[longomatch] Save serialzed objects in a safer way

[Andoni Morales Alastruey <amorales src gnome org>]

commit 2128aed6bb9052562597c0d0ef77f4a7e3646a60
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Fri Dec 12 19:03:25 2014 +0100

    Save serialzed objects in a safer way
    
    Save to a temporary file without replacing the original one
    and move to the final destination if the serialization
    succeed

 LongoMatch.Core/Common/Serializer.cs |   16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)
---
diff --git a/LongoMatch.Core/Common/Serializer.cs b/LongoMatch.Core/Common/Serializer.cs
index 15d8949..dcc3f15 100644
--- a/LongoMatch.Core/Common/Serializer.cs
+++ b/LongoMatch.Core/Common/Serializer.cs
@@ -55,12 +55,18 @@ namespace LongoMatch.Core.Common
                        }
                }
                
-               public static void Save<T>(T obj, string filepath,
-                                          SerializationType type=SerializationType.Json) {
-                       Stream stream = new FileStream(filepath, FileMode.Create, FileAccess.Write, 
FileShare.None);
-                       using (stream) {
+               public static void Save<T> (T obj, string filepath,
+                                         SerializationType type=SerializationType.Json)
+               {
+                       string tmpPath = filepath + ".tmp";
+                       using (Stream stream = new FileStream(tmpPath, FileMode.Create,
+                                                             FileAccess.Write, FileShare.None)) {
                                Save<T> (obj, stream, type);
-                               stream.Close();
+                       }
+                       if (File.Exists (filepath)) {
+                               File.Replace (tmpPath, filepath, null);
+                       } else {
+                               File.Move (tmpPath, filepath);
                        }
                }