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About Sebastian Daschner

Sebastian Daschner

Sebastian Daschner is a self-employed Java consultant and trainer. He is the author of the book ‘Architecting Modern Java EE Applications’. Sebastian is a Java Champion, Oracle Developer Champion and JavaOne Rockstar.

Using JAX-RS exceptions for status codes

One way to send specific HTTP (error) status codes from a JAX-RS resource is to use the javax.ws.rs.core.Response class with its Builder Pattern-like API. If you want to specify the return type according to the response body, you can still do so and send a different status on errors by throwing a WebApplicationException.

@Path("test")
public class TestResource {

    @GET
    public String hello() {
        if (new Random().nextBoolean())
            throw new WebApplicationException(Response.Status.CONFLICT);

        return "Hello World, " + Instant.now();
    }

}

The constructors of this special type of exception accepts Responses, Response.Statuses or int types. The JAX-RS runtime will send the corresponding HTTP statuses and header fields, respectively.

There are also pre-defined subtypes of WebApplicationException for common errors like NotFoundException or BadRequestException.

Published on Java Code Geeks with permission by Sebastian Daschner, partner at our JCG program. See the original article here: Using JAX-RS exceptions for status codes

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