[jboss-jira] [JBoss JIRA] (AS7-4334) RESTeasy: Cannot configure Jackson ObjectMapper via ContextResolver nor Application.getSingletons()

RESTeasy: Cannot configure Jackson ObjectMapper via ContextResolver nor Application.getSingletons() --------------------------------------------------------------------------------------------------- Key: AS7-4334 URL: https://issues.jboss.org/browse/AS7-4334 Project: Application Server 7 Issue Type: Bug Components: REST Affects Versions: 7.1.1.Final Environment: JBoss AS 7.1.1 Reporter: Hendy Irawan Assignee: Stuart Douglas This doesn't work: {code} @Provider @Produces(MediaType.APPLICATION_JSON) public class JacksonContextResolver implements ContextResolver<ObjectMapper> { private transient Logger log = LoggerFactory.getLogger(JacksonContextResolver.class); private ObjectMapper objectMapper; public JacksonContextResolver() throws JsonGenerationException, JsonMappingException, IOException { log.info("Using my own Jackson ObjectMapper"); objectMapper = new ObjectMapper(); objectMapper.configure(Feature.INDENT_OUTPUT, true); objectMapper.configure(Feature.WRITE_DATES_AS_TIMESTAMPS, false); objectMapper.configure(Feature.WRITE_DATE_KEYS_AS_TIMESTAMPS, false); log.info("Test date: {}", objectMapper.writeValueAsString(new DateTime())); log.info("Test pretty output: {}", objectMapper .writeValueAsString(new Article("Launching AksiMata", "AksiMata : Ada apa di sana?", "Webapp yang keren dan oke punya.", "Hendy Irawan"))); } @Override public ObjectMapper getContext(Class<?> type) { return objectMapper; } } {code} The log correctly tests the custom ObjectMapper works fine, however when returning the output, seems like it's still using the "default" ObjectMapper. This also doesn't work: {code} @Override public Set<Object> getSingletons() { Set<Object> singletons = new HashSet<Object>(super.getSingletons()); ObjectMapper objectMapper = new ObjectMapper(); objectMapper.configure(Feature.INDENT_OUTPUT, true); objectMapper.configure(Feature.WRITE_DATES_AS_TIMESTAMPS, false); objectMapper.configure(Feature.WRITE_DATE_KEYS_AS_TIMESTAMPS, false); singletons.add(objectMapper); return singletons; } {code} Sample project to reproduce the issue is at: https://github.com/soluvas/ear-sample/tarball/resteasy-jackson-bug After deploy, check the output via: http://localhost:8080/api/article/ Bug is almost similar to #AS7-1408.