150 lines
5.9 KiB
C#
150 lines
5.9 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.Data.Backup.Services;
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[Singletone]
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internal sealed class BackupCleanerService : BackgroundService
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{
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private readonly ILogger _logger;
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private readonly TimeSpan _backupCleanerPeriod;
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private readonly IServiceScopeFactory _scopeFactory;
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public BackupCleanerService(
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ConfigurationExtension configuration,
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ILogger<BackupCleanerService> logger,
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IServiceScopeFactory scopeFactory)
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{
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_scopeFactory = scopeFactory;
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_logger = logger;
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_backupCleanerPeriod = configuration.GetSetting<BackupSettings>("backup").Cleaner.Period;
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}
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protected override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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_logger.LogDebug("BackupCleanerService is starting.");
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stoppingToken.Register(() => _logger.LogDebug("#1 BackupCleanerService background task is stopping."));
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while (!stoppingToken.IsCancellationRequested)
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{
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_logger.LogDebug("BackupCleanerService background task is doing background work.");
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using var serviceScope = _scopeFactory.CreateScope();
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var registerInstanceService = serviceScope.ServiceProvider.GetService<IRegisterInstanceManager<BackupCleanerService>>();
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if (!await registerInstanceService.IsActive(RegisterInstanceWorkerService<BackupCleanerService>.InstanceId))
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{
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_logger.LogDebug($"BackupCleanerService background task with instance id {RegisterInstanceWorkerService<BackupCleanerService>.InstanceId} is't active.");
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await Task.Delay(1000, stoppingToken);
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continue;
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}
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ExecuteBackupCleaner(stoppingToken);
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await Task.Delay(_backupCleanerPeriod, stoppingToken);
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}
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_logger.LogDebug("BackupCleanerService background task is stopping.");
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}
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private void ExecuteBackupCleaner(CancellationToken stoppingToken)
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{
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using var serviceScope = _scopeFactory.CreateScope();
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var backupRepository = serviceScope.ServiceProvider.GetRequiredService<BackupRepository>();
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var backupStorageFactory = serviceScope.ServiceProvider.GetRequiredService<BackupStorageFactory>();
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_logger.LogDebug("started to clean expired backups");
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var backupsToRemove = backupRepository.GetExpiredBackupRecords();
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_logger.LogDebug("found {0} backups which are expired", backupsToRemove.Count);
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foreach (var scheduledBackups in backupRepository.GetScheduledBackupRecords().GroupBy(r => r.TenantId))
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{
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if (stoppingToken.IsCancellationRequested)
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{
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return;
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}
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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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_logger.LogDebug("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 (stoppingToken.IsCancellationRequested)
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{
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return;
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}
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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)
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{
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continue;
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}
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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 (ProviderInfoArgumentException error)
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{
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_logger.LogWarning(error, "can't remove backup record " + backupRecord.Id);
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if (DateTime.UtcNow > backupRecord.CreatedOn.AddMonths(6))
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{
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backupRepository.DeleteBackupRecord(backupRecord.Id);
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}
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}
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catch (Exception error)
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{
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_logger.LogWarning(error, "can't remove backup record: " + backupRecord.Id);
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}
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}
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}
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}
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