Question

I have two request mappings in a Spring MVC 3 application, one which takes json and xml, and another that takes application/x-www-form-urlencoded data. Example:

@RequestMapping(value={"/v1/foos"}, method = RequestMethod.POST, consumes={"application/json", "application/xml"})
public FooDTO createFoo(@RequestBody FooDTO requestDTO) throws Exception {
    ...
}

@RequestMapping(value={"/v1/foos"}, method = RequestMethod.POST, consumes="application/x-www-form-urlencoded")
public FooDTO createFooWithForm(@ModelAttribute FooDTO requestDTO) throws Exception {
    ...
}

I expected that the different consumes parameter makes each request unique, though I get an java.lang.IllegalStateException: Ambiguous handler methods mapped....

Should consumes and produces makes requests unique? Any ideas?

Edit 1: To add weight to this, if you set the content-type in the header rather than using consumes, this actually works and makes them unique: headers="content-type=application/x-www-form-urlencoded. Perhaps there is a bug with consumes?

Edit 2: We’re using Spring 3.1.1.RELEASE.

Answer 1

This has been resolved by Marten Deinum on the Spring Forum (here):

You should change both the HandlerMapping as well as the
HandlerAdapter (use the RequestMappingHandlerAdapter).

In theory it should work if it doesn’t feel free to register an issue.

The solution to this problem was to use the correct HandlerMapping and HandlerAdapter in my servlet configuration:

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>

Thanks Marten.