public override async Task <bool> Attempt(string url)
{
Result = default(T);
if (FallBackEventPolicy == ApiFallBackEventPolicy.Raise)
{
await FallBackEvent.Raise(new FallBackEvent
{
Url = url,
FriendlyMessage = $"Failed to get results from {url.AsUri().Host}."
});
}
return(true);
}
public override async Task <bool> Attempt(string url)
{
var cache = ApiResponseCache <T> .Create(url);
if (!await cache.HasValidValue(CacheAge))
{
Error = new Exception("No valid cache is available.");
return(false);
}
Result = cache.Data;
if (!Silent && FallBackEventPolicy == ApiFallBackEventPolicy.Raise)
{
await FallBackEvent.Raise(new FallBackEvent
{
Url = url,
CacheAge = cache.Age,
FriendlyMessage = $"Failed to get fresh results from {url.AsUri().Host}. Using the latest cache from {cache.Age.ToNaturalTime(1)} ago."
});
}
return(true);
}
internal Task OnFallBackEvent(FallBackEvent args) => FallBackEvent.Raise(args);
