Did you write a Spring Boot starter? Why? What features did you encounter?

Yes, I have written Spring Boot starters to simplify the integration of custom libraries and configurations into Spring Boot projects. The main goal is to provide developers with a convenient way to connect functionality with minimal setup.

Features I encountered include:

• Proper definition of auto-configurations with conditions based on the presence of classes or beans, to avoid interfering with other configurations.
• Dependency management to prevent version conflicts.
• Testing starters using @SpringBootTest and profiles.
• Documenting configuration properties so users understand how to configure the starter.

An example of a simple starter configuration:

@Configuration
@ConditionalOnClass(MyService.class)
@EnableConfigurationProperties(MyProperties.class)
public class MyAutoConfiguration {

    @Bean
    @ConditionalOnMissingBean
    public MyService myService(MyProperties props) {
        return new MyService(props.getParam());
    }
}