In the fast-paced world of application development, understanding the factors that contribute to your Spring Boot application’s startup time can be vital for optimizing performance. Enter the Spring Boot Startup Report library – your new ally in uncovering insights about application initialization.

What is the Spring Boot Startup Report?

The Spring Boot Startup Report library generates an interactive HTML report at runtime, providing visibility into what impacts the startup time of your application. This tool can help developers identify bottlenecks and optimize the launch time effectively.

Key Features

• Interactive startup report available during runtime as an HTML page.
• Generation of startup reports in integration tests.
• Flame chart visualization for better understanding.
• Search functionality by class or annotation.

The report also includes a detailed table of bean instantiation, accompanied by flame graphs that visually represent the timing data, making it easier to digest significant information at a glance.

Minimum Requirements

Before diving in, ensure that your project meets these minimum requirements:

• Java 8
• Spring Boot versions 2.7+ or 3.0+

How to Use the Spring Boot Startup Report

Follow these steps to get started with generating startup reports for your Spring Boot application:

Step 1: Add the Dependency

Add the following dependency for the Spring Boot Startup Report to your pom.xml file (for Maven projects) or build script (for Gradle projects):

    com.maciejwalkowiak.spring
    spring-boot-startup-report
    0.2.0
    true

Step 2: Ensure Jackson is on the Classpath

Jackson is essential for generating reports. If you don’t already have it, include it in your dependencies:

    com.fasterxml.jackson.core
    jackson-databind

Step 3: Run Your Application

Once everything is set up, run your application. You can access the startup report at http://localhost:8080/startup-report.

Using the Library with Integration Tests

If you want to generate startup reports while running integration tests annotated with @SpringBootTest, the library will automatically generate reports for each application context.

For test slices using @WebMvcTest or @DataJpaTest, make sure to include:

@Import(StartupEventsAutoConfiguration.class)
@WebMvcTest(OwnerController.class)
public class OwnerControllerTests {
    // Test methods
}

For reports only during tests without runtime availability, you can declare the dependency in test scope:

    com.maciejwalkowiak.spring
    spring-boot-startup-report
    0.2.0
    test

Troubleshooting

If you encounter issues while integrating the Spring Boot Startup Report, consider the following troubleshooting steps:

• Ensure your dependencies are correctly defined in your build file.
• Make sure your application has the necessary permissions to access the report endpoint.
• Check your logs for any startup-related errors that may indicate a conflict with other libraries.
• If the report isn’t visible, confirm that your application is running and accessible at the designated port.

For more insights, updates, or to collaborate on AI development projects, stay connected with fxis.ai.

Conclusion

The Spring Boot Startup Report offers invaluable tools for optimizing application performance. By following the guide above, you can easily integrate this library and gain insight into your application’s startup timing. At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.