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Kafka in core

Tuesday, 04 August 2020

Apache Kafka is a distributed streaming platform used for building real-time streaming data pipelines and applications. It is designed to handle high volumes of data and provide low-latency access to that data. Kafka is a distributed streaming platform that can be used for a variety of purposes.

 Some common use cases of Kafka include:

  1. Real-time Data Pipelines: Kafka can be used as a central data hub for ingesting and processing data from multiple sources. It can integrate with various data sources, including databases, file systems, and messaging systems, and provide real-time processing and analysis of the data.
  2. Message Queue: Kafka can be used as a message queue for decoupling the producers and consumers of data. It can provide reliable message delivery, message buffering, and message distribution across multiple consumers.
  3. Log Aggregation: Kafka can be used for collecting and processing logs from various sources. It can provide a scalable and fault-tolerant log aggregation system for storing, processing, and analyzing logs in real time.
  4. Event Sourcing: Kafka can be used as an event-sourcing system for building event-driven applications. It can store all the events related to an application in a distributed and fault-tolerant way, and provide a mechanism for replaying the events to rebuild the application state.
  5. Stream Processing: Kafka can be used for real-time stream processing of data. It can process and analyze data streams in real-time, and provide insights and alerts based on the analyzed data.


If you want to use Kafka in an ASP.NET Core application, you can use a Kafka client library such as Confluent.Kafka or KafkaNet. Here are some steps to get started. Install the Kafka client library using NuGet. For example, you can install Confluent.Kafka by running the following command in the Package Manager Console:


Install-Package Confluent.Kafka


Configure the Kafka client by creating a ProducerConfig or ConsumerConfig object. This object specifies the configuration settings for connecting to the Kafka cluster, such as the broker addresses, SSL settings, authentication credentials, etc. For example:


var config = new ConsumerConfig


    BootstrapServers = "localhost:9092",

    GroupId = "my-group",

    AutoOffsetReset = AutoOffsetReset.Earliest



Create a Kafka producer or consumer by creating a Producer or Consumer object and passing in the config object. For example:


var producer = new ProducerBuilder<Null, string>(config)

    .SetValueSerializer(new StringSerializer(Encoding.UTF8))



Use the producer to send messages to a Kafka topic or use the consumer to subscribe to a Kafka topic and receive messages. For example:


// Send a message to a topic

var message = new Message<Null, string> { Value = "Hello, Kafka!" };

var deliveryResult = await producer.ProduceAsync("my-topic", message);

// Consume messages from a topic

using (var consumer = new ConsumerBuilder<Ignore, string>(config).Build())



    while (true)


        var message = consumer.Consume();

        Console.WriteLine($"Received message: {message.Value}");




These are just some basic steps to get started with Kafka in an ASP.NET Core application. There are many more features and options available in Kafka and the client libraries that you can explore as you develop your application.

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