🔗 GenServer state management in Elixir: A production order book

One GenServer manages critical aspects of trading like open positions, pending orders, and strategy state in real-time systems. This article highlights the state struct that powers the RealtimeTrader, which functions as a session-scoped process in a trading pipeline. It breaks down the state management into three essential categories: runtime data comprising orders and account balance, collaborator references for dependency management, and operational flags that control system behavior.

The article emphasizes design choices that allow strategies to maintain state effectively and how important features like trading flags can prevent system errors, ensuring trading activities run smoothly. Furthermore, readers gain access to full source code, enabling them to see production-grade implementations directly in action.