Spring RestTemplate not accepting JAXBElement - spring

Question

I am trying to make a simple POST using RestTemplate to a service. The XSD that I have, does not generate the Root Element but instead has the Root Element Type. But ObjectFactory.createFoo(FooType) gives me the JAXBElement which I am trying to post but failing to do so with below exception:
org.springframework.web.client.RestClientException: Could not write request: no suitable HttpMessageConverter found for request type [com.foo.FooType] and content type [application/xml]
This is my code which calls the rest service
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_XML);
HttpEntity<FooType> entity = new HttpEntity<FooType>(request.getValue(),headers);
JAXBElement<ResponseType> response = restTemplate.postForObject(esbReplaceNumberListURI, entity, JAXBElement.class);
I tried adding Jaxb2Marshaller(of Spring O/X jar ) to RestTemplate with setSupportJaxbElementClass set as true after going through an answer in StackOverflow. That did not help.
I am building my request object as below which gives me JAXBElement
JAXBElement<FooType> request = ObjectFactory.createFoo(FooType);
and then while posting I do a request.getValue() as below:
HttpEntity<FooType> entity = new HttpEntity<FooType>(request.getValue(),headers);
My Spring Config as below:
#Bean
public RestTemplate restTemplate() {
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(getMarshallingHttpMessageConverter());
return restTemplate;
}
#Bean
public MarshallingHttpMessageConverter getMarshallingHttpMessageConverter() {
MarshallingHttpMessageConverter marshallingConverter = new MarshallingHttpMessageConverter();
marshallingConverter.setMarshaller(jaxb2Marshaller());
marshallingConverter.setUnmarshaller(jaxb2Marshaller());
marshallingConverter.setSupportedMediaTypes(Arrays.asList(MediaType.APPLICATION_OCTET_STREAM, MediaType.APPLICATION_XML, MediaType.TEXT_XML));
return marshallingConverter;
}
#Bean
public Jaxb2Marshaller jaxb2Marshaller() {
Jaxb2Marshaller marshaller = new Jaxb2Marshaller();
marshaller.setSupportJaxbElementClass(Boolean.TRUE);
marshaller.setPackagesToScan("com.foo.domain.*");
return marshaller;
}
Using Spring-Boot 1.3.5.RELEASE which in turn uses Spring 4.2.6.RELEASE.
I am at my wits end in figuring this out. Any help is much appreciated.

Answer 1

I'm about 75% sure that you should have marshaller.setPackagesToScan("com.foo.domain");, not marshaller.setPackagesToScan("com.foo.domain.*");. Note the absence of the * - I believe that it's attempting to find a package whose name literally is *, which obviously doesn't exist.
Source:
Jaxb2Marshaller#setPackagesToScan:
This is using a Spring-bases search and therefore analogous to Spring's component-scan feature ({#link org.springframework.context.annotation.ClassPathBeanDefinitionScanner})
That suggests it's probably the same as described in the Spring Reference, which says:
The following is an alternative using XML
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="org.example"/>
</beans>
Which has <context:component-scan base-package="org.example"/>.