code.grnet.gr Git - pithos-ms-client/blob - trunk%2FPithos.Core%2FAgents%2FCloudTransferAction.cs

   1 #region
   2 /* -----------------------------------------------------------------------
   3  * <copyright file="CloudTransferAction.cs" company="GRNet">
   4  *
   5  * Copyright 2011-2012 GRNET S.A. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or
   8  * without modification, are permitted provided that the following
   9  * conditions are met:
  10  *
  11  *   1. Redistributions of source code must retain the above
  12  *      copyright notice, this list of conditions and the following
  13  *      disclaimer.
  14  *
  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.
  19  *
  20  *
  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.
  33  *
  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.
  38  * </copyright>
  39  * -----------------------------------------------------------------------
  40  */
  41 #endregion
  42 using System;
  43 using System.Diagnostics.Contracts;
  44 using System.IO;
  45 using System.Threading;
  46 using Pithos.Interfaces;
  47 using Pithos.Network;
  48
  49 namespace Pithos.Core.Agents
  50 {
  51     public enum CloudActionType
  52     {
  53         MustSynch,
  54         UploadUnconditional,
  55         DownloadUnconditional,
  56         DeleteLocal,
  57         DeleteCloud,
  58         RenameCloud,
  59         RenameLocal
  60     }
  61
  62     public class CloudAction
  63     {
  64         public AccountInfo AccountInfo { get; set; }
  65         public CloudActionType Action { get; set; }
  66         public FileSystemInfo LocalFile { get; set; }
  67         public ObjectInfo CloudFile { get; set; }
  68         public FileState FileState { get; set; }
  69         public string Container { get; set; }
  70
  71         public readonly DateTime Created = DateTime.Now;
  72
  73
  74         public Lazy<TreeHash> TreeHash { get; protected set; }
  75         //public Lazy<string> TopHash { get; set; }
  76
  77
  78         [ContractInvariantMethod]
  79         private void Invariants()
  80         {
  81             Contract.Invariant(AccountInfo!=null);
  82         }
  83
  84         public bool IsShared
  85         {
  86             get { return  CloudFile!=null && AccountInfo.UserName != CloudFile.Account; }
  87         }
  88
  89         protected CloudAction(AccountInfo accountInfo,CloudActionType action)
  90         {
  91             if (accountInfo==null)
  92                 throw new ArgumentNullException("accountInfo");
  93             Contract.EndContractBlock();
  94
  95             Action = action;
  96             AccountInfo = accountInfo;
  97         }
  98
  99         public CloudAction(AccountInfo accountInfo, CloudActionType action, FileSystemInfo localFile, ObjectInfo cloudFile, FileState state, int blockSize, string algorithm)
 100             : this(accountInfo,action)
 101         {
 102             if(blockSize<=0)
 103                 throw new ArgumentOutOfRangeException("blockSize");
 104             Contract.EndContractBlock();
 105             LocalFile = localFile.WithProperCapitalization();
 106             CloudFile = cloudFile;
 107             FileState = state;
 108
 109             if (LocalFile == null)
 110                 return;
 111
 112             TreeHash = new Lazy<TreeHash>(() => Signature.CalculateTreeHash(LocalFile, blockSize,algorithm),
 113                                             LazyThreadSafetyMode.ExecutionAndPublication);
 114         }
 115
 116         //Calculate the download path for the cloud file
 117         public string GetDownloadPath()
 118         {
 119             if (CloudFile == null)
 120                 return String.Empty;
 121             var filePath = CloudFile.RelativeUrlToFilePath(AccountInfo.UserName);
 122             return Path.Combine(AccountInfo.AccountPath, filePath);
 123         }
 124
 125         public override string ToString()
 126         {
 127             return String.Format("{0}:{1}->{2}", Action, LocalFile.FullName, CloudFile.Name);
 128         }
 129
 130         protected static ObjectInfo CreateObjectInfoFor(AccountInfo accountInfo, FileSystemInfo fileInfo)
 131         {
 132             Contract.Requires(accountInfo!=null);
 133             Contract.Requires(fileInfo!=null);
 134             Contract.Ensures(Contract.Result<ObjectInfo>()!=null);
 135
 136             var capitalizedFileInfo = fileInfo.WithProperCapitalization();
 137             var fullLocalName = capitalizedFileInfo.FullName;
 138             var othersPath = Path.Combine(accountInfo.AccountPath, FolderConstants.OthersFolder);
 139
 140             var isShared = fullLocalName.StartsWith(othersPath, StringComparison.InvariantCultureIgnoreCase);
 141             if (isShared)
 142             {
 143                 var pathRelativeToOther = fullLocalName.Substring(othersPath.Length + 1);
 144                 var otherParts = pathRelativeToOther.Split('\\');
 145                 var otherName = otherParts[0];
 146                 var otherContainer = otherParts[1];
 147                 return new ObjectInfo
 148                            {
 149                                Account = otherName,
 150                                Container = otherContainer,
 151                                Name = String.Join("/", otherParts.Splice(2))
 152                            };
 153             }
 154             return new ObjectInfo(accountInfo.AccountPath, accountInfo.UserName, fileInfo);
 155         }
 156     }
 157
 158     public class CloudDownloadAction:CloudAction
 159     {
 160         public CloudDownloadAction(AccountInfo accountInfo, ObjectInfo cloudFile)
 161             :base(accountInfo,CloudActionType.DownloadUnconditional)
 162         {
 163             if (String.IsNullOrWhiteSpace(cloudFile.Container))
 164                 throw new ArgumentException("CloudFile.Container","cloudFile");
 165             Contract.EndContractBlock();
 166
 167             CloudFile = cloudFile;
 168         }
 169
 170         [ContractInvariantMethod]
 171         private void Invariants()
 172         {
 173             Contract.Invariant(!String.IsNullOrWhiteSpace(CloudFile.Container));
 174         }
 175
 176         public override string ToString()
 177         {
 178             return String.Format("{0}: _ <- {1}", this.Action, this.CloudFile.Name);
 179         }
 180
 181     }
 182     public class CloudDeleteAction:CloudAction
 183     {
 184         public CloudDeleteAction(AccountInfo accountInfo,FileSystemInfo fileInfo, FileState fileState)
 185             : this(accountInfo,fileInfo,CreateObjectInfoFor(accountInfo, fileInfo),fileState)
 186         {
 187         }
 188
 189         public CloudDeleteAction(AccountInfo accountInfo, FileSystemInfo fileInfo,ObjectInfo cloudFile, FileState fileState)
 190             : base(accountInfo,CloudActionType.DeleteCloud)
 191         {
 192             CloudFile = cloudFile;
 193             LocalFile = fileInfo;
 194             FileState = fileState;
 195         }
 196
 197         public CloudDeleteAction(CloudAction action)
 198             : this(action.AccountInfo,action.LocalFile,action.CloudFile,action.FileState)
 199         {}
 200
 201         [ContractInvariantMethod]
 202         private void Invariants()
 203         {
 204             Contract.Invariant(!String.IsNullOrWhiteSpace(CloudFile.Container));
 205         }
 206
 207         public override string ToString()
 208         {
 209             return String.Format("{0}: _ ->{1}", Action, CloudFile.Name);
 210         }
 211
 212     }
 213
 214     public class CloudUploadAction:CloudAction
 215     {
 216         public CloudUploadAction(AccountInfo accountInfo, FileSystemInfo fileInfo, FileState state, int blockSize, string algorithm)
 217             : base(accountInfo, CloudActionType.UploadUnconditional,fileInfo,CreateObjectInfoFor(accountInfo,fileInfo),state,blockSize,algorithm)
 218         {
 219         }
 220
 221         [ContractInvariantMethod]
 222         private void Invariants()
 223         {
 224             Contract.Invariant(!String.IsNullOrWhiteSpace(CloudFile.Container));
 225         }
 226
 227     }
 228
 229     public class CloudMoveAction:CloudAction
 230     {
 231         public ObjectInfo OldCloudFile { get; set; }
 232
 233         public FileSystemInfo OldLocalFile { get; set; }
 234
 235         public CloudMoveAction(AccountInfo accountInfo, CloudActionType action, FileSystemInfo oldFile, FileSystemInfo newFile)
 236             :base(accountInfo,action)
 237         {
 238             LocalFile = newFile;
 239             CloudFile = CreateObjectInfoFor(accountInfo, newFile);
 240
 241             OldLocalFile = oldFile;
 242             OldCloudFile = CreateObjectInfoFor(accountInfo, oldFile);
 243
 244             //This is a rename operation, a hash will not be used
 245             TreeHash = new Lazy<TreeHash>(() => Network.TreeHash.Empty, LazyThreadSafetyMode.ExecutionAndPublication);
 246         }
 247
 248         public override string ToString()
 249         {
 250             return String.Format("{0}:{1}->{2}", Action, OldCloudFile.Name, CloudFile.Name);
 251         }
 252
 253     }
 254
 255 }