利用扩展的方式在PHP中使用Kafka的教程分享

public function kafkaTest()
{
	$rk = new \RdKafka\Producer();
	$rk->addBrokers("127.0.0.1:9092");
	$topic = $rk->newTopic("shop");
	$ret = [];
	for ($i = 0; $i < 5; $i++) {
		$content = "第" . $i . "次发送失败";
		$message = ["mobile" => "15623652142", "content" => $content];
		$payload = json_encode($message);
		// 指定向0号partition生产数据
		$ret[]['produce_res'] = $topic->produce(0, 0, $payload, "sms_$i");
		// 随机选择partition
		//$topic->produce(RD_KAFKA_PARTITION_UA, 0, $payload);
		if ($rk->getOutQLen() > 0) {
			$ret[]['produce_poll'] = $rk->poll(500);
		} else {
			$ret[]['produce_poll'] = $rk->poll(0);
		}
	}
	dump($ret);
}

protected function execute(Input $input, Output $output)
{
	$output->writeln("!!!hello kafka!!!");
	$conf = new \RdKafka\Conf();
	$conf->set('group.id', 'sms-consumer-group');
	$rk = new \RdKafka\Consumer($conf);
	$rk->addBrokers("127.0.0.1:9092");
	$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("shop", $topicConf);
	$topic->consumeStart(0, RD_KAFKA_OFFSET_STORED);
	while(true) {
		// 设置消费时的时间间隔，单位毫秒，以下表示5秒消费一个
		$message = $topic->consume(0, 5000);
		if ($message) {
			echo "读取到消息\n\r";
			// 消息对象，包括消息主题，消息创建时间戳，消息分区编号，消息主体，消息键名，消息长度等
			var_dump($message);
			switch ($message->err) {
				case RD_KAFKA_RESP_ERR_NO_ERROR:
					echo "读取消息成功:\n\r";
					var_dump($message->payload);
					break;
				case RD_KAFKA_RESP_ERR__PARTITION_EOF:
					echo "读取消息失败\n\r";
					break;
				case RD_KAFKA_RESP_ERR__TIMED_OUT:
					echo "请求超时\n\r";
					break;
				default:
					throw new \Exception($message->errstr(), $message->err);
					break;
			}
		} else {
			echo "未读取到消息\n\r";
		}
	}
	$output->writeln("!!!the end!!!");
}