AI BriefingHow to Configure Environment Variables in a Spring-Based Multi-Module Project
Key point
This article compares four methods for systematically managing environment variables in a Spring multi-module project and analyzes the optimal combination.
Details
Multi-module projects improve maintainability by increasing code reusability and clarifying dependencies, but they come with the challenge of deciding where and how to configure environment variables for each module.
When an API spec changes, you need to decide whether to place the environment variable files (yml, properties) in the API module or in the client module that contains the implementation. There is also the issue of managing different configuration values per Profile.
Four main approaches to environment variable configuration are compared:
- spring.config.import: An intuitive method of directly importing another module's configuration from the application's
application.yml - spring.profiles.include: A method of including other configuration files when a specific profile is activated
- @PropertySource: A method of specifying a configuration file at a specific class level
- Combination of @Profile and @PropertySource: A method that increases flexibility by configuring the app to load specific configuration files depending on the profile
KakaoPay ultimately chose the combined approach using @Profile and @PropertySource to systematically manage environment variable configuration and improve maintainability.
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