mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-09-08 12:28:19 +02:00
296 lines
No EOL
9.1 KiB
C#
296 lines
No EOL
9.1 KiB
C#
using MediaBrowser.Controller;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Persistence;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Serialization;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.Persistence
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{
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/// <summary>
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/// Class SQLiteUserRepository
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/// </summary>
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public class SqliteUserRepository : IUserRepository
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{
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private readonly ILogger _logger;
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private readonly SemaphoreSlim _writeLock = new SemaphoreSlim(1, 1);
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private IDbConnection _connection;
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private readonly IServerApplicationPaths _appPaths;
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/// <summary>
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/// Gets the name of the repository
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/// </summary>
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/// <value>The name.</value>
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public string Name
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{
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get
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{
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return "SQLite";
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}
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}
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/// <summary>
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/// Gets the json serializer.
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/// </summary>
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/// <value>The json serializer.</value>
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private readonly IJsonSerializer _jsonSerializer;
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/// <summary>
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/// Initializes a new instance of the <see cref="SqliteUserRepository" /> class.
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/// </summary>
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/// <param name="jsonSerializer">The json serializer.</param>
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/// <param name="logManager">The log manager.</param>
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/// <param name="appPaths">The app paths.</param>
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/// <exception cref="System.ArgumentNullException">appPaths</exception>
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public SqliteUserRepository(IJsonSerializer jsonSerializer, ILogManager logManager, IServerApplicationPaths appPaths)
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{
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if (jsonSerializer == null)
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{
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throw new ArgumentNullException("jsonSerializer");
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}
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_jsonSerializer = jsonSerializer;
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_appPaths = appPaths;
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_logger = logManager.GetLogger(GetType().Name);
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}
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/// <summary>
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/// Opens the connection to the database
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/// </summary>
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/// <returns>Task.</returns>
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public async Task Initialize()
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{
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var dbFile = Path.Combine(_appPaths.DataPath, "users.db");
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_connection = await SqliteExtensions.ConnectToDb(dbFile, _logger).ConfigureAwait(false);
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string[] queries = {
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"create table if not exists users (guid GUID primary key, data BLOB)",
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"create index if not exists idx_users on users(guid)",
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"create table if not exists schema_version (table_name primary key, version)",
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//pragmas
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"pragma temp_store = memory",
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"pragma shrink_memory"
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};
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_connection.RunQueries(queries, _logger);
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}
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/// <summary>
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/// Save a user in the repo
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/// </summary>
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/// <param name="user">The user.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task.</returns>
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/// <exception cref="System.ArgumentNullException">user</exception>
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public async Task SaveUser(User user, CancellationToken cancellationToken)
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{
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if (user == null)
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{
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throw new ArgumentNullException("user");
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}
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cancellationToken.ThrowIfCancellationRequested();
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var serialized = _jsonSerializer.SerializeToBytes(user);
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cancellationToken.ThrowIfCancellationRequested();
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await _writeLock.WaitAsync(cancellationToken).ConfigureAwait(false);
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IDbTransaction transaction = null;
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try
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{
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transaction = _connection.BeginTransaction();
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using (var cmd = _connection.CreateCommand())
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{
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cmd.CommandText = "replace into users (guid, data) values (@1, @2)";
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cmd.Parameters.Add(cmd, "@1", DbType.Guid).Value = user.Id;
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cmd.Parameters.Add(cmd, "@2", DbType.Binary).Value = serialized;
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cmd.Transaction = transaction;
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cmd.ExecuteNonQuery();
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}
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transaction.Commit();
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}
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catch (OperationCanceledException)
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{
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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catch (Exception e)
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{
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_logger.ErrorException("Failed to save user:", e);
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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finally
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{
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if (transaction != null)
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{
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transaction.Dispose();
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}
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_writeLock.Release();
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}
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}
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/// <summary>
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/// Retrieve all users from the database
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/// </summary>
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/// <returns>IEnumerable{User}.</returns>
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public IEnumerable<User> RetrieveAllUsers()
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{
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using (var cmd = _connection.CreateCommand())
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{
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cmd.CommandText = "select data from users";
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using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
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{
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while (reader.Read())
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{
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using (var stream = reader.GetMemoryStream(0))
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{
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var user = _jsonSerializer.DeserializeFromStream<User>(stream);
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yield return user;
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}
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}
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}
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}
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}
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/// <summary>
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/// Deletes the user.
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/// </summary>
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/// <param name="user">The user.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task.</returns>
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/// <exception cref="System.ArgumentNullException">user</exception>
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public async Task DeleteUser(User user, CancellationToken cancellationToken)
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{
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if (user == null)
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{
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throw new ArgumentNullException("user");
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}
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cancellationToken.ThrowIfCancellationRequested();
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await _writeLock.WaitAsync(cancellationToken).ConfigureAwait(false);
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IDbTransaction transaction = null;
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try
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{
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transaction = _connection.BeginTransaction();
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using (var cmd = _connection.CreateCommand())
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{
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cmd.CommandText = "delete from users where guid=@guid";
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cmd.Parameters.Add(cmd, "@guid", DbType.Guid).Value = user.Id;
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cmd.Transaction = transaction;
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cmd.ExecuteNonQuery();
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}
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transaction.Commit();
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}
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catch (OperationCanceledException)
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{
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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catch (Exception e)
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{
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_logger.ErrorException("Failed to delete user:", e);
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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finally
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{
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if (transaction != null)
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{
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transaction.Dispose();
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}
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_writeLock.Release();
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}
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}
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/// <summary>
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/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
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/// </summary>
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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private readonly object _disposeLock = new object();
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/// <summary>
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/// Releases unmanaged and - optionally - managed resources.
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/// </summary>
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/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
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protected virtual void Dispose(bool dispose)
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{
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if (dispose)
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{
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try
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{
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lock (_disposeLock)
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{
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if (_connection != null)
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{
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if (_connection.IsOpen())
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{
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_connection.Close();
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}
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_connection.Dispose();
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_connection = null;
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}
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}
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error disposing database", ex);
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}
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}
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}
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}
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} |