配置的情况为:Release x64下的情况
完整项目:https://gitee.com/jiajingong/kafka-publisher
1、首先下载相应的库文件(.lib,.dll)
参考链接:
GitHub - eStreamSoftware/delphi-kafka
GitHub - cloader/KafkaCPP-win32-dll: KafkaCpp-win32-dll
2、新建一个新的下令行C++工程
建完工程后,选择Release x64,并在天生中执行重新天生解决方案,这样会在项目目次下天生x64/Release文件夹
3、通过VS2017配置附加库目次和附加依赖项
所有的.lib、.dll等库文件均在下图x64/Release目次下
附加依赖项到场:librdkafka.lib;librdkafkacpp.lib,如下图:
4、发布端:
将主函数的CPP文件改为:
- #include <iostream>
- #include <thread>
- #include "rdkafkacpp.h"
- int main()
- {
- std::string brokers = "172.18.4.96:9092";
- std::string errorStr;
- RdKafka::Conf *conf = RdKafka::Conf::create(RdKafka::Conf::CONF_GLOBAL);
- RdKafka::Conf *tconf = RdKafka::Conf::create(RdKafka::Conf::CONF_TOPIC);
- if (!conf) {
- std::cout << "Create RdKafka Conf failed" << std::endl;
- return -1;
- }
- conf->set("message.max.bytes", "10240000", errorStr); //最大字节数
- conf->set("replica.fetch.max.bytes", "20485760", errorStr);
- conf->set("bootstrap.servers", brokers, errorStr);
- RdKafka::Producer *producer = RdKafka::Producer::create(conf, errorStr);
- if (!producer) {
- std::cout << "Create Producer failed" << std::endl;
- return -1;
- }
- //创建Topic
- RdKafka::Topic *topic = RdKafka::Topic::create(producer, "koala-stqf-03", tconf, errorStr);
- if (!topic) {
- std::cout << "Create Topic failed" << std::endl;
- }
- int count = 0;
- while (true)
- { //发送消息
- RdKafka::ErrorCode resCode = producer->produce(topic, RdKafka::Topic::PARTITION_UA, RdKafka::Producer::RK_MSG_COPY, (char *)"123456789", 10, nullptr, nullptr);
- std::cout << "Count:" << count << ",has publish:" << (char *)"123456789" << std::endl;
- if (resCode != RdKafka::ERR_NO_ERROR) {
- std::cerr << "Produce failed: " << RdKafka::err2str(resCode) << std::endl;
- }
- count += 1;
- std::this_thread::sleep_for(std::chrono::seconds(1));
- }
- delete conf;
- delete tconf;
- delete topic;
- delete producer;
- RdKafka::wait_destroyed(5000);
- return 0;
- }
复制代码 5、订阅端
新建一个同样的订阅端工程,同样将主函数的代码改为:
- #include "rdkafkacpp.h"
- #include <chrono>
- #include <time.h>
- #include <sstream>
- #include <iomanip>
- #include <iostream>
- #include <algorithm>
- #include <iterator>
- void consume_cb(RdKafka::Message &message, void *opaque)
- {
- switch (message.err()) {
- case RdKafka::ERR__TIMED_OUT:
- std::cout << "RdKafka::ERR__TIMED_OUT" << std::endl;
- break;
- case RdKafka::ERR_NO_ERROR:
- /* Real message */
- RdKafka::MessageTimestamp ts;
- ts = message.timestamp();
- if (ts.type != RdKafka::MessageTimestamp::MSG_TIMESTAMP_NOT_AVAILABLE) {
- std::string timeprefix;
- if (ts.type == RdKafka::MessageTimestamp::MSG_TIMESTAMP_CREATE_TIME) {
- timeprefix = "created time";
- }
- else if (ts.type == RdKafka::MessageTimestamp::MSG_TIMESTAMP_LOG_APPEND_TIME) {
- timeprefix = "log append time";
- }
- unsigned long long milli = ts.timestamp + (unsigned long long)8 * 60 * 60 * 1000;//此处转化为东八区北京时间,如果是其它时区需要按需求修改
- auto mTime = std::chrono::milliseconds(milli);
- auto tp = std::chrono::time_point<std::chrono::system_clock, std::chrono::milliseconds>(mTime);
- auto tt = std::chrono::system_clock::to_time_t(tp);
- tm timeinfo;
- ::gmtime_s(&timeinfo, &tt);
- //char s[60]{ 0 };
- //::sprintf(s, "%04d-%02d-%02d %02d:%02d:%02d", timeinfo.tm_year + 1900, timeinfo.tm_mon + 1, timeinfo.tm_mday, timeinfo.tm_hour, timeinfo.tm_min, timeinfo.tm_sec);
- // std::cout << timeinfo.tm_year + 1900 << "-" << timeinfo.tm_mon + 1 << "-" << timeinfo.tm_mday << " " << timeinfo.tm_hour << ":" << timeinfo.tm_min << ":" << timeinfo.tm_sec << std::endl;
- #if 0
- std::stringstream ss;
- std::string dateStr;
- ss << timeinfo.tm_year + 1900 << "-"
- << timeinfo.tm_mon + 1 << "-"
- << timeinfo.tm_mday;
- ss >> dateStr;
- ss.clear();
- ss << timeinfo.tm_hour << ":"
- << timeinfo.tm_min << ":"
- << timeinfo.tm_sec;
- std::string timeStr;
- ss >> timeStr;
- std::string dateTimeStr;
- dateTimeStr += dateStr;
- dateTimeStr.push_back(' ');
- dateTimeStr += timeStr;
- #endif // 0
- //std::cout << "TimeStamp" << timeprefix << " " << s << std::endl;
- std::cout << "TimeStamp " << timeinfo.tm_year + 1900 << "-" << timeinfo.tm_mon + 1 << "-" << timeinfo.tm_mday << " " << timeinfo.tm_hour << ":" << timeinfo.tm_min << ":" << timeinfo.tm_sec << std::endl;
- }
- std::cout << message.topic_name() << " offset" << message.offset() << " partion " << message.partition() << " message: " << reinterpret_cast<char*>(message.payload()) << std::endl;
- break;
- case RdKafka::ERR__PARTITION_EOF:
- /* Last message */
- std::cout << "EOF reached for" << std::endl;
- break;
- case RdKafka::ERR__UNKNOWN_TOPIC:
- case RdKafka::ERR__UNKNOWN_PARTITION:
- std::cout << "Consume failed: " << message.errstr();
- break;
- default:
- /* Errors */
- std::cout << "Consume failed: " << message.errstr();
- break;
- }
- }
- int main()
- {
- std::string brokers = "172.18.4.96:9092";
- std::string errstr;
- std::vector<std::string> topics{ "koala-stqf-03",
- "klai-seim-alert-koala-test-03"
- };
- std::string group_id = "whl-consumer-group";
- RdKafka::Conf *conf = RdKafka::Conf::create(RdKafka::Conf::CONF_GLOBAL);
- if (conf->set("group.id", group_id, errstr)) {
- std::cout << errstr << std::endl;
- return -1;
- }
- conf->set("bootstrap.servers", brokers, errstr);
- conf->set("max.partition.fetch.bytes", "1024000", errstr);
- //conf->set("enable-auto-commit", "true", errstr);
- RdKafka::Conf *tconf = RdKafka::Conf::create(RdKafka::Conf::CONF_TOPIC);
- tconf->set("auto.offset.reset", "latest", errstr);
- conf->set("default_topic_conf", tconf, errstr);
- RdKafka::KafkaConsumer *m_consumer = RdKafka::KafkaConsumer::create(conf, errstr);
- if (!m_consumer) {
- std::cout << "failed to create consumer " << errstr << std::endl;
- return -1;
- }
- #if 0 //从上一次消费结束的位置开始消费
- RdKafka::ErrorCode err = m_consumer->subscribe(topics);
- if (err != RdKafka::ERR_NO_ERROR) {
- std::cout << RdKafka::err2str(err) << std::endl;
- return -1;
- }
- #else //指定每个topic的每个分区开始消费的位置
- //基本思路为先获取server端的状态信息,将与订阅相关的topic找出来,根据分区,创建TopicPartion;最后使用assign消费
- RdKafka::Metadata *metadataMap{ nullptr };
- RdKafka::ErrorCode err = m_consumer->metadata(true, nullptr, &metadataMap, 2000);
- if (err != RdKafka::ERR_NO_ERROR) {
- std::cout << RdKafka::err2str(err) << std::endl;
- }
- const RdKafka::Metadata::TopicMetadataVector *topicList = metadataMap->topics();
- std::cout << "broker topic size: " << topicList->size() << std::endl;
- RdKafka::Metadata::TopicMetadataVector subTopicMetaVec;
- std::copy_if(topicList->begin(), topicList->end(), std::back_inserter(subTopicMetaVec), [&topics](const RdKafka::TopicMetadata* data) {
- return std::find_if(topics.begin(), topics.end(), [data](const std::string &tname) {return data->topic() == tname; }) != topics.end();
- });
- std::vector<RdKafka::TopicPartition*> topicpartions;
- std::for_each(subTopicMetaVec.begin(), subTopicMetaVec.end(), [&topicpartions](const RdKafka::TopicMetadata* data) {
- auto parVec = data->partitions();
- std::for_each(parVec->begin(), parVec->end(), [&](const RdKafka::PartitionMetadata *value) {
- std::cout << data->topic() << " has partion: " << value->id() << " Leader is : " << value->leader() << std::endl;
- topicpartions.push_back(RdKafka::TopicPartition::create(data->topic(), value->id(), RdKafka::Topic::OFFSET_END));
- });
- });
- m_consumer->assign(topicpartions);
- #endif // 0
- RdKafka::ErrorCode errccc = m_consumer->subscribe(topics);
- if (errccc != RdKafka::ERR_NO_ERROR) {
- std::cout << RdKafka::err2str(errccc) << std::endl;
- return -1;
- }
- while (true)
- {
- RdKafka::Message *msg = m_consumer->consume(6000);
- consume_cb(*msg, nullptr); //消息一条消息
- delete msg;
- }
- return 0;
- }
复制代码
6、发布 订阅展示:
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