[SOLVED] Quarkus Microprofile Rest Client ResponseExceptionMapper doesn't catch errors

Quarkus Microprofile Rest Client ResponseExceptionMapper doesn't catch errors

I have a Rest Client in a Quarkus (1.8.1) service defined like this:

@RegisterRestClient
@Path("/")
@Produces("application/json")
@Consumes("application/json")
public interface MyClient {
    @POST
    @Path("/{entity}")
    Response postEntity(@HeaderParam(value = "Authorization") String auth, 
            @PathParam("entity") String entity, Object payload) throws MyException;
}

And I have implemented ResponseExceptionMapper in the same package like this:

public class MyExceptionMapper implements ResponseExceptionMapper<MyException> {
    @Override
    public MyException toThrowable(Response r) {
        return new DynamicsException(r.getStatus() + " - " + r.readEntity(String.class));
    }
}

When I call the service it is currently returning a 404 error, and I expected the code in the MyExceptionMapper class to be called. However it doesn't and instead a javax.ws.rs.WebApplicationException is thrown. The stack trace includes a call to the DefaultResponseExceptionMapper. It's seems that my mapper has not been registered.

How can I register my handler for invalid responses from calls to the service?

Solution

You need to register MyExceptionMapper as provider to the rest client with @RegisterProvider(MyExceptionMapper.class).

@RegisterRestClient
@RegisterProvider(MyExceptionMapper.class)
@Path("/")
@Produces("application/json")
@Consumes("application/json")
public interface MyClient {