Multiple Kafka Topics #10039

7 Answer(s)

• 

  0

  AI-Bot created yesterday

  Support Team ABP Agent

  To configure multiple Kafka topics in your ABP microservice, you should define each topic in your configuration and use the distributed event bus system to publish and subscribe to events for different topics. ABP's Kafka integration allows you to specify the topic name per event type using the event bus options.

  Here's how you can configure multiple Kafka topics:

  1. In your appsettings.json, define the Kafka connection and default topic:

  "Kafka": {
       "Connections": {
         "Default": {
           "BootstrapServers": "localhost:9092"
         }
       },
       "EventBus": {
         "GroupId": "my-group"
       }
     }
  

  2. In your module's ConfigureServices method, configure the distributed event bus to map specific event types to specific topics:

  Configure<AbpDistributedEventBusOptions>(options =>
     {
         options.Outboxes.ConfigureKafka(kafka =>
         {
             kafka.TopicSelector = eventType =>
             {
                 // Map event types to topics
                 if (eventType == typeof(MyFirstEvent))
                     return "first-topic";
                 if (eventType == typeof(MySecondEvent))
                     return "second-topic";
                 // Default topic
                 return "default-topic";
             };
         });
     });
  

  3. When you publish an event, ABP will use the topic specified by your selector function.

  This approach allows you to handle multiple Kafka topics in a single microservice, with each event type routed to its designated topic.

  Sources:

  • ABP Kafka Distributed Event Bus Integration

  ---

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  0

  AbdulmajeedS created yesterday

  I need advanced support of how configure Multiple Kafka Topics

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• 

  0

  maliming created yesterday

  Support Team Fullstack Developer

  hi

  What is your use case? EventBus?

  You can take look at this:https://abp.io/support/questions/3412/Kafka-subscribe-into-multiple-topics#answer-7b978c65-e340-67e9-dcd9-3a0508b832b4

  Thanks.

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  AbdulmajeedS created 16 hours ago

  Ok, I have Microservice need to publish events to topic and consume events from another topic, so I will have multiple topics in the service. so how can configure these topics ?

  KafkaDistributedEventBus

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  0

  maliming created 16 hours ago

  Support Team Fullstack Developer

  hi

  The KafkaDistributedEventBus only accepts one TopicName

  Both eventbus senders and receivers use the same name.

  have Microservice need to publish events to topic and consume events from another topic

  Why do you need this use case in EventBus?

  Thanks.

  

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  AbdulmajeedS created 12 hours ago

  I have use case that will publish event from topic 1 and consume event from external system and different topic so how can configure this case and have multiple topics

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  0

  maliming created 11 hours ago

  Support Team Fullstack Developer

  hi

  publish event from topic 1 and consume event from external system

  Is your external system based on the ABP framework?

  You can publish messages without using ABP's KafkaDistributedEventBus if the consumer is not an ABP application.

  Just use Kafka code to publish the message to a new topic.

  Thanks.

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