92 lines
3.6 KiB
C#
92 lines
3.6 KiB
C#
using Microsoft.EntityFrameworkCore;
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using Microsoft.Extensions.Logging;
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using PARR.Common.Domain;
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using PARR.Constants;
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using PARR.DAL.Models;
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using PARR.DAL.Services.Interfaces;
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using PARR.TemplateMatcher.Services.Interfaces;
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namespace PARR.TemplateMatcher.Services.Implementations;
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internal class TemplateReuser : ITemplateReuser
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{
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private const int UnusedCandidateBatchSize = 10;
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private readonly ILogger<TemplateReuser> logger;
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private readonly ITemplateService templateService;
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public TemplateReuser(
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ILogger<TemplateReuser> logger,
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ITemplateService templateService)
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{
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this.logger = logger;
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this.templateService = templateService;
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}
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public async Task<Template?> TryReuseOneUnusedTemplateAsync(
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Guid jobId,
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Guid unitId,
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HistoryInitiator initiator,
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int maxAttempts = 3)
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{
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for (int attempt = 1; attempt <= maxAttempts; attempt++)
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{
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try
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{
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var unusedCandidates = await templateService.Get()
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.Where(t => t.StatusTypeId == TemplateStatusTypeEnum.Unused)
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.OrderBy(t => t.DateModified ?? t.DateCreated)
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.Take(UnusedCandidateBatchSize)
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.ToListAsync();
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if (!unusedCandidates.Any())
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{
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logger.LogDebug("Нет Unused-шаблонов (попытка {Attempt}).", attempt);
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return null;
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}
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foreach (var candidate in unusedCandidates)
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{
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var originalStatus = candidate.StatusTypeId;
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var originalModified = candidate.DateModified;
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try
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{
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candidate.StatusTypeId = TemplateStatusTypeEnum.Updating;
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candidate.DateModified = DateTimeOffset.UtcNow;
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if (await templateService.CommitAsync(initiator))
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{
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logger.LogInformation("Успешно захвачен шаблон {TemplateId} для переиспользования (попытка {Attempt}).",
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candidate.Id, attempt);
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return candidate; // Возвращаем захваченный шаблон
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}
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// Откат при неудаче
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candidate.StatusTypeId = originalStatus;
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candidate.DateModified = originalModified;
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}
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catch (Exception ex) when (
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ex is DbUpdateException ||
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ex.InnerException?.Message.Contains("deadlock", StringComparison.OrdinalIgnoreCase) == true ||
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ex.InnerException?.Message.Contains("timeout", StringComparison.OrdinalIgnoreCase) == true)
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{
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logger.LogWarning(ex, "Конфликт при захвате шаблона {TemplateId} (попытка {Attempt}).", candidate.Id, attempt);
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candidate.StatusTypeId = originalStatus;
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candidate.DateModified = originalModified;
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}
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}
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if (attempt < maxAttempts)
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await Task.Delay(Random.Shared.Next(5, 15) * attempt);
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}
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catch (Exception ex)
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{
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logger.LogError(ex, "Ошибка в попытке захвата (попытка {Attempt}).", attempt);
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if (attempt == maxAttempts) throw;
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}
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}
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return null;
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}
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} |