jellyfin-server/MediaBrowser.Server.Implementations/Persistence/SqliteProviderInfoRepository.cs

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C#
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using System.Text;
using MediaBrowser.Common.Configuration;
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using MediaBrowser.Controller.Providers;
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using MediaBrowser.Model.Logging;
using System;
using System.Data;
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using System.IO;
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using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.Persistence
{
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public class SqliteProviderInfoRepository : IProviderRepository
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{
private IDbConnection _connection;
private readonly ILogger _logger;
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private IDbCommand _saveStatusCommand;
private readonly IApplicationPaths _appPaths;
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public SqliteProviderInfoRepository(IApplicationPaths appPaths, ILogManager logManager)
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{
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_appPaths = appPaths;
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_logger = logManager.GetLogger(GetType().Name);
}
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private SqliteShrinkMemoryTimer _shrinkMemoryTimer;
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/// <summary>
/// Gets the name of the repository
/// </summary>
/// <value>The name.</value>
public string Name
{
get
{
return "SQLite";
}
}
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/// <summary>
/// Opens the connection to the database
/// </summary>
/// <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, "refreshinfo.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 MetadataStatus (ItemId GUID PRIMARY KEY, ItemName TEXT, ItemType TEXT, SeriesName TEXT, DateLastMetadataRefresh datetime, DateLastImagesRefresh datetime, LastStatus TEXT, LastErrorMessage TEXT, MetadataProvidersRefreshed TEXT, ImageProvidersRefreshed TEXT, ItemDateModified DateTimeNull)",
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"create index if not exists idx_MetadataStatus on MetadataStatus(ItemId)",
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//pragmas
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"pragma temp_store = memory",
"pragma shrink_memory"
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};
_connection.RunQueries(queries, _logger);
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AddItemDateModifiedCommand();
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PrepareStatements();
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_shrinkMemoryTimer = new SqliteShrinkMemoryTimer(_connection, _writeLock, _logger);
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}
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private static readonly string[] StatusColumns =
{
"ItemId",
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"ItemName",
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"ItemType",
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"SeriesName",
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"DateLastMetadataRefresh",
"DateLastImagesRefresh",
"LastStatus",
"LastErrorMessage",
"MetadataProvidersRefreshed",
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"ImageProvidersRefreshed",
"ItemDateModified"
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};
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private void AddItemDateModifiedCommand()
{
using (var cmd = _connection.CreateCommand())
{
cmd.CommandText = "PRAGMA table_info(MetadataStatus)";
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
{
while (reader.Read())
{
if (!reader.IsDBNull(1))
{
var name = reader.GetString(1);
if (string.Equals(name, "ItemDateModified", StringComparison.OrdinalIgnoreCase))
{
return;
}
}
}
}
}
var builder = new StringBuilder();
builder.AppendLine("alter table MetadataStatus");
builder.AppendLine("add column ItemDateModified DateTime NULL");
_connection.RunQueries(new[] { builder.ToString() }, _logger);
}
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/// <summary>
/// The _write lock
/// </summary>
private readonly SemaphoreSlim _writeLock = new SemaphoreSlim(1, 1);
/// <summary>
/// Prepares the statements.
/// </summary>
private void PrepareStatements()
{
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_saveStatusCommand = _connection.CreateCommand();
_saveStatusCommand.CommandText = string.Format("replace into MetadataStatus ({0}) values ({1})",
string.Join(",", StatusColumns),
string.Join(",", StatusColumns.Select(i => "@" + i).ToArray()));
foreach (var col in StatusColumns)
{
_saveStatusCommand.Parameters.Add(_saveStatusCommand, "@" + col);
}
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}
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public MetadataStatus GetMetadataStatus(Guid itemId)
{
if (itemId == Guid.Empty)
{
throw new ArgumentNullException("itemId");
}
using (var cmd = _connection.CreateCommand())
{
var cmdText = "select " + string.Join(",", StatusColumns) + " from MetadataStatus where";
cmdText += " ItemId=@ItemId";
cmd.Parameters.Add(cmd, "@ItemId", DbType.Guid).Value = itemId;
cmd.CommandText = cmdText;
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow))
{
while (reader.Read())
{
return GetStatus(reader);
}
return null;
}
}
}
private MetadataStatus GetStatus(IDataReader reader)
{
var result = new MetadataStatus
{
ItemId = reader.GetGuid(0)
};
if (!reader.IsDBNull(1))
{
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result.ItemName = reader.GetString(1);
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}
if (!reader.IsDBNull(2))
{
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result.ItemName = reader.GetString(2);
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}
if (!reader.IsDBNull(3))
{
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result.SeriesName = reader.GetString(3);
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}
if (!reader.IsDBNull(4))
{
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result.DateLastMetadataRefresh = reader.GetDateTime(4).ToUniversalTime();
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}
if (!reader.IsDBNull(5))
{
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result.DateLastImagesRefresh = reader.GetDateTime(5).ToUniversalTime();
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}
if (!reader.IsDBNull(6))
{
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result.LastStatus = (ProviderRefreshStatus)Enum.Parse(typeof(ProviderRefreshStatus), reader.GetString(6), true);
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}
if (!reader.IsDBNull(7))
{
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result.LastErrorMessage = reader.GetString(7);
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}
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// Skip metadata and image providers
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if (!reader.IsDBNull(10))
{
result.ItemDateModified = reader.GetDateTime(10).ToUniversalTime();
}
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return result;
}
public async Task SaveMetadataStatus(MetadataStatus status, CancellationToken cancellationToken)
{
if (status == null)
{
throw new ArgumentNullException("status");
}
cancellationToken.ThrowIfCancellationRequested();
await _writeLock.WaitAsync(cancellationToken).ConfigureAwait(false);
IDbTransaction transaction = null;
try
{
transaction = _connection.BeginTransaction();
_saveStatusCommand.GetParameter(0).Value = status.ItemId;
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_saveStatusCommand.GetParameter(1).Value = status.ItemName;
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_saveStatusCommand.GetParameter(2).Value = status.ItemType;
_saveStatusCommand.GetParameter(3).Value = status.SeriesName;
_saveStatusCommand.GetParameter(4).Value = status.DateLastMetadataRefresh;
_saveStatusCommand.GetParameter(5).Value = status.DateLastImagesRefresh;
_saveStatusCommand.GetParameter(6).Value = status.LastStatus.ToString();
_saveStatusCommand.GetParameter(7).Value = status.LastErrorMessage;
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_saveStatusCommand.GetParameter(8).Value = string.Empty;
_saveStatusCommand.GetParameter(9).Value = string.Empty;
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_saveStatusCommand.GetParameter(10).Value = status.ItemDateModified;
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_saveStatusCommand.Transaction = transaction;
_saveStatusCommand.ExecuteNonQuery();
transaction.Commit();
}
catch (OperationCanceledException)
{
if (transaction != null)
{
transaction.Rollback();
}
throw;
}
catch (Exception e)
{
_logger.ErrorException("Failed to save provider info:", e);
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if (transaction != null)
{
transaction.Rollback();
}
throw;
}
finally
{
if (transaction != null)
{
transaction.Dispose();
}
_writeLock.Release();
}
}
/// <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)
{
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if (_shrinkMemoryTimer != null)
{
_shrinkMemoryTimer.Dispose();
_shrinkMemoryTimer = null;
}
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if (_connection != null)
{
if (_connection.IsOpen())
{
_connection.Close();
}
_connection.Dispose();
_connection = null;
}
}
}
catch (Exception ex)
{
_logger.ErrorException("Error disposing database", ex);
}
}
}
}
}