private static void removedCallback(string key, Object value, CacheItemRemovedReason reason)
{
if (reason == CacheItemRemovedReason.Expired)
{
NoteRoll obj = (NoteRoll)value;
// insertNew(key); // Not needed to keep it always in memory.
}
}
private static NoteRoll insertNew(string room_name)
{
NoteRoll obj = new NoteRoll(room_name); // if concurrency happens, this will be done more than once.
HttpRuntime.Cache.Insert(key(room_name), obj, null, DateTime.Now.AddSeconds(Config.DEFAULT_CACHE_SECONDS),
Cache.NoSlidingExpiration, CacheItemPriority.Default, removedCallback);
// expires after some time for multi-node synchronization (unreliable).
return(obj);
}
public static void AddNote(string room_name, NoteInfo info)
{
NoteStore.AddNote(room_name, info);
NoteRoll obj = (NoteRoll)HttpRuntime.Cache.Get(key(room_name));
if (obj != null)
{
obj.AddNote(info);
}
}
private static NoteRoll get(string room_name)
{
NoteRoll obj = (NoteRoll)HttpRuntime.Cache.Get(key(room_name));
if (obj == null)
{
obj = insertNew(room_name);
}
return(obj);
}
public static IEnumerable <NoteInfo> Get(string room_name)
{
NoteRoll roll = get(room_name);
return(roll.Get());
}