#region
/* -----------------------------------------------------------------------
*
*
* Copyright 2011-2012 GRNET S.A. All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
*
* THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and
* documentation are those of the authors and should not be
* interpreted as representing official policies, either expressed
* or implied, of GRNET S.A.
*
* -----------------------------------------------------------------------
*/
#endregion
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Pithos.Interfaces;
using System.IO;
using System.Diagnostics;
using Pithos.Network;
namespace Pithos.Core
{
[Export(typeof(IPithosWorkflow))]
public class PithosWorkflow:IPithosWorkflow
{
[Import]
public IPithosSettings Settings { get; set; }
[Import]
public IStatusKeeper StatusKeeper { get; set; }
public FileStatus SetFileStatus(string path, FileStatus status)
{
Debug.Assert(!path.Contains(FolderConstants.CacheFolder));
Debug.Assert(!path.EndsWith(".ignore",StringComparison.InvariantCultureIgnoreCase));
if (String.IsNullOrWhiteSpace(path))
throw new ArgumentNullException("path", "The path parameter must not be emtpy");
var oldStatus=StatusKeeper.GetFileStatus(path);
if (oldStatus == status)
return oldStatus;
switch(oldStatus)
{
case FileStatus.Unchanged :
break;
case FileStatus.Created:
if (status == FileStatus.Modified)
return oldStatus;
break;
case FileStatus.Modified:
case FileStatus.Renamed:
if (status == FileStatus.Created)
return oldStatus;
break;
}
StatusKeeper.SetFileStatus(path, status);
return status;
}
public void ClearFileStatus(string path)
{
if (String.IsNullOrWhiteSpace(path))
throw new ArgumentNullException("path", "The path parameter must not be emtpy");
StatusKeeper.ClearFileStatus(path.ToLower());
}
public Task OpenStreamWithWaiting(string path)
{
if (String.IsNullOrWhiteSpace(path))
throw new ArgumentNullException("path","The path parameter must not be emtpy");
if (!File.Exists(path))
throw new FileNotFoundException("The specified file or path does not exist", path);
return new Task(() =>
{
int counter = 0;
while (true)
{
try
{
var stream=File.OpenRead(path);
return stream;
}
catch
{
Thread.Sleep(500);
if (++counter > 10)
throw;
}
}
});
}
}
}