修复了设备在启动和停止时的一些逻辑错误。
This commit is contained in:
@@ -1,172 +1,193 @@
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Collections.Concurrent;
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using Microsoft.Extensions.Hosting;
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using Opc.Ua;
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using Opc.Ua.Client;
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using Opc.Ua.Configuration;
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using PMSWPF.Enums;
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using PMSWPF.Helper;
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using PMSWPF.Models;
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namespace PMSWPF.Services
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{
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public class OpcUaBackgroundService
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public class OpcUaBackgroundService : BackgroundService
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{
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private readonly DataServices _dataServices;
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private readonly IDataProcessingService _dataProcessingService;
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// 存储 OPC UA 设备，键为设备Id，值为会话对象。
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private readonly Dictionary<int, Device> _deviceDic;
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private readonly ConcurrentDictionary<int, Device> _deviceDic;
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// 存储 OPC UA 会话，键为终结点 URL，值为会话对象。
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private readonly Dictionary<string, Session> _sessionsDic;
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private readonly ConcurrentDictionary<string, Session> _sessionsDic;
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// 存储 OPC UA 订阅，键为终结点 URL，值为订阅对象。
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private readonly Dictionary<string, Subscription> _subscriptionsDic;
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private readonly ConcurrentDictionary<string, Subscription> _subscriptionsDic;
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// 存储活动的 OPC UA 变量，键为变量的OpcNodeId
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private readonly Dictionary<string, VariableData> _opcUaNodeIdVariableDic; // Key: VariableData.Id
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private readonly ConcurrentDictionary<string, VariableData> _opcUaNodeIdVariableDic;
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// 储存所有要轮询更新的变量，键是Device.Id,值是这个设备所有要轮询的变量
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private readonly Dictionary<int, List<VariableData>> _pollVariableDic; // Key: VariableData.Id
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private readonly ConcurrentDictionary<int, List<VariableData>> _pollVariableDic;
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// 储存所有要订阅更新的变量，键是Device.Id,值是这个设备所有要轮询的变量
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private readonly Dictionary<int, List<VariableData>> _subVariableDic;
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private readonly ConcurrentDictionary<int, List<VariableData>> _subVariableDic;
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private readonly SemaphoreSlim _reloadSemaphore = new SemaphoreSlim(0);
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// 后台服务的主线程，负责连接服务器，加载变量，订阅变量
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private Thread _serviceMainThread;
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// OPC UA 轮询间隔（毫秒）
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private readonly int OpcUaPollIntervalMs = 100;
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// 轮询线程
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private Thread _pollThread;
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// OPC UA 订阅发布间隔（毫秒）
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private readonly int OpcUaSubscriptionPublishingIntervalMs = 1000;
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// 重新加载事件
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private readonly ManualResetEvent _reloadEvent = new ManualResetEvent(false);
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// OPC UA 订阅采样间隔（毫秒）
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private readonly int OpcUaSubscriptionSamplingIntervalMs = 1000;
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// 停止事件,触发后会停止整个Opc后台服务
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private readonly ManualResetEvent _stopdEvent = new ManualResetEvent(false);
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/// <summary>
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/// OpcUaBackgroundService 的构造函数。
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/// </summary>
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/// <param name="dataServices">数据服务，用于访问数据库中的变量信息。</param>
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public OpcUaBackgroundService(DataServices dataServices)
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public OpcUaBackgroundService(DataServices dataServices, IDataProcessingService dataProcessingService)
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{
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_dataServices = dataServices;
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_sessionsDic = new Dictionary<string, Session>();
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_subscriptionsDic = new Dictionary<string, Subscription>();
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_opcUaNodeIdVariableDic = new();
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_pollVariableDic = new();
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_subVariableDic = new();
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_deviceDic = new();
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}
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_dataProcessingService = dataProcessingService;
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_deviceDic = new ConcurrentDictionary<int, Device>();
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_sessionsDic = new ConcurrentDictionary<string, Session>();
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_subscriptionsDic = new ConcurrentDictionary<string, Subscription>();
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_opcUaNodeIdVariableDic = new ConcurrentDictionary<string, VariableData>();
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_pollVariableDic = new ConcurrentDictionary<int, List<VariableData>>();
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_subVariableDic = new ConcurrentDictionary<int, List<VariableData>>();
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/// <summary>
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/// 后台服务的主执行方法。
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/// </summary>
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/// <param name="stoppingToken">用于通知服务停止的取消令牌。</param>
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/// <returns>表示异步操作的任务。</returns>
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public void StartService()
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{
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NlogHelper.Info("OPC UA 服务正在启动...");
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_reloadEvent.Set();
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_serviceMainThread = new Thread(Execute);
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_serviceMainThread.IsBackground = true;
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_serviceMainThread.Name = "OpcUaServiceThread";
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_serviceMainThread.Start();
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}
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public void StopService()
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{
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NlogHelper.Info("OPC UA 服务正在停止...");
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_stopdEvent.Set();
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DisconnectAllOpcUaSessions();
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_reloadEvent.Close();
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_stopdEvent.Close();
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NlogHelper.Info("OPC UA 服务已经停止。");
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}
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private void Execute()
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{
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// 订阅变量数据变化事件，以便在变量配置发生变化时重新加载。
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_dataServices.OnDeviceListChanged += HandleDeviceListChanged;
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_dataServices.OnDeviceIsActiveChanged += HandleDeviceIsActiveChanged;
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}
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while (!_stopdEvent.WaitOne(0))
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protected override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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NlogHelper.Info("OPC UA 后台服务正在启动。");
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_reloadSemaphore.Release(); // Initial trigger to load variables and connect
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try
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{
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_reloadEvent.WaitOne();
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if (_dataServices.Devices == null || _dataServices.Devices.Count == 0)
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while (!stoppingToken.IsCancellationRequested)
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{
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_reloadEvent.Reset();
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continue;
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await _reloadSemaphore.WaitAsync(stoppingToken); // Wait for a reload signal
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if (stoppingToken.IsCancellationRequested)
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{
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break;
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}
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if (_dataServices.Devices == null || _dataServices.Devices.Count == 0)
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{
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NlogHelper.Info("没有可用的OPC UA设备，等待设备列表更新...");
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continue;
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}
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var isLoaded = LoadVariables();
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if (!isLoaded)
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{
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NlogHelper.Info("加载变量过程中发生了错误，停止后面的操作。");
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continue;
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}
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await ConnectOpcUaServiceAsync(stoppingToken);
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await SetupOpcUaSubscriptionAsync(stoppingToken);
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NlogHelper.Info("OPC UA 后台服务已启动。");
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// 持续轮询，直到取消请求或需要重新加载
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while (!stoppingToken.IsCancellationRequested && _reloadSemaphore.CurrentCount == 0)
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{
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await PollOpcUaVariableOnceAsync(stoppingToken);
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await Task.Delay(OpcUaPollIntervalMs, stoppingToken);
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}
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}
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NlogHelper.Info("OpcUa后台服务开始加载变量...");
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// 初始化时加载所有活动的 OPC UA 变量。
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LoadOpcUaVariables();
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//连接服务器
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ConnectOpcUaService();
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// // 添加订阅变量
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SetupOpcUaSubscription();
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if (_pollThread == null)
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{
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_pollThread = new Thread(PollOpcUaVariable);
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_pollThread.IsBackground = true;
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_pollThread.Name = "OpcUaPollThread";
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_pollThread.Start();
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}
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NlogHelper.Info("OpcUa后台服务已启动。");
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_reloadEvent.Reset();
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}
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// 循环运行，直到接收到停止信号。
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// while (!stoppingToken.IsCancellationRequested)
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// {
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// // 可以在这里添加周期性任务，例如检查和重新连接断开的会话。
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// await Task.Delay(TimeSpan.FromSeconds(10), stoppingToken);
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// }
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NlogHelper.Info("OpcUa后台服务正在停止。");
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// 服务停止时，取消订阅事件并断开所有 OPC UA 连接。
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_dataServices.OnDeviceListChanged -= HandleDeviceListChanged;
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catch (OperationCanceledException)
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{
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NlogHelper.Info("OPC UA 后台服务已停止。");
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}
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catch (Exception e)
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{
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NlogHelper.Error($"OPC UA 后台服务运行中发生了错误:{e.Message}", e);
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}
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finally
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{
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await DisconnectAllOpcUaSessionsAsync();
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_dataServices.OnDeviceListChanged -= HandleDeviceListChanged;
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_dataServices.OnDeviceIsActiveChanged -= HandleDeviceIsActiveChanged;
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}
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}
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private void HandleDeviceListChanged(List<Device> devices)
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{
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NlogHelper.Info("变量数据已更改。正在重新加载 OPC UA 变量。");
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_reloadEvent.Set();
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NlogHelper.Info("设备列表已更改。OPC UA 客户端可能需要重新初始化。");
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_reloadSemaphore.Release(); // 触发ExecuteAsync中的全面重新加载
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}
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private async void HandleDeviceIsActiveChanged(Device device, bool isActive)
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{
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if (device.ProtocolType != ProtocolType.OpcUA)
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return;
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NlogHelper.Info($"设备 {device.Name} (ID: {device.Id}) 的IsActive状态改变为 {isActive}。");
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if (!isActive)
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{
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// 设备变为非活动状态，断开连接
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if (_sessionsDic.TryRemove(device.OpcUaEndpointUrl, out var session))
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{
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try
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{
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if (_subscriptionsDic.TryRemove(device.OpcUaEndpointUrl, out var subscription))
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{
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// 删除订阅。
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await subscription.DeleteAsync(true);
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NlogHelper.Info($"已删除设备 {device.Name} ({device.OpcUaEndpointUrl}) 的订阅。");
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}
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if (session.Connected)
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{
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await session.CloseAsync();
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NotificationHelper.ShowSuccess($"已断开设备 {device.Name} ({device.OpcUaEndpointUrl}) 的连接。");
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}
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}
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catch (Exception ex)
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{
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NlogHelper.Error($"断开设备 {device.Name} ({device.OpcUaEndpointUrl}) 连接时发生错误：{ex.Message}", ex);
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}
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}
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}
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// 触发重新加载，让LoadVariables和ConnectOpcUaServiceAsync处理设备列表的更新
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_reloadSemaphore.Release();
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}
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/// <summary>
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/// 从数据库加载所有活动的 OPC UA 变量，并进行相应的连接和订阅管理。
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/// </summary>
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private void LoadOpcUaVariables()
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private bool LoadVariables()
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{
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try
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{
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var _opcUaDevices = _dataServices
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.Devices.Where(d => d.ProtocolType == ProtocolType.OpcUA && d.IsActive == true)
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.ToList();
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if (_opcUaDevices.Count == 0)
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return;
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_deviceDic.Clear();
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_pollVariableDic.Clear();
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_subVariableDic.Clear();
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_opcUaNodeIdVariableDic.Clear();
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foreach (var opcUaDevice in _opcUaDevices)
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NlogHelper.Info("开始加载OPC UA变量....");
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var opcUaDevices = _dataServices
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.Devices.Where(d => d.ProtocolType == ProtocolType.OpcUA && d.IsActive == true)
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.ToList();
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if (opcUaDevices.Count == 0)
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{
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// 将设备保存到字典中，方便之后查找
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_deviceDic.Add(opcUaDevice.Id, opcUaDevice);
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NlogHelper.Info("没有找到活动的OPC UA设备。");
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return true; // No active devices, but not an error
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}
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int totalPollVariableCount = 0;
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int totalSubVariableCount = 0;
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foreach (var opcUaDevice in opcUaDevices)
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{
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_deviceDic.AddOrUpdate(opcUaDevice.Id, opcUaDevice, (key, oldValue) => opcUaDevice);
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//查找设备中所有要轮询的变量
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var dPollList = opcUaDevice.VariableTables?.SelectMany(vt => vt.DataVariables)
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.Where(vd => vd.IsActive == true &&
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@@ -176,258 +197,392 @@ namespace PMSWPF.Services
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// 将变量保存到字典中，方便Read后还原
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foreach (var variableData in dPollList)
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{
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_opcUaNodeIdVariableDic.Add(variableData.OpcUaNodeId, variableData);
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_opcUaNodeIdVariableDic.AddOrUpdate(variableData.OpcUaNodeId, variableData,
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(key, oldValue) => variableData);
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}
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NlogHelper.Info($"加载OpcUa轮询变量：{dPollList.Count}个");
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_pollVariableDic.Add(opcUaDevice.Id, dPollList);
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totalPollVariableCount += dPollList.Count;
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_pollVariableDic.AddOrUpdate(opcUaDevice.Id, dPollList, (key, oldValue) => dPollList);
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//查找设备中所有要订阅的变量
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var dSubList = opcUaDevice.VariableTables?.SelectMany(vt => vt.DataVariables)
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.Where(vd => vd.IsActive == true &&
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vd.ProtocolType == ProtocolType.OpcUA &&
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vd.OpcUaUpdateType == OpcUaUpdateType.OpcUaSubscription)
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.ToList();
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_subVariableDic.Add(opcUaDevice.Id, dSubList);
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NlogHelper.Info($"加载OpcUa订阅变量：{dSubList.Count}个");
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totalSubVariableCount += dSubList.Count;
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_subVariableDic.AddOrUpdate(opcUaDevice.Id, dSubList, (key, oldValue) => dSubList);
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}
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NlogHelper.Info(
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$"OPC UA 变量加载成功，共加载OPC UA设备：{opcUaDevices.Count}个，轮询变量数：{totalPollVariableCount}，订阅变量数：{totalSubVariableCount}");
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return true;
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}
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catch (Exception e)
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{
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NotificationHelper.ShowError($"加载OpcUa变量的过程中发生了错误：{e.Message}");
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NotificationHelper.ShowError($"加载OPC UA变量的过程中发生了错误：{e.Message}", e);
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return false;
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}
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}
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/// <summary>
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/// 连接到 OPC UA 服务器并订阅或轮询指定的变量。
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/// </summary>
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private void ConnectOpcUaService()
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private async Task ConnectOpcUaServiceAsync(CancellationToken stoppingToken)
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{
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foreach (Device device in _deviceDic.Values)
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if (stoppingToken.IsCancellationRequested)
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{
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Session session = null;
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// 检查是否已存在到该终结点的活动会话。
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if (_sessionsDic.TryGetValue(device.OpcUaEndpointUrl, out session) && session.Connected)
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return;
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}
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var connectTasks = new List<Task>();
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// 遍历_deviceDic中的所有设备，尝试连接
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foreach (var device in _deviceDic.Values.ToList())
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{
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connectTasks.Add(ConnectSingleOpcUaDeviceAsync(device, stoppingToken));
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}
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await Task.WhenAll(connectTasks);
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}
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/// <summary>
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/// 连接单个OPC UA设备。
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/// </summary>
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/// <param name="device">要连接的设备。</param>
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/// <param name="stoppingToken">取消令牌。</param>
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private async Task ConnectSingleOpcUaDeviceAsync(Device device, CancellationToken stoppingToken = default)
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{
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if (stoppingToken.IsCancellationRequested)
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{
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return;
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}
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// Check if already connected
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if (_sessionsDic.TryGetValue(device.OpcUaEndpointUrl, out var existingSession))
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{
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if (existingSession.Connected)
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{
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NlogHelper.Info($"已连接到 OPC UA 服务器: {device.OpcUaEndpointUrl}");
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continue;
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return;
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}
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else
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{
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// Remove disconnected session from dictionary to attempt reconnection
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_sessionsDic.TryRemove(device.OpcUaEndpointUrl, out _);
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}
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}
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NlogHelper.Info($"开始连接OPC UA服务器: {device.Name} ({device.OpcUaEndpointUrl})");
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try
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{
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var session = await ServiceHelper.CreateOpcUaSessionAsync(device.OpcUaEndpointUrl, stoppingToken);
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if (session == null)
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{
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NlogHelper.Warn($"创建OPC UA会话失败: {device.OpcUaEndpointUrl}");
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return; // 连接失败，直接返回
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}
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session = ServiceHelper.CreateOpcUaSession(device.OpcUaEndpointUrl);
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if (session == null)
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return; // 连接失败，直接返回
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_sessionsDic[device.OpcUaEndpointUrl] = session;
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_sessionsDic.AddOrUpdate(device.OpcUaEndpointUrl, session, (key, oldValue) => session);
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NotificationHelper.ShowSuccess($"已连接到OPC UA服务器: {device.Name} ({device.OpcUaEndpointUrl})");
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}
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catch (Exception e)
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{
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NotificationHelper.ShowError(
|
||||
$"OPC UA服务连接 {device.Name} ({device.OpcUaEndpointUrl}) 过程中发生错误：{e.Message}", e);
|
||||
}
|
||||
}
|
||||
|
||||
private void PollOpcUaVariable()
|
||||
private async Task PollOpcUaVariableOnceAsync(CancellationToken stoppingToken)
|
||||
{
|
||||
NlogHelper.Info("OpcUa轮询变量线程已启动，开始轮询变量....");
|
||||
while (!_stopdEvent.WaitOne(0))
|
||||
try
|
||||
{
|
||||
try
|
||||
{
|
||||
foreach (var deviceId in _pollVariableDic.Keys.ToList())
|
||||
{
|
||||
Thread.Sleep(100);
|
||||
if (!_deviceDic.TryGetValue(deviceId, out var device) || device.OpcUaEndpointUrl == null)
|
||||
{
|
||||
NlogHelper.Warn(
|
||||
$"OpcUa轮询变量时，在deviceDic中未找到ID为 {deviceId} 的设备，或其服务器地址为空，请检查！");
|
||||
continue;
|
||||
}
|
||||
// 获取当前需要轮询的设备ID列表的快照
|
||||
var deviceIdsToPoll = _pollVariableDic.Keys.ToList();
|
||||
|
||||
_sessionsDic.TryGetValue(device.OpcUaEndpointUrl, out Session session);
|
||||
if (session == null || !session.Connected)
|
||||
{
|
||||
if (!_stopdEvent.WaitOne(0))
|
||||
{
|
||||
NlogHelper.Warn(
|
||||
$"用于 {device.OpcUaEndpointUrl} 的 OPC UA 会话未连接。正在尝试重新连接...");
|
||||
// 尝试重新连接会话
|
||||
ConnectOpcUaService();
|
||||
continue;
|
||||
}
|
||||
}
|
||||
// 为每个设备创建并发轮询任务
|
||||
var pollingTasks = deviceIdsToPoll.Select(async deviceId =>
|
||||
{
|
||||
if (stoppingToken.IsCancellationRequested)
|
||||
{
|
||||
return; // 任务被取消，退出循环
|
||||
}
|
||||
|
||||
var nodesToRead = new ReadValueIdCollection();
|
||||
if (!_pollVariableDic.TryGetValue(deviceId, out var variableList))
|
||||
{
|
||||
continue;
|
||||
}
|
||||
if (!_deviceDic.TryGetValue(deviceId, out var device) ||
|
||||
device.OpcUaEndpointUrl == null)
|
||||
{
|
||||
NlogHelper.Warn(
|
||||
$"OpcUa轮询变量时，在deviceDic中未找到ID为 {deviceId} 的设备，或其服务器地址为空，请检查！");
|
||||
return; // 跳过此设备
|
||||
}
|
||||
|
||||
foreach (var variable in variableList)
|
||||
{
|
||||
// 获取变量的轮询间隔。
|
||||
if (!ServiceHelper.PollingIntervals.TryGetValue(variable.PollLevelType, out var interval))
|
||||
{
|
||||
NlogHelper.Info($"未知的轮询级别 {variable.PollLevelType}，跳过变量 {variable.Name}。");
|
||||
continue;
|
||||
}
|
||||
if (!device.IsActive)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
// 检查是否达到轮询时间。
|
||||
if ((DateTime.Now - variable.UpdateTime) < interval)
|
||||
continue; // 未到轮询时间，跳过。
|
||||
if (!_sessionsDic.TryGetValue(
|
||||
device.OpcUaEndpointUrl, out Session session) ||
|
||||
!session.Connected)
|
||||
{
|
||||
|
||||
if (device.IsActive)
|
||||
{
|
||||
// 尝试重新连接会话
|
||||
NlogHelper.Warn(
|
||||
$"用于 {device.OpcUaEndpointUrl} 的 OPC UA 会话未连接。正在尝试重新连接...");
|
||||
await ConnectSingleOpcUaDeviceAsync(
|
||||
device, stoppingToken);
|
||||
}
|
||||
|
||||
nodesToRead.Add(new ReadValueId
|
||||
{
|
||||
NodeId = new NodeId(variable.OpcUaNodeId),
|
||||
AttributeId = Attributes.Value
|
||||
});
|
||||
}
|
||||
return; // 跳过本次轮询
|
||||
}
|
||||
|
||||
// 如果没有要读取的变量则跳过
|
||||
if (nodesToRead.Count == 0)
|
||||
continue;
|
||||
var nodesToRead = new ReadValueIdCollection();
|
||||
if (!_pollVariableDic.TryGetValue(deviceId, out var variableList))
|
||||
{
|
||||
return; // 跳过此设备
|
||||
}
|
||||
|
||||
foreach (var variable in variableList)
|
||||
{
|
||||
if (stoppingToken.IsCancellationRequested)
|
||||
{
|
||||
return; // 任务被取消，退出循环
|
||||
}
|
||||
|
||||
session.Read(
|
||||
null,
|
||||
0,
|
||||
TimestampsToReturn.Both,
|
||||
nodesToRead,
|
||||
out DataValueCollection results,
|
||||
out DiagnosticInfoCollection diagnosticInfos);
|
||||
// 获取变量的轮询间隔。
|
||||
if (!ServiceHelper.PollingIntervals.TryGetValue(
|
||||
variable.PollLevelType, out var interval))
|
||||
{
|
||||
NlogHelper.Info(
|
||||
$"未知的轮询级别 {variable.PollLevelType}，跳过变量 {variable.Name}。");
|
||||
continue;
|
||||
}
|
||||
|
||||
if (results == null || results.Count == 0)
|
||||
continue;
|
||||
for (int i = 0; i < results.Count; i++)
|
||||
{
|
||||
var value = results[i];
|
||||
var nodeId = nodesToRead[i]
|
||||
.NodeId.ToString();
|
||||
if (!_opcUaNodeIdVariableDic.TryGetValue(nodeId, out var variable))
|
||||
{
|
||||
NlogHelper.Warn(
|
||||
$"在字典中未找到OpcUaNodeId为 {nodeId} 的变量对象！");
|
||||
continue;
|
||||
}
|
||||
// 检查是否达到轮询时间。
|
||||
if ((DateTime.Now - variable.UpdateTime) < interval)
|
||||
continue; // 未到轮询时间，跳过。
|
||||
|
||||
if (!StatusCode.IsGood(value.StatusCode))
|
||||
{
|
||||
NlogHelper.Warn(
|
||||
$"读取 OPC UA 变量 {variable.Name} ({variable.OpcUaNodeId}) 失败: {value.StatusCode}");
|
||||
continue;
|
||||
}
|
||||
nodesToRead.Add(new ReadValueId
|
||||
{
|
||||
NodeId = new NodeId(variable.OpcUaNodeId),
|
||||
AttributeId = Attributes.Value
|
||||
});
|
||||
}
|
||||
|
||||
// 如果没有要读取的变量则跳过
|
||||
if (nodesToRead.Count == 0)
|
||||
return; // 跳过此设备
|
||||
|
||||
// 更新变量数据
|
||||
variable.DataValue = value.Value.ToString();
|
||||
variable.DisplayValue = value.Value.ToString(); // 或者根据需要进行格式化
|
||||
variable.UpdateTime = DateTime.Now;
|
||||
NlogHelper.Info($"轮询变量：{variable.Name},值：{variable.DataValue}");
|
||||
// Console.WriteLine($"结果变量跟更新时间:{variable.UpdateTime}");
|
||||
// await _dataServices.UpdateVariableDataAsync(variable);
|
||||
}
|
||||
}
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
NotificationHelper.ShowError($"OPC UA 轮询期间发生错误: {ex.Message}", ex);
|
||||
}
|
||||
var readResponse = await session.ReadAsync(
|
||||
null,
|
||||
0,
|
||||
TimestampsToReturn.Both,
|
||||
nodesToRead,
|
||||
stoppingToken);
|
||||
|
||||
var results = readResponse.Results;
|
||||
var diagnosticInfos = readResponse.DiagnosticInfos;
|
||||
|
||||
if (results == null || results.Count == 0)
|
||||
return; // 没有读取到结果
|
||||
|
||||
for (int i = 0; i < results.Count; i++)
|
||||
{
|
||||
var value = results[i];
|
||||
var nodeId = nodesToRead[i]
|
||||
.NodeId.ToString();
|
||||
if (!_opcUaNodeIdVariableDic.TryGetValue(
|
||||
nodeId, out var variable))
|
||||
{
|
||||
NlogHelper.Warn(
|
||||
$"在字典中未找到OpcUaNodeId为 {nodeId} 的变量对象！");
|
||||
continue;
|
||||
}
|
||||
|
||||
if (!StatusCode.IsGood(value.StatusCode))
|
||||
{
|
||||
NlogHelper.Warn(
|
||||
$"读取 OPC UA 变量 {variable.Name} ({variable.OpcUaNodeId}) 失败: {value.StatusCode}");
|
||||
continue;
|
||||
}
|
||||
|
||||
// 更新变量数据并入队
|
||||
await UpdateAndEnqueueVariableData(variable, value.Value);
|
||||
}
|
||||
})
|
||||
.ToList();
|
||||
|
||||
// 等待所有设备的轮询任务完成
|
||||
await Task.WhenAll(pollingTasks);
|
||||
}
|
||||
catch (OperationCanceledException)
|
||||
{
|
||||
NlogHelper.Info("OPC UA 后台服务轮询变量被取消。");
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
NotificationHelper.ShowError($"OPC UA 后台服务在轮询变量过程中发生错误：{ex.Message}", ex);
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 更新变量数据，并将其推送到数据处理队列。
|
||||
/// </summary>
|
||||
/// <param name="variable">要更新的变量。</param>
|
||||
/// <param name="value">读取到的数据值。</param>
|
||||
private async Task UpdateAndEnqueueVariableData(VariableData variable, object value)
|
||||
{
|
||||
try
|
||||
{
|
||||
// 更新变量的原始数据值和显示值。
|
||||
variable.DataValue = value.ToString();
|
||||
variable.DisplayValue = value.ToString(); // 或者根据需要进行格式化
|
||||
variable.UpdateTime = DateTime.Now;
|
||||
NlogHelper.Info($"轮询变量：{variable.Name},值：{variable.DataValue}");
|
||||
// 将更新后的数据推入处理队列。
|
||||
await _dataProcessingService.EnqueueAsync(variable);
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
NlogHelper.Error($"更新变量 {variable.Name} 并入队失败:{ex.Message}", ex);
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 设置 OPC UA 订阅并添加监控项。
|
||||
/// </summary>
|
||||
/// <param name="stoppingToken">取消令牌。</param>
|
||||
private async Task SetupOpcUaSubscriptionAsync(CancellationToken stoppingToken)
|
||||
{
|
||||
if (stoppingToken.IsCancellationRequested)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
NlogHelper.Info("OpcUa轮询变量线程已停止。");
|
||||
var setupSubscriptionTasks = new List<Task>();
|
||||
|
||||
foreach (var deviceId in _subVariableDic.Keys.ToList())
|
||||
{
|
||||
setupSubscriptionTasks.Add(Task.Run(() =>
|
||||
{
|
||||
if (stoppingToken.IsCancellationRequested)
|
||||
{
|
||||
return; // 任务被取消，退出循环
|
||||
}
|
||||
|
||||
var device = _dataServices.Devices.FirstOrDefault(d => d.Id == deviceId);
|
||||
if (device == null)
|
||||
{
|
||||
NlogHelper.Warn($"未找到ID为 {deviceId} 的设备，无法设置订阅。");
|
||||
return;
|
||||
}
|
||||
|
||||
Subscription subscription = null;
|
||||
// 得到session
|
||||
if (!_sessionsDic.TryGetValue(device.OpcUaEndpointUrl, out var session))
|
||||
{
|
||||
NlogHelper.Info($"从OpcUa会话字典中获取会话失败： {device.OpcUaEndpointUrl} ");
|
||||
return;
|
||||
}
|
||||
|
||||
// 判断设备是否已经添加了订阅
|
||||
if (_subscriptionsDic.TryGetValue(device.OpcUaEndpointUrl, out subscription))
|
||||
{
|
||||
NlogHelper.Info($"OPC UA 终结点 {device.OpcUaEndpointUrl} 已存在订阅。");
|
||||
}
|
||||
else
|
||||
{
|
||||
subscription = new Subscription(session.DefaultSubscription);
|
||||
subscription.PublishingInterval = OpcUaSubscriptionPublishingIntervalMs; // 发布间隔（毫秒）
|
||||
session.AddSubscription(subscription);
|
||||
subscription.Create();
|
||||
_subscriptionsDic.AddOrUpdate(device.OpcUaEndpointUrl, subscription,
|
||||
(key, oldValue) => subscription);
|
||||
}
|
||||
|
||||
// 将变量添加到订阅
|
||||
if (_subVariableDic.TryGetValue(deviceId, out var variablesToSubscribe))
|
||||
{
|
||||
foreach (VariableData variable in variablesToSubscribe)
|
||||
{
|
||||
// 7. 创建监控项并添加到订阅中。
|
||||
MonitoredItem monitoredItem = new MonitoredItem(subscription.DefaultItem);
|
||||
monitoredItem.DisplayName = variable.Name;
|
||||
monitoredItem.StartNodeId = new NodeId(variable.OpcUaNodeId); // 设置要监控的节点 ID
|
||||
monitoredItem.AttributeId = Attributes.Value; // 监控节点的值属性
|
||||
monitoredItem.SamplingInterval = OpcUaSubscriptionSamplingIntervalMs; // 采样间隔（毫秒）
|
||||
monitoredItem.QueueSize = 1; // 队列大小
|
||||
monitoredItem.DiscardOldest = true; // 丢弃最旧的数据
|
||||
// 注册数据变化通知事件。
|
||||
monitoredItem.Notification += (sender, e) => OnSubNotification(variable,sender, e);
|
||||
|
||||
subscription.AddItem(monitoredItem);
|
||||
}
|
||||
|
||||
subscription.ApplyChanges(); // 应用更改
|
||||
NlogHelper.Info($"设备: {device.Name}, 添加了 {variablesToSubscribe.Count} 个订阅变量。");
|
||||
}
|
||||
}));
|
||||
}
|
||||
|
||||
await Task.WhenAll(setupSubscriptionTasks);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 订阅变量变化的通知
|
||||
/// </summary>
|
||||
/// <param name="variable">发生变化的变量。</param>
|
||||
/// <param name="monitoredItem"></param>
|
||||
/// <param name="e"></param>
|
||||
private void OnSubNotification(MonitoredItem monitoredItem, MonitoredItemNotificationEventArgs e)
|
||||
private async void OnSubNotification(VariableData variable, MonitoredItem monitoredItem,
|
||||
MonitoredItemNotificationEventArgs e)
|
||||
{
|
||||
|
||||
foreach (var value in monitoredItem.DequeueValues())
|
||||
{
|
||||
NlogHelper.Info(
|
||||
$"[OPC UA 通知] {monitoredItem.DisplayName}: {value.Value} | 时间戳: {value.SourceTimestamp.ToLocalTime()} | 状态: {value.StatusCode}");
|
||||
Console.WriteLine(
|
||||
$"[通知] {monitoredItem.DisplayName}: {value.Value} | 时间戳: {value.SourceTimestamp.ToLocalTime()} | 状态: {value.StatusCode}");
|
||||
$"[OPC UA 通知] {monitoredItem.DisplayName}: {value.Value} | 时间戳: {value.SourceTimestamp.ToLocalTime()} | 状态: {value.StatusCode}");
|
||||
if (StatusCode.IsGood(value.StatusCode))
|
||||
{
|
||||
await UpdateAndEnqueueVariableData(variable, value.Value);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/// <summary>
|
||||
/// 断开所有 OPC UA 会话。
|
||||
/// </summary>
|
||||
private void DisconnectAllOpcUaSessions()
|
||||
private async Task DisconnectAllOpcUaSessionsAsync()
|
||||
{
|
||||
if (_sessionsDic.IsEmpty)
|
||||
return;
|
||||
|
||||
NlogHelper.Info("正在断开所有 OPC UA 会话...");
|
||||
var closeTasks = new List<Task>();
|
||||
|
||||
foreach (var endpointUrl in _sessionsDic.Keys.ToList())
|
||||
{
|
||||
NlogHelper.Info($"正在断开 OPC UA 会话: {endpointUrl}");
|
||||
if (_sessionsDic.TryGetValue(endpointUrl, out var session))
|
||||
closeTasks.Add(Task.Run(async () =>
|
||||
{
|
||||
if (_subscriptionsDic.TryGetValue(endpointUrl, out var subscription))
|
||||
NlogHelper.Info($"正在断开 OPC UA 会话: {endpointUrl}");
|
||||
if (_sessionsDic.TryRemove(endpointUrl, out var session))
|
||||
{
|
||||
// 删除订阅。
|
||||
subscription.Delete(true);
|
||||
_subscriptionsDic.Remove(endpointUrl);
|
||||
if (_subscriptionsDic.TryRemove(endpointUrl, out var subscription))
|
||||
{
|
||||
// 删除订阅。
|
||||
await subscription.DeleteAsync(true);
|
||||
}
|
||||
|
||||
// 关闭会话。
|
||||
await session.CloseAsync();
|
||||
NotificationHelper.ShowInfo($"已从 OPC UA 服务器断开连接: {endpointUrl}");
|
||||
}
|
||||
|
||||
|
||||
// 关闭会话。
|
||||
session.Close();
|
||||
_sessionsDic.Remove(endpointUrl);
|
||||
NotificationHelper.ShowInfo($"已从 OPC UA 服务器断开连接: {endpointUrl}");
|
||||
}
|
||||
}));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/// <summary>
|
||||
/// 设置 OPC UA 订阅并添加监控项。
|
||||
/// </summary>
|
||||
/// <param name="session">OPC UA 会话。</param>
|
||||
/// <param name="variable">要订阅的变量信息。</param>
|
||||
/// <param name="endpointUrl">OPC UA 服务器的终结点 URL。</param>
|
||||
private void SetupOpcUaSubscription()
|
||||
{
|
||||
foreach (var deviceId in _subVariableDic.Keys)
|
||||
{
|
||||
var device = _dataServices.Devices.FirstOrDefault(d => d.Id == deviceId);
|
||||
Subscription subscription = null;
|
||||
// 得到session
|
||||
if (!_sessionsDic.TryGetValue(device.OpcUaEndpointUrl, out var session))
|
||||
{
|
||||
NlogHelper.Info($"从OpcUa会话字典中获取会话失败： {device.OpcUaEndpointUrl} ");
|
||||
continue;
|
||||
}
|
||||
|
||||
// 判断设备是否已经添加了订阅
|
||||
if (_subscriptionsDic.TryGetValue(device.OpcUaEndpointUrl, out subscription))
|
||||
{
|
||||
NlogHelper.Info($"OPC UA 终结点 {device.OpcUaEndpointUrl} 已存在订阅。");
|
||||
}
|
||||
else
|
||||
{
|
||||
subscription = new Subscription(session.DefaultSubscription);
|
||||
subscription.PublishingInterval = 1000; // 发布间隔（毫秒）
|
||||
session.AddSubscription(subscription);
|
||||
subscription.Create();
|
||||
_subscriptionsDic[device.OpcUaEndpointUrl] = subscription;
|
||||
}
|
||||
|
||||
// 将变量添加到订阅
|
||||
foreach (VariableData variable in _subVariableDic[deviceId])
|
||||
{
|
||||
// 7. 创建监控项并添加到订阅中。
|
||||
MonitoredItem monitoredItem = new MonitoredItem(subscription.DefaultItem);
|
||||
monitoredItem.DisplayName = variable.Name;
|
||||
monitoredItem.StartNodeId = new NodeId(variable.OpcUaNodeId); // 设置要监控的节点 ID
|
||||
monitoredItem.AttributeId = Attributes.Value; // 监控节点的值属性
|
||||
monitoredItem.SamplingInterval = 1000; // 采样间隔（毫秒）
|
||||
monitoredItem.QueueSize = 1; // 队列大小
|
||||
monitoredItem.DiscardOldest = true; // 丢弃最旧的数据
|
||||
// 注册数据变化通知事件。
|
||||
monitoredItem.Notification += OnSubNotification;
|
||||
|
||||
subscription.AddItem(monitoredItem);
|
||||
subscription.ApplyChanges(); // 应用更改
|
||||
}
|
||||
|
||||
NlogHelper.Info($"设备: {device.Name}, 添加了 {(_subVariableDic[deviceId]?.Count ?? 0)} 个订阅变量。");
|
||||
}
|
||||
await Task.WhenAll(closeTasks);
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user