add supports for ZeroMQ, XRabbitMQ, XKafka ...

Providers/XKafkaProducerService.cs

@@ -13,21 +13,15 @@ using System;
 
 namespace xEventService.Providers
 {
-    public class XKafkaProducerService : IXKafkaProducerService
+    public class XKafkaProducerService : XBaseEventProducerService, IXKafkaProducerService
     {
         private readonly IProducer<Null, string> producer;
-        private readonly ILogger<XKafkaProducerService> logger;
-        private readonly XEventServiceConfiguration configuration;
 
         public XKafkaProducerService(
             ILogger<XKafkaProducerService> logger,
             XEventServiceConfiguration configuration
-        )
+        ) : base(configuration, logger)
         {
-            //
-            this.logger = logger;
-            this.configuration = configuration;
-
             //
             // Validate Configurations ...
             if (!configuration.IsValid() ||
@@ -132,7 +126,12 @@ namespace xEventService.Providers
         public void Dispose()
         {
             //
-            producer.Dispose();
+            if (producer != null)
+            {
+                producer.Dispose();
+            }
+
+            //
             GC.SuppressFinalize(this);
         }
     }