/// <summary>
/// Saves the current cache to disk with the given performanc setting.
/// </summary>
/// <param name="performanceSetting">Performance setting that should match the cache contents.</param>
public void Save(EncodingOptions.Performance performanceSetting)
{
string path = GetFilePath(performanceSetting);
LogClient.Instance.Logger.Info("Saving encoding cache [{0} items] to disk at {1}", cache.Count, path);
try
{
FileInfo fInfo = new FileInfo(path);
if (!fInfo.Directory.Exists)
{
fInfo.Directory.Create();
}
using (FileStream fs = new FileStream(path, FileMode.Create))
{
using (var deflate = new DeflateStream(fs, CompressionMode.Compress))
{
// Construct a BinaryFormatter and use it to serialize the data to the stream.
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(deflate, cache);
}
}
}
catch (SerializationException e)
{
LogClient.Instance.Logger.Error("Serialization error: {0}", LogClient.GetAllExceptions(e));
}
catch (Exception ex)
{
LogClient.Instance.Logger.Error("Saving generic error: {0}", LogClient.GetAllExceptions(ex));
}
}
/// <summary>
/// Loads a cache from disk for the given performance setting.
/// </summary>
/// <param name="performanceSetting">Desired performance setting cache to load</param>
public void Load(EncodingOptions.Performance performanceSetting)
{
if (cache != null && cache.Count > 0 && performanceSetting == currentPerformance)
{
LogClient.Instance.Logger.Info("Encoding cache already loaded [{0} items]", cache.Count);
return;
}
string path = GetFilePath(performanceSetting);
LogClient.Instance.Logger.Info("Loading encoding cache from disk at {0}", path);
try
{
Clear();
if (File.Exists(path))
{
using (FileStream fs = new FileStream(path, FileMode.Open))
{
using (var deflate = new DeflateStream(fs, CompressionMode.Decompress))
{
BinaryFormatter formatter = new BinaryFormatter();
// Deserialize the cache from the file and
// assign the reference to the local variable.
if (deflate.CanSeek)
{
deflate.Seek(0, SeekOrigin.Begin);
}
cache = (Dictionary <string, EncodingCacheItem>)formatter.Deserialize(deflate);
// load up lrulist with all keys so they are insync
foreach (var key in cache.Keys)
{
lruList.AddLast(key);
}
// successful, so set now
currentPerformance = performanceSetting;
LogClient.Instance.Logger.Info("Encoding cache loaded successfully with {0} items", cache.Count);
}
}
}
}
catch (SerializationException e)
{
LogClient.Instance.Logger.Error("Deserialization error: {0}", LogClient.GetAllExceptions(e));
}
catch (Exception ex)
{
LogClient.Instance.Logger.Error("Loading generic error: {0}", LogClient.GetAllExceptions(ex));
}
}
/// <summary>
/// Gets the file path for the given performance setting.
/// </summary>
/// <param name="performanceSetting">Desired performance setting</param>
/// <returns></returns>
private static string GetFilePath(EncodingOptions.Performance performanceSetting)
{
return(Path.Combine(ApplicationPaths.CacheDirectory, string.Format("encodings_{0}.cache", performanceSetting)));
}
