127 lines
3.9 KiB
C#
127 lines
3.9 KiB
C#
// 大名科技（天津）有限公司版权所有 电话：18020030720 QQ：515096995
|
||
//
|
||
// 此源代码遵循位于源代码树根目录中的 LICENSE 文件的许可证
|
||
|
||
using System.Threading.Channels;
|
||
|
||
namespace Admin.NET.Core;
|
||
|
||
/// <summary>
|
||
/// Redis自定义事件源存储器
|
||
/// </summary>
|
||
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;
|
||
|
||
/// <summary>
|
||
/// Redis 连接对象
|
||
/// </summary>
|
||
private readonly FullRedis _redis;
|
||
|
||
/// <summary>
|
||
/// 路由键
|
||
/// </summary>
|
||
private readonly string _routeKey;
|
||
|
||
/// <summary>
|
||
/// 构造函数
|
||
/// </summary>
|
||
/// <param name="redis">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(ICache redis, string routeKey, int capacity)
|
||
{
|
||
// 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;
|
||
_routeKey = routeKey;
|
||
|
||
// 创建消息订阅者
|
||
_eventConsumer = new EventConsumer<ChannelEventSource>(_redis, _routeKey);
|
||
|
||
// 订阅消息写入 Channel
|
||
_eventConsumer.Received += (send, cr) =>
|
||
{
|
||
// 反序列化消息
|
||
//var eventSource = JsonConvert.DeserializeObject<ChannelEventSource>(cr);
|
||
|
||
// 写入内存管道存储器
|
||
_channel.Writer.WriteAsync(cr);
|
||
};
|
||
|
||
// 启动消费者
|
||
_eventConsumer.Start();
|
||
}
|
||
|
||
/// <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)
|
||
{
|
||
// 序列化消息
|
||
//var data = JsonSerializer.Serialize(source);
|
||
|
||
// 获取一个订阅对象
|
||
var queue = _redis.GetQueue<ChannelEventSource>(_routeKey);
|
||
|
||
// 异步发布
|
||
await Task.Factory.StartNew(() =>
|
||
{
|
||
queue.Add(source);
|
||
}, cancellationToken, TaskCreationOptions.LongRunning, System.Threading.Tasks.TaskScheduler.Default);
|
||
}
|
||
else
|
||
{
|
||
// 这里处理动态订阅问题
|
||
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);
|
||
}
|
||
} |