Add EverythingServer sample (#151)

samples/EverythingServer/LoggingUpdateMessageSender.cs

@@ -0,0 +1,43 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using ModelContextProtocol;
+using ModelContextProtocol.Protocol.Types;
+using ModelContextProtocol.Server;
+
+namespace EverythingServer;
+
+public class LoggingUpdateMessageSender(IMcpServer server, Func<LoggingLevel> getMinLevel) : BackgroundService
+{
+    readonly Dictionary<LoggingLevel, string> _loggingLevelMap = new()
+    {
+        { LoggingLevel.Debug, "Debug-level message" },
+        { LoggingLevel.Info, "Info-level message" },
+        { LoggingLevel.Notice, "Notice-level message" },
+        { LoggingLevel.Warning, "Warning-level message" },
+        { LoggingLevel.Error, "Error-level message" },
+        { LoggingLevel.Critical, "Critical-level message" },
+        { LoggingLevel.Alert, "Alert-level message" },
+        { LoggingLevel.Emergency, "Emergency-level message" }
+    };
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            var newLevel = (LoggingLevel)Random.Shared.Next(_loggingLevelMap.Count);
+
+            var message = new
+                {
+                    Level = newLevel.ToString().ToLower(),
+                    Data = _loggingLevelMap[newLevel],
+                };
+
+            if (newLevel > getMinLevel())
+            {
+                await server.SendNotificationAsync("notifications/message", message, cancellationToken: stoppingToken);
+            }
+
+            await Task.Delay(15000, stoppingToken);
+        }
+    }
+}