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使用.net客户端连接到Kafka

这里推荐使用一个开源.net客户端：https://github.com/Jroland/kafka-net

Producer

var options = new KafkaOptions(new Uri("http://SERVER1:9092"), new Uri("http://SERVER2:9092"));
var router = new BrokerRouter(options);
var client = new Producer(router);

client.SendMessageAsync("TestHarness", new[] { new Message("hello world")}).Wait();

using (client) { }

Consumer

var options = new KafkaOptions(new Uri("http://SERVER1:9092"), new Uri("http://SERVER2:9092"));
var router = new BrokerRouter(options);
var consumer = new Consumer(new ConsumerOptions("TestHarness", router));

//Consume returns a blocking IEnumerable (ie: never ending stream)
foreach (var message in consumer.Consume())
{
    Console.WriteLine("Response: P{0},O{1} : {2}", 
        message.Meta.PartitionId, message.Meta.Offset, message.Value);  
}

完整测试代码

Producer生产者：

class Program
    {
        static void Main(string[] args)
        {
            do
            {
                Produce(GetKafkaBroker(), getTopicName());
                System.Threading.Thread.Sleep(3000);
            } while (true);
        }

        private static void Produce(string broker, string topic)
        {
            var options = new KafkaOptions(new Uri(broker));
            var router = new BrokerRouter(options);
            var client = new Producer(router);

            var currentDatetime =DateTime.Now;
            var key = currentDatetime.Second.ToString();
            var events = new[] { new Message("Hello World " + currentDatetime, key) };
            client.SendMessageAsync(topic, events).Wait(1500);
            Console.WriteLine("Produced: Key: {0}. Message: {1}", key, events[0].Value.ToUtf8String());

            using (client) { }
        }

        private static string GetKafkaBroker()
        {
            string KafkaBroker = string.Empty;
            const string kafkaBrokerKeyName = "KafkaBroker";

            if (!ConfigurationManager.AppSettings.AllKeys.Contains(kafkaBrokerKeyName))
            {
                KafkaBroker = "http://localhost:9092";
            }
            else
            {
                KafkaBroker = ConfigurationManager.AppSettings[kafkaBrokerKeyName];
            }
            return KafkaBroker;
        }
        private static string getTopicName()
        {
            string TopicName = string.Empty;
            const string topicNameKeyName = "Topic";

            if (!ConfigurationManager.AppSettings.AllKeys.Contains(topicNameKeyName))
            {
                throw new Exception("Key "" + topicNameKeyName + "" not found in Config file -> configuration/AppSettings");
            }
            else
            {
                TopicName = ConfigurationManager.AppSettings[topicNameKeyName];
            }
            return TopicName;
        }
    }

Consumer消费者：

class Program
    {
        static void Main(string[] args)
        {
            Consume(getKafkaBroker(), getTopicName());

        }

        private static void Consume(string broker, string topic)
        {   
            var options = new KafkaOptions(new Uri(broker));
            var router = new BrokerRouter(options);
            var consumer = new Consumer(new ConsumerOptions(topic, router));

            //Consume returns a blocking IEnumerable (ie: never ending stream)
            foreach (var message in consumer.Consume())
            {
                Console.WriteLine("Response: Partition {0},Offset {1} : {2}",
                    message.Meta.PartitionId, message.Meta.Offset, message.Value.ToUtf8String());
            }
        }

        private static string getKafkaBroker()
        {
            string KafkaBroker = string.Empty;
            var KafkaBrokerKeyName = "KafkaBroker";

            if (!ConfigurationManager.AppSettings.AllKeys.Contains(KafkaBrokerKeyName))
            {
                KafkaBroker = "http://localhost:9092";
            }
            else
            {
                KafkaBroker = ConfigurationManager.AppSettings[KafkaBrokerKeyName];
            }
            return KafkaBroker;
        }

        private static string getTopicName()
        {
            string TopicName = string.Empty;
            var TopicNameKeyName = "Topic";

            if (!ConfigurationManager.AppSettings.AllKeys.Contains(TopicNameKeyName))
            {
                throw new Exception("Key "" + TopicNameKeyName + "" not found in Config file -> configuration/AppSettings");
            }
            else
            {
                TopicName = ConfigurationManager.AppSettings[TopicNameKeyName];
            }
            return TopicName;
        }
    }

 

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