Resolving the Multiple SimpleJDBCCall Beans Sonar Issue in Java Spring Boot

Learn how to handle `Multiple SimpleJDBCCall Beans` in your Spring Boot application to avoid Sonar issues, while maintaining clean and efficient code.
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Resolving the Multiple SimpleJDBCCall Beans Sonar Issue in Java Spring Boot

In the world of Java development, particularly when working with Spring Boot, one common challenge developers face is ensuring code quality across different tools and platforms. A specific issue arises when configuring multiple SimpleJDBCCall beans in your application, often resulting in SonarQube warnings. SonarQube is a tool that helps developers ensure their code is clean and maintainable, but sometimes its rules can be restrictive, especially when you're working with several similar beans.

In this guide, we'll explore a practical solution to handle the presence of multiple SimpleJDBCCall beans in a Spring Boot application while keeping SonarQube happy.

Understanding the Problem

In the scenario presented, the developer has a DatabaseConfig class where multiple SimpleJDBCCall beans are set up to interact with stored procedures. This results in a situation where:

The developer receives warnings from Sonar due to the excessive number of beans (in this case, more than 7).

Adjusting Sonar Qube settings is not an option due to shared configurations among multiple teams.

Here's how their configuration looks like:

[[See Video to Reveal this Text or Code Snippet]]

Here, additional SimpleJDBCCall beans are used for interactions with various stored procedures, leading to potential violations of Sonar rules.

Proposed Solution

Use a Map for Beans Injection

A straightforward way to resolve the Sonar issue is to define a Map as a constructor parameter in your DAO class. This approach groups all SimpleJDBCCall beans under a single parameter. Here’s how you can implement this:

[[See Video to Reveal this Text or Code Snippet]]

How It Works

Spring Boot Configuration:

By declaring the jdbcCalls parameter of type Map<String, SimpleJDBCCall>, Spring will automatically inject all beans of type SimpleJDBCCall into the map.

The keys of the map will be the bean names (like "spOne", "spTwo", etc.), while the values will correspond to their respective instances.

Utilizing the Beans:

Now, instead of referencing each bean individually, you can iterate through the map or access specific beans using their keys when needed.

Flexibility:

If you don’t need to access specific beans directly, you could also change your Map to a List for a simpler structure if your use case allows.

Benefits of This Approach

Reduced Complexity: You streamline your DAO by removing the need for multiple constructor parameters.

Sonar Compliance: This solution keeps the bean count under control, preventing triggering of SonarQube's warnings.

Scalability: Adding new stored procedures requires minimal changes to your existing configuration.

Conclusion

In summary, tackling the Sonar issue caused by multiple SimpleJDBCCall beans in a Spring Boot application can be efficiently managed by switching to a Map for dependency injection in your DAO class. This approach not only keeps your code base clean and compliant with SonarQube standards but also enhances the flexibility and maintainability of your application.

If you're faced with similar challenges, consider implementing this solution and see how it simplifies your configuration. Happy coding!