152 lines
6.1 KiB
C#
152 lines
6.1 KiB
C#
/*
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*
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* (c) Copyright Ascensio System Limited 2010-2020
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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using System;
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using System.Linq;
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using System.Threading;
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using ASC.Common;
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using ASC.Common.Logging;
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using ASC.Data.Backup.Storage;
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using Microsoft.Extensions.Options;
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namespace ASC.Data.Backup.Service
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{
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public class BackupCleanerService
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{
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private readonly object cleanerLock = new object();
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private Timer cleanTimer;
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private bool isStarted;
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private readonly ILog log;
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public TimeSpan Period { get; set; }
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private readonly BackupStorageFactory backupStorageFactory;
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public BackupCleanerService(IOptionsMonitor<ILog> options, BackupStorageFactory backupStorageFactory)
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{
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this.backupStorageFactory = backupStorageFactory;
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log = options.CurrentValue;
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Period = TimeSpan.FromMinutes(15);
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}
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public void Start()
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{
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if (!isStarted && Period > TimeSpan.Zero)
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{
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log.Info("starting backup cleaner service...");
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cleanTimer = new Timer(_ => DeleteExpiredBackups(), null, TimeSpan.Zero, Period);
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log.Info("backup cleaner service started");
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isStarted = true;
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}
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}
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public void Stop()
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{
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if (isStarted)
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{
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log.Info("stopping backup cleaner service...");
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if (cleanTimer != null)
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{
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cleanTimer.Change(Timeout.Infinite, Timeout.Infinite);
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cleanTimer.Dispose();
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cleanTimer = null;
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}
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log.Info("backup cleaner service stopped");
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isStarted = false;
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}
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}
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private void DeleteExpiredBackups()
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{
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if (Monitor.TryEnter(cleanerLock))
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{
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try
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{
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log.Debug("started to clean expired backups");
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var backupRepository = backupStorageFactory.GetBackupRepository();
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var backupsToRemove = backupRepository.GetExpiredBackupRecords();
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log.DebugFormat("found {0} backups which are expired", backupsToRemove.Count);
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if (!isStarted) return;
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foreach (var scheduledBackups in backupRepository.GetScheduledBackupRecords().GroupBy(r => r.TenantId))
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{
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if (!isStarted) return;
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var schedule = backupRepository.GetBackupSchedule(scheduledBackups.Key);
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if (schedule != null)
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{
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var scheduledBackupsToRemove = scheduledBackups.OrderByDescending(r => r.CreatedOn).Skip(schedule.BackupsStored).ToList();
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if (scheduledBackupsToRemove.Any())
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{
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log.DebugFormat("only last {0} scheduled backup records are to keep for tenant {1} so {2} records must be removed", schedule.BackupsStored, schedule.TenantId, scheduledBackupsToRemove.Count);
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backupsToRemove.AddRange(scheduledBackupsToRemove);
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}
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}
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else
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{
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backupsToRemove.AddRange(scheduledBackups);
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}
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}
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foreach (var backupRecord in backupsToRemove)
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{
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if (!isStarted) return;
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try
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{
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var backupStorage = backupStorageFactory.GetBackupStorage(backupRecord);
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if (backupStorage == null) continue;
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backupStorage.Delete(backupRecord.StoragePath);
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backupRepository.DeleteBackupRecord(backupRecord.Id);
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}
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catch (Exception error)
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{
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log.Warn("can't remove backup record: {0}", error);
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}
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}
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}
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catch (Exception error)
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{
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log.Error("error while cleaning expired backup records: {0}", error);
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}
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finally
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{
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Monitor.Exit(cleanerLock);
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}
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}
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}
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}
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public static class BackupCleanerServiceExtension
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{
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public static DIHelper AddBackupCleanerService(this DIHelper services)
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{
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services.TryAddScoped<BackupCleanerService>();
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return services;
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}
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}
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}
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