OpenFeature: What is the Evaluation API?

Описание: As an application author the OpenFeature Evaluation API is the piece of OpenFeature you'll be primarily working with. It is the way your application will retrieve flag values from the flag backend system.

First, you need to include the OpenFeature SDK in your code. Then, set the Provider you wish to use, if you don't yet know about Providers, we have another video on that topic here:    • OpenFeature: What is a Provider?  

Next, create a client. You can create a single client for the entire application, create multiple clients per logical piece of your application, or even dynamically create a client per http request.

Now that you have an OpenFeature client, you can begin retrieving flag values from your Provider.

OpenFeature offers both basic and detailed options when retrieving flag values. Basic returns the flag value only. Detailed evaluation returns the flag value, plus additional metadata fields, such as the "reason" field, which explains why a particular flag value was returned, variant, and error codes.

The OpenFeature Evaluation API is standard across Providers. This means you don't have to alter your evaluation code if you change feature flag backend systems, just swap the Provider.

Learn more and get started today with OpenFeature at https://openfeature.dev or on GitHub at https://github.com/open-feature