public static T GetOrCreate <T>(
this IDbCache cache,
string key,
TimeSpan?expirationRelativeToNow,
Func <T> factory)
{
if (!cache.TryGetValue(key, out object result))
{
result = factory();
cache.CreateEntry(key, result, expirationRelativeToNow);
}
return((T)result);
}
public static async Task <T> GetOrCreateAsync <T>(
this IDbCache cache,
string key,
TimeSpan?expirationRelativeToNow,
Func <Task <T> > factory)
{
if (!cache.TryGetValue(key, out object result))
{
// Async version of GetOrCreate is necessary, because
// we want to store the result of Task<T> which is T.
result = await factory();
cache.CreateEntry(key, result, expirationRelativeToNow);
}
return((T)result);
}