Tutorial

A tutorial for event sourcing in Python.

This tutorial shows how to write an event-sourced application in Python. It expands and explains the Synopsis. It prepares new users of the library for reading the Modules documentation.

• Tutorial - Part 1 - Getting started
  • Python classes
  • Event-sourced aggregates
  • Event-sourced applications
  • Writing tests
  • Project structure
  • Exercise
  • Next steps
• Tutorial - Part 2 - Aggregates
  • Aggregates in more detail
  • “Created” events
  • Subsequent events
  • Explicitly defined event classes
  • Decorating private methods
  • Exercises
  • Next steps
• Tutorial - Part 3 - Applications
  • Applications in more detail
  • Repository
  • Event store
  • Mapper
  • Recorder
  • Command methods
  • Query methods
  • Notification log
  • Database configuration
  • Development environment
  • SQLite environment
  • PostgreSQL environment
  • Exercises
  • Next steps
• Tutorial - Part 4 - Projections
  • Views
  • View test case
  • View interface
  • In-memory view
  • PostgreSQL view
  • Projections
  • Example projection
  • Runners
  • Counting events in memory
  • Counting events in PostgreSQL
  • Exercises
  • Next steps
• Tutorial - Part 5 - Systems
  • Process applications
  • Defining an event-driven system
  • Running an event-driven system
  • Single-threaded runner
  • Multi-threaded runner
  • SQLite environment
  • PostgreSQL environment
  • Exercises
  • Next steps