I am using retrofit 2.0.0-beta1 with SimpleXml. I want the retrieve a Simple (XML) resource from a REST service. Marshalling/Unmarshalling the Simple object with SimpleXML works fine.
When using this code (converted form pre 2.0.0 code):
final Retrofit rest = new Retrofit.Builder()
.addConverterFactory(SimpleXmlConverterFactory.create())
.baseUrl(endpoint)
.build();
SimpleService service = rest.create(SimpleService.class);
LOG.info(service.getSimple("572642"));
Service:
public interface SimpleService {
@GET("/simple/{id}")
Simple getSimple(@Path("id") String id);
}
I get this exception:
Exception in thread "main" java.lang.IllegalArgumentException: Unable to create call adapter for class example.Simple
for method SimpleService.getSimple
at retrofit.Utils.methodError(Utils.java:201)
at retrofit.MethodHandler.createCallAdapter(MethodHandler.java:51)
at retrofit.MethodHandler.create(MethodHandler.java:30)
at retrofit.Retrofit.loadMethodHandler(Retrofit.java:138)
at retrofit.Retrofit$1.invoke(Retrofit.java:127)
at com.sun.proxy.$Proxy0.getSimple(Unknown Source)
What am i missing? I know that wrapping the return type by a Call
works. But I want the service to return business objects as type (and working in sync mode).
UPDATE
After added the extra dependancies and .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
as suggested by different answers, I still get this error:
Caused by: java.lang.IllegalArgumentException: Could not locate call adapter for class simple.Simple. Tried:
* retrofit.RxJavaCallAdapterFactory
* retrofit.DefaultCallAdapter$1
In case of Kotlin and coroutines this situation happened when I forgot to mark api service function as suspend
when I call this function from CoroutineScope(Dispatchers.IO).launch{}
:
Usage:
val apiService = RetrofitFactory.makeRetrofitService()
CoroutineScope(Dispatchers.IO).launch {
val response = apiService.myGetRequest()
// process response...
}
ApiService.kt
interface ApiService {
@GET("/my-get-request")
suspend fun myGetRequest(): Response<String>
}