public async Task <T> GetHttpWithSpool(string key, string url, int howLongToStoreSec,
Func <string, string, T> decoder)
{
T data = null;
try
{
SpoolItem <T> item = TrySpool(key, url, howLongToStoreSec);
if (item.Data != null)
{
return(item.Data);
}
string jsonBody = await Client.GetHttpStringAsync(url);
item.Data = decoder(key, jsonBody);
return(item.Data);
}
catch (Exception ex)
{
Log.LogError(ex.StackTrace);
return(null);
}
return(null);
}
private SpoolItem <T> TrySpool(string key, string url, int howLongToStoreSec)
{
SpoolItem <T> item = DictLazy.Value.AddOrUpdate(key,
(key) =>
{
// Create New Instance for Spooler
return(new SpoolItem <T>()
{
Key = key,
ActualUntil = DateTime.Now.AddSeconds(howLongToStoreSec),
Data = null
});
},
(_url, _item) =>
{
// Test of Existing Instance for Time Existance
if (_item.ActualUntil < DateTime.Now)
{
_item.Data = null;
Log.LogInformation($"Old tem {url} removed");
}
return(_item);
}
);
return(item);
}
public T TryGetValue(string key)
{
SpoolItem <T> item = null;
if (Dict.TryGetValue(key, out item))
{
if (item.ActualUntil <= DateTime.Now)
{
Dict.TryRemove(key, out item);
item = null;
}
}
return((item != null) ? item.Data : null);
}
public T TryAddValue(string key, T p)
{
SpoolItem <T> item = Dict.AddOrUpdate(key, item => ToSpoolItem(p), (item, old) => ToSpoolItem(p));
return(item.Data);
}
