private async Task <T> TryWithFallback <T>(Func <IGitHubActor, GitHubCacheDetails, Task <T> > action, GitHubCacheDetails cacheOptions)
where T : GitHubResponse
{
IGitHubActor actor = null;
if (cacheOptions?.UserId != null)
{
if (!_actorMap.TryGetValue(cacheOptions.UserId, out actor))
{
cacheOptions = null;
}
}
while (true)
{
if (actor == null)
{
actor = GetNextActor();
}
try {
var result = await action(actor, cacheOptions);
// Only retry authorization failures and rate limiting
switch (result.Status)
{
case HttpStatusCode.Forbidden:
case HttpStatusCode.Unauthorized:
// Retry with someone else.
Remove(actor.GetPrimaryKeyLong());
actor = null;
break;
default:
return(result);
}
} catch (GitHubRateException) {
Remove(actor.GetPrimaryKeyLong());
actor = null;
} catch (InvalidOperationException) {
// Grain activation failed
Remove(actor.GetPrimaryKeyLong());
actor = null;
}
}
}
