CDI Input Validation with JAX-RS and Java EE 8
A CDI bean with parameters validated by Bean Validation:
import javax.validation.constraints.Size;
public class WorkshopCatalog {
public void save(@Size(min = 2, max = 5) String input) {
//...
}
}
and exposed with a JAX-RS resource:
@Path("workshops")
public class WorkshopsResource {
@Inject
WorkshopCatalog facade;
@POST
public void save(String input) {
this.facade.save(input);
}
}
throws on every violation an instance of ValidationException
which is automatically converted by JAX-RS into 400 Bad Request.
An invalid request with too short payload, like e.g.:
curl -i -XPOST -d'd' http://localhost:8080/beanvalidation/resources/workshops
leads to:
HTTP/1.1 400 Bad Request
Server: Payara Server 5.184 #badassfish
(...)
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Hi,
I tried the code and it works marvelous. I just have a little question.
How do I retrieve the messages from the validations constraints? The service just responds with a generic 400 error page.
I want to get the validations messages in the Response object.
I got this:
// -----------------------------------------
package test_validations;
import javax.validation.Valid;
import javax.validation.constraints.Size;
public class Facade {
public void save (@Size(min = 2, max = 5, message = "Wrong Length") String input) {}
public void save (@Valid ValidObject vo) {}
}
// -----------------------------------------
package test_validations;
import javax.inject.Inject;
import javax.validation.Valid;
import javax.validation.constraints.Size;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;
@Path("test")
public class Service {
@Inject
Facade facade;
@POST
@Path("facade")
public Response onFacade (String input) {
this.facade.save(input);
return Response.ok(input).build();
}
@POST
@Path("service")
public Response onService (@Size(min = 2, max = 5, message = "Wrong Length")String input) {
return Response.ok(input).build();
}
@POST
@Path("obj/facade")
public Response objFacade (ValidObject input) {
this.facade.save(input);
return Response.ok(input).build();
}
@POST
@Path("obj/service")
public Response objService (@Valid ValidObject input) {
return Response.ok(input).build();
}
}
// -----------------------------------------
package test_validations;
import javax.validation.constraints.NotBlank;
import lombok.Data;
@Data
public class ValidObject {
@NotBlank(message = "Is Blank")
private String string;
}
Posted by Ralph on December 28, 2018 at 01:24 AM CET #