kafka与dotnet的集成

Question

我正在尝试将kafka与dot net 4.5集成。API在dotnet4.5中使用的kafka主题如何？需要在API下消费kafka主题的解决方案，并通过Web服务传递前端。

Answer 1

步骤1：设置Kafka

在您的服务器或云环境中安装并设置Kafka。确保您有一个Kafka代理在运行，并且您已经创建了生成和使用消息所需的主题。步骤2：创建一个.NET 4.5 Web API项目

打开Visual Studio并创建一个新的针对.NET Framework 4.5的ASP.NET Web应用程序。

选择"；Web API"；样板

步骤3：安装Confluent.Kafka包

在解决方案资源管理器中右键单击您的项目，然后选择"；管理NuGet包">

搜索"；Confluent.Kafka"；并安装软件包。

步骤4：配置Kafka消费者

using System;
using Confluent.Kafka;
public class KafkaConsumer
{
private readonly string _bootstrapServers;
private readonly string _topic;
private IConsumer<Ignore, string> _consumer;
public KafkaConsumer(string bootstrapServers, string topic)
{
_bootstrapServers = bootstrapServers;
_topic = topic;
}
public void StartConsuming()
{
var config = new ConsumerConfig
{
BootstrapServers = _bootstrapServers,
GroupId = "my-group", // Change this to your consumer group ID
AutoOffsetReset = AutoOffsetReset.Earliest
};
_consumer = new ConsumerBuilder<Ignore, string>(config).Build();
_consumer.Subscribe(_topic);
while (true)
{
try
{
var consumeResult = _consumer.Consume();
var message = consumeResult.Message.Value;

// Process the message (e.g., store it in a database, send it to the frontend through a webservice, etc.)
// Implement your custom logic here.
_consumer.Commit(consumeResult);
}
catch (ConsumeException e)
{
// Handle any exceptions that occur during consumption.
Console.WriteLine($"Error while consuming message: {e.Error.Reason}");
}
}
}
public void StopConsuming()
{
_consumer?.Close();
}

步骤5：从API 启动Kafka Consumer

在API的启动代码(例如Global.asax或startup.cs(中，在应用程序启动时启动Kafka使用者。csharp

public class WebApiApplication : System.Web.HttpApplication

{私有静态KafkaConsumer_KafkaConsumer；

protected void Application_Start()
{
// Other startup configurations
// Start Kafka consumer
var bootstrapServers = "YOUR_KAFKA_BROKER_HOST:PORT";
var topic = "YOUR_KAFKA_TOPIC";
_kafkaConsumer = new KafkaConsumer(bootstrapServers, topic);
Task.Run(() => _kafkaConsumer.StartConsuming());
}
protected void Application_Stop()
{
// Stop Kafka consumer when the application stops
_kafkaConsumer?.StopConsuming();
}

步骤6：通过Web API端点公开数据

创建Web API端点，将您从Kafka处理的数据提供给前端。Y

public class DataController : ApiController
{
[HttpGet]
[Route("api/data")]
public IHttpActionResult Get()
{
// Return the data you want to expose to the frontend
// This could be data stored in a database or any other processed data from Kafka.
return Ok("Your data goes here");
}
}