private void RefreshIfNecessary()
{
CachedInstance ci = current;
if (ci == null || updateTimer.ElapsedMilliseconds - ci.createdAt >= maxAgeMs)
{
lock (myLock)
{
ci = current;
if (ci == null || updateTimer.ElapsedMilliseconds - ci.createdAt >= maxAgeMs)
{
current = new CachedInstance(createNewObjectFunc(), updateTimer);
}
}
}
else if (updateTimer.ElapsedMilliseconds - ci.createdAt >= minAgeMs)
{
SetTimeout.OnBackground(() =>
{
ci = current;
if (updateTimer.ElapsedMilliseconds - ci.createdAt >= minAgeMs)
{
lock (myLock)
{
ci = current;
if (updateTimer.ElapsedMilliseconds - ci.createdAt >= minAgeMs)
{
current = new CachedInstance(createNewObjectFunc(), updateTimer);
}
}
}
}, 0);
}
}
/// <summary>
/// Reloads the cached object now without regard for the current age. Returns a reference to the object created by this method.
/// </summary>
public T Reload()
{
Interlocked.Increment(ref updateCounter);
try
{
CachedInstance ci = current = new CachedInstance(createNewObjectFunc(), updateTimer);
return(ci.instance);
}
finally
{
Interlocked.Decrement(ref updateCounter);
}
}
public object ActivateInstance(IObjectAssemblySpecification registration)
{
string key = registration.Key;
CachedInstance ci = null;
if (_cache.TryGetValue(key, out ci))
{
lock (_syncLock) ci.LastCacheHit = DateTime.UtcNow;
}
else
{
ci = new CachedInstance {
Instance = registration.CreateInstance(), LastCacheHit = DateTime.UtcNow
};
_cache.TryAdd(key, ci);
}
MaybeGroomCache();
return(ci.Instance);
}
public void FlushCache(IObjectAssemblySpecification registration)
{
CachedInstance _ = null;
_cache.TryRemove(registration.Key, out _);
}
private bool NeedsUpdate(long ageLimitMs)
{
CachedInstance ci = current;
return(ci == null || updateTimer.ElapsedMilliseconds - ci.createdAt >= ageLimitMs);
}
public static MockAuthentication Get() => CachedInstance.Copy();