protected virtual string ExecuteWithCache(IClientCache cache,
string url,
string key,
Func<IClientCache, string, string> cacheScheme)
{
var fetch = cache.Get<string>(CreateCacheKey(key, url));
if (fetch != null)
{
return fetch;
}
var result = cacheScheme.Invoke(cache, url);
return result;
}
protected virtual string ExecuteWithCacheAndSlidingExpiration(IClientCache cache,
string url,
string key,
TimeSpan expiry,
Func<IClientCache, string, TimeSpan, string>
cacheScheme)
{
var fetch = cache.Get<string>(CreateCacheKey(key, url));
if (fetch != null)
{
return fetch;
}
var result = cacheScheme.Invoke(cache, url, expiry);
return result;
}
// expects real cache key, not prefix
private void ExecuteGetAsyncAndCacheWithExpiry(IClientCache cache, string key, string url,
TimeSpan slidingExpiration, IWebQueryClient client)
{
var fetch = cache.Get<string>(key);
if (fetch != null)
{
var args = new WebQueryResponseEventArgs(fetch);
OnQueryResponse(args);
}
else
{
var state = new Pair<IClientCache, Pair<string, TimeSpan>>
{
First = cache,
Second = new Pair<string, TimeSpan> {First = key, Second = slidingExpiration}
};
var args = new WebQueryRequestEventArgs(url);
OnQueryRequest(args);
client.OpenReadCompleted += client_OpenReadCompleted;
client.OpenReadAsync(new Uri(url), state);
}
}
