/// <summary>
/// Adds an item to the cache.
/// </summary>
/// <param name="key">The key for the item.</param>
/// <param name="val">The item to add.</param>
public void Add(
string key,
object val)
{
CacheItem item = new CacheItem(val, this.GetExpireTime());
this.hash.Add(key, item);
#if (CACHE_TRACE)
LogManager.GetCurrentClassLogger().Debug(
debugMessage => debugMessage("Item Added: {0} : {1}", key, val.ToString());
#endif
}
/// <summary>
/// Updates the expire time of the given item if the cache is
/// <b>RELATIVE_EXPIRATION</b> and keep-alive is on.
/// </summary>
/// <param name="item">The <b>CacheItem</b> to update the expire time for.</param>
private void UpdateExpireTime(
CacheItem item)
{
// the item's expire time can only be updated if the cache is set
// for relative expiration and to keep items alive when used
if ((this.cacheType == CacheType.RELATIVE_EXPIRATION) && this.keepAlive) {
DateTime expireTime = this.GetExpireTime();
// see if there is a drop dead time specified
if (this.dropDeadTime != NULL_TIMESPAN) {
// calculate the drop dead time based on the time the item was added
DateTime dropDeadTime = item.AddedAt;
dropDeadTime = dropDeadTime.Add(this.dropDeadTime);
// if the drop dead time is sooner than the extended expire time,
// use the drop dead time instead
if (dropDeadTime < expireTime) {
expireTime = dropDeadTime;
}
}
// update the item's expire time
item.ExpiresAt = expireTime;
}
}
/// <summary>
/// Gets or sets the value of an item in the cache with the given key.
/// </summary>
public object this[string key]
{
get { return this.Get(key); }
set
{
CacheItem item = new CacheItem(value, this.GetExpireTime());
this.hash[key] = item;
}
}