A functional workflow for bootstrapping applications
Application configuration and initialization are tangential to delivering business value, yet we frequently get bogged down by their incidental complexity. They crosscut various (Dev/QA/Prod etc.) environments and impact the workflow in subtle, disparate ways. In this session, I will discuss the experience of tackling this beast for several projects in a large team using an elegant functional programming approach. The approach was turned into a data-driven Clojure framework for applications to use. This success story is over two years old in production and it scales from a junior developer looking to learn the ropes to experienced folks focusing on advanced use cases. I will discuss the fundamentals of this approach, how it is used in production, in QA, and in development. I will also share the REPL-enabled development workflow and how it facilitates automated unit and integration testing.
Outline/structure of the Session
The outline is as follows:
- Why libraries are not enough
- Config files (sources, defaults, overrides)
- Application initialization as a workflow
- Modular, extensible, configurable initialization
- Entry points (CLI, Tests, Explicit vs implicit config, REPL, Maintenance tasks)
Attendee would learn the following:
- Application bootstrapping/initialization as a first class concern
- Various subtle aspects of application initialization
- Deal with application configuration
- Configuration chaining
- Defaults and overrides
- Shipping configuration with application
- Deal with application initialization
- Functional approach
- Similarity with Finite Automata
- Repeatable across applications
- Extensible workflow
- Reduce incidental complexity in application development
Those familiar with basic Functional Programming principles
Attendees should have some familiarity with functional programming. Knowledge of the Clojure programming language would be greatly beneficial to make the most out of the session.
schedule Submitted 1 month ago
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