Go Design Patterns

Future design pattern

The Future design pattern (also called Promise) is a quick and easy way to achieve concurrent structures for asynchronous programming. We will take advantage of first class functions in Go to develop Futures.

Description

In short, we will define each possible behavior of an action before executing them in different Goroutines. Node.js uses this approach, providing event-driven programming by default. The idea here is to achieve a fire-and-forget that handles all possible results in an action.

To understand it better, we can talk about a type that has embedded the behavior in case an execution goes well or in case it fails.