Realtime DB 추가 및 Historical DB추가

src/Infrastructure/OpcUa/ExperionHistoryService.cs

@@ -0,0 +1,63 @@
+using ExperionCrawler.Core.Application.Interfaces;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace ExperionCrawler.Infrastructure.OpcUa;
+
+/// <summary>
+/// 주기적으로 realtime_table 전체를 history_table 에 스냅샷 저장하는 BackgroundService.
+/// 간격은 appsettings.json: "HistoryIntervalSeconds" (기본 60초).
+/// </summary>
+public class ExperionHistoryService : BackgroundService
+{
+    private readonly IServiceScopeFactory _scopeFactory;
+    private readonly ILogger<ExperionHistoryService> _logger;
+    private readonly IExperionRealtimeService _realtimeService;
+    private readonly int _intervalSeconds;
+
+    public ExperionHistoryService(
+        IServiceScopeFactory scopeFactory,
+        ILogger<ExperionHistoryService> logger,
+        IExperionRealtimeService realtimeService,
+        IConfiguration config)
+    {
+        _scopeFactory    = scopeFactory;
+        _logger          = logger;
+        _realtimeService = realtimeService;
+        _intervalSeconds = config.GetValue<int>("HistoryIntervalSeconds", 60);
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        _logger.LogInformation("[HistoryService] 시작 — 간격: {Interval}초", _intervalSeconds);
+
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                await Task.Delay(TimeSpan.FromSeconds(_intervalSeconds), stoppingToken);
+
+                // 실시간 구독이 OFF 상태이면 스냅샷 건너뜀
+                if (!_realtimeService.GetStatus().Running)
+                {
+                    _logger.LogDebug("[HistoryService] 구독 중지 상태 — 스냅샷 건너뜀");
+                    continue;
+                }
+
+                using var scope = _scopeFactory.CreateScope();
+                var db = scope.ServiceProvider.GetRequiredService<IExperionDbService>();
+                var count = await db.SnapshotToHistoryAsync();
+                _logger.LogInformation("[HistoryService] 스냅샷 저장: {Count}건", count);
+            }
+            catch (OperationCanceledException) { break; }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "[HistoryService] 스냅샷 저장 실패");
+            }
+        }
+
+        _logger.LogInformation("[HistoryService] 종료");
+    }
+}