mirror of
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275 lines
No EOL
9.3 KiB
C#
275 lines
No EOL
9.3 KiB
C#
using MediaBrowser.Common.Configuration;
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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.Concurrent;
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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.Sqlite
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{
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/// <summary>
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/// Class SQLiteUserDataRepository
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/// </summary>
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public class SQLiteUserDataRepository : SqliteRepository, IUserDataRepository
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{
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private readonly ConcurrentDictionary<string, Task<UserItemData>> _userData = new ConcurrentDictionary<string, Task<UserItemData>>();
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/// <summary>
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/// The repository name
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/// </summary>
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public const string RepositoryName = "SQLite";
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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 RepositoryName;
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}
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}
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/// <summary>
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/// Gets a value indicating whether [enable delayed commands].
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/// </summary>
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/// <value><c>true</c> if [enable delayed commands]; otherwise, <c>false</c>.</value>
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protected override bool EnableDelayedCommands
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{
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get
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{
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return false;
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}
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}
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private readonly IJsonSerializer _jsonSerializer;
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/// <summary>
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/// The _app paths
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/// </summary>
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private readonly IApplicationPaths _appPaths;
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/// <summary>
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/// Initializes a new instance of the <see cref="SQLiteUserDataRepository" /> class.
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/// </summary>
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/// <param name="appPaths">The app paths.</param>
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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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/// <exception cref="System.ArgumentNullException">
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/// jsonSerializer
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/// or
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/// appPaths
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/// </exception>
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public SQLiteUserDataRepository(IApplicationPaths appPaths, IJsonSerializer jsonSerializer, ILogManager logManager)
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: base(logManager)
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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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if (appPaths == null)
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{
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throw new ArgumentNullException("appPaths");
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}
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_jsonSerializer = jsonSerializer;
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_appPaths = appPaths;
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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, "userdata.db");
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await ConnectToDb(dbFile).ConfigureAwait(false);
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string[] queries = {
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"create table if not exists userdata (key nvarchar, userId GUID, data BLOB)",
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"create unique index if not exists userdataindex on userdata (key, userId)",
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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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};
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RunQueries(queries);
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}
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/// <summary>
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/// Saves the user data.
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/// </summary>
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/// <param name="userId">The user id.</param>
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/// <param name="key">The key.</param>
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/// <param name="userData">The user data.</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">userData
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/// or
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/// cancellationToken
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/// or
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/// userId
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/// or
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/// userDataId</exception>
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public async Task SaveUserData(Guid userId, string key, UserItemData userData, CancellationToken cancellationToken)
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{
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if (userData == null)
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{
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throw new ArgumentNullException("userData");
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}
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if (cancellationToken == null)
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{
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throw new ArgumentNullException("cancellationToken");
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}
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if (userId == Guid.Empty)
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{
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throw new ArgumentNullException("userId");
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}
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if (string.IsNullOrEmpty(key))
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{
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throw new ArgumentNullException("key");
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}
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cancellationToken.ThrowIfCancellationRequested();
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try
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{
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await PersistUserData(userId, key, userData, cancellationToken).ConfigureAwait(false);
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var newValue = Task.FromResult(userData);
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// Once it succeeds, put it into the dictionary to make it available to everyone else
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_userData.AddOrUpdate(GetInternalKey(userId, key), newValue, delegate { return newValue; });
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}
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catch (Exception ex)
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{
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Logger.ErrorException("Error saving user data", ex);
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throw;
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}
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}
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/// <summary>
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/// Gets the internal key.
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/// </summary>
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/// <param name="userId">The user id.</param>
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/// <param name="key">The key.</param>
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/// <returns>System.String.</returns>
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private string GetInternalKey(Guid userId, string key)
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{
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return userId + key;
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}
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/// <summary>
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/// Persists the user data.
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/// </summary>
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/// <param name="userId">The user id.</param>
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/// <param name="key">The key.</param>
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/// <param name="userData">The user data.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task.</returns>
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public async Task PersistUserData(Guid userId, string key, UserItemData userData, CancellationToken cancellationToken)
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{
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cancellationToken.ThrowIfCancellationRequested();
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var serialized = _jsonSerializer.SerializeToBytes(userData);
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cancellationToken.ThrowIfCancellationRequested();
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using (var cmd = connection.CreateCommand())
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{
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cmd.CommandText = "replace into userdata (key, userId, data) values (@1, @2, @3)";
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cmd.AddParam("@1", key);
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cmd.AddParam("@2", userId);
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cmd.AddParam("@3", serialized);
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using (var tran = connection.BeginTransaction())
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{
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try
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{
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cmd.Transaction = tran;
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await cmd.ExecuteNonQueryAsync(cancellationToken);
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tran.Commit();
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}
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catch (OperationCanceledException)
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{
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tran.Rollback();
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}
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catch (Exception e)
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{
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Logger.ErrorException("Failed to commit transaction.", e);
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tran.Rollback();
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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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/// Gets the user data.
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/// </summary>
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/// <param name="userId">The user id.</param>
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/// <param name="key">The key.</param>
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/// <returns>Task{UserItemData}.</returns>
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/// <exception cref="System.ArgumentNullException">
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/// userId
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/// or
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/// key
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/// </exception>
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public Task<UserItemData> GetUserData(Guid userId, string key)
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{
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if (userId == Guid.Empty)
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{
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throw new ArgumentNullException("userId");
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}
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if (string.IsNullOrEmpty(key))
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{
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throw new ArgumentNullException("key");
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}
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return _userData.GetOrAdd(GetInternalKey(userId, key), keyName => RetrieveUserData(userId, key));
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}
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/// <summary>
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/// Retrieves the user data.
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/// </summary>
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/// <param name="userId">The user id.</param>
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/// <param name="key">The key.</param>
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/// <returns>Task{UserItemData}.</returns>
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private async Task<UserItemData> RetrieveUserData(Guid userId, string key)
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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 userdata where key = @key and userId=@userId";
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var idParam = cmd.Parameters.Add("@key", DbType.String);
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idParam.Value = key;
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var userIdParam = cmd.Parameters.Add("@userId", DbType.Guid);
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userIdParam.Value = userId;
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using (var reader = await cmd.ExecuteReaderAsync(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow).ConfigureAwait(false))
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{
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if (reader.Read())
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{
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using (var stream = GetStream(reader, 0))
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{
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return _jsonSerializer.DeserializeFromStream<UserItemData>(stream);
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}
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}
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}
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return new UserItemData();
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}
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}
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}
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} |