Retrofit 2: Catch connection timeout exception

Question

I have the following setup:

final OkHttpClient okHttpClient = new OkHttpClient();
okHttpClient.setReadTimeout(5, TimeUnit.SECONDS);
okHttpClient.setConnectTi         


        

Answer 1

Kotlin

If you want to use Retrofit in Kotlin follow below steps:

Define your Retrofit interface:

interface GitHubApi {

    @GET("/users/{userName}/repos")
    fun repos(@Path("userName") userName: String): Call>
}

Implement your service:

class Api(...) {

    private val baseUrl = "https://api.github.com"
    private val api: GitHubApi

    private fun loggingInterceptor(...): HttpLoggingInterceptor {...}

    private fun okHttpBuilder(): OkHttpClient {...}

    init {...}

    fun repos(
        userName: String,
        onSuccess: (list: List?) -> Unit,
        onFailure: (message: String?) -> Unit): Future {
        return runAsync(api.repos(userName), onSuccess, onFailure)
    }

    private fun  runAsync(
        call: retrofit2.Call,
        onSuccess: (T?) -> Unit,
        onFailure: (message: String?) -> Unit) : Future {
        return doAsync {
            try {
                val response = call.execute()
                when {
                    response.isSuccessful -> response.body()?.let {
                        onSuccess(it)
                    }
                    else -> {
                        onFailure(response.raw().message())
                    }
                }
            } catch (e: IOException) {
                if (e is SocketTimeoutException) {
                    onFailure("Response time out!")
                } else {
                    onFailure(e.message)
                }
            }
        }
    }
}

Call your service in where you want:

Api().repos("olcayertas",
    onSuccess = {
        Log.d("MainActivity", "Response:\n" + toJson(it))
    },
    onFailure = {
        Log.e("MainActivity", "Error: $it")
    })

You can handle any exception you want in runAsync function.

You can get fully working example here.