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jellyfin/MediaBrowser.Server.Impleme.../Sqlite/SQLiteUserDataRepository.cs

289 lines
9.5 KiB

using System.Data.SQLite;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Serialization;
using System;
using System.Collections.Concurrent;
using System.Data;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.Sqlite
{
/// <summary>
/// Class SQLiteUserDataRepository
/// </summary>
public class SQLiteUserDataRepository : SqliteRepository, IUserDataRepository
{
private readonly ConcurrentDictionary<string, Task<UserItemData>> _userData = new ConcurrentDictionary<string, Task<UserItemData>>();
private readonly SemaphoreSlim _writeLock = new SemaphoreSlim(1, 1);
/// <summary>
/// The repository name
/// </summary>
public const string RepositoryName = "SQLite";
/// <summary>
/// Gets the name of the repository
/// </summary>
/// <value>The name.</value>
public string Name
{
get
{
return RepositoryName;
}
}
private readonly IJsonSerializer _jsonSerializer;
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/// <summary>
/// The _app paths
/// </summary>
private readonly IApplicationPaths _appPaths;
/// <summary>
/// Initializes a new instance of the <see cref="SQLiteUserDataRepository" /> class.
/// </summary>
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/// <param name="appPaths">The app paths.</param>
/// <param name="jsonSerializer">The json serializer.</param>
/// <param name="logManager">The log manager.</param>
/// <exception cref="System.ArgumentNullException">
/// jsonSerializer
/// or
/// appPaths
/// </exception>
public SQLiteUserDataRepository(IApplicationPaths appPaths, IJsonSerializer jsonSerializer, ILogManager logManager)
: base(logManager)
{
if (jsonSerializer == null)
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{
throw new ArgumentNullException("jsonSerializer");
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}
if (appPaths == null)
{
throw new ArgumentNullException("appPaths");
}
_jsonSerializer = jsonSerializer;
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_appPaths = appPaths;
}
/// <summary>
/// Opens the connection to the database
/// </summary>
/// <returns>Task.</returns>
public async Task Initialize()
{
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var dbFile = Path.Combine(_appPaths.DataPath, "userdata.db");
await ConnectToDb(dbFile).ConfigureAwait(false);
string[] queries = {
"create table if not exists userdata (key nvarchar, userId GUID, data BLOB)",
"create unique index if not exists userdataindex on userdata (key, userId)",
"create table if not exists schema_version (table_name primary key, version)",
//pragmas
"pragma temp_store = memory"
};
RunQueries(queries);
}
/// <summary>
/// Saves the user data.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="key">The key.</param>
/// <param name="userData">The user data.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">userData
/// or
/// cancellationToken
/// or
/// userId
/// or
/// userDataId</exception>
public async Task SaveUserData(Guid userId, string key, UserItemData userData, 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 PersistUserData(userId, key, userData, cancellationToken).ConfigureAwait(false);
var newValue = Task.FromResult(userData);
// Once it succeeds, put it into the dictionary to make it available to everyone else
_userData.AddOrUpdate(GetInternalKey(userId, key), newValue, delegate { return newValue; });
}
catch (Exception ex)
{
Logger.ErrorException("Error saving user data", ex);
throw;
}
}
/// <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 GetInternalKey(Guid userId, string key)
{
return userId + key;
}
/// <summary>
/// Persists the user data.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="key">The key.</param>
/// <param name="userData">The user data.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
public async Task PersistUserData(Guid userId, string key, UserItemData userData, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var serialized = _jsonSerializer.SerializeToBytes(userData);
cancellationToken.ThrowIfCancellationRequested();
await _writeLock.WaitAsync(cancellationToken).ConfigureAwait(false);
SQLiteTransaction transaction = null;
try
{
transaction = Connection.BeginTransaction();
using (var cmd = Connection.CreateCommand())
{
cmd.CommandText = "replace into userdata (key, userId, data) values (@1, @2, @3)";
cmd.AddParam("@1", key);
cmd.AddParam("@2", userId);
cmd.AddParam("@3", serialized);
cmd.Transaction = transaction;
await cmd.ExecuteNonQueryAsync(cancellationToken);
}
transaction.Commit();
}
catch (OperationCanceledException)
{
if (transaction != null)
{
transaction.Rollback();
}
throw;
}
catch (Exception e)
{
Logger.ErrorException("Failed to save user data:", e);
if (transaction != null)
{
transaction.Rollback();
}
throw;
}
finally
{
if (transaction != null)
{
transaction.Dispose();
}
_writeLock.Release();
}
}
/// <summary>
/// Gets the user data.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="key">The key.</param>
/// <returns>Task{UserItemData}.</returns>
/// <exception cref="System.ArgumentNullException">
/// userId
/// or
/// key
/// </exception>
public Task<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(GetInternalKey(userId, key), keyName => RetrieveUserData(userId, key));
}
/// <summary>
/// Retrieves the user data.
/// </summary>
/// <param name="userId">The user id.</param>
/// <param name="key">The key.</param>
/// <returns>Task{UserItemData}.</returns>
private async Task<UserItemData> RetrieveUserData(Guid userId, string key)
{
using (var cmd = Connection.CreateCommand())
{
cmd.CommandText = "select data from userdata where key = @key and userId=@userId";
var idParam = cmd.Parameters.Add("@key", DbType.String);
idParam.Value = key;
var userIdParam = cmd.Parameters.Add("@userId", DbType.Guid);
userIdParam.Value = userId;
using (var reader = await cmd.ExecuteReaderAsync(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow).ConfigureAwait(false))
{
if (reader.Read())
{
using (var stream = GetStream(reader, 0))
{
return _jsonSerializer.DeserializeFromStream<UserItemData>(stream);
}
}
}
return new UserItemData();
}
}
}
}