82 lines
3.2 KiB
C#
82 lines
3.2 KiB
C#
using Prism.Events;
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using System.Text.Json;
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using YY.Admin.Core;
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using YY.Admin.Core.Events;
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using YY.Admin.Core.Services;
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namespace YY.Admin.Services.Service.Vehicle;
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/// <summary>
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/// 监听 STOMP 收到的车辆变更信号，转发为桌面端 Prism 事件，触发列表刷新。
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/// </summary>
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public class VehicleSyncCoordinator : ISingletonDependency
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{
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private readonly IEventAggregator _eventAggregator;
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private readonly ILoggerService _logger;
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private SubscriptionToken? _remoteCommandToken;
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private SubscriptionToken? _networkStatusToken;
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public VehicleSyncCoordinator(IEventAggregator eventAggregator, ILoggerService logger)
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{
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_eventAggregator = eventAggregator;
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_logger = logger;
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_remoteCommandToken = _eventAggregator
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.GetEvent<RemoteCommandReceivedEvent>()
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.Subscribe(OnRemoteCommand, ThreadOption.BackgroundThread);
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// 断线重连后补拉一次，覆盖离线期间漏掉的 STOMP 事件
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_networkStatusToken = _eventAggregator
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.GetEvent<NetworkStatusChangedEvent>()
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.Subscribe(OnNetworkStatusChanged, ThreadOption.BackgroundThread);
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_logger.Information("[车辆推送] VehicleSyncCoordinator 已启动，开始监听 RemoteCommandReceivedEvent");
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}
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private void OnNetworkStatusChanged(NetworkStatusChangedPayload payload)
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{
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if (!payload.IsOnline) return;
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_logger.Information("[车辆推送] 网络恢复，触发补偿刷新");
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_eventAggregator.GetEvent<VehicleChangedEvent>().Publish(new VehicleChangedPayload { Action = "reconnect" });
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}
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private void OnRemoteCommand(RemoteCommandPayload payload)
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{
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try
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{
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var json = payload.CommandJson ?? string.Empty;
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if (string.IsNullOrWhiteSpace(json))
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{
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_logger.Information("[车辆推送] 收到空命令，忽略");
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return;
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}
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using var doc = JsonDocument.Parse(json);
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if (!doc.RootElement.TryGetProperty("cmd", out var cmdEl))
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{
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_logger.Information("[车辆推送] 命令无cmd字段，忽略");
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return;
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}
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var cmd = cmdEl.GetString() ?? string.Empty;
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if (!cmd.Equals("MES_VEHICLE_CHANGED", StringComparison.OrdinalIgnoreCase))
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{
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_logger.Information($"[车辆推送] 非车辆命令 cmd={cmd}，忽略");
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return;
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}
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doc.RootElement.TryGetProperty("action", out var actionEl);
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doc.RootElement.TryGetProperty("vehicleId", out var idEl);
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var changedPayload = new VehicleChangedPayload
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{
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Action = actionEl.GetString() ?? string.Empty,
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VehicleId = idEl.ValueKind == JsonValueKind.String ? idEl.GetString() : null,
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};
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_logger.Information($"收到车辆变更信号: action={changedPayload.Action}, vehicleId={changedPayload.VehicleId}");
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_eventAggregator.GetEvent<VehicleChangedEvent>().Publish(changedPayload);
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}
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catch (Exception ex)
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{
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_logger.Warning($"处理 STOMP 车辆变更信号失败: {ex.Message}");
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}
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}
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}
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