/// <summary>
/// Initialize the cache.
/// </summary>
/// <param name="capacity">Maximum number of entries.</param>
/// <param name="evictCount">Number to evict when capacity is reached.</param>
/// <param name="persistence">Persistence driver.</param>
/// <param name="prepopulate">If using persistence, prepopulate from existing items.</param>
public LRUCache(int capacity, int evictCount, PersistenceDriver persistence = null, bool prepopulate = true)
{
if (capacity < 1)
{
throw new ArgumentOutOfRangeException(nameof(capacity));
}
if (evictCount < 1)
{
throw new ArgumentOutOfRangeException(nameof(evictCount));
}
if (evictCount > capacity)
{
throw new ArgumentOutOfRangeException(nameof(evictCount));
}
if (persistence != null)
{
if (typeof(T1) != typeof(string))
{
throw new InvalidOperationException("Persistence can only be used when the cache key is of type 'string'.");
}
}
_Capacity = capacity;
_EvictCount = evictCount;
_Cache = new Dictionary <T1, DataNode <T2> >();
_Persistence = persistence;
if (persistence != null && prepopulate)
{
Prepopulate();
}
}
/// <summary>
/// Dispose of the object. Do not use after disposal.
/// </summary>
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
lock (_CacheLock)
{
_Cache = null;
}
_Capacity = 0;
_EvictCount = 0;
_Events?.Disposed?.Invoke(this, EventArgs.Empty);
_Events = null;
_Persistence = null;
}
}