DocSpace-buildtools/common/services/ASC.Notify/NotifyCleaner.cs

/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that 
 * Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
 *
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/

namespace ASC.Notify;

[Singletone]
public class NotifyCleaner : IDisposable
{
    private readonly ILog _logger;
    private readonly ManualResetEvent _stop = new ManualResetEvent(false);
    public NotifyServiceCfg NotifyServiceCfg { get; }
    private readonly IServiceProvider _serviceProvider;
    public readonly CancellationTokenSource _cancellationTokenSource;

    public NotifyCleaner(IOptions<NotifyServiceCfg> notifyServiceCfg, IServiceProvider serviceProvider, IOptionsMonitor<ILog> options)
    {
        _logger = options.Get("ASC.Notify");
        NotifyServiceCfg = notifyServiceCfg.Value;
        _serviceProvider = serviceProvider;
        _cancellationTokenSource = new CancellationTokenSource();
    }

    public void Start()
    {
        var t = new Task(Clear, _cancellationTokenSource.Token, TaskCreationOptions.LongRunning);
        t.Start(TaskScheduler.Default);
    }

    public void Stop()
    {
        _stop.Set();
        _cancellationTokenSource.Cancel();
    }

    private void Clear()
    {
        while (true)
        {
            try
            {
                var date = DateTime.UtcNow.AddDays(-NotifyServiceCfg.StoreMessagesDays);

                using var scope = _serviceProvider.CreateScope();
                using var dbContext = scope.ServiceProvider.GetService<DbContextManager<NotifyDbContext>>().Get(NotifyServiceCfg.ConnectionStringName);
                using var tx = dbContext.Database.BeginTransaction();

                var info = dbContext.NotifyInfo.Where(r => r.ModifyDate < date && r.State == 4).ToList();
                var queue = dbContext.NotifyQueue.Where(r => r.CreationDate < date).ToList();
                dbContext.NotifyInfo.RemoveRange(info);
                dbContext.NotifyQueue.RemoveRange(queue);

                dbContext.SaveChanges();
                tx.Commit();

                _logger.InfoFormat("Clear notify messages: notify_info({0}), notify_queue ({1})", info.Count, queue.Count);

            }
            catch (ThreadAbortException)
            {
                // ignore
            }
            catch (Exception err)
            {
                _logger.Error(err);
            }
            if (_stop.WaitOne(TimeSpan.FromHours(8)))
            {
                break;
            }
        }
    }

    public void Dispose()
    {
        if (_cancellationTokenSource != null)
        {
            _cancellationTokenSource.Dispose();
        }
    }
}