working version

src/BuildingBlocks/EventBus/EventBus/Utils.cs

@@ -0,0 +1,15 @@
+using System.Linq;
+using System.Text;
+
+namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBus;
+
+public static class Utils
+{
+    public static string CalculateMd5Hash(string input)
+    {
+        using var md5 = System.Security.Cryptography.MD5.Create();
+        var inputBytes = Encoding.ASCII.GetBytes(input);
+        var hashBytes = md5.ComputeHash(inputBytes);
+        return Convert.ToHexString(hashBytes);
+    }
+}

src/BuildingBlocks/EventBus/EventBusKafka/EventBusKafka.cs

@@ -34,6 +34,9 @@ public class EventBusKafka : IEventBus, IDisposable
         var message = new Message<string, string> { Key = eventName, Value = jsonMessage };
         var kafkaHandle = 
             new DependentProducerBuilder<string, string>(_persistentConnection.Handle).Build();
+        
+        Console.WriteLine($"Publishing event: {eventName}\n Content: {Utils.CalculateMd5Hash(jsonMessage)}");
+        
         kafkaHandle.ProduceAsync(TopicName, message);
     }
 

src/BuildingBlocks/EventBus/EventBusKafka/KafkaConsumerBackgroundService.cs

@@ -1,3 +1,4 @@
+using System.Security.Cryptography;
 using Autofac;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Hosting;
@@ -14,16 +15,15 @@ public class KafkaConsumerBackgroundService : BackgroundService
     private const string AutofacScopeName = "eshop_event_bus";
     private const string TopicName = "eshop_event_bus";
 
-    
-    public KafkaConsumerBackgroundService(IConfiguration config, 
+    public KafkaConsumerBackgroundService(IConfiguration configuration, 
         IEventBusSubscriptionsManager subsManager, 
         ILifetimeScope autofac,
         ILogger<KafkaConsumerBackgroundService> logger) 
     {
         var consumerConfig = new ConsumerConfig();
-        config.GetSection("Kafka:ConsumerSettings").Bind(consumerConfig);
-        
+        configuration.GetSection("Kafka:ConsumerSettings").Bind(consumerConfig);
         _kafkaConsumer = new ConsumerBuilder<string, string>(consumerConfig).Build();
+        
         _subsManager = subsManager;
         _autofac = autofac;
         _logger = logger;
@@ -45,7 +45,10 @@ public class KafkaConsumerBackgroundService : BackgroundService
                 var consumeResult = _kafkaConsumer.Consume(cancellationToken);
 
                 var eventName = consumeResult.Message.Key;
+                var messageContent = consumeResult.Message.Value;
                 
+                Console.WriteLine($"Consumed event: {eventName}\n Content: {Utils.CalculateMd5Hash(messageContent)}");
+
                 if (!_subsManager.HasSubscriptionsForEvent(eventName))
                 {
                     _logger.LogWarning("No subscription for Kafka event: {EventName}", eventName);
@@ -71,7 +74,7 @@ public class KafkaConsumerBackgroundService : BackgroundService
                     var handler = scope.ResolveOptional(subscription.HandlerType);
                     if (handler == null) continue;
                     var eventType = _subsManager.GetEventTypeByName(eventName);
-                    var integrationEvent = JsonSerializer.Deserialize(consumeResult.Message.Value, 
+                    var integrationEvent = JsonSerializer.Deserialize(messageContent, 
                         eventType, 
                         new JsonSerializerOptions
                         {

src/Services/Basket/Basket.API/appsettings.Development.json

@@ -14,12 +14,13 @@
   "ConnectionString": "127.0.0.1",
   "AzureServiceBusEnabled": false,
   "EventBusConnection": "localhost",
+  "KafkaEnabled": true,
   "Kafka": {
     "ProducerSettings": {
-      "BootstrapServers": "localhost:9092"
+      "BootstrapServers": "broker:9092"
     },
     "ConsumerSettings": {
-      "BootstrapServers": "localhost:9092",
+      "BootstrapServers": "broker:9092",
       "GroupId": "basket-group-id"
     }
   }

src/Services/Basket/Basket.API/appsettings.json

@@ -26,5 +26,15 @@
     "Name": "eshop",
     "ClientId": "your-client-id",
     "ClientSecret": "your-client-secret"
+  },
+  "KafkaEnabled": true,
+  "Kafka": {
+    "ProducerSettings": {
+      "BootstrapServers": "broker:9092"
+    },
+    "ConsumerSettings": {
+      "BootstrapServers": "broker:9092",
+      "GroupId": "basket-group-id"
+    }
   }
 }

src/docker-compose.override.yml

@@ -33,6 +33,7 @@ services:
       - "6379:6379"
     volumes:
       - eshop-basketdata:/data
+    
   rabbitmq:
     ports:
       - "15672:15672"
@@ -47,8 +48,8 @@ services:
     environment:
       KAFKA_BROKER_ID: 1
       KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181'
-      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_INTERNAL:PLAINTEXT
-      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092,PLAINTEXT_INTERNAL://broker:29092
+      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
+      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:9092,PLAINTEXT_HOST://localhost:29092
       KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
       KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
       KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1