root / trunk / Pithos.Core / PithosWorkflow.cs @ 5e10d44f
History | View | Annotate | Download (4.8 kB)
1 |
#region |
---|---|
2 |
/* ----------------------------------------------------------------------- |
3 |
* <copyright file="PithosWorkflow.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.Collections.Generic; |
44 |
using System.ComponentModel.Composition; |
45 |
using System.Linq; |
46 |
using System.Runtime.InteropServices; |
47 |
using System.Text; |
48 |
using System.Threading; |
49 |
using System.Threading.Tasks; |
50 |
using Pithos.Interfaces; |
51 |
using System.IO; |
52 |
using System.Diagnostics; |
53 |
using Pithos.Network; |
54 |
|
55 |
namespace Pithos.Core |
56 |
{ |
57 |
[Export(typeof(IPithosWorkflow))] |
58 |
public class PithosWorkflow:IPithosWorkflow |
59 |
{ |
60 |
[Import] |
61 |
public IPithosSettings Settings { get; set; } |
62 |
|
63 |
[Import] |
64 |
public IStatusKeeper StatusKeeper { get; set; } |
65 |
|
66 |
public FileStatus SetFileStatus(string path, FileStatus status) |
67 |
{ |
68 |
Debug.Assert(!path.Contains(FolderConstants.CacheFolder)); |
69 |
Debug.Assert(!path.EndsWith(".ignore",StringComparison.InvariantCultureIgnoreCase)); |
70 |
|
71 |
if (String.IsNullOrWhiteSpace(path)) |
72 |
throw new ArgumentNullException("path", "The path parameter must not be emtpy"); |
73 |
|
74 |
var oldStatus=StatusKeeper.GetFileStatus(path); |
75 |
|
76 |
if (oldStatus == status) |
77 |
return oldStatus; |
78 |
|
79 |
switch(oldStatus) |
80 |
{ |
81 |
case FileStatus.Unchanged : |
82 |
break; |
83 |
case FileStatus.Created: |
84 |
if (status == FileStatus.Modified) |
85 |
return oldStatus; |
86 |
break; |
87 |
case FileStatus.Modified: |
88 |
case FileStatus.Renamed: |
89 |
if (status == FileStatus.Created) |
90 |
return oldStatus; |
91 |
break; |
92 |
} |
93 |
StatusKeeper.SetFileStatus(path, status); |
94 |
return status; |
95 |
} |
96 |
|
97 |
public void ClearFileStatus(string path) |
98 |
{ |
99 |
if (String.IsNullOrWhiteSpace(path)) |
100 |
throw new ArgumentNullException("path", "The path parameter must not be emtpy"); |
101 |
|
102 |
StatusKeeper.ClearFileStatus(path.ToLower()); |
103 |
} |
104 |
|
105 |
|
106 |
public Task<FileStream> OpenStreamWithWaiting(string path) |
107 |
{ |
108 |
if (String.IsNullOrWhiteSpace(path)) |
109 |
throw new ArgumentNullException("path","The path parameter must not be emtpy"); |
110 |
|
111 |
if (!File.Exists(path)) |
112 |
throw new FileNotFoundException("The specified file or path does not exist", path); |
113 |
|
114 |
return new Task<FileStream>(() => |
115 |
{ |
116 |
int counter = 0; |
117 |
while (true) |
118 |
{ |
119 |
try |
120 |
{ |
121 |
var stream=File.OpenRead(path); |
122 |
return stream; |
123 |
} |
124 |
catch |
125 |
{ |
126 |
Thread.Sleep(500); |
127 |
if (++counter > 10) |
128 |
throw; |
129 |
} |
130 |
} |
131 |
}); |
132 |
} |
133 |
} |
134 |
} |