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84 lines
2.2 KiB
C#
84 lines
2.2 KiB
C#
using MediaBrowser.Model.Logging;
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using System;
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using System.Data;
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using System.Threading;
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namespace MediaBrowser.Server.Implementations.Persistence
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{
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class SqliteShrinkMemoryTimer : IDisposable
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{
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private Timer _shrinkMemoryTimer;
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private readonly SemaphoreSlim _writeLock;
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private readonly ILogger _logger;
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private readonly IDbConnection _connection;
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public SqliteShrinkMemoryTimer(IDbConnection connection, SemaphoreSlim writeLock, ILogger logger)
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{
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_connection = connection;
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_writeLock = writeLock;
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_logger = logger;
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_shrinkMemoryTimer = new Timer(TimerCallback, null, TimeSpan.FromMinutes(30), TimeSpan.FromMinutes(10));
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}
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private async void TimerCallback(object state)
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{
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await _writeLock.WaitAsync(CancellationToken.None).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.Transaction = transaction;
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cmd.CommandText = "pragma shrink_memory";
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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 items:", 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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public void Dispose()
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{
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if (_shrinkMemoryTimer != null)
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{
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_shrinkMemoryTimer.Dispose();
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_shrinkMemoryTimer = null;
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}
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}
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}
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}
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