/// <summary>
/// Add a new keyed object to the cache.
/// </summary>
/// <param name="key">The key of the object.</param>
/// <param name="value">The object to add.</param>
/// <param name="scavengingPriority">One of the <see cref="CacheItemPriority"/> values.</param>
/// <param name="refreshAction">An <see cref="ICacheItemRefreshAction"/> object.</param>
/// <param name="expirations">An array of <see cref="ICacheItemExpiration"/> objects.</param>
public void Add(string key, object value, CacheItemPriority scavengingPriority, ICacheItemRefreshAction refreshAction, params ICacheItemExpiration[] expirations)
{
ValidateKey(key);
CacheItem cacheItemBeforeLock = null;
bool lockWasSuccessful = false;
do
{
lock (inMemoryCache.SyncRoot)
{
if (inMemoryCache.Contains(key) == false)
{
cacheItemBeforeLock = new CacheItem(key, addInProgressFlag, CacheItemPriority.NotRemovable, null);
inMemoryCache[key] = cacheItemBeforeLock;
}
else
{
cacheItemBeforeLock = (CacheItem)inMemoryCache[key];
}
lockWasSuccessful = Monitor.TryEnter(cacheItemBeforeLock);
}
if (lockWasSuccessful == false)
{
Thread.Sleep(0);
}
} while (lockWasSuccessful == false);
try
{
cacheItemBeforeLock.TouchedByUserAction(true);
CacheItem newCacheItem = new CacheItem(key, value, scavengingPriority, refreshAction, expirations);
try
{
backingStore.Add(newCacheItem);
cacheItemBeforeLock.Replace(value, refreshAction, scavengingPriority, expirations);
inMemoryCache[key] = cacheItemBeforeLock;
}
catch
{
backingStore.Remove(key);
inMemoryCache.Remove(key);
throw;
}
instrumentationProvider.FireCacheUpdated(1, inMemoryCache.Count);
}
finally
{
Monitor.Exit(cacheItemBeforeLock);
}
}
public void Add(string key, object value, CacheItemPriority scavengingPriority, ICacheItemRefreshAction refreshAction, params ICacheItemExpiration[] expirations)
{
ValidateKey(key);
EnsureCacheInitialized();
CacheItem cacheItemBeforeLock = null;
bool lockWasSuccessful = false;
do
{
lock (inMemoryCache.SyncRoot)
{
if (inMemoryCache.Contains(key) == false)
{
cacheItemBeforeLock = new CacheItem(key, addInProgressFlag, CacheItemPriority.NotRemovable, null);
inMemoryCache[key] = cacheItemBeforeLock;
}
else
{
cacheItemBeforeLock = (CacheItem)inMemoryCache[key];
}
lockWasSuccessful = Monitor.TryEnter(cacheItemBeforeLock);
}
if (lockWasSuccessful == false)
{
Thread.Sleep(0);
}
} while (lockWasSuccessful == false);
try
{
cacheItemBeforeLock.TouchedByUserAction(true);
CacheItem newCacheItem = new CacheItem(key, value, scavengingPriority, refreshAction, expirations);
try
{
backingStore.Add(newCacheItem);
cacheItemBeforeLock.Replace(value, refreshAction, scavengingPriority, expirations);
inMemoryCache[key] = cacheItemBeforeLock;
}
catch
{
backingStore.Remove(key);
inMemoryCache.Remove(key);
throw;
}
if (scavengingPolicy.IsScavengingNeeded(inMemoryCache.Count))
{
cacheScavenger.StartScavenging();
}
CachingServiceItemTurnoverEvent.FireAddItems(1);
CachingServiceItemTurnoverEvent.SetItemsTotal(inMemoryCache.Count);
}
finally
{
Monitor.Exit(cacheItemBeforeLock);
}
}