Hands-On Software Engineering with Golang

Breaking circular dependencies via implicit interfaces

In the following imaginary scenario, we are working for a start-up company that is building the software that's responsible for controlling fully automated warehouses. Autonomous robots equipped with gripping arms and lasers (what could possibly go wrong?) are busy moving around the warehouse floor locating and picking up order items from the shelves and placing them in cardboard boxes that are then shipped to the customers.

This is a tentative definition for a warehouse Robot:

package warehouse

import "context"

// Robot navigates the warehouse floor and fetches items for packing.
type Robot struct {
    // various fields
}

// AcquireRobot blocks until a Robot becomes available or until ...