DAO Configuration: Configurable Vs Hard-Coded Values
DAOs can be configured with environment variables or hardcoded values. Configurable values introduce maintenance & consistency issues. Only create them when necessary.
Glossary
DAO - Data access object
Case study
Once upon a time, there was a process within a monolithic enterprise system.
Its purpose was to receive product codes from external API, query the database, and send product data to another external API.
PlantUML Text
@startuml Example Process
skinparam componentStyle rectangle
database "Product Table"
rectangle "Process" {
[Admin UI]
[Service]
[DAO]
}
[Admin UI] --> Service: clicks to run
[API 1] -> [Service] : product\ncodes
[Service] -> [API 2] : products
[Service] -> [DAO] : product\ncodes
[Service] <-- [DAO] : products...