Spring boot how to handle throwable - spring-mvc

Question

I made a project like this sample. So the controllers are like this
package mypackagename.controller;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RequestMapping;
#RestController
#RequestMapping("/")
public class StoresRestController {
#RequestMapping(method = RequestMethod.GET)
public String stores() {
return ...
}
}
I like to handle all throwables and make my customized unified response. The problem is I cannot find a guide or a sample to do this correctly.
First of all, I tried ExceptionHandler, with Throwable, but it didn't work, so I decided to move on. Then, the most close approach that I found is this, so I tried jersey, by adding something like this. But it's not working for all throwables. Also, it's ignoring my controllers, by complaining
o.g.jersey.internal.inject.Providers : A provider mypackagename.controller.StoresRestController registered in SERVER runtime does not implement any provider interfaces applicable in the SERVER runtime. Due to constraint configuration problems the provider mypackagename.controller.StoresRestController will be ignored.
I searched for this error and found this, which I'm not using ContainerResponseFilter in my project as I provided the sample above. So I'm clueless. The main problem is how to handle all throwables, but if you can give me some suggestions about how to solve Providers problem, I'll be so appreciated.

Answer 1

In my project I use #ControllerAdvice to handle my exceptions. Here's an example. Hope this helps. Just make sure this class is on your component scan so it gets picked up.
#RestController
#ControllerAdvice
public class StoresExceptionHandler {
#ExceptionHandler(Throwable.class)
public ResponseEntity<Object> handleThrowable(final Throwable ex) {
return new ResponseEntity<Object>("Unable to process request.", HttpStatus.INTERNAL_SERVER_ERROR);
}
}

Answer 2

Finally this post helped me to handle all Throwables, except authentication exceptions. The important part was to use #EnableWebMvc and ResponseEntityExceptionHandler. To handle authentication exceptions I used this answer. Hope it's helping someone.

Answer 3

as #carlos-cook said, you could use a #ControllerAdvice and, ProblemDetail defined in RFC 7807 which could look like:
import org.springframework.http.ProblemDetail;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
#ControllerAdvice
public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {
#ExceptionHandler(RuntimeException.class)
public ProblemDetail handleUnexpectedException(RuntimeException rte, WebRequest wr) {
ProblemDetail pd = this.createProblemDetail(HttpStatus.INTERNAL_SERVER_ERROR, rte);
pd.setType(URI.create("http://your-site.com/internal-server-error"));
pd.setTitle("Internal server error");
return pd;
}
#ExceptionHandler(YourCustomeException.class)
public ProblemDetail handleUnexpectedException(YourCustomException rte, WebRequest wr) {
ProblemDetail pd = this.createProblemDetail(HttpStatus.INTERNAL_SERVER_ERROR, rte);
pd.setType(URI.create("http://your-site.com/custom-error-page"));
pd.setTitle("Internal server error");
return pd;
}
}
Then in your controller you could simply throw YourCustomException
This controller advice will handle every exception and YourCustomException separately.