I have a REST service method that uses the POST http method and accepts application/json. The JSON is bound to a JAXB bean:
@POST
public void test(final HierResult obj) throws Exception {
printHierResult(obj);
}
@XmlRootElement
public static class HierResult {
public String dummy;
}
I noticed that when somebody sends me a syntactically valid JSON containing unknown field, say { "aaa": "bbb" } then no error is logged, but the web server returns:
HTTP/1.1 400 Bad Request
Server: WildFly/11
Unrecognized field "aaa" (class HierResult), not marked as ignorable
So the question is: how do I log this error?
I registered an ExceptionMapper for java.lang.Exception, but it can only catch JsonParseException or the exceptions thrown by my java method, not the error above.
@Provider
public class MyExceptionLogger implements ExceptionMapper<Exception> {
private static final Logger LOGGER = LoggerFactory.getLogger(MyExceptionLogger.class);
@Override
public Response toResponse(final Exception exception1) {
LOGGER.error("", exception1);
return Response
.serverError()
.status(Response.Status.BAD_REQUEST)
.entity(String.valueOf(exception1.toString()))
.build();
}
}
@javax.ws.rs.ApplicationPath("webresources")
public class ApplicationConfig extends Application {
@Override
public Set<Class<?>> getClasses() {
final Set<Class<?>> resources = new java.util.HashSet<>();
addRestResourceClasses(resources);
return resources;
}
private void addRestResourceClasses(final Set<Class<?>> resources) {
resources.add(MyExceptionLogger.class);
}
}
As @PaulSamsotha commented, had to register a mapper that has same or more pricise exception class.
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<version>2.10.2</version>
<artifactId>jackson-databind</artifactId>
<scope>provided</scope>
</dependency>
_
import com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException;
public class TestMapper implements ExceptionMapper<UnrecognizedPropertyException> {
private static final Logger LOGGER = LoggerFactory.getLogger(TestMapper.class);
@Override
public Response toResponse(final UnrecognizedPropertyException exception1) {
LOGGER.error("server side error", exception1);
return Response
.serverError()
.status(Response.Status.INTERNAL_SERVER_ERROR)
.entity(String.valueOf(Response.Status.INTERNAL_SERVER_ERROR))
.build();
}
}