protected override void ExitLock()
{
if (CacheLock.IsReadLockHeld)
{
CacheLock.ExitReadLock();
}
}
/// <summary>
/// Count all cached values
/// </summary>
/// <returns></returns>
public int Count()
{
CacheLock.EnterReadLock();
try {
return(Cache.Count);
} finally {
CacheLock.ExitReadLock();
}
}
/// <summary>
/// Try to get cached value
/// Return false if no exist value or exist value expired
/// </summary>
/// <param name="key">Cache key</param>
/// <param name="value">Cache value</param>
/// <returns></returns>
public bool TryGetValue(TKey key, out TValue value)
{
RevokeExpires();
var now = DateTime.UtcNow;
CacheLock.EnterReadLock();
try {
Pair <TValue, DateTime> pair;
if (Cache.TryGetValue(key, out pair) && pair.Second > now)
{
value = pair.First;
return(true);
}
else
{
value = default(TValue);
return(false);
}
} finally {
CacheLock.ExitReadLock();
}
}