/// <summary>
/// Handles the background cache maintenance.
/// </summary>
/// <param name="ar">The <see cref="IAsyncResult" />.</param>
private static void OnCacheTimer(IAsyncResult ar)
{
AsyncTimer.EndTimer(ar);
try
{
lock (cache)
{
// Handle expired cache entries
List <MD5Key> delList = new List <MD5Key>();
DateTime now = SysTime.Now;
foreach (MD5Key key in cache.Keys)
{
var entry = cache[key];
if (entry.TTD <= now)
{
// Expired
delList.Add(key);
LogCachedEntry(entry);
}
}
foreach (MD5Key key in delList)
{
cache.Remove(key);
}
}
}
finally
{
AsyncTimer.BeginTimer(TimeSpan.FromMinutes(1), onTimer, null);
}
}