/// <summary>
/// Return the cache value, or do the calculation.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="cacheName"></param>
/// <param name="key"></param>
/// <param name="calculateValue"></param>
/// <returns></returns>
public static async Task <T> NonNullCacheInDiskAsync <T>(string cacheName, string key, Func <Task <T> > calculateValue)
where T : class
{
var c = new DiskCacheTyped <T>(cacheName);
var r = c[key];
if (r == null)
{
r = await calculateValue();
if (r != null)
{
c[key] = r;
}
}
return(r);
}
/// <summary>
/// Return the cache value, or do the calculation.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="cacheName"></param>
/// <param name="key"></param>
/// <param name="calculateValue"></param>
/// <returns></returns>
public static T NonNullCacheInDisk <T>(string cacheName, string key, Func <T> calculateValue)
where T : class
{
if (calculateValue == null)
{
throw new ArgumentNullException("calculateValue");
}
var c = new DiskCacheTyped <T>(cacheName);
var r = c[key];
if (r == null)
{
r = calculateValue();
if (r != null)
{
c[key] = r;
}
}
return(r);
}