Powering Modularization at Airbnb: Plugin Architecture
summary
Airbnb implements a plugin architecture that combines an annotation processor with Dagger multibindings and a Scabbard intermediate generator so modules can contribute to runtime collections without direct dependencies. The system generates boilerplate (via a Ruby scaffolding script), enforces rules as compile errors (module types, allowed dependencies), and surfaces IDE find-usages. Deployed in 2019 after a 2018 vision, it reduces Dagger gotchas, cuts developer setup friction, and scales to hundreds of modules in production.
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chapters (11)
- 0:00Introduction
- 1:56Benefits of modularization
- 3:17Build speed and caching
- 4:00Dependency management challenges
- 5:31Interface polymorphism solution
- 7:22Enabling contributor setup
- 9:11Module type rules and constraints
- 12:01Dagger multi-binding demo
- 13:51Custom annotation processor
- 15:30Unified Dagger system
- 17:41Plugin system use cases
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