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Feature Flags

Recommendation
Updated
Moved
TRIAL
2022-04-27

What is it

It is a technique to allow a team to modify system behaviour without changing code. A naive implementation could like this:

if (isFeatureAToggled) {
enableFeatureA()
}

Why we use it

Einride is currently not utilizing feature flagging in Saga. However, it is something that should be used and assessment of libraries/tooling to help implementation is encouraged.

When to use it

It should be used to release new features in a controlled manner, toggle functionality for specific users and for experimental features (A/B testing).

How to learn it

Read a blog post on Feature Toggles by Martin Fowler to understand the theory behind them.