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- // Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
- //
- // 本项目主要遵循 MIT 许可证和 Apache 许可证(版本 2.0)进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
- //
- // 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动!任何基于本项目二次开发而产生的一切法律纠纷和责任,我们不承担任何责任!
- using NewLife.Caching.Queues;
- using Newtonsoft.Json;
- using System.Threading.Channels;
- namespace Admin.NET.Core;
- /// <summary>
- /// Redis自定义事件源存储器
- /// </summary>
- /// <remarks>
- /// 在集群部署时,一般每一个消息只由一个服务节点消费一次。
- /// 有些特殊情情要通知到服务器群中的每一个节点(比如需要强制加载某些配置、重点服务等),
- /// 在这种情况下就要以“broadcast:”开头来定义EventId,
- /// 本系统会把“broadcast:”开头的事件视为“广播消息”保证集群中的每一个服务节点都能消费得到这个消息
- /// </remarks>
- public sealed class RedisEventSourceStorer : IEventSourceStorer, IDisposable
- {
- /// <summary>
- /// 消费者
- /// </summary>
- private readonly EventConsumer<ChannelEventSource> _eventConsumer;
- /// <summary>
- /// 内存通道事件源存储器
- /// </summary>
- private readonly Channel<IEventSource> _channel;
- private IProducerConsumer<ChannelEventSource> _queueSingle;
- private RedisStream<string> _queueBroadcast;
- private ILogger<RedisEventSourceStorer> _logger;
- /// <summary>
- /// 构造函数
- /// </summary>
- /// <param name="cacheProvider">Redis 连接对象</param>
- /// <param name="routeKey">路由键</param>
- /// <param name="capacity">存储器最多能够处理多少消息,超过该容量进入等待写入</param>
- public RedisEventSourceStorer(ICacheProvider cacheProvider, string routeKey, int capacity)
- {
- _logger = App.GetRequiredService<ILogger<RedisEventSourceStorer>>();
- // 配置通道,设置超出默认容量后进入等待
- var boundedChannelOptions = new BoundedChannelOptions(capacity)
- {
- FullMode = BoundedChannelFullMode.Wait
- };
- // 创建有限容量通道
- _channel = Channel.CreateBounded<IEventSource>(boundedChannelOptions);
- //_redis = redis as FullRedis;
- // 创建广播消息订阅者,即所有服务器节点都能收到消息(用来发布重启、Reload配置等消息)
- FullRedis redis = (FullRedis)cacheProvider.Cache;
- var clusterOpt = App.GetConfig<ClusterOptions>("Cluster", true);
- _queueBroadcast = redis.GetStream<string>(routeKey + ":broadcast");
- _queueBroadcast.Group = clusterOpt.ServerId;//根据服务器标识分配到不同的分组里
- _queueBroadcast.Expire = TimeSpan.FromSeconds(10);//消息10秒过期()
- _queueBroadcast.ConsumeAsync(OnConsumeBroadcast);
- // 创建队列消息订阅者,只要有一个服务节点消费了消息即可
- _queueSingle = redis.GetQueue<ChannelEventSource>(routeKey + ":single");
- _eventConsumer = new EventConsumer<ChannelEventSource>(_queueSingle);
- // 订阅消息写入 Channel
- _eventConsumer.Received += async (send, cr) =>
- {
- // var oriColor = Console.ForegroundColor;
- try
- {
- ChannelEventSource ces = (ChannelEventSource)cr;
- await ConsumeChannelEventSourceAsync(ces, ces.CancellationToken);
- }
- catch (Exception e)
- {
- _logger.LogError(e, "处理Received中的消息产生错误!");
- }
- };
- _eventConsumer.Start();
- }
- private async Task OnConsumeBroadcast(string source, Message message, CancellationToken token)
- {
- ChannelEventSource ces = JsonConvert.DeserializeObject<ChannelEventSource>(source);
- await ConsumeChannelEventSourceAsync(ces, token);
- }
- private async Task ConsumeChannelEventSourceAsync(ChannelEventSource ces, CancellationToken cancel = default)
- {
- // 打印测试事件
- if (ces.EventId != null && ces.EventId.IndexOf(":Test") > 0)
- {
- var oriColor = Console.ForegroundColor;
- Console.ForegroundColor = ConsoleColor.Green;
- Console.WriteLine($"有消息要处理{ces.EventId},{ces.Payload}");
- Console.ForegroundColor = oriColor;
- }
- await _channel.Writer.WriteAsync(ces, cancel);
- }
- /// <summary>
- /// 将事件源写入存储器
- /// </summary>
- /// <param name="eventSource">事件源对象</param>
- /// <param name="cancellationToken">取消任务 Token</param>
- /// <returns><see cref="ValueTask"/></returns>
- public async ValueTask WriteAsync(IEventSource eventSource, CancellationToken cancellationToken)
- {
- // 空检查
- if (eventSource == default)
- throw new ArgumentNullException(nameof(eventSource));
- // 这里判断是否是 ChannelEventSource 或者 自定义的 EventSource
- if (eventSource is ChannelEventSource source)
- {
- // 异步发布
- await Task.Factory.StartNew(() =>
- {
- if (source.EventId != null && source.EventId.StartsWith("broadcast:"))
- {
- string str = JsonConvert.SerializeObject(source);
- _queueBroadcast.Add(str);
- }
- else
- {
- _queueSingle.Add(source);
- }
- }, cancellationToken, TaskCreationOptions.LongRunning, System.Threading.Tasks.TaskScheduler.Default);
- }
- else
- {
- // 处理动态订阅问题
- await _channel.Writer.WriteAsync(eventSource, cancellationToken);
- }
- }
- /// <summary>
- /// 从存储器中读取一条事件源
- /// </summary>
- /// <param name="cancellationToken">取消任务 Token</param>
- /// <returns>事件源对象</returns>
- public async ValueTask<IEventSource> ReadAsync(CancellationToken cancellationToken)
- {
- // 读取一条事件源
- var eventSource = await _channel.Reader.ReadAsync(cancellationToken);
- return eventSource;
- }
- /// <summary>
- /// 释放非托管资源
- /// </summary>
- public async void Dispose()
- {
- await _eventConsumer.Stop();
- GC.SuppressFinalize(this);
- }
- }
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