root / trunk / Pithos.Core / Agents / StatusAgent.cs @ 039a89e5
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using System; |
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using System.Collections.Generic; |
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using System.ComponentModel.Composition; |
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using System.Data.SQLite; |
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using System.Diagnostics; |
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using System.Diagnostics.Contracts; |
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using System.IO; |
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using System.Linq; |
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using System.Threading; |
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using System.Threading.Tasks; |
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using Castle.ActiveRecord; |
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using Castle.ActiveRecord.Framework.Config; |
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using Pithos.Interfaces; |
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using Pithos.Network; |
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using log4net; |
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|
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namespace Pithos.Core.Agents |
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{ |
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[Export(typeof(IStatusChecker)),Export(typeof(IStatusKeeper))] |
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public class StatusAgent:IStatusChecker,IStatusKeeper |
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{ |
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[System.ComponentModel.Composition.Import] |
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public IPithosSettings Settings { get; set; } |
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|
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private Agent<Action> _persistenceAgent; |
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|
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|
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private static readonly ILog Log = LogManager.GetLogger("StatusAgent"); |
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|
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public StatusAgent() |
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{ |
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var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData); |
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_pithosDataPath = Path.Combine(appDataPath , "Pithos"); |
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|
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if (!Directory.Exists(_pithosDataPath)) |
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Directory.CreateDirectory(_pithosDataPath); |
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var source = GetConfiguration(_pithosDataPath); |
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ActiveRecordStarter.Initialize(source,typeof(FileState),typeof(FileTag)); |
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ActiveRecordStarter.UpdateSchema(); |
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|
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if (!File.Exists(Path.Combine(_pithosDataPath ,"pithos.db"))) |
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ActiveRecordStarter.CreateSchema(); |
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} |
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|
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|
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|
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private static InPlaceConfigurationSource GetConfiguration(string pithosDbPath) |
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{ |
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if (String.IsNullOrWhiteSpace(pithosDbPath)) |
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throw new ArgumentNullException("pithosDbPath"); |
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if (!Path.IsPathRooted(pithosDbPath)) |
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throw new ArgumentException("path must be a rooted path", "pithosDbPath"); |
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Contract.EndContractBlock(); |
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|
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var properties = new Dictionary<string, string> |
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{ |
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{"connection.driver_class", "NHibernate.Driver.SQLite20Driver"}, |
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{"dialect", "NHibernate.Dialect.SQLiteDialect"}, |
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{"connection.provider", "NHibernate.Connection.DriverConnectionProvider"}, |
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{ |
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"proxyfactory.factory_class", |
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"NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle" |
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}, |
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}; |
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|
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var connectionString = String.Format(@"Data Source={0}\pithos.db;Version=3;Enlist=N", pithosDbPath); |
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properties.Add("connection.connection_string", connectionString); |
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|
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var source = new InPlaceConfigurationSource(); |
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source.Add(typeof (ActiveRecordBase), properties); |
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source.SetDebugFlag(false); |
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return source; |
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} |
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|
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public void StartProcessing(CancellationToken token) |
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{ |
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_persistenceAgent = Agent<Action>.Start(queue => |
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{ |
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Action loop = null; |
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loop = () => |
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{ |
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var job = queue.Receive(); |
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job.ContinueWith(t => |
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{ |
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var action = job.Result; |
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try |
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{ |
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action(); |
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} |
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catch (SQLiteException ex) |
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{ |
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Log.ErrorFormat("[ERROR] SQL \n{0}", ex); |
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} |
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catch (Exception ex) |
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{ |
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Log.ErrorFormat("[ERROR] STATE \n{0}", ex); |
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} |
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// ReSharper disable AccessToModifiedClosure |
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queue.DoAsync(loop); |
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// ReSharper restore AccessToModifiedClosure |
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}); |
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}; |
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loop(); |
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}); |
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|
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} |
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|
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|
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|
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public void Stop() |
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{ |
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_persistenceAgent.Stop(); |
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} |
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|
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|
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public void ProcessExistingFiles(IEnumerable<FileInfo> existingFiles) |
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{ |
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if(existingFiles ==null) |
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throw new ArgumentNullException("existingFiles"); |
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Contract.EndContractBlock(); |
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|
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//Find new or matching files with a left join to the stored states |
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var fileStates = FileState.Queryable; |
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var currentFiles=from file in existingFiles |
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join state in fileStates on file.FullName.ToLower() equals state.FilePath.ToLower() into gs |
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from substate in gs.DefaultIfEmpty() |
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select new {File = file, State = substate}; |
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|
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//To get the deleted files we must get the states that have no corresponding |
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//files. |
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//We can't use the File.Exists method inside a query, so we get all file paths from the states |
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var statePaths = (from state in fileStates |
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select new {state.Id, state.FilePath}).ToList(); |
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//and check each one |
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var missingStates= (from path in statePaths |
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where !File.Exists(path.FilePath) && !Directory.Exists(path.FilePath) |
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select path.Id).ToList(); |
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//Finally, retrieve the states that correspond to the deleted files |
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var deletedFiles = from state in fileStates |
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where missingStates.Contains(state.Id) |
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select new { File = default(FileInfo), State = state }; |
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|
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var pairs = currentFiles.Union(deletedFiles); |
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|
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foreach(var pair in pairs) |
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{ |
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var fileState = pair.State; |
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var file = pair.File; |
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if (fileState == null) |
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{ |
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//This is a new file |
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var fullPath = pair.File.FullName.ToLower(); |
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var createState = FileState.CreateForAsync(fullPath, BlockSize, BlockHash); |
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createState.ContinueWith(state => _persistenceAgent.Post(state.Result.Create)); |
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} |
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else if (file == null) |
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{ |
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//This file was deleted while we were down. We should mark it as deleted |
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//We have to go through UpdateStatus here because the state object we are using |
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//was created by a different ORM session. |
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_persistenceAgent.Post(()=> UpdateStatusDirect(fileState.Id, FileStatus.Deleted)); |
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} |
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else |
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{ |
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//This file has a matching state. Need to check for possible changes |
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var hashString = file.CalculateHash(BlockSize,BlockHash); |
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//If the hashes don't match the file was changed |
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if (fileState.Checksum != hashString) |
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{ |
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_persistenceAgent.Post(() => UpdateStatusDirect(fileState.Id, FileStatus.Modified)); |
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} |
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} |
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}; |
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|
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} |
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|
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private int UpdateStatusDirect(Guid id, FileStatus status) |
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{ |
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using (log4net.ThreadContext.Stacks["StatusAgent"].Push("UpdateStatusDirect")) |
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{ |
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|
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try |
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{ |
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|
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using (var connection = GetConnection()) |
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using ( |
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var command = new SQLiteCommand("update FileState set FileStatus= :fileStatus where Id = :id ", |
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connection)) |
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{ |
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command.Parameters.AddWithValue("fileStatus", status); |
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|
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command.Parameters.AddWithValue("id", id); |
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|
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var affected = command.ExecuteNonQuery(); |
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|
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return affected; |
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} |
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|
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} |
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catch (Exception exc) |
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{ |
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Log.Error(exc.ToString()); |
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throw; |
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} |
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} |
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} |
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|
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private int UpdateStatusDirect(string path, FileStatus status) |
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{ |
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using (log4net.ThreadContext.Stacks["StatusAgent"].Push("UpdateStatusDirect")) |
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{ |
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|
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try |
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{ |
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|
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|
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using (var connection = GetConnection()) |
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using ( |
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var command = |
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new SQLiteCommand("update FileState set FileStatus= :fileStatus where FilePath = :path ", |
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connection)) |
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{ |
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|
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|
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command.Parameters.AddWithValue("fileStatus", status); |
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|
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command.Parameters.AddWithValue("path", path.ToLower()); |
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|
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var affected = command.ExecuteNonQuery(); |
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return affected; |
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} |
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} |
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catch (Exception exc) |
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{ |
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Log.Error(exc.ToString()); |
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throw; |
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} |
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} |
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} |
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|
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private int UpdateStatusDirect(string absolutePath, FileStatus fileStatus, FileOverlayStatus overlayStatus) |
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{ |
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using (log4net.ThreadContext.Stacks["StatusAgent"].Push("UpdateStatusDirect")) |
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{ |
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|
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try |
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{ |
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|
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|
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using (var connection = GetConnection()) |
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using ( |
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var command = |
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new SQLiteCommand( |
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"update FileState set OverlayStatus= :overlayStatus, FileStatus= :fileStatus where FilePath = :path ", |
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connection)) |
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{ |
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|
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command.Parameters.AddWithValue("path", absolutePath.ToLower()); |
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command.Parameters.AddWithValue("fileStatus", fileStatus); |
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command.Parameters.AddWithValue("overlayStatus", overlayStatus); |
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|
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var affected = command.ExecuteNonQuery(); |
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return affected; |
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} |
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} |
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catch (Exception exc) |
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{ |
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Log.Error(exc.ToString()); |
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throw; |
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} |
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} |
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} |
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|
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|
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|
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public string BlockHash { get; set; } |
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|
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public int BlockSize { get; set; } |
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public void ChangeRoots(string oldPath, string newPath) |
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{ |
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if (String.IsNullOrWhiteSpace(oldPath)) |
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throw new ArgumentNullException("oldPath"); |
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if (!Path.IsPathRooted(oldPath)) |
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throw new ArgumentException("oldPath must be an absolute path", "oldPath"); |
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if (string.IsNullOrWhiteSpace(newPath)) |
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throw new ArgumentNullException("newPath"); |
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if (!Path.IsPathRooted(newPath)) |
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throw new ArgumentException("newPath must be an absolute path", "newPath"); |
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Contract.EndContractBlock(); |
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|
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FileState.ChangeRootPath(oldPath,newPath); |
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|
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} |
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|
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private PithosStatus _pithosStatus=PithosStatus.InSynch; |
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|
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public void SetPithosStatus(PithosStatus status) |
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{ |
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_pithosStatus = status; |
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} |
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|
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public PithosStatus GetPithosStatus() |
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{ |
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return _pithosStatus; |
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} |
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|
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|
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private readonly string _pithosDataPath; |
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|
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|
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public FileState GetStateByFilePath(string path) |
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{ |
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if (String.IsNullOrWhiteSpace(path)) |
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throw new ArgumentNullException("path"); |
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if (!Path.IsPathRooted(path)) |
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throw new ArgumentException("The path must be rooted", "path"); |
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Contract.EndContractBlock(); |
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|
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try |
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{ |
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|
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using (var connection = GetConnection()) |
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using (var command = new SQLiteCommand("select Id, FilePath, OverlayStatus,FileStatus ,Checksum ,Version ,VersionTimeStamp,IsShared ,SharedBy ,ShareWrite from FileState where FilePath=:path", connection)) |
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{ |
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|
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command.Parameters.AddWithValue("path", path.ToLower()); |
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|
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using (var reader = command.ExecuteReader()) |
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{ |
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if (reader.Read()) |
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{ |
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//var values = new object[reader.FieldCount]; |
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//reader.GetValues(values); |
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var state = new FileState |
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{ |
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Id = reader.GetGuid(0), |
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FilePath = reader.IsDBNull(1)?"":reader.GetString(1), |
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OverlayStatus =reader.IsDBNull(2)?FileOverlayStatus.Unversioned: (FileOverlayStatus) reader.GetInt64(2), |
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FileStatus = reader.IsDBNull(3)?FileStatus.Missing:(FileStatus) reader.GetInt64(3), |
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Checksum = reader.IsDBNull(4)?"":reader.GetString(4), |
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Version = reader.IsDBNull(5)?default(long):reader.GetInt64(5), |
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VersionTimeStamp = reader.IsDBNull(6)?default(DateTime):reader.GetDateTime(6), |
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IsShared = !reader.IsDBNull(7) && reader.GetBoolean(7), |
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SharedBy = reader.IsDBNull(8)?"":reader.GetString(8), |
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ShareWrite = !reader.IsDBNull(9) && reader.GetBoolean(9) |
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}; |
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/* |
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var state = new FileState |
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{ |
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Id = (Guid) values[0], |
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FilePath = (string) values[1], |
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OverlayStatus = (FileOverlayStatus) (long)values[2], |
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FileStatus = (FileStatus) (long)values[3], |
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Checksum = (string) values[4], |
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Version = (long?) values[5], |
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VersionTimeStamp = (DateTime?) values[6], |
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IsShared = (long)values[7] == 1, |
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SharedBy = (string) values[8], |
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ShareWrite = (long)values[9] == 1 |
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}; |
361 |
*/ |
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return state; |
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} |
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else |
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{ |
366 |
return null; |
367 |
} |
368 |
|
369 |
} |
370 |
} |
371 |
} |
372 |
catch (Exception exc) |
373 |
{ |
374 |
Log.ErrorFormat(exc.ToString()); |
375 |
throw; |
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} |
377 |
} |
378 |
|
379 |
public FileOverlayStatus GetFileOverlayStatus(string path) |
380 |
{ |
381 |
if (String.IsNullOrWhiteSpace(path)) |
382 |
throw new ArgumentNullException("path"); |
383 |
if (!Path.IsPathRooted(path)) |
384 |
throw new ArgumentException("The path must be rooted", "path"); |
385 |
Contract.EndContractBlock(); |
386 |
|
387 |
try |
388 |
{ |
389 |
|
390 |
using (var connection = GetConnection()) |
391 |
using (var command = new SQLiteCommand("select OverlayStatus from FileState where FilePath=:path", connection)) |
392 |
{ |
393 |
|
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command.Parameters.AddWithValue("path", path.ToLower()); |
395 |
|
396 |
var s = command.ExecuteScalar(); |
397 |
return (FileOverlayStatus) Convert.ToInt32(s); |
398 |
} |
399 |
} |
400 |
catch (Exception exc) |
401 |
{ |
402 |
Log.ErrorFormat(exc.ToString()); |
403 |
return FileOverlayStatus.Unversioned; |
404 |
} |
405 |
} |
406 |
|
407 |
private string GetConnectionString() |
408 |
{ |
409 |
var connectionString = String.Format(@"Data Source={0}\pithos.db;Version=3;Enlist=N;Pooling=True;Default Isolation Level=ReadCommited;show_sql=true", _pithosDataPath); |
410 |
return connectionString; |
411 |
} |
412 |
|
413 |
private SQLiteConnection GetConnection() |
414 |
{ |
415 |
var connectionString = GetConnectionString(); |
416 |
var connection = new SQLiteConnection(connectionString); |
417 |
connection.Open(); |
418 |
using(var cmd =connection.CreateCommand()) |
419 |
{ |
420 |
cmd.CommandText = "PRAGMA journal_mode=WAL"; |
421 |
cmd.ExecuteNonQuery(); |
422 |
} |
423 |
return connection; |
424 |
} |
425 |
|
426 |
public void SetFileOverlayStatus(string path, FileOverlayStatus overlayStatus) |
427 |
{ |
428 |
if (String.IsNullOrWhiteSpace(path)) |
429 |
throw new ArgumentNullException("path"); |
430 |
if (!Path.IsPathRooted(path)) |
431 |
throw new ArgumentException("The path must be rooted","path"); |
432 |
Contract.EndContractBlock(); |
433 |
|
434 |
_persistenceAgent.Post(() => FileState.StoreOverlayStatus(path.ToLower(),overlayStatus)); |
435 |
} |
436 |
|
437 |
/* public void RenameFileOverlayStatus(string oldPath, string newPath) |
438 |
{ |
439 |
if (String.IsNullOrWhiteSpace(oldPath)) |
440 |
throw new ArgumentNullException("oldPath"); |
441 |
if (!Path.IsPathRooted(oldPath)) |
442 |
throw new ArgumentException("The oldPath must be rooted", "oldPath"); |
443 |
if (String.IsNullOrWhiteSpace(newPath)) |
444 |
throw new ArgumentNullException("newPath"); |
445 |
if (!Path.IsPathRooted(newPath)) |
446 |
throw new ArgumentException("The newPath must be rooted", "newPath"); |
447 |
Contract.EndContractBlock(); |
448 |
|
449 |
_persistenceAgent.Post(() =>FileState.RenameState(oldPath, newPath)); |
450 |
}*/ |
451 |
|
452 |
public void SetFileState(string path, FileStatus fileStatus, FileOverlayStatus overlayStatus) |
453 |
{ |
454 |
if (String.IsNullOrWhiteSpace(path)) |
455 |
throw new ArgumentNullException("path"); |
456 |
if (!Path.IsPathRooted(path)) |
457 |
throw new ArgumentException("The path must be rooted", "path"); |
458 |
Contract.EndContractBlock(); |
459 |
|
460 |
Debug.Assert(!path.Contains(FolderConstants.CacheFolder)); |
461 |
Debug.Assert(!path.EndsWith(".ignore")); |
462 |
|
463 |
_persistenceAgent.Post(() => UpdateStatusDirect(path.ToLower(), fileStatus, overlayStatus)); |
464 |
} |
465 |
|
466 |
/* |
467 |
public void StoreInfo(string path,ObjectInfo objectInfo) |
468 |
{ |
469 |
if (String.IsNullOrWhiteSpace(path)) |
470 |
throw new ArgumentNullException("path"); |
471 |
if (!Path.IsPathRooted(path)) |
472 |
throw new ArgumentException("The path must be rooted", "path"); |
473 |
if (objectInfo == null) |
474 |
throw new ArgumentNullException("objectInfo", "objectInfo can't be empty"); |
475 |
Contract.EndContractBlock(); |
476 |
|
477 |
_persistenceAgent.Post(() => |
478 |
{ |
479 |
var filePath = path.ToLower(); |
480 |
//Load the existing files state and set its properties in one session |
481 |
using (new SessionScope()) |
482 |
{ |
483 |
//Forgetting to use a sessionscope results in two sessions being created, one by |
484 |
//FirstOrDefault and one by Save() |
485 |
var state =FileState.FindByFilePath(filePath); |
486 |
|
487 |
//Create a new empty state object if this is a new file |
488 |
state = state ?? new FileState(); |
489 |
|
490 |
state.FilePath = filePath; |
491 |
state.Checksum = objectInfo.Hash; |
492 |
state.Version = objectInfo.Version; |
493 |
state.VersionTimeStamp = objectInfo.VersionTimestamp; |
494 |
|
495 |
state.FileStatus = FileStatus.Unchanged; |
496 |
state.OverlayStatus = FileOverlayStatus.Normal; |
497 |
|
498 |
|
499 |
//Do the save |
500 |
state.Save(); |
501 |
} |
502 |
}); |
503 |
|
504 |
} |
505 |
*/ |
506 |
|
507 |
public void StoreInfo(string path, ObjectInfo objectInfo) |
508 |
{ |
509 |
if (String.IsNullOrWhiteSpace(path)) |
510 |
throw new ArgumentNullException("path"); |
511 |
if (!Path.IsPathRooted(path)) |
512 |
throw new ArgumentException("The path must be rooted", "path"); |
513 |
if (objectInfo == null) |
514 |
throw new ArgumentNullException("objectInfo", "objectInfo can't be empty"); |
515 |
Contract.EndContractBlock(); |
516 |
|
517 |
_persistenceAgent.Post(() => StoreInfoDirect(path, objectInfo)); |
518 |
|
519 |
} |
520 |
|
521 |
private void StoreInfoDirect(string path, ObjectInfo objectInfo) |
522 |
{ |
523 |
try |
524 |
{ |
525 |
|
526 |
using (var connection = GetConnection()) |
527 |
using (var command = new SQLiteCommand(connection)) |
528 |
{ |
529 |
if (StateExists(path, connection)) |
530 |
command.CommandText = |
531 |
"update FileState set FileStatus= :fileStatus where FilePath = :path "; |
532 |
else |
533 |
{ |
534 |
command.CommandText = |
535 |
"INSERT INTO FileState (Id,FilePath,Checksum,Version,VersionTimeStamp,FileStatus,OverlayStatus) VALUES (:id,:path,:checksum,:version,:versionTimeStamp,:fileStatus,:overlayStatus)"; |
536 |
command.Parameters.AddWithValue("id", Guid.NewGuid()); |
537 |
} |
538 |
|
539 |
command.Parameters.AddWithValue("path", path.ToLower()); |
540 |
command.Parameters.AddWithValue("checksum", objectInfo.Hash); |
541 |
command.Parameters.AddWithValue("version", objectInfo.Version); |
542 |
command.Parameters.AddWithValue("versionTimeStamp", |
543 |
objectInfo.VersionTimestamp); |
544 |
command.Parameters.AddWithValue("fileStatus", FileStatus.Unchanged); |
545 |
command.Parameters.AddWithValue("overlayStatus", |
546 |
FileOverlayStatus.Normal); |
547 |
|
548 |
var affected = command.ExecuteNonQuery(); |
549 |
return; |
550 |
} |
551 |
} |
552 |
catch (Exception exc) |
553 |
{ |
554 |
Log.Error(exc.ToString()); |
555 |
throw; |
556 |
} |
557 |
} |
558 |
|
559 |
private bool StateExists(string filePath,SQLiteConnection connection) |
560 |
{ |
561 |
using (var command = new SQLiteCommand("Select count(*) from FileState where FilePath=:path", connection)) |
562 |
{ |
563 |
command.Parameters.AddWithValue("path", filePath.ToLower()); |
564 |
var result = command.ExecuteScalar(); |
565 |
return ((long)result >= 1); |
566 |
} |
567 |
|
568 |
} |
569 |
|
570 |
public void SetFileStatus(string path, FileStatus status) |
571 |
{ |
572 |
if (String.IsNullOrWhiteSpace(path)) |
573 |
throw new ArgumentNullException("path"); |
574 |
if (!Path.IsPathRooted(path)) |
575 |
throw new ArgumentException("The path must be rooted", "path"); |
576 |
Contract.EndContractBlock(); |
577 |
|
578 |
_persistenceAgent.Post(() => UpdateStatusDirect(path.ToLower(), status)); |
579 |
} |
580 |
|
581 |
public FileStatus GetFileStatus(string path) |
582 |
{ |
583 |
if (String.IsNullOrWhiteSpace(path)) |
584 |
throw new ArgumentNullException("path"); |
585 |
if (!Path.IsPathRooted(path)) |
586 |
throw new ArgumentException("The path must be rooted", "path"); |
587 |
Contract.EndContractBlock(); |
588 |
|
589 |
|
590 |
using (var connection = GetConnection()) |
591 |
{ |
592 |
var command = new SQLiteCommand("select FileStatus from FileState where FilePath=:path", connection); |
593 |
command.Parameters.AddWithValue("path", path.ToLower()); |
594 |
|
595 |
var s = command.ExecuteScalar(); |
596 |
return (FileStatus)Convert.ToInt32(s); |
597 |
} |
598 |
} |
599 |
|
600 |
public void ClearFileStatus(string path) |
601 |
{ |
602 |
if (String.IsNullOrWhiteSpace(path)) |
603 |
throw new ArgumentNullException("path"); |
604 |
if (!Path.IsPathRooted(path)) |
605 |
throw new ArgumentException("The path must be rooted", "path"); |
606 |
Contract.EndContractBlock(); |
607 |
|
608 |
_persistenceAgent.Post(() => DeleteDirect(path)); |
609 |
} |
610 |
|
611 |
private int DeleteDirect(string filePath) |
612 |
{ |
613 |
using (log4net.ThreadContext.Stacks["StatusAgent"].Push("DeleteDirect")) |
614 |
{ |
615 |
|
616 |
try |
617 |
{ |
618 |
|
619 |
|
620 |
using (var connection = GetConnection()) |
621 |
{ |
622 |
var command = new SQLiteCommand("delete from FileState where FilePath = :path", |
623 |
connection); |
624 |
|
625 |
command.Parameters.AddWithValue("path", filePath.ToLower()); |
626 |
|
627 |
var affected = command.ExecuteNonQuery(); |
628 |
return affected; |
629 |
} |
630 |
} |
631 |
catch (Exception exc) |
632 |
{ |
633 |
Log.Error(exc.ToString()); |
634 |
throw; |
635 |
} |
636 |
} |
637 |
} |
638 |
|
639 |
public void UpdateFileChecksum(string path, string checksum) |
640 |
{ |
641 |
if (String.IsNullOrWhiteSpace(path)) |
642 |
throw new ArgumentNullException("path"); |
643 |
if (!Path.IsPathRooted(path)) |
644 |
throw new ArgumentException("The path must be rooted", "path"); |
645 |
Contract.EndContractBlock(); |
646 |
|
647 |
_persistenceAgent.Post(() => FileState.UpdateChecksum(path.ToLower(), checksum)); |
648 |
} |
649 |
|
650 |
} |
651 |
|
652 |
|
653 |
} |