public object Get(string key)
{
if (string.IsNullOrEmpty(key))
{
throw new ArgumentException("参数[key]不能为空或空字符串");
}
CacheItem cacheItem = (CacheItem)inMemoryCache[key];
if (cacheItem == null)
{
return(null);
}
lock (inMemoryCache.SyncRoot)
{
if (cacheItem.HasExpired())
{
cacheItem.TouchedByUserAction(true);
inMemoryCache.Remove(key);
return(null);
}
}
cacheItem.TouchedByUserAction(false);
return(cacheItem.Value);
}
public void Clear()
{
RestartFlushAlgorithm:
lock (inMemoryCache.SyncRoot)
{
foreach (string key in inMemoryCache.Keys)
{
bool lockWasSuccessful = false;
CacheItem itemToRemove = (CacheItem)inMemoryCache[key];
try
{
if (lockWasSuccessful = Monitor.TryEnter(itemToRemove))
{
itemToRemove.TouchedByUserAction(true);
}
else
{
goto RestartFlushAlgorithm;
}
}
finally
{
if (lockWasSuccessful)
{
Monitor.Exit(itemToRemove);
}
}
}
inMemoryCache.Clear();
}
}
