[CAMEL-12627] Use Spring Boot autoconfigure-processor to optimize auto-configurations

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.21.1
• Fix Version/s: 2.23.0
• Component/s: camel-spring-boot, camel-spring-cloud
• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: brian clozel
• Created: 05/Jul/18 20:46
• Updated: 15/Jul/18 07:12
• Resolved: 15/Jul/18 07:12

Description

As explained in the its reference documentation, Spring Boot provides a spring-boot-autoconfigure-processor.

This should be added as an optional dependency to each module that contains AutoConfiguration classes (and the `spring.factories` file declaring them).

Once configured, this annotation processor will generate metadata at compile time and will help Spring Boot process those auto-configurations without loading the actual classes in some cases.

In this project, the several modules are declaring auto-configurations but are not using this annotation processor. Could you add it to the build files?

<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-autoconfigure-processor</artifactId>
 <optional>true</optional>
</dependency>

Once added, this should generate a spring-autoconfigure-metadata.properties file in the target/classes/META-INF folder of earch module.