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jellyfin/MediaBrowser.Server.Impleme.../Persistence/SqliteDisplayPreferencesRep...

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using MediaBrowser.Common.Configuration;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Serialization;
using System;
using System.Data;
using System.Data.SQLite;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.Persistence
{
/// <summary>
/// Class SQLiteDisplayPreferencesRepository
/// </summary>
public class SqliteDisplayPreferencesRepository : IDisplayPreferencesRepository
{
private SQLiteConnection _connection;
private readonly ILogger _logger;
/// <summary>
/// Gets the name of the repository
/// </summary>
/// <value>The name.</value>
public string Name
{
get
{
return "SQLite";
}
}
/// <summary>
/// The _json serializer
/// </summary>
private readonly IJsonSerializer _jsonSerializer;
/// <summary>
/// The _app paths
/// </summary>
private readonly IApplicationPaths _appPaths;
private readonly SemaphoreSlim _writeLock = new SemaphoreSlim(1, 1);
/// <summary>
/// Initializes a new instance of the <see cref="SqliteDisplayPreferencesRepository" /> class.
/// </summary>
/// <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 SqliteDisplayPreferencesRepository(IApplicationPaths appPaths, IJsonSerializer jsonSerializer, ILogManager logManager)
{
if (jsonSerializer == null)
{
throw new ArgumentNullException("jsonSerializer");
}
if (appPaths == null)
{
throw new ArgumentNullException("appPaths");
}
_jsonSerializer = jsonSerializer;
_appPaths = appPaths;
_logger = logManager.GetLogger(GetType().Name);
}
/// <summary>
/// Opens the connection to the database
/// </summary>
/// <returns>Task.</returns>
public async Task Initialize()
{
var dbFile = Path.Combine(_appPaths.DataPath, "displaypreferences.db");
_connection = await SqliteExtensions.ConnectToDb(dbFile).ConfigureAwait(false);
string[] queries = {
"create table if not exists userdisplaypreferences (id GUID, userId GUID, client text, data BLOB)",
"create unique index if not exists userdisplaypreferencesindex on userdisplaypreferences (id, userId, client)",
//pragmas
"pragma temp_store = memory"
};
_connection.RunQueries(queries, _logger);
}
/// <summary>
/// Save the display preferences associated with an item in the repo
/// </summary>
/// <param name="displayPreferences">The display preferences.</param>
/// <param name="userId">The user id.</param>
/// <param name="client">The client.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
/// <exception cref="System.ArgumentNullException">item</exception>
public async Task SaveDisplayPreferences(DisplayPreferences displayPreferences, Guid userId, string client, CancellationToken cancellationToken)
{
if (displayPreferences == null)
{
throw new ArgumentNullException("displayPreferences");
}
if (displayPreferences.Id == Guid.Empty)
{
throw new ArgumentNullException("displayPreferences.Id");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
cancellationToken.ThrowIfCancellationRequested();
var serialized = _jsonSerializer.SerializeToBytes(displayPreferences);
await _writeLock.WaitAsync(cancellationToken).ConfigureAwait(false);
SQLiteTransaction transaction = null;
try
{
transaction = _connection.BeginTransaction();
using (var cmd = _connection.CreateCommand())
{
cmd.CommandText = "replace into userdisplaypreferences (id, userid, client, data) values (@1, @2, @3, @4)";
cmd.AddParam("@1", displayPreferences.Id);
cmd.AddParam("@2", userId);
cmd.AddParam("@3", client);
cmd.AddParam("@4", 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 display preferences:", e);
if (transaction != null)
{
transaction.Rollback();
}
throw;
}
finally
{
if (transaction != null)
{
transaction.Dispose();
}
_writeLock.Release();
}
}
/// <summary>
/// Gets the display preferences.
/// </summary>
/// <param name="displayPreferencesId">The display preferences id.</param>
/// <param name="userId">The user id.</param>
/// <param name="client">The client.</param>
/// <returns>Task{DisplayPreferences}.</returns>
/// <exception cref="System.ArgumentNullException">item</exception>
public DisplayPreferences GetDisplayPreferences(Guid displayPreferencesId, Guid userId, string client)
{
if (displayPreferencesId == Guid.Empty)
{
throw new ArgumentNullException("displayPreferencesId");
}
var cmd = _connection.CreateCommand();
cmd.CommandText = "select data from userdisplaypreferences where id = @id and userId=@userId and client=@client";
var idParam = cmd.Parameters.Add("@id", DbType.Guid);
idParam.Value = displayPreferencesId;
var userIdParam = cmd.Parameters.Add("@userId", DbType.Guid);
userIdParam.Value = userId;
var clientParam = cmd.Parameters.Add("@client", DbType.String);
clientParam.Value = client;
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow))
{
if (reader.Read())
{
using (var stream = reader.GetMemoryStream(0))
{
return _jsonSerializer.DeserializeFromStream<DisplayPreferences>(stream);
}
}
}
return new DisplayPreferences { Id = displayPreferencesId };
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private readonly object _disposeLock = new object();
/// <summary>
/// Releases unmanaged and - optionally - managed resources.
/// </summary>
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected virtual void Dispose(bool dispose)
{
if (dispose)
{
try
{
lock (_disposeLock)
{
if (_connection != null)
{
if (_connection.IsOpen())
{
_connection.Close();
}
_connection.Dispose();
_connection = null;
}
}
}
catch (Exception ex)
{
_logger.ErrorException("Error disposing database", ex);
}
}
}
}
}