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
{
///
/// Class UserDataManager
///
public class UserDataManager : IUserDataManager
{
public event EventHandler UserDataSaved;
private readonly ConcurrentDictionary _userData = new ConcurrentDictionary();
private readonly ILogger _logger;
public UserDataManager(ILogManager logManager)
{
_logger = logManager.GetLogger(GetType().Name);
}
///
/// Gets or sets the repository.
///
/// The repository.
public IUserDataRepository Repository { get; set; }
///
/// Saves the user data.
///
/// The user id.
/// The key.
/// The user data.
/// The reason.
/// The cancellation token.
/// Task.
///
/// userData
/// or
/// cancellationToken
/// or
/// userId
/// or
/// key
///
public async Task SaveUserData(Guid userId, string key, UserItemData userData, UserDataSaveReason reason, CancellationToken cancellationToken)
{
if (userData == null)
{
throw new ArgumentNullException("userData");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
if (userId == Guid.Empty)
{
throw new ArgumentNullException("userId");
}
if (string.IsNullOrEmpty(key))
{
throw new ArgumentNullException("key");
}
cancellationToken.ThrowIfCancellationRequested();
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
}, _logger);
}
///
/// Gets the user data.
///
/// The user id.
/// The key.
/// Task{UserItemData}.
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));
}
///
/// Gets the internal key.
///
/// The user id.
/// The key.
/// System.String.
private string GetCacheKey(Guid userId, string key)
{
return userId + key;
}
}
}