C# on Jun Wu

Developer’s Guide: Elegant Architecture for Asynchronous, Multi-Condition Judgments with External Dependencies

Mon, 30 Jun 2025 00:00:00 +0000

Developer’s Guide: Elegant Architecture for Asynchronous, Multi-Condition Judgments with External Dependencies Link to heading

1. Background Link to heading

In backend development, we often encounter complex scenarios that involve:

Multiple asynchronous conditions to determine whether to execute a business logic
Each condition may rely on a different external system/API (e.g., order, comment, reward)
Delayed execution after a condition check passes (e.g., reward sent 24 hours after comment)
Auditability and traceability of each rule/check

Example Use Case Link to heading

After a user submits a product comment, the system must check if the user is eligible for a $1 reward. If eligible, the system will issue the reward within 24 hours.