Check database constraints on-the-fly.

SomeDto.java

...
import javax.validation.constraints.Min;
import javax.validation.constraints.Size;
import javax.validation.constraints.NotNull;

@Data
public class SomeDto {
    @Min(0)
    private int id;
    @Size(min=2, max=8)
    private String firstName;
    @NotNull
    private String lastName;
}