableInstanceId()`	The unique id of the process variable instance (as multiple node instances with the same process variable definition exists).
`boolean`	`hasTag(java.lang.String tag)`	Determines if variable that is being changed has given tag associated with it

Methods inherited from interface org.kie.api.event.KieRuntimeEvent
getKieRuntime

Methods inherited from interface org.kie.api.event.process.ProcessEvent
getEventDate, getEventIdentity, getProcessInstance

- Method Detail
  - getVariableId
```
java.lang.String getVariableId()
```
    The unique id of the process variable (definition).
    
    Returns:
    
    the variable id
  - getVariableInstanceId
```
java.lang.String getVariableInstanceId()
```
    The unique id of the process variable instance (as multiple node instances with the same process variable definition exists). This is an aggregation of the unique id of the instance that contains the variable scope and the variable id.
    
    Returns:
    
    the variable instance id
  - getOldValue
```
java.lang.Object getOldValue()
```
    The old value of the variable. This may be null.
    
    Returns:
    
    the old value
  - getNewValue
```
java.lang.Object getNewValue()
```
    The new value of the variable. This may be null.
    
    Returns:
    
    the new value
  - getTags
```
java.util.List<java.lang.String> getTags()
```
    List of tags associated with variable that is being changed.
    
    Returns:
    
    list of tags if there are any otherwise empty list
  - hasTag
```
boolean hasTag(java.lang.String tag)
```
    Determines if variable that is being changed has given tag associated with it
    
    Parameters:
    
    tag - name of the tag
    
    Returns:
    
    returns true if given tag is associated with variable otherwise false