我正在使用kotlin协同路由进行网络请求,使用扩展方法在这样的 retrofit 中调用类
public suspend fun <T : Any> Call<T>.await(): T {
return suspendCancellableCoroutine { continuation ->
enqueue(object : Callback<T> {
override fun onResponse(call: Call<T>?, response: Response<T?>) {
if (response.isSuccessful) {
val body = response.body()
if (body == null) {
continuation.resumeWithException(
NullPointerException("Response body is null")
)
} else {
continuation.resume(body)
}
} else {
continuation.resumeWithException(HttpException(response))
}
}
override fun onFailure(call: Call<T>, t: Throwable) {
// Don't bother with resuming the continuation if it is already cancelled.
if (continuation.isCancelled) return
continuation.resumeWithException(t)
}
})
registerOnCompletion(continuation)
}
}
then from calling side i am using above method like this
private fun getArticles() = launch(UI) {
loading.value = true
try {
val networkResult = api.getArticle().await()
articles.value = networkResult
}catch (e: Throwable){
e.printStackTrace()
message.value = e.message
}finally {
loading.value = false
}
}
i want to exponential retry this api call in some case i.e (IOException) how can i achieve it ??