Description
Description
When trying to use a jar containing a generated client for a Spring Boot 3 service in a Spring 5 project, the application fails to start because of the new introduced HttpStatusCode in Spring 6.
We have many Spring Boot 2.x and now also 3.x services, for which we provide small client jars that can be used by consumers. For that we wrote a small maven plugin that is added to each service, which will start the service, downloads the api-docs, generates the client classes, compiles, builds a jar of it and deploys it to our artifactory.
This way we could offer a quick way to use our service in other projects to many consumers, without them needing to do more than adding one dependency.
Now when generating the client jar in a spring boot 3 service, this client cannot be used in any project with an older spring boot / spring version, because every endpoint validation will throw an HttpClientErrorException with the constructor needing a HttpStatusCode (where previously needing a HttpStatus).
When trying to start the consuming application, any class relying to the client will throw the following exception when being instantiated:
Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/http/HttpStatusCode
Setting 'useSpringBoot3' to 'true' won't make a difference for this api-break (although it works fine for all other Spring Boot 3 related changes).
openapi-generator version
7.6.0
Code snippets
The generated validation that causes the error
// verify the required parameter 'businessPartnerId' is set
if (businessPartnerId == null) {
throw new HttpClientErrorException(HttpStatus.BAD_REQUEST, "Missing the required parameter 'businessPartnerId' when calling retrieveAssignmentForBusinessPartner");
}The constructor of HttpClientErrorException before spring 6
public HttpClientErrorException(HttpStatus statusCode, String statusText) {
super(statusCode, statusText);
}The constructor of HttpClientErrorException after spring 6
public HttpClientErrorException(HttpStatusCode statusCode, String statusText) {
super(statusCode, statusText);
}Steps to reproduce
Use a pre-generated client in any project with spring version < 6
Related issues/PRs
spring-projects/spring-framework#28214
Suggest a fix
As the api-break is produced by spring, i cannot think of a fix in the openapi-generator plugin, but maybe an parameter could be introduced, which will use a generic Exception instead of the broken HttpClientErrorException for these validations.