/// <summary>
/// Attempts to read stored object from file system
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="fileName"></param>
/// <returns>Object (or null if not exists)</returns>
public static T GetItem <T>(string fileName, int?cacheDurationSeconds = null)
{
try
{
lock (padlock)
{
int expirationSeconds = (cacheDurationSeconds != null) ? (int)cacheDurationSeconds : Config.ExpirationSeconds;
//will first check if blob is stale (expired), if not will download and turn
string res = AzureBlob.DownloadBlob(fileName, expirationSeconds);
T resp = JsonConvert.DeserializeObject <T>(res);
if (resp is T)
{
//we know that if we've arrive here, both mem and file cache are empty
//save resp in file cache (which will push into memory)
FileCache.AddItem(resp, fileName, cacheDurationSeconds);
return(resp);
}
}
}
catch (Exception ex)
{
throw ex;
}
return(default(T));
}