kafka c++ 接入实例

以下是使用C++接入Kafka的一个简单示例：

#include <iostream>
#include <librdkafka/rdkafkacpp.h>

int main() {
    std::string brokers = "localhost:9092"; // Kafka brokers地址
    std::string topic_name = "test_topic"; // Kafka主题名

    // 创建Kafka生产者配置对象
    RdKafka::Conf *conf = RdKafka::Conf::create(RdKafka::Conf::CONF_GLOBAL);
    std::string errstr;

    // 设置broker地址
    if (conf->set("bootstrap.servers", brokers, errstr) != RdKafka::Conf::CONF_OK) {
        std::cerr << "Failed to set broker address: " << errstr << std::endl;
        return 1;
    }

    // 创建Kafka生产者对象
    RdKafka::Producer *producer = RdKafka::Producer::create(conf, errstr);
    if (!producer) {
        std::cerr << "Failed to create producer: " << errstr << std::endl;
        return 1;
    }

    // 创建Kafka消息对象
    RdKafka::Topic *topic = RdKafka::Topic::create(producer, topic_name, NULL, errstr);
    if (!topic) {
        std::cerr << "Failed to create topic: " << errstr << std::endl;
        return 1;
    }

    // 发送消息
    std::string message = "Hello, Kafka!";
    RdKafka::ErrorCode resp = producer->produce(topic, RdKafka::Topic::PARTITION_UA, RdKafka::Producer::RK_MSG_COPY, const_cast<char *>(message.c_str()), message.size(), NULL, NULL);
    if (resp != RdKafka::ERR_NO_ERROR) {
        std::cerr << "Failed to produce message: " << RdKafka::err2str(resp) << std::endl;
        return 1;
    }

    // 关闭资源
    delete topic;
    delete producer;
    delete conf;

    return 0;
}

注意：该示例仅用于演示C++接入Kafka的基本流程，实际应用中需要根据实际情况进行配置和细节处理。