/// <summary>
/// Persists the data back to the filesystem
/// </summary>
public virtual void Save()
{
lock (SyncRoot)
{
if (!this.IsEmpty)
{
string file = this.DirectWrite ? _file : Path.GetTempFileName();
var value = _value;
using (var scope = new FileLockScope(file))
{
try
{
FileMode mode = File.Exists(file) ? FileMode.Truncate : FileMode.OpenOrCreate;
using (FileStream stream = File.Open(file, mode, FileAccess.Write, FileShare.ReadWrite))
{
_serializer.Serialize((Stream)stream, value);
}
if (!this.DirectWrite)
{
File.Copy(file, _file, true);
File.Delete(file);
}
}
catch (Exception ex)
{
throw new Exception(string.Format("Fail to save persitable object to file {0}.", file), ex);
}
}
}
}
}
/// <summary>
/// Loads the data from the filesystem. For deserialization an XmlSeralizer is used.
/// </summary>
public virtual void Load()
{
lock (SyncRoot)
{
string file = this._file;
using (var scope = new FileLockScope(file))
{
try
{
if (System.IO.File.Exists(file))
{
using (FileStream reader = File.Open(file, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
_value = (T)_serializer.Deserialize(reader);
}
}
AddFileNotifier();
}
catch (Exception ex)
{
throw new Exception(string.Format("Fail to load persitable object from file {0}.", file), ex);
}
}
}
}
/// <summary>
/// Loads the data from the file system. For deserialization an XmlSeralizer is used.
/// </summary>
public virtual void Load()
{
try
{
using (var scope = new FileLockScope(_file))
{
if (File.Exists(_file))
{
using (FileStream reader = File.Open(_file, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
_value = (T)_serializer.Deserialize(reader);
}
}
AddFileNotifier();
}
}
catch (Exception ex)
{
throw new Exception(string.Format(Messages.LoadFailed, _file), ex);
}
}
/// <summary>
/// Deletes the data from the cache and filesystem
/// </summary>
/// <returns></returns>
public virtual bool Delete()
{
bool success = false;
using (var scope = new FileLockScope(this._file))
{
if (File.Exists(this._file))
{
for (int i = 1; i < 4; i++)
{
try
{
File.Delete(this._file);
success = true;
}
catch
{
Thread.Sleep(50 * i);
}
}
}
}
return(success);
}
/// <summary>
/// Deletes the data from the cache and file system
/// </summary>
/// <returns></returns>
public virtual bool Delete()
{
if (File.Exists(_file))
{
using (var scope = new FileLockScope(_file))
{
// loop just in case of any file locks while deleting
for (int i = 1; i < 4; i++)
{
try
{
File.Delete(_file);
return(true);
}
catch
{
Thread.Sleep(50 * i);
}
}
}
}
return(false);
}
