authentication - Android - Retrofit 2 - Authenticator Result -

i'm trying use retrofit (2.0.0-beta3), when using authenticator add token, can't seem data synchronous call. our logging on back-end shows lot of login attempts, can't data body add header.

    public static class tokenauthenticator implements authenticator {     @override     public request authenticate(route route, response response) throws ioexception {         // refresh access_token using synchronous api request         userservice userservice = createservice(userservice.class);          call<session> call = userservice.emaillogin(new credentials("handle", "pass"));          // call made correctly, shows on back-end.         session body = call.execute().body();          // line never hit.         logger.d("session token: " + body.token);          // add new header rejected request , retry         return response.request().newbuilder()                 .header("auth-token", body.token)                 .build();         }     } 

i'm not sure on why it's not printing out. tips on how solve issue appreciated, taking time help.

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these sources i've been reading on how implement retrofit.

using authenticator:

• https://stackoverflow.com/a/31624433/3106174

• https://github.com/square/okhttp/wiki/recipes#handling-authentication

making synchronous calls retrofit 2:

• https://futurestud.io/blog/retrofit-synchronous-and-asynchronous-requests

i have similar authenticator , works 2.0.0-beta2.

if lots of login attempts authenticator, suggest make sure when make synchronous call, not using authenticator call. end in loop, if "emaillogin" fails.

also recommend adding logginginterceptor see trafic server: logging retrofit 2