Laravel中Kafka的使用详解

本文并没有kafka的安装教程,本文是针对已经安装kafka及其配置好kafka的php拓展并且使用laravel框架进行开发项目,配置一个可供laravel框架使用的生产及消费者类.

以下代码修改自本站的YII框架关于kafka类的代码,经过测试使用在本人的项目中,可正常运行,larvael版本:5.6 代码放置larvael框架位置:app/Tools/Kafka.php

<?phpnamespace App\\Tools;use Illuminate\\Config\\Repository;use Illuminate\\Support\\Facades\\DB;use Monolog\\Logger;use Monolog\\Handler\\StreamHandler;use Illuminate\\Http\\Request;class Kafka{public $broker_list = \'127.0.0.1\';//配置kafka，可以用逗号隔开多个kafkapublic $topic = \'test\';//管道名称public $partition = 0;protected $producer = null;protected $consumer = null;public function __construct(){if (empty($this->broker_list)) {throw new InvalidConfigException(\"broker not config\");}$rk = new \\RdKafka\\Producer();if (empty($rk)) {throw new InvalidConfigException(\"producer error\");}$rk->setLogLevel(LOG_DEBUG);if (!$rk->addBrokers($this->broker_list)) {throw new InvalidConfigException(\"producer error\");}$this->producer = $rk;}/*** 生产者* @param array $messages* @return mixed*/public function send($messages = [],$topic){$topic = $this->producer->newTopic($topic);return $topic->produce(RD_KAFKA_PARTITION_UA, $this->partition, json_encode($messages));}/*** 消费者*/public function consumer($object, $callback){$conf = new \\RdKafka\\Conf();$conf->set(\'group.id\', 0);$conf->set(\'metadata.broker.list\', $this->broker_list);$topicConf = new \\RdKafka\\TopicConf();$topicConf->set(\'auto.offset.reset\', \'smallest\');$conf->setDefaultTopicConf($topicConf);$consumer = new \\RdKafka\\KafkaConsumer($conf);$consumer->subscribe([$this->topic]);echo \"waiting for messages.....\\n\";while(true) {$message = $consumer->consume(120*1000);switch ($message->err) {case RD_KAFKA_RESP_ERR_NO_ERROR:echo \"message payload....\";$object->$callback($message->payload);break;}sleep(1);}}}?>

在控制器中如何使用:

首先再头部导入这个类:use App\\Tools\\Kafka;

下面是使用生产者实例:

public function test(){$topic = \'tool\';//输入使用管道名称$data[\'shop_id\'] = 58;$data[\'bar_code\']=586;$data[\'goods_num\'] = 1;$data[\'goods_unit\'] = \'个\';$Kafka = new Kafka();$Error_Msg = $Kafka->send($data,$topic);//传入数组会自动转换jsonvar_dump($Error_Msg);}

下面是消费者实例,消费者我这里使用了的是php脚本进行的操作:

<?php$conf = new RdKafka\\Conf();$conf->set(\'group.id\', \'myConsumerGroup\');$rk = new RdKafka\\Consumer($conf);$rk->addBrokers(\"localhost:9092\");$topicConf = new RdKafka\\TopicConf();$topicConf->set(\'auto.commit.interval.ms\', 100);$topicConf->set(\'offset.store.method\', \'file\');$topicConf->set(\'offset.store.path\', sys_get_temp_dir());$topicConf->set(\'auto.offset.reset\', \'smallest\');$topic = $rk->newTopic(\"tool\", $topicConf);//读取的管道// Start consuming partition 0$topic->consumeStart(0, RD_KAFKA_OFFSET_STORED);while (true) {$message = $topic->consume(0, 120*10000);switch ($message->err) {case RD_KAFKA_RESP_ERR_NO_ERROR://没有错误打印信息$message = json_decode(json_encode($message),true);$data = json_decode($message[\'payload\'],true);var_dump($data);break;case RD_KAFKA_RESP_ERR__PARTITION_EOF:echo \"等待接收信息\\n\";break;case RD_KAFKA_RESP_ERR__TIMED_OUT:echo \"超时\\n\";break;default:throw new \\Exception($message->errstr(), $message->err);break;}sleep(1);}?>

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