Callback that is provided by the application to provide a custom variable.
Public Method Summary
| abstract String | 
                 
                  
                  getValue(Map<String, Object>
                  parameters)
                   
              
                    getValue(Map) is given a map of named parameters (the map may
                    contain String, Double, Boolean, Map, or List values).
                   | 
            
Public Methods
public abstract String getValue (Map<String, Object> parameters)
            getValue(Map) is given a map of named parameters (the map may contain
            String, Double, Boolean, Map, or List values). It should return a String which is the
            calculated value of the variable.
This function will be called from a background thread during event processing. The container will cache one instance of this object and reuse it.
Returns
- the value of the custom variable requested