[jira] [Created] (CAMEL-20664) camel-mapstruct - MapStruct mappers not found in Spring Boot

["Josh Reagan (Jira)" <ji...@apache.org>]

Josh Reagan created CAMEL-20664:
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             Summary: camel-mapstruct - MapStruct mappers not found in Spring Boot
                 Key: CAMEL-20664
                 URL: https://issues.apache.org/jira/browse/CAMEL-20664
             Project: Camel
          Issue Type: Bug
          Components: camel-mapstruct
    Affects Versions: 4.0.0
         Environment: $ java -version
openjdk version "17.0.7" 2023-04-18
OpenJDK Runtime Environment Temurin-17.0.7+7 (build 17.0.7+7)
OpenJDK 64-Bit Server VM Temurin-17.0.7+7 (build 17.0.7+7, mixed mode, sharing)
            Reporter: Josh Reagan
         Attachments: camel-mapstruct-demo.zip

The `DefaultMapStructFinder` is unable to locate the `Mapper` classes when running in Spring Boot. Seems to throw an exception calling `PluginHelper.getPackageScanClassResolver(ecc).findByFilter(f -> f.getName().endsWith("Mapper"), names);` inside the `doInit()` method.

You can work around this by creating your own `MapStructFinder`, extending `DefaultMapStructFinder`, overriding the `doInit()` function, and calling `discoverMappings(...)` with each of your `Mapper` classes. That way it doesn't try to scan the classpath to find the `Mapper` classes automatically. I've attached a working example to illustrate.

*Note: It has no issue locating them when running `mvn spring-boot:run`. Only when running from the packaged uber jar with `java -jar ...`.



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