c++中kafka的使用方法是什么

在C++中使用Kafka可以通过librdkafka库实现。下面是一个简单的示例代码：

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


int main() {
    
    std::string brokers = "localhost:9092";
    
    std::string topic = "test";
    

    RdKafka::Conf *conf = RdKafka::Conf::create(RdKafka::Conf::CONF_GLOBAL);
    
    conf->
    set("metadata.broker.list", brokers, errstr);
    

    RdKafka::Producer *producer = RdKafka::Producer::create(conf, errstr);

    if (!producer) {
    
        std::cerr  "Failed to create producer: "  errstr  std::endl;
    
        return 1;

    }
    

    RdKafka::Topic *rd_topic = RdKafka::Topic::create(producer, topic, tconf, errstr);
    

    RdKafka::ErrorCode resp = producer->
    produce(rd_topic, RdKafka::Topic::PARTITION_UA, RdKafka::Producer::RK_MSG_COPY,
                                                const_castchar *>
    (message.c_str()), message.size(), NULL, NULL);


    if (resp != RdKafka::ERR_NO_ERROR) {
    
        std::cerr  "Failed to produce message: "  RdKafka::err2str(resp)  std::endl;

    }
    

    delete rd_topic;
    
    delete producer;
    

    return 0;

}
    

这段代码创建了一个生产者，将消息发送到指定的Kafka主题中。你可以根据需要修改代码来适配你的场景。同时，你可以通过librdkafka的文档来了解更多的API和功能。

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