Background Service erstellt

Watcher/Controllers/HomeController.cs

@@ -19,14 +19,14 @@ namespace Watcher.Controllers
         private readonly ILogger<HomeController> _logger;
 
         // Daten der Backgroundchecks abrufen
-        private INetworkCheckStore _NetworkCheckStore;
+        private IDashboardStore _DashboardStore;
 
         // HomeController Constructor
-        public HomeController(AppDbContext context, ILogger<HomeController> logger, INetworkCheckStore NetworkCheckStore)
+        public HomeController(AppDbContext context, ILogger<HomeController> logger, IDashboardStore dashboardStore)
         {
             _context = context;
             _logger = logger;
-            _NetworkCheckStore = NetworkCheckStore;
+            _DashboardStore = dashboardStore;
 
         }
 
@@ -41,7 +41,7 @@ namespace Watcher.Controllers
                 .Where(u => u.Username == preferredUserName)
                 .FirstOrDefaultAsync();
 
-            Console.WriteLine("Index" + _NetworkCheckStore.NetworkStatus);
+            Console.WriteLine("Index" + _DashboardStore.NetworkStatus);
             var viewModel = new DashboardViewModel
             {
                 ActiveServers = await _context.Servers.CountAsync(s => s.IsOnline),
@@ -59,7 +59,7 @@ namespace Watcher.Controllers
                 Containers = await _context.Containers
                     .OrderBy(s => s.Name)
                     .ToListAsync(),
-                NetworkStatus = _NetworkCheckStore.NetworkStatus
+                NetworkStatus = _DashboardStore.NetworkStatus
             };
             //ViewBag.NetworkConnection = _NetworkCheckStore.NetworkStatus;
             return View(viewModel);
@@ -74,7 +74,7 @@ namespace Watcher.Controllers
 
             var now = DateTime.UtcNow;
 
-            Console.WriteLine("DashboardStats" + _NetworkCheckStore.NetworkStatus);
+            Console.WriteLine("DashboardStats" + _DashboardStore.NetworkStatus);
 
             var model = new DashboardViewModel
             {
@@ -92,7 +92,7 @@ namespace Watcher.Controllers
                 Containers = await _context.Containers
                     .OrderBy(s => s.Name)
                     .ToListAsync(),
-                NetworkStatus = _NetworkCheckStore.NetworkStatus
+                NetworkStatus = _DashboardStore.NetworkStatus
             };
 
             return PartialView("_DashboardStats", model);

Watcher/Program.cs

@@ -35,10 +35,11 @@ builder.Services.AddControllersWithViews();
 builder.Services.AddHttpContextAccessor();
 
 // Storage Singleton
-builder.Services.AddSingleton<INetworkCheckStore, NetworkCheckStore>();
+builder.Services.AddSingleton<IDashboardStore, DashboardStore>();
 
 // Background Services
 builder.Services.AddHostedService<NetworkCheck>();
+builder.Services.AddHostedService<DatabaseCheck>();
 
 
 // ---------- Konfiguration ----------

Watcher/Services/DashboardStore.cs

@@ -0,0 +1,8 @@
+namespace Watcher.Services;
+
+public class DashboardStore : IDashboardStore
+{
+    public String? NetworkStatus { get; set; }
+
+    public String? DatabaseStatus { get; set; }
+}

Watcher/Services/DatabaseCheck.cs

@@ -0,0 +1,70 @@
+using Microsoft.Data.Sqlite;
+
+namespace Watcher.Services;
+
+public class DatabaseCheck : BackgroundService
+{
+    private readonly ILogger<DatabaseCheck> _logger;
+
+    private IDashboardStore _dashboardStore;
+
+    public DatabaseCheck(ILogger<DatabaseCheck> logger, IDashboardStore dashboardStore)
+    {
+        _logger = logger;
+        _dashboardStore = dashboardStore;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        var timer = new PeriodicTimer(TimeSpan.FromSeconds(30));
+
+        while (await timer.WaitForNextTickAsync(stoppingToken))
+        {
+            // Hintergrundprozess abwarten
+            // await checkDatabaseConnection();
+            await checkDatabaseIntegrity();
+            // 5 Sekdunden Offset
+            await Task.Delay(TimeSpan.FromSeconds(5), stoppingToken);
+        }
+    }
+
+    public Task checkDatabaseConnection()
+    {
+        return Task.CompletedTask;
+    }
+
+    public Task checkDatabaseIntegrity(String sqliteConnectionString)
+    {
+        using var conn = new SqliteConnection(sqliteConnectionString);
+        _logger.LogInformation("Sqlite Integrity-Check started...");
+
+        try
+        {
+            conn.Open();
+
+            using var command = conn.CreateCommand();
+            command.CommandText = """
+                SELECT integrity_check FROM pragma_integrity_check;
+                """;
+
+            using var reader = command.ExecuteReader();
+
+            while (reader.Read())
+            {
+                string status = reader.GetString(0);
+                _dashboardStore.DatabaseStatus = status;
+                _logger.LogInformation("Sqlite DatabaseIntegrity: ${status}", status);
+            }
+
+            conn.Close();
+        }
+        catch (SqliteException e)
+        {
+            conn.Close();
+            _logger.LogError(e.Message);
+        }
+
+        _logger.LogInformation("Database Integrity-Check finished.");
+        return Task.CompletedTask;
+    }
+}

Watcher/Services/IDashboardStore.cs

@@ -0,0 +1,7 @@
+namespace Watcher.Services;
+
+public interface IDashboardStore
+{
+    String? NetworkStatus { get; set; }
+    String? DatabaseStatus { get; set; }
+}

Watcher/Services/INetworkCheckStore.cs

@@ -1,6 +0,0 @@
-namespace Watcher.Services;
-
-public interface INetworkCheckStore
-{
-    String? NetworkStatus { get; set; }
-}

Watcher/Services/NetworkCheck.cs

@@ -1,4 +1,3 @@
-using System.Composition;
 using System.Net.NetworkInformation;
 
 namespace Watcher.Services;
@@ -6,12 +5,12 @@ public class NetworkCheck : BackgroundService
 {
     private readonly ILogger<NetworkCheck> _logger;
 
-    private INetworkCheckStore _NetworkCheckStore;
+    private IDashboardStore _DashboardStore;
 
-    public NetworkCheck(ILogger<NetworkCheck> logger, INetworkCheckStore NetworkCheckStore)
+    public NetworkCheck(ILogger<NetworkCheck> logger, IDashboardStore DashboardStore)
     {
         _logger = logger;
-        _NetworkCheckStore = NetworkCheckStore;
+        _DashboardStore = DashboardStore;
 
     }
 
@@ -41,13 +40,13 @@ public class NetworkCheck : BackgroundService
             PingReply reply = p.Send(host, 3000);
             if (reply.Status == IPStatus.Success)
             {
-                _NetworkCheckStore.NetworkStatus = "online";
+                _DashboardStore.NetworkStatus = "online";
                 _logger.LogInformation("Ping successfull. Watcher is online.");
             }
         }
         catch
         {
-            _NetworkCheckStore.NetworkStatus = "offline";
+            _DashboardStore.NetworkStatus = "offline";
             _logger.LogError("Ping failed. Watcher appears to have no network connection.");
         }
 

Watcher/Services/NetworkCheckStore.cs

@@ -1,6 +0,0 @@
-namespace Watcher.Services;
-
-public class NetworkCheckStore : INetworkCheckStore
-{
-    public String? NetworkStatus { get; set; }
-}