✨ Customizable gateway endpoints

DysonNetwork.Gateway/Configuration/GatewayEndpointsOptions.cs

@@ -0,0 +1,56 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace DysonNetwork.Gateway.Configuration;
+
+public class GatewayEndpointsOptions
+{
+    public const string SectionName = "Endpoints";
+
+    /// <summary>
+    /// List of all services that the gateway should manage.
+    /// If not specified, defaults to the built-in service list.
+    /// </summary>
+    public List<string>? ServiceNames { get; set; }
+
+    /// <summary>
+    /// List of core services that are essential for the application to function.
+    /// If not specified, defaults to the built-in core service list.
+    /// </summary>
+    public List<string>? CoreServiceNames { get; set; }
+
+    /// <summary>
+    /// Default service names used when no configuration is provided.
+    /// </summary>
+    public static readonly string[] DefaultServiceNames =
+    [
+        "ring",
+        "pass",
+        "drive",
+        "sphere",
+        "develop",
+        "insight",
+        "zone",
+        "messager"
+    ];
+
+    /// <summary>
+    /// Default core service names used when no configuration is provided.
+    /// </summary>
+    public static readonly string[] DefaultCoreServiceNames =
+    [
+        "ring",
+        "pass",
+        "drive",
+        "sphere"
+    ];
+
+    /// <summary>
+    /// Gets the effective service names, using configuration if available, otherwise defaults.
+    /// </summary>
+    public string[] GetServiceNames() => ServiceNames?.ToArray() ?? DefaultServiceNames;
+
+    /// <summary>
+    /// Gets the effective core service names, using configuration if available, otherwise defaults.
+    /// </summary>
+    public string[] GetCoreServiceNames() => CoreServiceNames?.ToArray() ?? DefaultCoreServiceNames;
+}

DysonNetwork.Gateway/Health/GatewayConstant.cs

@@ -2,7 +2,8 @@ namespace DysonNetwork.Gateway.Health;
 
 public abstract class GatewayConstant
 {
-    public static readonly string[] ServiceNames =
+    // Default service names used when no configuration is provided
+    private static readonly string[] DefaultServiceNames =
     [
         "ring",
         "pass",
@@ -14,12 +15,39 @@ public abstract class GatewayConstant
         "messager"
     ];
 
-    // Core services stands with w/o these services the functional of entire app will broke.
-    public static readonly string[] CoreServiceNames =
+    // Default core service names used when no configuration is provided
+    private static readonly string[] DefaultCoreServiceNames =
     [
         "ring",
         "pass",
         "drive",
         "sphere"
     ];
-}
+
+    // Configuration-driven service names with fallback to defaults
+    public static string[] ServiceNames { get; private set; } = DefaultServiceNames;
+
+    // Configuration-driven core service names with fallback to defaults
+    public static string[] CoreServiceNames { get; private set; } = DefaultCoreServiceNames;
+
+    /// <summary>
+    /// Initializes the service names from configuration options.
+    /// This method should be called during application startup.
+    /// </summary>
+    /// <param name="options">The gateway endpoints options containing configuration</param>
+    public static void InitializeFromConfiguration(DysonNetwork.Gateway.Configuration.GatewayEndpointsOptions options)
+    {
+        ServiceNames = options.GetServiceNames();
+        CoreServiceNames = options.GetCoreServiceNames();
+    }
+
+    /// <summary>
+    /// Resets the service names to their default values.
+    /// Useful for testing or when configuration is not available.
+    /// </summary>
+    public static void ResetToDefaults()
+    {
+        ServiceNames = DefaultServiceNames;
+        CoreServiceNames = DefaultCoreServiceNames;
+    }
+}

DysonNetwork.Gateway/Health/GatewayHealthAggregator.cs

@@ -57,4 +57,4 @@ public class GatewayHealthAggregator(IHttpClientFactory httpClientFactory, Gatew
             await Task.Delay(TimeSpan.FromSeconds(5), stoppingToken);
         }
     }
-}
+}

DysonNetwork.Gateway/Health/GatewayReadinessStore.cs

@@ -34,6 +34,42 @@ public class GatewayReadinessStore
         InitializeServices(GatewayConstant.ServiceNames);
     }
 
+    /// <summary>
+    /// Reinitializes the store with new service names from configuration.
+    /// This method should be called when configuration changes.
+    /// </summary>
+    /// <param name="serviceNames">The new service names to track</param>
+    public void ReinitializeServices(string[] serviceNames)
+    {
+        lock (_lock)
+        {
+            // Preserve existing health states for services that still exist
+            var existingStates = new Dictionary<string, ServiceHealthState>(_services);
+
+            _services.Clear();
+
+            foreach (var name in serviceNames)
+            {
+                // Use existing state if available, otherwise create new unhealthy state
+                if (existingStates.TryGetValue(name, out var existingState))
+                {
+                    _services[name] = existingState;
+                }
+                else
+                {
+                    _services[name] = new ServiceHealthState(
+                        name,
+                        IsHealthy: false,
+                        LastChecked: SystemClock.Instance.GetCurrentInstant(),
+                        Error: "Not checked yet"
+                    );
+                }
+            }
+
+            RecalculateLocked();
+        }
+    }
+
     private void InitializeServices(IEnumerable<string> serviceNames)
     {
         lock (_lock)

DysonNetwork.Gateway/Program.cs

@@ -1,10 +1,12 @@
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using System.Threading.RateLimiting;
+using DysonNetwork.Gateway.Configuration;
 using DysonNetwork.Gateway.Health;
 using DysonNetwork.Shared.Networking;
 using Yarp.ReverseProxy.Configuration;
 using Microsoft.AspNetCore.HttpOverrides;
+using Microsoft.Extensions.Options;
 using NodaTime;
 using NodaTime.Serialization.SystemTextJson;
 
@@ -17,6 +19,10 @@ builder.ConfigureAppKestrel(builder.Configuration, maxRequestBodySize: long.MaxV
 builder.Services.AddSingleton<GatewayReadinessStore>();
 builder.Services.AddHostedService<GatewayHealthAggregator>();
 
+// Add configuration options for gateway endpoints
+builder.Services.Configure<DysonNetwork.Gateway.Configuration.GatewayEndpointsOptions>(
+    builder.Configuration.GetSection(DysonNetwork.Gateway.Configuration.GatewayEndpointsOptions.SectionName));
+
 builder.Services.AddCors(options =>
 {
     options.AddDefaultPolicy(policy =>
@@ -170,6 +176,15 @@ builder.Services.AddControllers().AddJsonOptions(options =>
 
 var app = builder.Build();
 
+// Initialize GatewayConstant with configuration values
+var gatewayEndpointsOptions = app.Services
+    .GetRequiredService<IOptions<GatewayEndpointsOptions>>().Value;
+GatewayConstant.InitializeFromConfiguration(gatewayEndpointsOptions);
+
+// Reinitialize the readiness store with configured service names
+var readinessStore = app.Services.GetRequiredService<GatewayReadinessStore>();
+readinessStore.ReinitializeServices(GatewayConstant.ServiceNames);
+
 var forwardedHeadersOptions = new ForwardedHeadersOptions
 {
     ForwardedHeaders = ForwardedHeaders.All
@@ -186,4 +201,4 @@ app.MapReverseProxy().RequireRateLimiting("fixed");
 
 app.MapControllers();
 
-app.Run();
+app.Run();

DysonNetwork.Gateway/appsettings.json

@@ -12,5 +12,23 @@
     "SiteUrl": "http://localhost:3000",
     "Client": {
         "SomeSetting": "SomeValue"
+    },
+    "Endpoints": {
+        "ServiceNames": [
+            "ring",
+            "pass",
+            "drive",
+            "sphere",
+            "develop",
+            "insight",
+            "zone",
+            "messager"
+        ],
+        "CoreServiceNames": [
+            "ring",
+            "pass",
+            "drive",
+            "sphere"
+        ]
     }
-}
+}