Question

Here is my Strifified json,

 {
       "Request":{
              "Object1":{
                 "Key1":"Value1"
              },
              "Object2":{
                  "Key2":"Value2"
              }
       },
       "Object3":{
                 "Key3":"Value3"
       }
}

I am forming this using Gson. String Stringifiedjson = new Gson().toJson(user);
Here is what i am trying to achive.

RestTemplate rest = new RestTemplate();
String url = "";
String event = rest.getForObject(url, Stringifiedjson);

1. How would i send to my REST Service and get back my result in onEventHandler or onErrorHandler. I am basically from JavaScript background.
2. Why does the method getForObject does not accept String, String as params.

Update:

AuthenticateUser user = new AuthenticateUser(credential, Header);       
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setContentType(new MediaType("application","json"));         
//HttpEntity<AuthenticateUser> requestEntity = new HttpEntity<AuthenticateUser>(user, requestHeaders);


RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
restTemplate.getMessageConverters().add(new StringHttpMessageConverter());
String url = "url";             
String result = restTemplate.postForObject(url, AuthenticateUser.class, String.class);

Attached is the pastie of what exception i am getting.

http://pastie.org/private/efyfvvbxyxdsvm3lvv7q

Answer 1

About the second question: I just found this example (you could take a look at the entire doc 😉 )

2.7.1 Basic Usage Example
The following example shows a query to google for the search term “SpringSource”.

String url = "https://ajax.googleapis.com/ajax/services/search/web?v=1.0&q={query}";

// Create a new RestTemplate instance
RestTemplate restTemplate = new RestTemplate();

// Add the String message converter
restTemplate.getMessageConverters().add(new StringHttpMessageConverter());

// Make the HTTP GET request, marshaling the response to a String
String result = restTemplate.getForObject(url, String.class, "SpringSource");

getForObject

public <T> T getForObject(URI url,
                    Class<T> responseType)
          throws RestClientException
Description copied from interface: RestOperations
Retrieve a representation by doing a GET on the URL . The response (if any) is converted and returned.
Specified by:
getForObject in interface RestOperations
Parameters:
url - the URL
responseType - the type of the return value
Returns:
the converted object
Throws:
RestClientException

The exception in your stacktrace could be related to the same issue of this post. The problem occurs when your app tries to make a connection in the main thread.