using CMS.Plugin.FlowManagement.Abstractions.FlowBusiness;
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using CMS.Plugin.HIAWms.Apis;
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using CMS.Plugin.HIAWms.Application.Contracts.Dtos.WmsPlaces;
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using CMS.Plugin.HIAWms.Domain.WmsPlaces;
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using CMS.Plugin.HIAWms.Jobs;
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using CMS.Project;
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using CMS.Project.Abstractions;
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using CMS.Unit.RuntimeValue.Abstractions;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Logging;
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using Volo.Abp.BackgroundJobs;
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using Volo.Abp.Uow;
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namespace CMS.Plugin.HIAWms.ProjectService
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{
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/// <summary>
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/// 工程服务，和工程关联的后台服务，当<see cref="IProjectServiceRunner"/>以当前Key调用时会被执行
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/// </summary>
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public class HIAWmsProjectService : BaseProjectService
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{
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private IServiceProvider _serviceProvider;
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private readonly ILogger<HIAWmsProjectService> _logger;
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private readonly IVariableDataCache _variableDataCache;
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private FlowVariableChannelListener _channelListener;
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private Dictionary<string, string> _monitorVariableNames;
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/// <summary>
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/// 服务的Key，唯一，供<see cref="IProjectServiceRunner"/>使用
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/// </summary>
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public override string Key => "HIAWms";
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/// <summary>
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/// 服务描述，显示在服务列表UI上的名称
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/// </summary>
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public override string Description => "HIAWms服务";
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/// <summary>
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/// 启用授权
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/// </summary>
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public override bool AuthRequired => true;
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/// <summary>
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/// Initializes a new instance of the <see cref="HIAWmsProjectService"/> class.
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/// </summary>
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/// <param name="logger">The logger.</param>
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/// <param name="variableDataCache">The variable data cache.</param>
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public HIAWmsProjectService(IServiceProvider serviceProvider, ILogger<HIAWmsProjectService> logger, IVariableDataCache variableDataCache)
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{
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_serviceProvider = serviceProvider;
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_logger = logger;
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_variableDataCache = variableDataCache;
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}
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/// <summary>
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/// 开启服务
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/// </summary>
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/// <param name="serviceProvider">具有工程上下文的实例</param>
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public override async Task StartAsync(IServiceProvider serviceProvider)
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{
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if (State == ProjectServiceState.Started)
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{
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return;
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}
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// 监听变量
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_monitorVariableNames = new Dictionary<string, string>
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{
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{ "HIAWms_Variable1", "监听变量1" },
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{ "HIAWms_Variable2", "监听变量2" }
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};
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// 创建通道监听
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_channelListener?.Token?.Dispose();
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_channelListener = new FlowVariableChannelListener(_logger, _variableDataCache);
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_channelListener.CreateChannel(Key, waitListener: false, timeout: TimeSpan.FromSeconds(30), variableFilter: _monitorVariableNames.Keys.ToHashSet());
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_channelListener.TagChanged += OnTagValueChanged;
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await base.StartAsync(serviceProvider);
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}
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/// <summary>
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/// 停止服务
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/// </summary>
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/// <param name="serviceProvider">具有工程上下文的实例</param>
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public override async Task StopAsync(IServiceProvider serviceProvider)
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{
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if (_channelListener != null)
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{
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// 释放监听
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_channelListener.TagChanged -= OnTagValueChanged;
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_channelListener.Token.Dispose();
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_channelListener = null;
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}
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// 使用后台作业异步处理
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//await _serviceProvider.GetRequiredService<IBackgroundJobManager>().EnqueueAsync(new HIAWmsArgs
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//{
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// Subject = "HIAWms_Subject",
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// Body = "HIAWms_Body",
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//});
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await base.StopAsync(serviceProvider);
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}
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/// <summary>
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/// Called when [tag value changed].
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/// </summary>
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/// <param name="sender">The sender.</param>
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/// <param name="e">The <see cref="TagChangedEventArgs"/> instance containing the event data.</param>
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private async void OnTagValueChanged(object sender, TagChangedEventArgs e)
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{
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var changeds = e.Changeds.Where(x => _monitorVariableNames != null && _monitorVariableNames.ContainsKey(x.Name));
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if (!changeds.Any())
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{
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return;
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}
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foreach (var changed in changeds)
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{
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var oldValue = changed.Old?.Value;
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var newValue = changed.New?.Value;
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var traceId = e.TraceId;
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_logger.LogInformation($"{changed.Name} 变量值发生变化，旧值{oldValue}=新值{newValue}，TraceId={traceId}");
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// TODO: 处理变量值变化
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// Tips：https://cms-docs.shengyc.com/cms/api/%E5%90%8E%E7%AB%AF#3-%E5%8F%98%E9%87%8F%E6%A8%A1%E5%9D%97
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/* 说明：通过订阅 IVariableDataCache.TagChanged 事件，您可以实时监控变量的变化。此事件会传递所有变量至事件处理函数，因此，业务层需在函数中筛选关注的变量。
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注意事项：
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（1）性能影响： 发布事件时，事件的发送者将阻塞流程。因此，强烈建议避免在事件处理函数中执行 I/ O 操作、HTTP 接口访问或其他耗时操作，以防止对系统性能产生严重影响，导致整个系统响应延迟。
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（2）高频率触发： 由于事件订阅了全量变量，触发频率可能非常高。
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（3）异步处理： 鉴于事件触发频率很高，建议业务层在筛选关注变量后，使用 Task 启动新线程处理业务逻辑，以避免阻塞核心的变量监听功能，实现业务层与平台基座的解耦。
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（4）并发管理： 如果业务层并发量大，必须优化代码设计和实施，以减少在高并发情况下的系统资源消耗，防止系统性能问题。
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（5）代码安全： 安装并使用 CMS.CodeAnalysis 分析器来分析 IVariableDataCache.TagChanged 的使用情况。该工具能在使用不当时提供编译错误，帮助您提高代码质量。*/
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_ = Task.Run(async () =>
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{
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// 例1：同步处理
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//await ProcessAsync();
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// 例2：调用外部API
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//await ExecuteExternalApiAsync();
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});
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}
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}
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/// <summary>
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/// Processes the asynchronous.
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/// </summary>
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private async Task ProcessAsync()
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{
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using var scope = _serviceProvider.CreateScope();
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var unitOfWorkManager = scope.ServiceProvider.GetRequiredService<IUnitOfWorkManager>();
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using var uow = unitOfWorkManager.Begin(requiresNew: true);
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var wmsplaceRepository = scope.ServiceProvider.GetRequiredService<IWmsPlaceRepository>();
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var count = await wmsplaceRepository.GetCountAsync();
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// 如果有更新数据库操作，需提交保存
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// await uow.SaveChangesAsync();
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_logger.LogInformation($"ProcessAsync，Count={count}");
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}
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/// <summary>
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/// Executes the external API.
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/// </summary>
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private async Task ExecuteExternalApiAsync()
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{
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}
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}
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}
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