Powering Modularization at Airbnb: Plugin Architecture

Modularization is a key component of Airbnb's success. It helps the team increase code ownership and reduce build times. These benefits come with increased complexity and boilerplate. Our Plugin architecture uses an annotation processor and Dagger's multibindings to lower costs and gain additional benefits. These include: a single source for truth for a plugin/plugin points; abstracting away Dagger getchas; adding our compile-time enforcements and getting additional value from the IDE (e.g. finding usages of all plugins that contribute to a particular plugin point). The architecture was introduced by Airbnb in their 2018 vision, and it has been implemented this year. Adell Hanson Kahn will discuss the benefits and the workings of the tooling in this talk.