Beispiel #1
0
        /// <summary>
        /// Lookup an item from the metadata cache for a given service type.
        /// </summary>
        /// <param name="serviceType">Service type for which we want to lookup metadata.</param>
        /// <returns>MetadataCacheItem for the service type. Null if there is no item in the cache for the given service type.</returns>
        internal static MetadataCacheItem TryLookup(Type serviceType)
        {
            MetadataCacheItem item;

            var key = new MetadataCacheKey(serviceType);

            _cache.TryGetValue(key, out item);

            return(item);
        }
Beispiel #2
0
        /// <summary>
        /// Add an MetadataCacheItem object to the cache for a given service.
        /// </summary>
        /// <param name="serviceType">Type of the service class</param>
        /// <param name="item">Item to be added to the cache</param>
        /// <returns>Item that was added to the cache</returns>
        internal static MetadataCacheItem AddCacheItem(Type serviceType, MetadataCacheItem item)
        {
            MetadataCacheItem item2;

            var key = new MetadataCacheKey(serviceType);

            // Use a double check lock for concurrency.
            if (!_cache.TryGetValue(key, out item2))
            {
                lock (_lockObject)
                {
                    if (!_cache.TryGetValue(key, out item2))
                    {
                        _cache.Add(key, item);

                        item2 = item;
                    }
                }
            }

            return(item2);
        }