86 lines
3.1 KiB
C#
86 lines
3.1 KiB
C#
using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Hosting;
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using Quartz.Logging;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Channels;
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using System.Threading.Tasks;
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namespace VolPro.Core.BackgroundServices.mail
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{
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/// <summary>
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/// 邮件后台服务，使用Channel队列处理邮件发送
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/// </summary>
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public class MailBackgroundService : BackgroundService
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{
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private readonly IServiceProvider _serviceProvider;
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public MailBackgroundService(IServiceProvider serviceProvider)
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{
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_serviceProvider = serviceProvider;
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}
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protected override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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Console.WriteLine("发送邮件服务已启动");
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while (!stoppingToken.IsCancellationRequested)
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{
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try
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{
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// 从队列中读取邮件请求
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var mailRequest = await MailService.MailQueue.Reader.ReadAsync(stoppingToken);
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if (mailRequest.RetryCount > mailRequest.MaxRetryCount)
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{
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break;
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}
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using (var scope = _serviceProvider.CreateScope())
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{
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var mailService = scope.ServiceProvider.GetRequiredService<IMailService>();
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try
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{
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await mailService.SendAsync(mailRequest.MailMessage.To,
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mailRequest.MailMessage.Subject,
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mailRequest.MailMessage.Body,
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mailRequest.MailMessage.IsHtml);
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}
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catch (Exception ex)
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{
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mailRequest.RetryCount++;
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Console.WriteLine($"邮件发送异常:{ex.Message + ex.StackTrace}");
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Core.Services.Logger.AddAsync($"邮件发送异常:{ex.Message + ex.StackTrace}");
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}
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}
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}
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catch (ChannelClosedException)
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{
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// 队列已关闭，退出循环
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break;
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}
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catch (OperationCanceledException)
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{
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// 取消令牌触发，退出循环
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break;
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}
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catch (Exception)
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{
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// 邮件队列处理出现未知错误，短暂延迟后继续处理
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await Task.Delay(TimeSpan.FromSeconds(5), stoppingToken);
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}
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}
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}
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public override async Task StopAsync(CancellationToken cancellationToken)
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{
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// 关闭队列写入器
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MailService.MailQueue.Writer.Complete();
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// 等待所有待处理的邮件完成
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await base.StopAsync(cancellationToken);
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}
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}
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}
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