Demystifying Molecule: Running Your Own Compositions For Fun And Profit
summary
Molecule turns a Composable into an asynchronous stream by running a recomposer + composition with a no‑op applier, observing snapshot state via a conflated channel, and emitting values as a Flow; it exposes moleculeFlow (cold back‑pressured flow) and launchMolecule (state flow) and uses an immediate frame clock in tests so recomposition isn’t racy. Cash App uses it in production, tests use Turbine, and the approach simplifies combining state and job management.
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chapters (12)
- 0:00Introduction
- 1:59Compose UI basics
- 5:30Separating UI and logic
- 8:41From callbacks to RxJava
- 13:55Kotlin coroutines and flows
- 17:43Compose without UI
- 22:05Building Molecule runtime
- 28:24Key Molecule concepts
- 31:55Testing with Molecule
- 35:47Architecture with Compose
- 39:16Alternatives and libraries
- 40:39Wrap-up and resources
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