Decision notification listener in Optimizely Feature Experimentation

The decision notification listener is triggered by the decide methods. It is most commonly used to send decisions to an analytics provider or to an internal data warehouse to join it with other data that you have about your users.

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Note
If you only want decisions that resulted in impressions in the Optimizely app, you can filter on the dispatched decision event field of the returned OptimizelyDecision object in your code.

To track flag usage, complete the following:

Sign up for an analytics provider of your choice (for example, Segment).
Configure a decision notification listener.
Follow your analytics provider's documentation and send events from within the decision listener callback.

Steps 1 and 3 are not covered in this documentation.

Parameters

The following table shows the information provided to the listener when it is triggered:

Field	Type	Description
type	string	Decision type varies depending on which method triggers the listener. The decide methods set the type to `flag`.
decision info	map	Key-value map that consists of data corresponding to the decision. See decision-info parameter.
user ID	string	The user ID.
attributes	map	A map of custom key-value string pairs specifying attributes for the user that are used for audience targeting. Non-string values are only supported in SDK versions 3.0 and above (released after March 2019) for most SDKs. See SDK compatability matrix.

`decision info` parameter

The following table shows the decision info parameter of the decision notification listener:

Decision info parameter	Description
flag key	The flag key.
enabled	Boolean value for whether the flag is enabled or not.
variables	The same object as returned by `my_decision.variables`.
variation key	The key of the flag variation.
rule key	The key of the flag rule.
decision event dispatched	A Boolean value indicating if the decision dispatched a decision event to `logx.optimizely.com`. In the Optimizely app, an impression on the Experimentation Results page corresponds to a dispatched decision event.
experiment ID	Experiment assignment ID.
variation ID	Variation assignment ID.

Examples

For code examples, see the following SDK documentation on notification listeners:

Android SDK
C# SDK
Flutter SDK
Go SDK
Java SDK
JavaScript SDK – SDK versions 6.0.0 and later.
JavaScript (Browser) SDK – SDK versions 5.3.5 and earlier.
JavaScript (Node) SDK – SDK versions 5.3.5 and earlier.
PHP SDK
React SDK
React Native SDK
Ruby SDK
Python SDK
Swift SDK