/// <summary>
/// Deletes the item from the cache identified by it's <see cref="ICache.Id" />
/// </summary>
/// <param name="cacheId">The unique id of the cache to remove item from </param>
/// <param name="key">The key associated with the cached item to be removed</param>
/// <returns>True if a cache was found matching the id supplied</returns>
/// <remarks>
/// <c>true</c> will be returned even if the item was not in the cache
/// </remarks>
/// <exception cref="ArgumentException">Cache is paused</exception>
public bool RemoveItem(CacheIdentity cacheId, string key)
{
ICache cache = AllCaches.SingleOrDefault(c => c.Id == cacheId);
if (cache == null)
{
return(false);
}
if (cache.As <IPausableCache>() != null && cache.As <IPausableCache>().IsPaused)
{
throw new ArgumentException(string.Format("Cannot remove item from paused cache ('{0}')", cacheId));
}
cache.Remove(key);
return(true);
}
private static void LoadLocalCaches(string directoryPath)
{
string cachePath;
cachePath = Path.Combine(directoryPath, ".nlyric");
if (File.Exists(cachePath))
{
_allCaches = JsonConvert.DeserializeObject <AllCaches>(File.ReadAllText(cachePath));
Logger.Instance.LogInfo($"搜索缓存\"{cachePath}\"已被加载。");
}
else
{
_allCaches = new AllCaches()
{
AlbumCaches = new List <AlbumCache>(),
LyricCaches = new List <LyricCache>(),
TrackCaches = new List <TrackCache>()
}
};
}
/// <summary>
/// Register the <paramref name="cache"/>
/// </summary>
/// <exception cref="ArgumentException">
/// <returns>The <paramref name="cache"/> extended with <see cref="IStatisticsCache"/> behaviour</returns>
/// Where a cache with the same <see cref="ICache.Id"/> has already been registered</exception>
/// <remarks>
/// Any cache registered will be extended with the <see cref="IStatisticsCache"/> behaviour if not already
/// </remarks>
public virtual ICache Register(ICache cache)
{
if (cache == null)
{
throw new ArgumentNullException("cache");
}
//don't add special case null instances
if (cache.As <INullCache>() != null)
{
return(cache);
}
if (AllCaches.Any(c => c.Id == cache.Id))
{
throw new ArgumentException(string.Format("A cache has already been registered with the Id '{0}'",
cache.Id));
}
bool hasExistingStatisticsDecorator = cache.IsDecoratedWith <IStatisticsCache>();
cache = DecorateWithStatistics(cache);
_allCaches[cache] = !hasExistingStatisticsDecorator;
return(cache);
}
static DispatcherContext()
{
AllCaches.Init();
}
public void SaveCaches()
{
AllCaches.SaveChanges();
}
