Initial Commit ...

2024-01-25 04:48:33 +03:30
commit 9eabf45f06
15 changed files with 1299 additions and 0 deletions
@@ -0,0 +1,140 @@
+using System;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using xCommons.Extensions;
+using xEventService.Configuration;
+using xEventService.Constants;
+using xEventService.Interfaces;
+using xEventService.Models;
+using xEventService.Providers;
+
+namespace xEventService.DI {
+    public static class XDIHelperExtension {
+        /// <summary>
+        /// Extract EventService Configurations ...
+        /// </summary>
+        /// <param name="source"></param>
+        /// <returns></returns>
+        public static XEventServiceConfiguration GetXEventServiceConfigurations (this IConfiguration source) {
+            //
+            var configSection = source
+                .GetSection (ConfigurationNodeNames.EVENT_SERVICE_NODE_NAME);
+            var result = configSection.Get<XEventServiceConfiguration> ();
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Register Event Service Configurations ...
+        /// </summary>
+        /// <param name="services"></param>
+        /// <param name="configuration"></param>
+        public static void AddXEventServiceConfigurations (
+            this IServiceCollection services,
+            IConfiguration configuration
+        ) {
+            //
+            var config = configuration.GetXEventServiceConfigurations ();
+            services.AddXEventServiceConfigurations (config);
+        }
+
+        /// <summary>
+        /// Register Event Service Configurations ...
+        /// </summary>
+        /// <param name="services"></param>
+        /// <param name="configuration"></param>
+        public static void AddXEventServiceConfigurations (
+            this IServiceCollection services,
+            XEventServiceConfiguration configuration
+        ) {
+            //
+            services.AddSingleton<XEventServiceConfiguration> (configuration);
+        }
+
+        /// <summary>
+        /// Register Event Service ...
+        /// </summary>
+        /// <param name="services"></param>
+        /// <param name="configuration"></param>
+        public static void AddXEventService (
+            this IServiceCollection services,
+            IConfiguration configuration
+        ) {
+            //
+            // Check Configuration Registered ...
+            var config = services.GetRegisteredService<XEventServiceConfiguration> ();
+            if (config.IsNull ()) {
+                //
+                Console.WriteLine ($"XEventService: there is no provided XEventServiceConfiguration, using default ...");
+
+                //
+                // Register Default Configuration ...
+                services.AddXEventServiceConfigurations (configuration);
+            }
+
+            //
+            // Register IXEventBus ...
+            var serviceBas = services.GetRegisteredService<IXEventBus> ();
+            if (serviceBas.IsNull ()) {
+                services.AddSingleton<IXEventBus, XEventBus> ();
+            }
+        }
+
+        /// <summary>
+        /// Register an Event Handler ...
+        /// </summary>
+        /// <param name="services"></param>
+        /// <param name="lifetime"></param>
+        /// <typeparam name="TEvent"></typeparam>
+        /// <typeparam name="THandler"></typeparam>
+        /// <returns></returns>
+        public static void AddXEventHandler<TEvent, THandler> (
+            this IServiceCollection services,
+            ServiceLifetime lifetime = ServiceLifetime.Transient
+        )
+        where TEvent : XEvent
+        where THandler : IXEventHandler<TEvent> {
+            //
+            services.Add (new ServiceDescriptor (
+                serviceType: typeof (THandler),
+                implementationType: typeof (THandler),
+                lifetime: lifetime
+            ));
+
+            //
+            services.Add (new ServiceDescriptor (
+                serviceType: typeof (IXEventHandler<TEvent>),
+                implementationType: typeof (THandler),
+                lifetime: lifetime
+            ));
+        }
+
+        /// <summary>
+        /// Subscribe to specific Event ...
+        /// </summary>
+        /// <param name="app"></param>
+        /// <typeparam name="TEvent"></typeparam>
+        /// <typeparam name="THandler"></typeparam>
+        /// <returns></returns>
+        public static void XEventSubscribe<TEvent, THandler> (
+            this IApplicationBuilder app,
+            bool toExchange = true
+        )
+        where TEvent : XEvent
+        where THandler : IXEventHandler<TEvent> {
+            //
+            var eventName = typeof (TEvent).Name;
+
+            //
+            // Retrieve EventBus from IOC ...
+            var eventBus = app.ApplicationServices.GetRequiredService<IXEventBus> ();
+
+            //
+            // Subscribe to Event Handler ...
+            var isSubscribed = eventBus.Subscribe<TEvent, THandler> ();
+            Console.WriteLine ($"XEventService: Event Handler subscription result: {eventName} => {isSubscribed} ...");
+        }
+    }
+}