automated-testing-demo/producer/Producer.cs

using System;
using System.Text.Json;
using System.Threading.Tasks;
using Confluent.Kafka;
using Serializers;
using Model;

class Producer
{
    public static string TOPIC_NAME = "test-topic";
    public static async Task Main (string[] args)
    {
        var config = new ProducerConfig { BootstrapServers = "localhost:29092" };

        string introText = "\nType a string of text then press Enter. Type '+' anywhere in the text to quit:\n";
        var input = "";

        using (var producer = new ProducerBuilder<string, DataModel>(config)
            .SetValueSerializer(new JsonSerializer<DataModel>())
            .Build())
        {
            
            Console.WriteLine(introText);
            do
                {
                input = Console.ReadLine();
                try
                {
                    if (input != String.Empty)
                    {
                        SendMessage(producer, input);
                    }
                    
                }
                catch (OverflowException e)
                {
                    Console.WriteLine("An error has occurred", e.Message, input);
                    Console.WriteLine(introText);
                }
                } while (input != "+");
        }
    }

    private static async void SendMessage(IProducer<String, DataModel> producer, string str)
    {
        try
        {
            var msg = new Message<string, DataModel>
            {
                Key = System.Guid.NewGuid().ToString(),
                Value = new DataModel(System.Guid.NewGuid().ToString())
                {
                    message = str
                }
            };

            var dr = await producer.ProduceAsync(TOPIC_NAME, msg);
            Console.WriteLine($"Delivered message with id '{dr.Value.id}'");
        }
        catch (ProduceException<string, DataModel> e)
        {
            Console.WriteLine($"Delivery failed: {e.Error.Reason}");
        }
    }
}