static Cache()
{
STEM.Sys.Global.ThreadPool.BeginAsync(new ThreadStart(_TimeoutThread), TimeSpan.FromMinutes(5));
lock (Cache._CacheObjects)
{
if (Cache._CacheObjects.Count == 0)
{
if (Directory.Exists(CacheDirectory))
{
foreach (string file in Directory.GetFiles(CacheDirectory, "*.cache"))
{
try
{
SessionObject so = SessionObject.Deserialize(File.ReadAllText(file));
if (so != null)
{
_CacheObjects[so.Key.ToUpper(System.Globalization.CultureInfo.CurrentCulture)] = so;
}
}
catch { }
}
}
}
}
}
public static SessionObject Deserialize(string xml)
{
try
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);
if (doc.DocumentElement.SelectNodes("//VersionDescriptor/AssemblyName").Count == 0 ||
doc.DocumentElement.SelectNodes("//VersionDescriptor/TypeName").Count == 0)
{
throw new Exception("The VersionDescriptor tag is missing or malformed.");
}
Assembly asm = AppDomain.CurrentDomain.Load(new AssemblyName(doc.DocumentElement.SelectNodes("//VersionDescriptor/AssemblyName")[0].InnerText));
if (asm == null)
{
throw new Exception("The Assembly:" + doc.DocumentElement.SelectNodes("//VersionDescriptor/AssemblyName")[0].InnerText + " could not be located.");
}
Type tgt = asm.GetType(doc.DocumentElement.SelectNodes("//VersionDescriptor/TypeName")[0].InnerText);
if (tgt == null)
{
throw new Exception("The Type:" + doc.DocumentElement.SelectNodes("//VersionDescriptor/TypeName")[0].InnerText + " could not be located.");
}
string valueXml = doc.DocumentElement.SelectSingleNode("Value").InnerXml;
doc.DocumentElement.RemoveChild(doc.DocumentElement.SelectSingleNode("Value"));
SessionObject so = STEM.Sys.Serializable.Deserialize(doc.DocumentElement.OuterXml, typeof(SessionObject)) as SessionObject;
so._Value = STEM.Sys.Serializable.Deserialize(valueXml, tgt);
return(so);
}
catch (Exception ex)
{
STEM.Sys.EventLog.WriteEntry("SessionObject.Deserialize", ex.ToString(), STEM.Sys.EventLog.EventLogEntryType.Error);
return(null);
}
}
public object this[string key]
{
get
{
if (String.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
try
{
if (!_CacheObjects.ContainsKey(key.ToUpper(System.Globalization.CultureInfo.CurrentCulture)))
{
string file = Path.Combine(CacheDirectory, STEM.Sys.State.KeyManager.GetHash(key) + ".cache");
if (File.Exists(file))
{
try
{
SessionObject so = SessionObject.Deserialize(File.ReadAllText(file));
if (so != null)
{
_CacheObjects[so.Key.ToUpper(System.Globalization.CultureInfo.CurrentCulture)] = so;
}
}
catch { }
}
}
if (_CacheObjects.ContainsKey(key.ToUpper(System.Globalization.CultureInfo.CurrentCulture)))
{
object ret = _CacheObjects[key.ToUpper(System.Globalization.CultureInfo.CurrentCulture)].Value;
return(ret);
}
}
catch { }
return(null);
}
set
{
if (String.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
if (value == null)
{
lock (_CacheObjects)
_CacheObjects.Remove(key.ToUpper(System.Globalization.CultureInfo.CurrentCulture));
try
{
if (File.Exists(Path.Combine(CacheDirectory, STEM.Sys.State.KeyManager.GetHash(key) + ".cache")))
{
File.Delete(Path.Combine(CacheDirectory, STEM.Sys.State.KeyManager.GetHash(key) + ".cache"));
}
}
catch { }
}
else
{
lock (_CacheObjects)
_CacheObjects[key.ToUpper(System.Globalization.CultureInfo.CurrentCulture)] = new SessionObject(key, value);
try
{
File.WriteAllText(Path.Combine(CacheDirectory, STEM.Sys.State.KeyManager.GetHash(key) + ".cache"), _CacheObjects[key.ToUpper(System.Globalization.CultureInfo.CurrentCulture)].Serialize());
}
catch (Exception ex)
{
STEM.Sys.EventLog.WriteEntry("STEM.Sys.State.Cache", new Exception("Failed to write cache file for key (" + key + ")", ex));
}
}
}
}
