/// <summary>Constructor</summary>
/// <param name="capacity">the normal item limit for cache (Count may exeed capacity due to minAge)</param>
/// <param name="minAge">the minimium time after an access before an item becomes eligible for removal, during this time
/// the item is protected and will not be removed from cache even if over capacity</param>
/// <param name="maxAge">the max time that an object will sit in the cache without being accessed, before being removed</param>
/// <param name="isValid">delegate used to determine if cache is out of date. Called before index access not more than once per 10 seconds</param>
public LRUCache(int capacity, TimeSpan minAge, TimeSpan maxAge, Func <bool> isValid = null)
{
_capacity = capacity;
_lifeSpan = new LifespanMgr(this, minAge, maxAge);
_indexList = new List <IIndex>();
_isValid = isValid;
}
/// <summary>constructor</summary>
public Node(LifespanMgr mgr, ItemType value)
{
_mgr = mgr;
Value = value;
Interlocked.Increment(ref _mgr._owner._curCount);
Touch();
}
/// <summary>Constructor</summary>
/// <param name="capacity">the normal item limit for cache (Count may exeed capacity due to minAge)</param>
/// <param name="minAge">the minimium time after an access before an item becomes eligible for removal, during this time
/// the item is protected and will not be removed from cache even if over capacity</param>
/// <param name="maxAge">the max time that an object will sit in the cache without being accessed, before being removed</param>
/// <param name="isValid">delegate used to determine if cache is out of date. Called before index access not more than once per 10 seconds</param>
public LruItemCache(int capacity, TimeSpan minAge, TimeSpan maxAge, IsValidFunc isValid)
{
if (capacity <= 0)
{
throw new ArgumentException("capacity MUST > 0");
}
_capacity = capacity;
_isValid = isValid;
_lifeSpan = new LifespanMgr(this, minAge, maxAge);
}
/// <summary>Constructor</summary>
/// <param name="capacity">the normal item limit for cache (Count may exeed capacity due to minAge)</param>
/// <param name="minAge">the minimium time after an access before an item becomes eligible for removal, during this time
/// the item is protected and will not be removed from cache even if over capacity</param>
/// <param name="maxAge">the max time that an object will sit in the cache without being accessed, before being removed</param>
/// <param name="isValid">delegate used to determine if cache is out of date. Called before index access not more than once per 10 seconds</param>
public LruCache(int capacity, TimeSpan minAge, TimeSpan maxAge, IsValid isValid)
{
_capacity = capacity;
_isValid = isValid;
_lifeSpan = new LifespanMgr(this, minAge, maxAge);
}
