PAUG - Modularization : pitfalls & best practices

Liens utiles :

- NowInAndroid : https://github.com/android/nowinandroid

- Gradle Configuration Cache : https://docs.gradle.org/current/userguide/configuration_cache.html

- Plugin Module Graph Assert : https://github.com/jraska/modules-graph-assert

- Slack Gradle Plugin : https://github.com/slackhq/slack-gradle-plugin

- Slides du talk DroidCon sur la Modularization : https://speakerdeck.com/siggijons/modularization-siggi-jonsson

- Gradle Enterprise : https://gradle.com/

- Vidéo Hilt Under the Hood : https://www.youtube.com/watch?v=VOvwAKTRJk8

Transcript

1. Modularization: Pitfalls & Best Practices Eliott Lujan
2. The Monolith
3. The Monolith • Hard to organize
4. The Monolith • Hard to organize • Hard to comprehend
5. The Monolith • Hard to organize • Hard to comprehend • Spaghetti code, everything is accessible
6. The Monolith • Hard to organize • Hard to comprehend • Spaghetti code, everything is accessible • Maintainability & Testability
7. The Monolith • Hard to organize • Hard to comprehend • Spaghetti code, everything is accessible • Maintainability & Testability • No clear boundaries / ownership
8. The Monolith • Hard to organize • Hard to comprehend • Spaghetti code, everything is accessible • Maintainability & Testability • No clear boundaries / ownership • Git conflicts
9. The Monolith • Hard to organize • Hard to comprehend • Spaghetti code, everything is accessible • Maintainability & Testability • No clear boundaries / ownership • Git conflicts • Longer build times
10. Modularized Architecture
11. Modularization • Parallel builds
12. :app :feature :feature
13. :app :feature :feature
14. :app :feature :feature
15. Modularization • Parallel builds • Compilation avoidance
16. :app :feature :feature
17. :app :feature :feature
18. :app :feature :feature
19. :app :feature :feature
20. Modularization • Parallel builds • Compilation avoidance • Clear boundaries, ownership and relations
21. Modularization • Parallel builds • Compilation avoidance • Clear boundaries, ownership and relations • Opportunities
22. :app :presentation :domain :data
23. :app :feature1 :feature2 :feature3
24. :app :presentation :presentation :domain :data :domain :data
25. :app :presentation :presentation :domain :data
26. :app :presentation :presentation :domain :data
27. :feature :core-model :core-ui :core-data :app
28. Are we good so far?
29. Let’s study some pitfalls
30. Pitfall n°1 Manually create every module
31. Script Template Module Type Name Owner Type Name Owner By Simon Marquis
32. Demo Time
33. Pitfall n°2
34. settings.gradle.kts
35. Pitfall n°3
36. Type-safe Project Accessor
37. Type-safe Project Accessor
38. Gradle Version Catalog
39. Gradle Version Catalog
40. libs.version.toml Gradle Version Catalog
41. Pitfall n°4 Configuration time
42. Configuration Tasks
43. Configuration Tasks Execution APK AAB AAR JAR
44. Configuration caching https://docs.gradle.org/current/userguide/configuration_cache.html
45. Configuration Tasks Execution APK AAB AAR JAR
46. Pitfall n°5
48. https://github.com/jraska/modules-graph-assert app.gradle.kts
49. Pitfall n°6 “Bad” modules
50. :navigation :common :util :core
51. :navigation :common :util :core
52. :navigation :common :util :core
54. :feature :navigation :feature :feature :feature :feature
55. :feature :navigation :feature :feature :feature :feature
56. :feature :navigation :feature :feature :feature :feature
60. “Good” Modules “Bad” Modules
61. https://github.com/slackhq/slack-gradle-plugin ModuleStats
62. https://speakerdeck.com/siggijons/modularization-siggi-jonsson
63. Pitfall n°7 Critical path
64. :app :feature :navigation :core :utils
65. :app :feature :navigation :core :utils
66. :app :feature :navigation :core :utils
67. :app :feature :navigation :core :utils
68. :app :feature :navigation :core :utils
69. :app :feature :navigation :core :utils
70. :app :feature :navigation :core :utils
71. :app :feature :navigation :core :utils
72. https://gradle.com/enterprise/releases/2021.2/#identify-the-task-critical-path-of-gradle-builds
73. :app :feature :navigation :core :utils
74. :app :feature :navigation :core :utils
75. :app :feature :navigation :core :utils
76. :app :feature :navigation :core :utils
77. :app :feature :navigation :core :utils
78. :app :feature :navigation :core :utils
79. :app :feature :navigation :core :utils
80. https://github.com/jraska/modules-graph-assert app.gradle.kts
81. https://github.com/jraska/modules-graph-assert ./gradlew generateModuleGraphStatistics longestPath = :app -> :feature -> :navigation -> :core -> :utils
82. ./gradlew generateModulesGraphvizText :app :feature :navigation :core :utils https://github.com/jraska/modules-graph-assert
83. Pitfall n°8 Build time over time https://gradle.com
84. Sample Apps
85. Sample Apps aka Demo Apps or Dev Apps A small app designed to run a single feature
86. :app :presentation :domain :data :presentation :domain :data :presentation :domain :data :presentation :domain :data
87. :app :presentation :domain :data :presentation :domain :data :presentation :domain :data :presentation :domain :data :sampleApp
90. Sample Apps Compile time (3m → 20sec)
91. Sample Apps Compile time (3m → 20sec) Better Developer Experience
92. Sample Apps Compile time (3m → 20sec) Better Developer Experience Configurable Launcher
97. :mainApp :feature https://youtu.be/VOvwAKTRJk8 @HiltAndroidApp implementation
98. :mainApp :feature @InstallIn https://youtu.be/VOvwAKTRJk8 @HiltAndroidApp implementation
99. :mainApp :feature implementation @InstallIn https://youtu.be/VOvwAKTRJk8 @HiltAndroidApp :sampleApp @HiltAndroidApp
100. :mainApp :feature implementation @InstallIn https://youtu.be/VOvwAKTRJk8 @HiltAndroidApp :sampleApp @HiltAndroidApp
105. :app :presentation :domain :data :presentation :domain :data :presentation :domain :data :presentation :domain :data :sampleApp
106. https://developer.android.com/guide/topics/manifest/manifest-element.html
107. https://developer.android.com/guide/topics/manifest/manifest-element.html @Deprecated
109. Configurable launcher • Not part of the Main App
110. Configurable launcher • Not part of the Main App • Test multiple scenarios
111. Configurable launcher • Not part of the Main App • Test multiple scenarios • Quickly access your screen
112. Configurable launcher • Not part of the Main App • Test multiple scenarios • Quickly access your screen • Experiments
113. Recap
114. Recap Tooling Scripts, Type-safe project accessors, Gradle Catalog, Configuration Caching, Module Graph Assert
115. Recap Practices “Good” & “Bad” Modules, Critical Path, Gradle Enterprise Tooling Scripts, Type-safe project accessors, Gradle Catalog, Configuration Caching, Module Graph Assert
116. Recap Tooling Scripts, Type-safe project accessors, Gradle Catalog, Configuration Caching, Module Graph Assert Practices “Good” & “Bad” Modules, Critical Path, Gradle Enterprise Sample Apps How to, Hilt, Configurable Launchers
117. Thanks!
118. Questions?
119. @leboncoinEng https://leboncoin.tech/ We’re hiring!