Simplify gRPC Exception Handling

[o-shevchenko]

Introduce annotation-based exception handling for gRPC services

This allows simplified exception handling:

@GrpcAdvice
class MyExceptionHandler {
    @GrpcExceptionHandler
    fun handle(ex: TimeoutException): Status {
        return Status.DEADLINE_EXCEEDED.withDescription(ex.message)
    }
}

Signed-off-by: Oleksandr Shevchenko shevchenko.olexandr96@gmail.com

Inspired and heavily relies on https://github.com/grpc-ecosystem/grpc-spring/blob/master/grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/advice/GrpcExceptionHandler.java#L69

[resolves #350]

[dsyer]

The import order requirements from our checkstyle checks are annoyingly difficult to get right. I wish we didn't do it, but most Spring projects do it now to cut down on whitespace changes. You can get it right by looking at similar classes and copying the order. This one so far looks easy - you just need a blank line before the springframework imports.

[o-shevchenko]

The import order requirements from our checkstyle checks are annoyingly difficult to get right. I wish we didn't do it, but most Spring projects do it now to cut down on whitespace changes. You can get it right by looking at similar classes and copying the order. This one so far looks easy - you just need a blank line before the springframework imports.

Thanks @dsyer . I've pushed style changes

[dsyer]

If you build locally with Java 25 you should get the same error I guess.

[dsyer]

All good thanks. It’ll get merged once we branch off to 1.1.x.