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https://gitee.com/ThingsGateway/ThingsGateway.git
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88 lines
2.6 KiB
C#
88 lines
2.6 KiB
C#
// ------------------------------------------------------------------------
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// 版权信息
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// 版权归百小僧及百签科技（广东）有限公司所有。
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// 所有权利保留。
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// 官方网站：https://baiqian.com
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//
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// 许可证信息
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// 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。
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// 许可证的完整文本可以在源代码树根目录中的 LICENSE-APACHE 和 LICENSE-MIT 文件中找到。
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// ------------------------------------------------------------------------
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using System.Reflection;
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using System.Text.Json;
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namespace ThingsGateway.EventBus;
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/// <summary>
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/// 事件处理程序上下文
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/// </summary>
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public abstract class EventHandlerContext
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{
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="eventSource">事件源（事件承载对象）</param>
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/// <param name="properties">共享上下文数据</param>
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/// <param name="handlerMethod">触发的方法</param>
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/// <param name="attribute">订阅特性</param>
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internal EventHandlerContext(IEventSource eventSource
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, IDictionary<object, object> properties
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, MethodInfo handlerMethod
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, EventSubscribeAttribute attribute)
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{
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Source = eventSource;
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Properties = properties;
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HandlerMethod = handlerMethod;
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Attribute = attribute;
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}
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/// <summary>
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/// 事件源（事件承载对象）
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/// </summary>
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public IEventSource Source { get; }
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/// <summary>
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/// 共享上下文数据
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/// </summary>
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public IDictionary<object, object> Properties { get; set; }
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/// <summary>
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/// 触发的方法
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/// </summary>
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/// <remarks>如果是动态订阅，可能为 null</remarks>
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public MethodInfo HandlerMethod { get; }
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/// <summary>
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/// 订阅特性
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/// </summary>
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/// <remarks><remarks>如果是动态订阅，可能为 null</remarks></remarks>
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public EventSubscribeAttribute Attribute { get; }
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private static JsonSerializerOptions JsonSerializerOptions = new JsonSerializerOptions(JsonSerializerOptions.Default)
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{
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PropertyNameCaseInsensitive = true
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};
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/// <summary>
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/// 获取负载数据
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <returns></returns>
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public T GetPayload<T>()
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{
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var rawPayload = Source.Payload;
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if (rawPayload is null)
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{
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return default;
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}
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else if (rawPayload is JsonElement jsonElement)
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{
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return JsonSerializer.Deserialize<T>(jsonElement.GetRawText(), JsonSerializerOptions);
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}
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else
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{
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return (T)rawPayload;
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}
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}
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} |