Springboot content negotiation with param doesn't resolve when deployed as a WAR - rest

Question

I am trying to format my response content type on a #RestController between json and xml. It seems to work in the case of Accept header or path extension (.json,.xml). My application is packaged as a WAR and deployed to a tomcat instance. However I am facing 2 problems currently.
1) Even though I set my default content type to JSON on ContentNegotiationConfigurer a request like curl -X GET -H "Cache-Control: no-cache" http://localhost:8080/v1/api/version resolves to XML
2) When I use the param on the request the content resolves incorrectly. On accessing curl -X GET -H "Cache-Control: no-cache" http://localhost:8080/v1/api/version?format=json I get XML back.
SpringBoot Application
#EnableAutoConfiguration
#ComponentScan
#Configuration
#EnableWebMvc
public class Application extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
builder.sources(Application.class);
return super.configure(builder);
}
}
WebMvcConfigurerAdapter
#Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {
private RequestMappingHandlerAdapter requestMappingHandlerAdapter;
private CustomObjectMapper objectMapper;
#PostConstruct
public void init() {
List<HttpMessageConverter<?>> messageConverters = requestMappingHandlerAdapter.getMessageConverters();
for (HttpMessageConverter<?> messageConverter : messageConverters) {
if (messageConverter instanceof MappingJackson2HttpMessageConverter) {
MappingJackson2HttpMessageConverter m = (MappingJackson2HttpMessageConverter) messageConverter;
m.setObjectMapper(objectMapper);
}
}
}
#Override
public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
configurer
.defaultContentType(MediaType.APPLICATION_JSON)
.favorParameter(true)
.useJaf(false)
.mediaType("xml", MediaType.APPLICATION_XML)
.mediaType("json", MediaType.APPLICATION_JSON);
super.configureContentNegotiation(configurer);
}
#Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
mappingJackson2HttpMessageConverter.setObjectMapper(objectMapper);
converters.add(mappingJackson2HttpMessageConverter);
converters.add(createXmlHttpMessageConverter());
super.configureMessageConverters(converters);
}
private HttpMessageConverter<Object> createXmlHttpMessageConverter() {
MarshallingHttpMessageConverter xmlConverter =
new MarshallingHttpMessageConverter();
XStreamMarshaller xstreamMarshaller = new XStreamMarshaller();
xmlConverter.setMarshaller(xstreamMarshaller);
xmlConverter.setUnmarshaller(xstreamMarshaller);
return xmlConverter;
}
#Autowired
public void setRequestMappingHandlerAdapter(RequestMappingHandlerAdapter requestMappingHandlerAdapter) {
this.requestMappingHandlerAdapter = requestMappingHandlerAdapter;
}
#Autowired
public void setObjectMapper(CustomObjectMapper objectMapper) {
this.objectMapper = objectMapper;
}
}
Rest Controller
#RestController
#RequestMapping("/v1/api")
public class RestVersionController {
#ResponseStatus(HttpStatus.OK)
#RequestMapping(value = "/version", method = RequestMethod.GET)
public
#ResponseBody
ApiVersion getVersion() {
return new ApiVersion(1);
}
#JsonIgnoreProperties(ignoreUnknown = true)
#XmlRootElement
public static class ApiVersion {
int version;
String currentVersion = "Current version is ";
public ApiVersion() {
}
public ApiVersion(int version) {
this.version = version;
this.currentVersion = this.currentVersion + version;
}
public ApiVersion(int version, String currentVersion) {
this.version = version;
this.currentVersion = currentVersion;
}
public int getVersion() {
return version;
}
public void setVersion(int version) {
this.version = version;
}
public String getCurrentVersion() {
return currentVersion;
}
public void setCurrentVersion(String currentVersion) {
this.currentVersion = currentVersion;
}
}
}
Code # Github sample
Any help is appreciated, Thanks!