2 /* -----------------------------------------------------------------------
3 * <copyright file="StatusAgent.cs" company="GRNet">
5 * Copyright 2011-2012 GRNET S.A. All rights reserved.
7 * Redistribution and use in source and binary forms, with or
8 * without modification, are permitted provided that the following
11 * 1. Redistributions of source code must retain the above
12 * copyright notice, this list of conditions and the following
15 * 2. Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer in the documentation and/or other materials
18 * provided with the distribution.
21 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
34 * The views and conclusions contained in the software and
35 * documentation are those of the authors and should not be
36 * interpreted as representing official policies, either expressed
37 * or implied, of GRNET S.A.
39 * -----------------------------------------------------------------------
43 using System.Collections.Generic;
44 using System.ComponentModel.Composition;
45 using System.Data.SQLite;
46 using System.Diagnostics;
47 using System.Diagnostics.Contracts;
50 using System.Reflection;
51 using System.Security.Cryptography;
53 using System.Threading;
54 using System.Threading.Tasks;
55 using Castle.ActiveRecord;
56 using Castle.ActiveRecord.Framework;
57 using Castle.ActiveRecord.Framework.Config;
58 using NHibernate.ByteCode.Castle;
60 using NHibernate.Cfg.Loquacious;
61 using NHibernate.Dialect;
62 using Pithos.Interfaces;
65 using Environment = System.Environment;
67 namespace Pithos.Core.Agents
69 [Export(typeof(IStatusChecker)),Export(typeof(IStatusKeeper))]
70 public class StatusAgent:IStatusChecker,IStatusKeeper
72 private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
74 [System.ComponentModel.Composition.Import]
75 public IPithosSettings Settings { get; set; }
77 private Agent<Action> _persistenceAgent;
83 var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
85 _pithosDataPath = Path.Combine(appDataPath , "GRNET\\PITHOS");
86 if (!Directory.Exists(_pithosDataPath))
87 Directory.CreateDirectory(_pithosDataPath);
89 var dbPath = Path.Combine(_pithosDataPath, "pithos.db");
91 MigrateOldDb(dbPath, appDataPath);
94 var source = GetConfiguration(_pithosDataPath);
95 ActiveRecordStarter.Initialize(source,typeof(FileState),typeof(FileTag));
97 ActiveRecordStarter.UpdateSchema();
100 if (!File.Exists(dbPath))
101 ActiveRecordStarter.CreateSchema();
108 private static void MigrateOldDb(string dbPath, string appDataPath)
110 if(String.IsNullOrWhiteSpace(dbPath))
111 throw new ArgumentNullException("dbPath");
112 if(String.IsNullOrWhiteSpace(appDataPath))
113 throw new ArgumentNullException("appDataPath");
114 Contract.EndContractBlock();
116 var oldDbPath = Path.Combine(appDataPath, "Pithos", "pithos.db");
117 var oldDbInfo = new FileInfo(oldDbPath);
118 if (oldDbInfo.Exists && !File.Exists(dbPath))
120 Log.InfoFormat("Moving database from {0} to {1}",oldDbInfo.FullName,dbPath);
121 var oldDirectory = oldDbInfo.Directory;
122 oldDbInfo.MoveTo(dbPath);
124 if (Log.IsDebugEnabled)
125 Log.DebugFormat("Deleting {0}",oldDirectory.FullName);
127 oldDirectory.Delete(true);
131 private void CreateTrigger()
133 using (var connection = GetConnection())
134 using (var triggerCommand = connection.CreateCommand())
136 var cmdText = new StringBuilder()
137 .AppendLine("CREATE TRIGGER IF NOT EXISTS update_last_modified UPDATE ON FileState FOR EACH ROW")
139 .AppendLine("UPDATE FileState SET Modified=datetime('now') WHERE Id=old.Id;")
141 .AppendLine("CREATE TRIGGER IF NOT EXISTS insert_last_modified INSERT ON FileState FOR EACH ROW")
143 .AppendLine("UPDATE FileState SET Modified=datetime('now') WHERE Id=new.Id;")
146 triggerCommand.CommandText = cmdText;
147 triggerCommand.ExecuteNonQuery();
152 private static InPlaceConfigurationSource GetConfiguration(string pithosDbPath)
154 if (String.IsNullOrWhiteSpace(pithosDbPath))
155 throw new ArgumentNullException("pithosDbPath");
156 if (!Path.IsPathRooted(pithosDbPath))
157 throw new ArgumentException("path must be a rooted path", "pithosDbPath");
158 Contract.EndContractBlock();
160 var properties = new Dictionary<string, string>
162 {"connection.driver_class", "NHibernate.Driver.SQLite20Driver"},
163 {"dialect", "NHibernate.Dialect.SQLiteDialect"},
164 {"connection.provider", "NHibernate.Connection.DriverConnectionProvider"},
166 "proxyfactory.factory_class",
167 "NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle"
171 var connectionString = String.Format(@"Data Source={0}\pithos.db;Version=3;Enlist=N", pithosDbPath);
172 properties.Add("connection.connection_string", connectionString);
174 var source = new InPlaceConfigurationSource();
175 source.Add(typeof (ActiveRecordBase), properties);
176 source.SetDebugFlag(false);
180 public void StartProcessing(CancellationToken token)
182 _persistenceAgent = Agent<Action>.Start(queue =>
187 var job = queue.Receive();
188 job.ContinueWith(t =>
190 var action = job.Result;
195 catch (SQLiteException ex)
197 Log.ErrorFormat("[ERROR] SQL \n{0}", ex);
201 Log.ErrorFormat("[ERROR] STATE \n{0}", ex);
203 queue.NotifyComplete(action);
204 // ReSharper disable AccessToModifiedClosure
206 // ReSharper restore AccessToModifiedClosure
218 _persistenceAgent.Stop();
222 public void ProcessExistingFiles(IEnumerable<FileInfo> existingFiles)
224 if(existingFiles ==null)
225 throw new ArgumentNullException("existingFiles");
226 Contract.EndContractBlock();
228 //Find new or matching files with a left join to the stored states
229 var fileStates = FileState.Queryable;
230 var currentFiles=from file in existingFiles
231 join state in fileStates on file.FullName.ToLower() equals state.FilePath.ToLower() into gs
232 from substate in gs.DefaultIfEmpty()
233 select new {File = file, State = substate};
235 //To get the deleted files we must get the states that have no corresponding
237 //We can't use the File.Exists method inside a query, so we get all file paths from the states
238 var statePaths = (from state in fileStates
239 select new {state.Id, state.FilePath}).ToList();
241 var missingStates= (from path in statePaths
242 where !File.Exists(path.FilePath) && !Directory.Exists(path.FilePath)
243 select path.Id).ToList();
244 //Finally, retrieve the states that correspond to the deleted files
245 var deletedFiles = from state in fileStates
246 where missingStates.Contains(state.Id)
247 select new { File = default(FileInfo), State = state };
249 var pairs = currentFiles.Union(deletedFiles).ToList();
251 using (var shortHasher = HashAlgorithm.Create("sha1"))
253 foreach (var pair in pairs)
255 var fileState = pair.State;
256 var file = pair.File;
257 if (fileState == null)
260 var createState = FileState.CreateFor(file);
261 _persistenceAgent.Post(createState.Create);
263 else if (file == null)
265 //This file was deleted while we were down. We should mark it as deleted
266 //We have to go through UpdateStatus here because the state object we are using
267 //was created by a different ORM session.
268 _persistenceAgent.Post(() => UpdateStatusDirect(fileState.Id, FileStatus.Deleted));
272 //This file has a matching state. Need to check for possible changes
273 //To check for changes, we use the cheap (in CPU terms) SHA1 algorithm
274 //on the entire file.
276 var hashString = file.ComputeShortHash(shortHasher);
277 //TODO: Need a way to attach the hashes to the filestate so we don't
278 //recalculate them each time a call to calculate has is made
279 //We can either store them to the filestate or add them to a
282 //If the hashes don't match the file was changed
283 if (fileState.ShortHash != hashString)
285 _persistenceAgent.Post(() => UpdateStatusDirect(fileState.Id, FileStatus.Modified));
296 private int UpdateStatusDirect(Guid id, FileStatus status)
298 using (log4net.ThreadContext.Stacks["StatusAgent"].Push("UpdateStatusDirect"))
304 using (var connection = GetConnection())
306 var command = new SQLiteCommand("update FileState set FileStatus= :fileStatus where Id = :id ",
309 command.Parameters.AddWithValue("fileStatus", status);
311 command.Parameters.AddWithValue("id", id);
313 var affected = command.ExecuteNonQuery();
319 catch (Exception exc)
321 Log.Error(exc.ToString());
327 private int UpdateStatusDirect(string path, FileStatus status)
329 using (log4net.ThreadContext.Stacks["StatusAgent"].Push("UpdateStatusDirect"))
336 using (var connection = GetConnection())
339 new SQLiteCommand("update FileState set FileStatus= :fileStatus where FilePath = :path COLLATE NOCASE",
344 command.Parameters.AddWithValue("fileStatus", status);
346 command.Parameters.AddWithValue("path", path);
348 var affected = command.ExecuteNonQuery();
352 catch (Exception exc)
354 Log.Error(exc.ToString());
360 private int UpdateStatusDirect(string absolutePath, FileStatus fileStatus, FileOverlayStatus overlayStatus)
362 using (log4net.ThreadContext.Stacks["StatusAgent"].Push("UpdateStatusDirect"))
369 using (var connection = GetConnection())
373 "update FileState set OverlayStatus= :overlayStatus, FileStatus= :fileStatus where FilePath = :path COLLATE NOCASE ",
377 command.Parameters.AddWithValue("path", absolutePath);
378 command.Parameters.AddWithValue("fileStatus", fileStatus);
379 command.Parameters.AddWithValue("overlayStatus", overlayStatus);
381 var affected = command.ExecuteNonQuery();
385 catch (Exception exc)
387 Log.Error(exc.ToString());
395 public string BlockHash { get; set; }
397 public int BlockSize { get; set; }
398 public void ChangeRoots(string oldPath, string newPath)
400 if (String.IsNullOrWhiteSpace(oldPath))
401 throw new ArgumentNullException("oldPath");
402 if (!Path.IsPathRooted(oldPath))
403 throw new ArgumentException("oldPath must be an absolute path", "oldPath");
404 if (string.IsNullOrWhiteSpace(newPath))
405 throw new ArgumentNullException("newPath");
406 if (!Path.IsPathRooted(newPath))
407 throw new ArgumentException("newPath must be an absolute path", "newPath");
408 Contract.EndContractBlock();
410 FileState.ChangeRootPath(oldPath,newPath);
416 private readonly string _pithosDataPath;
419 public FileState GetStateByFilePath(string path)
421 if (String.IsNullOrWhiteSpace(path))
422 throw new ArgumentNullException("path");
423 if (!Path.IsPathRooted(path))
424 throw new ArgumentException("The path must be rooted", "path");
425 Contract.EndContractBlock();
430 using (var connection = GetConnection())
431 using (var command = new SQLiteCommand("select Id, FilePath, OverlayStatus,FileStatus ,Checksum ,ShortHash,Version ,VersionTimeStamp,IsShared ,SharedBy ,ShareWrite from FileState where FilePath=:path COLLATE NOCASE", connection))
434 command.Parameters.AddWithValue("path", path);
436 using (var reader = command.ExecuteReader())
440 //var values = new object[reader.FieldCount];
441 //reader.GetValues(values);
442 var state = new FileState
444 Id = reader.GetGuid(0),
445 FilePath = reader.IsDBNull(1)?"":reader.GetString(1),
446 OverlayStatus =reader.IsDBNull(2)?FileOverlayStatus.Unversioned: (FileOverlayStatus) reader.GetInt64(2),
447 FileStatus = reader.IsDBNull(3)?FileStatus.Missing:(FileStatus) reader.GetInt64(3),
448 Checksum = reader.IsDBNull(4)?"":reader.GetString(4),
449 ShortHash= reader.IsDBNull(5)?"":reader.GetString(5),
450 Version = reader.IsDBNull(6)?default(long):reader.GetInt64(6),
451 VersionTimeStamp = reader.IsDBNull(7)?default(DateTime):reader.GetDateTime(7),
452 IsShared = !reader.IsDBNull(8) && reader.GetBoolean(8),
453 SharedBy = reader.IsDBNull(9)?"":reader.GetString(9),
454 ShareWrite = !reader.IsDBNull(10) && reader.GetBoolean(10)
457 var state = new FileState
459 Id = (Guid) values[0],
460 FilePath = (string) values[1],
461 OverlayStatus = (FileOverlayStatus) (long)values[2],
462 FileStatus = (FileStatus) (long)values[3],
463 Checksum = (string) values[4],
464 Version = (long?) values[5],
465 VersionTimeStamp = (DateTime?) values[6],
466 IsShared = (long)values[7] == 1,
467 SharedBy = (string) values[8],
468 ShareWrite = (long)values[9] == 1
481 catch (Exception exc)
483 Log.ErrorFormat(exc.ToString());
488 public FileOverlayStatus GetFileOverlayStatus(string path)
490 if (String.IsNullOrWhiteSpace(path))
491 throw new ArgumentNullException("path");
492 if (!Path.IsPathRooted(path))
493 throw new ArgumentException("The path must be rooted", "path");
494 Contract.EndContractBlock();
499 using (var connection = GetConnection())
500 using (var command = new SQLiteCommand("select OverlayStatus from FileState where FilePath=:path COLLATE NOCASE", connection))
503 command.Parameters.AddWithValue("path", path);
505 var s = command.ExecuteScalar();
506 return (FileOverlayStatus) Convert.ToInt32(s);
509 catch (Exception exc)
511 Log.ErrorFormat(exc.ToString());
512 return FileOverlayStatus.Unversioned;
516 private string GetConnectionString()
518 var connectionString = String.Format(@"Data Source={0}\pithos.db;Version=3;Enlist=N;Pooling=True", _pithosDataPath);
519 return connectionString;
522 private SQLiteConnection GetConnection()
524 var connectionString = GetConnectionString();
525 var connection = new SQLiteConnection(connectionString);
527 using(var cmd =connection.CreateCommand())
529 cmd.CommandText = "PRAGMA journal_mode=WAL";
530 cmd.ExecuteNonQuery();
535 /* public void SetFileOverlayStatus(string path, FileOverlayStatus overlayStatus)
537 if (String.IsNullOrWhiteSpace(path))
538 throw new ArgumentNullException("path");
539 if (!Path.IsPathRooted(path))
540 throw new ArgumentException("The path must be rooted","path");
541 Contract.EndContractBlock();
543 _persistenceAgent.Post(() => FileState.StoreOverlayStatus(path,overlayStatus));
546 public Task SetFileOverlayStatus(string path, FileOverlayStatus overlayStatus, string shortHash = null)
548 if (String.IsNullOrWhiteSpace(path))
549 throw new ArgumentNullException("path");
550 if (!Path.IsPathRooted(path))
551 throw new ArgumentException("The path must be rooted","path");
552 Contract.EndContractBlock();
554 return _persistenceAgent.PostAndAwait(() => FileState.StoreOverlayStatus(path,overlayStatus,shortHash));
557 /* public void RenameFileOverlayStatus(string oldPath, string newPath)
559 if (String.IsNullOrWhiteSpace(oldPath))
560 throw new ArgumentNullException("oldPath");
561 if (!Path.IsPathRooted(oldPath))
562 throw new ArgumentException("The oldPath must be rooted", "oldPath");
563 if (String.IsNullOrWhiteSpace(newPath))
564 throw new ArgumentNullException("newPath");
565 if (!Path.IsPathRooted(newPath))
566 throw new ArgumentException("The newPath must be rooted", "newPath");
567 Contract.EndContractBlock();
569 _persistenceAgent.Post(() =>FileState.RenameState(oldPath, newPath));
572 public void SetFileState(string path, FileStatus fileStatus, FileOverlayStatus overlayStatus)
574 if (String.IsNullOrWhiteSpace(path))
575 throw new ArgumentNullException("path");
576 if (!Path.IsPathRooted(path))
577 throw new ArgumentException("The path must be rooted", "path");
578 Contract.EndContractBlock();
580 Debug.Assert(!path.Contains(FolderConstants.CacheFolder));
581 Debug.Assert(!path.EndsWith(".ignore"));
583 _persistenceAgent.Post(() => UpdateStatusDirect(path, fileStatus, overlayStatus));
587 public void StoreInfo(string path,ObjectInfo objectInfo)
589 if (String.IsNullOrWhiteSpace(path))
590 throw new ArgumentNullException("path");
591 if (!Path.IsPathRooted(path))
592 throw new ArgumentException("The path must be rooted", "path");
593 if (objectInfo == null)
594 throw new ArgumentNullException("objectInfo", "objectInfo can't be empty");
595 Contract.EndContractBlock();
597 _persistenceAgent.Post(() =>
599 var filePath = path.ToLower();
600 //Load the existing files state and set its properties in one session
601 using (new SessionScope())
603 //Forgetting to use a sessionscope results in two sessions being created, one by
604 //FirstOrDefault and one by Save()
605 var state =FileState.FindByFilePath(filePath);
607 //Create a new empty state object if this is a new file
608 state = state ?? new FileState();
610 state.FilePath = filePath;
611 state.Checksum = objectInfo.Hash;
612 state.Version = objectInfo.Version;
613 state.VersionTimeStamp = objectInfo.VersionTimestamp;
615 state.FileStatus = FileStatus.Unchanged;
616 state.OverlayStatus = FileOverlayStatus.Normal;
627 public void StoreInfo(string path, ObjectInfo objectInfo)
629 if (String.IsNullOrWhiteSpace(path))
630 throw new ArgumentNullException("path");
631 if (!Path.IsPathRooted(path))
632 throw new ArgumentException("The path must be rooted", "path");
633 if (objectInfo == null)
634 throw new ArgumentNullException("objectInfo", "objectInfo can't be empty");
635 Contract.EndContractBlock();
637 _persistenceAgent.Post(() => StoreInfoDirect(path, objectInfo));
641 private void StoreInfoDirect(string path, ObjectInfo objectInfo)
646 using (var connection = GetConnection())
647 using (var command = new SQLiteCommand(connection))
649 if (StateExists(path, connection))
650 command.CommandText =
651 "update FileState set FileStatus= :fileStatus where FilePath = :path COLLATE NOCASE ";
654 command.CommandText =
655 "INSERT INTO FileState (Id,FilePath,Checksum,Version,VersionTimeStamp,ShortHash,FileStatus,OverlayStatus) VALUES (:id,:path,:checksum,:version,:versionTimeStamp,:shortHash,:fileStatus,:overlayStatus)";
656 command.Parameters.AddWithValue("id", Guid.NewGuid());
659 command.Parameters.AddWithValue("path", path);
660 command.Parameters.AddWithValue("checksum", objectInfo.Hash);
661 command.Parameters.AddWithValue("shortHash", "");
662 command.Parameters.AddWithValue("version", objectInfo.Version);
663 command.Parameters.AddWithValue("versionTimeStamp",
664 objectInfo.VersionTimestamp);
665 command.Parameters.AddWithValue("fileStatus", FileStatus.Unchanged);
666 command.Parameters.AddWithValue("overlayStatus",
667 FileOverlayStatus.Normal);
669 var affected = command.ExecuteNonQuery();
673 catch (Exception exc)
675 Log.Error(exc.ToString());
680 private bool StateExists(string filePath,SQLiteConnection connection)
682 using (var command = new SQLiteCommand("Select count(*) from FileState where FilePath=:path COLLATE NOCASE", connection))
684 command.Parameters.AddWithValue("path", filePath);
685 var result = command.ExecuteScalar();
686 return ((long)result >= 1);
691 public void SetFileStatus(string path, FileStatus status)
693 if (String.IsNullOrWhiteSpace(path))
694 throw new ArgumentNullException("path");
695 if (!Path.IsPathRooted(path))
696 throw new ArgumentException("The path must be rooted", "path");
697 Contract.EndContractBlock();
699 _persistenceAgent.Post(() => UpdateStatusDirect(path, status));
702 public FileStatus GetFileStatus(string path)
704 if (String.IsNullOrWhiteSpace(path))
705 throw new ArgumentNullException("path");
706 if (!Path.IsPathRooted(path))
707 throw new ArgumentException("The path must be rooted", "path");
708 Contract.EndContractBlock();
711 using (var connection = GetConnection())
713 var command = new SQLiteCommand("select FileStatus from FileState where FilePath=:path COLLATE NOCASE", connection);
714 command.Parameters.AddWithValue("path", path);
716 var statusValue = command.ExecuteScalar();
717 if (statusValue==null)
718 return FileStatus.Missing;
719 return (FileStatus)Convert.ToInt32(statusValue);
724 /// Deletes the status of the specified file
726 /// <param name="path"></param>
727 public void ClearFileStatus(string path)
729 if (String.IsNullOrWhiteSpace(path))
730 throw new ArgumentNullException("path");
731 if (!Path.IsPathRooted(path))
732 throw new ArgumentException("The path must be rooted", "path");
733 Contract.EndContractBlock();
735 _persistenceAgent.Post(() => DeleteDirect(path));
739 /// Deletes the status of the specified folder and all its contents
741 /// <param name="path"></param>
742 public void ClearFolderStatus(string path)
744 if (String.IsNullOrWhiteSpace(path))
745 throw new ArgumentNullException("path");
746 if (!Path.IsPathRooted(path))
747 throw new ArgumentException("The path must be rooted", "path");
748 Contract.EndContractBlock();
750 _persistenceAgent.Post(() => DeleteFolderDirect(path));
753 public IEnumerable<FileState> GetChildren(FileState fileState)
755 if (fileState == null)
756 throw new ArgumentNullException("fileState");
757 Contract.EndContractBlock();
759 var children = from state in FileState.Queryable
760 where state.FilePath.StartsWith(fileState.FilePath + "\\")
765 public void EnsureFileState(string path)
767 var existingState = GetStateByFilePath(path);
768 if (existingState != null)
770 var fileInfo = FileInfoExtensions.FromPath(path);
771 using (new SessionScope())
773 var newState = FileState.CreateFor(fileInfo);
774 newState.FileStatus=FileStatus.Missing;
775 _persistenceAgent.PostAndAwait(newState.CreateAndFlush).Wait();
780 private int DeleteDirect(string filePath)
782 using (log4net.ThreadContext.Stacks["StatusAgent"].Push("DeleteDirect"))
789 using (var connection = GetConnection())
791 var command = new SQLiteCommand("delete from FileState where FilePath = :path COLLATE NOCASE",
794 command.Parameters.AddWithValue("path", filePath);
796 var affected = command.ExecuteNonQuery();
800 catch (Exception exc)
802 Log.Error(exc.ToString());
808 private int DeleteFolderDirect(string filePath)
810 using (log4net.ThreadContext.Stacks["StatusAgent"].Push("DeleteDirect"))
817 using (var connection = GetConnection())
819 var command = new SQLiteCommand(@"delete from FileState where FilePath = :path or FilePath like :path || '\%' COLLATE NOCASE",
822 command.Parameters.AddWithValue("path", filePath);
824 var affected = command.ExecuteNonQuery();
828 catch (Exception exc)
830 Log.Error(exc.ToString());
836 public void UpdateFileChecksum(string path, string shortHash, string checksum)
838 if (String.IsNullOrWhiteSpace(path))
839 throw new ArgumentNullException("path");
840 if (!Path.IsPathRooted(path))
841 throw new ArgumentException("The path must be rooted", "path");
842 Contract.EndContractBlock();
844 _persistenceAgent.Post(() => FileState.UpdateChecksum(path, shortHash,checksum));