Expression

Use Javascript expressions to define custom filters

Objective

Enable developers the flexibility to define filtering logic using Javascript.

This is ideal when there is a need to fine tune the filtering process to the needs of the use case.

Example

This will provide all IBM events to the next processors.

Top level StreamEvent attributes are not available within the scripting processing context.

filter:
  expression: "(typeof symbol !== 'undefined' && symbol === 'IBM') ? true : false;"

Attributes schema

Attributes	Description	Data Type	Required
expression	A valid Javascript expression that returns a boolean value	String