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本次提交对系统进行了两项主要的重构和优化：

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1.  重构数据处理链:
      *   移除了 CheckValueChangedProcessor 和 LoggingProcessor，简化了数据处理流程。
      *   调整了 App.xaml.cs 中的处理器注册顺序，使处理链更加清晰。

  2.  优化OPC UA变量变更处理:
      *   完全重构了 OpcUaServiceManager 中的 OnVariableChanged 事件处理方法。
      *   新逻辑能够根据变量属性（IsActive, PollingInterval 等）的变化，进行精确的、针对单个节点的订阅和取消订阅操作，取代了之前重置整个设备订阅的低效方式。
      *   实现了对已删除变量的订阅取消逻辑，确保了资源的正确释放。

  这些变更显著提升了 OPC UA 订阅管理的效率和精确性。
This commit is contained in:
David P.G
2025-10-02 22:30:24 +08:00
parent c4a840c8b8
commit 745cd43513
5 changed files with 35 additions and 92 deletions
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30
DMS.Application/Services/Processors/CheckValueChangedProcessor.cs
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@@ -1,30 +0,0 @@
using DMS.Core.Models;
using DMS.Application.Interfaces;
using DMS.Application.Models;
namespace DMS.Application.Services.Processors;
public class CheckValueChangedProcessor : IVariableProcessor
{
public Task ProcessAsync(VariableContext context)
{
// Variable newVariable = context.Data;
// if (!_dataServices.AllVariables.TryGetValue(newVariable.Id, out Variable oldVariable))
// {
// NlogHelper.Warn($"检查变量值是否改变时在_dataServices.AllVariables中找不到Id:{newVariable.Id},Name:{newVariable.Name}的变量。");
// context.IsHandled = true;
// return Task.CompletedTask;
// }
// if (newVariable.DataValue == oldVariable.DataValue)
// {
// // 值没有变化，直接完成
// context.IsHandled = true;
// }
//
// 在这里处理 context.Data
return Task.CompletedTask;
}
}

22
DMS.Application/Services/Processors/LoggingProcessor.cs
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@@ -1,22 +0,0 @@
using DMS.Application.Interfaces;
using DMS.Application.Models;
namespace DMS.Application.Services.Processors;
/// <summary>
/// 一个简单的数据处理器实现，用于演示。
/// 其主要功能是记录接收到的变量数据的名称和值。
/// </summary>
public class LoggingProcessor : IVariableProcessor
{
public LoggingProcessor()
{
}
public Task ProcessAsync(VariableContext context)
{
// NlogHelper.Info($"处理数据: {context.Data.Name}, 值: {context.Data.DataValue}");
return Task.CompletedTask;
}
}

8
DMS.Application/Services/Processors/UpdateDbVariableProcessor.cs
View File

@@ -37,14 +37,6 @@ public class UpdateDbVariableProcessor : IVariableProcessor, IDisposable
public async Task ProcessAsync(VariableContext context)
{
// 检查新值是否有效，以及是否与旧值不同
if (context.NewValue == null || Equals(context.Data.DataValue, context.NewValue?.ToString()))
{
return; // 值未变或新值无效，跳过
}
// 用新值更新上下文中的数据，确保处理链的后续环节能看到最新值
context.Data.DataValue = context.NewValue?.ToString();
_queue.Enqueue(context.Data);

39
DMS.Infrastructure/Services/OpcUa/OpcUaServiceManager.cs
View File

@@ -488,7 +488,6 @@ namespace DMS.Infrastructure.Services.OpcUa
try
{
_logger.LogInformation("正在为设备 {DeviceName} 设置订阅，需要订阅的变量数: {VariableCount}",
context.Device.Name, context.Variables.Count);
@@ -665,6 +664,11 @@ namespace DMS.Infrastructure.Services.OpcUa
_logger.LogDebug("处理变量变更事件: 变量ID={VariableId}, 变更类型={ChangeType}, 变更属性={PropertyType}",
e.Variable.Id, e.ChangeType, e.PropertyType);
if (!_deviceContexts.TryGetValue(e.Variable.VariableTable.DeviceId, out var context))
{
return;
}
// 根据变更类型和属性类型进行相应处理
switch (e.ChangeType)
{
@@ -675,41 +679,39 @@ namespace DMS.Infrastructure.Services.OpcUa
case VariablePropertyType.OpcUaNodeId:
case VariablePropertyType.OpcUaUpdateType:
case VariablePropertyType.PollingInterval:
if (_deviceContexts.TryGetValue(e.Variable.VariableTable.DeviceId, out var context))
{
if (context.Variables.TryGetValue(e.Variable.OpcUaNodeId, out var variableDto))
{
if (variableDto.IsActive)
{
context.OpcUaService.UnsubscribeFromNode(e.Variable.OpcUaNodeId);
context.OpcUaService.SubscribeToNode(e.Variable.OpcUaNodeId,HandleDataChanged,e.Variable.PollingInterval,e.Variable.PollingInterval);
_logger.LogInformation($"OpcUa变量节点：{e.Variable.OpcUaNodeId},的轮询时间修改为:{e.Variable.PollingInterval}");
context.OpcUaService.SubscribeToNode(
e.Variable.OpcUaNodeId, HandleDataChanged, e.Variable.PollingInterval,
e.Variable.PollingInterval);
_logger.LogInformation(
$"OpcUa变量节点：{e.Variable.OpcUaNodeId},的轮询时间修改为:{e.Variable.PollingInterval}");
}
}
}
}
break;
case VariablePropertyType.IsActive:
// 变量激活状态变化
if (_deviceContexts.TryGetValue(e.Variable.VariableTable.DeviceId, out var context2))
{
if (e.Variable.IsActive)
{
// 添加变量到监控列表并重新订阅
if (context2.Variables.TryAdd(e.Variable.OpcUaNodeId, e.Variable))
if (context.Variables.TryAdd(e.Variable.OpcUaNodeId, e.Variable))
{
context2.OpcUaService.SubscribeToNode(e.Variable.OpcUaNodeId,HandleDataChanged,e.Variable.PollingInterval,e.Variable.PollingInterval);
context.OpcUaService.SubscribeToNode(
e.Variable.OpcUaNodeId, HandleDataChanged, e.Variable.PollingInterval,
e.Variable.PollingInterval);
}
}
else
{
// 从监控列表中移除变量并取消订阅
if (context2.Variables.TryRemove(e.Variable.OpcUaNodeId, out _))
if (context.Variables.TryRemove(e.Variable.OpcUaNodeId, out _))
{
context2.OpcUaService.UnsubscribeFromNode(e.Variable.OpcUaNodeId);
}
context.OpcUaService.UnsubscribeFromNode(e.Variable.OpcUaNodeId);
}
}
@@ -720,7 +722,12 @@ namespace DMS.Infrastructure.Services.OpcUa
case ActionChangeType.Deleted:
// 变量被删除时，取消订阅并从设备上下文的变量列表中移除
// await UnsubscribeVariableAsync(e.Variable);
// 从监控列表中移除变量并取消订阅
if (context.Variables.TryRemove(e.Variable.OpcUaNodeId, out _))
{
context.OpcUaService.UnsubscribeFromNode(e.Variable.OpcUaNodeId);
}
break;
}
}

6
DMS.WPF/App.xaml.cs
View File

@@ -80,11 +80,9 @@ public partial class App : System.Windows.Application
var dataProcessingService = Host.Services.GetRequiredService<IDataProcessingService>();
dataProcessingService.AddProcessor(Host.Services.GetRequiredService<ValueConvertProcessor>());
dataProcessingService.AddProcessor(Host.Services.GetRequiredService<UpdateViewProcessor>());
dataProcessingService.AddProcessor(Host.Services.GetRequiredService<CheckValueChangedProcessor>());
dataProcessingService.AddProcessor(Host.Services.GetRequiredService<LoggingProcessor>());
dataProcessingService.AddProcessor(Host.Services.GetRequiredService<HistoryProcessor>());
dataProcessingService.AddProcessor(Host.Services.GetRequiredService<MqttPublishProcessor>());
dataProcessingService.AddProcessor(Host.Services.GetRequiredService<UpdateDbVariableProcessor>());
dataProcessingService.AddProcessor(Host.Services.GetRequiredService<HistoryProcessor>());
// 添加报警处理器
dataProcessingService.AddProcessor(Host.Services.GetRequiredService<DMS.Application.Services.Processors.AlarmProcessor>());
// 添加触发器处理器
@@ -204,8 +202,6 @@ public partial class App : System.Windows.Application
(DataProcessingService)provider.GetRequiredService<IDataProcessingService>());
services.AddSingleton<ValueConvertProcessor>();
services.AddSingleton<UpdateViewProcessor>();
services.AddSingleton<CheckValueChangedProcessor>();
services.AddSingleton<LoggingProcessor>();
services.AddSingleton<UpdateDbVariableProcessor>();
services.AddSingleton<HistoryProcessor>();
services.AddSingleton<MqttPublishProcessor>();