1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
using MediaBrowser.Common.Events;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Concurrent;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.Library
{
/// <summary>
/// Class UserDataManager
/// </summary>
public class UserDataManager : IUserDataManager
{
public event EventHandler<UserDataSaveEventArgs> UserDataSaved;
private readonly ConcurrentDictionary<string, UserItemData> _userData = new ConcurrentDictionary<string, UserItemData>();
private readonly ILogger _logger;
public UserDataManager(ILogManager logManager)
{
_logger = logManager.GetLogger(GetType().Name);
}
/// <summary>
/// Gets or sets the repository.
/// </summary>
/// <value>The repository.</value>
public IUserDataRepository Repository { get; set; }
/// <summary>
/// Saves the user data.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="item">The item.</param>
/// <param name="userData">The user data.</param>
/// <param name="reason">The reason.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">userData
/// or
/// cancellationToken
/// or
/// userId
/// or
/// key</exception>
public async Task SaveUserData(Guid userId, IHasUserData item, UserItemData userData, UserDataSaveReason reason, CancellationToken cancellationToken)
{
if (userData == null)
{
throw new ArgumentNullException("userData");
}
if (item == null)
{
throw new ArgumentNullException("item");
}
if (userId == Guid.Empty)
{
throw new ArgumentNullException("userId");
}
cancellationToken.ThrowIfCancellationRequested();
var key = item.GetUserDataKey();
try
{
await Repository.SaveUserData(userId, key, userData, cancellationToken).ConfigureAwait(false);
var newValue = userData;
// Once it succeeds, put it into the dictionary to make it available to everyone else
_userData.AddOrUpdate(GetCacheKey(userId, key), newValue, delegate { return newValue; });
}
catch (Exception ex)
{
_logger.ErrorException("Error saving user data", ex);
throw;
}
EventHelper.FireEventIfNotNull(UserDataSaved, this, new UserDataSaveEventArgs
{
Key = key,
UserData = userData,
SaveReason = reason,
UserId = userId,
Item = item
}, _logger);
}
/// <summary>
/// Gets the user data.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="key">The key.</param>
/// <returns>Task{UserItemData}.</returns>
public UserItemData GetUserData(Guid userId, string key)
{
if (userId == Guid.Empty)
{
throw new ArgumentNullException("userId");
}
if (string.IsNullOrEmpty(key))
{
throw new ArgumentNullException("key");
}
return _userData.GetOrAdd(GetCacheKey(userId, key), keyName => Repository.GetUserData(userId, key));
}
/// <summary>
/// Gets the internal key.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="key">The key.</param>
/// <returns>System.String.</returns>
private string GetCacheKey(Guid userId, string key)
{
return userId + key;
}
}
}
|
