java - 检查系统是否连接到 Kafka

Question

我需要用Java编写一个冒烟测试来验证系统是否连接到kafka，

有人有什么主意吗？我找到了这篇文章：

如何检查 Kafka Server 是否正在运行？

但是从Java代码做起来太复杂了，我不认为这是我应该使用的方向。

提前致谢。

Answer 1

I had the same question and I don't want to leave this question without any answer. I read a lot about how I can check the connection and most of the answers I found was checking the connection with Zk, but I really want to check the connection directly with Kafka server.

What I did is to create a simple KafkaConsumer and list all the topics with listTopics(). If the connection is success, then you will get something as a return. Otherwise, you will get a TimeoutException.

  def validateKafkaConnection(kafkaParams : mutable.Map[String, Object]) : Unit = {
    val props = new Properties()
    props.put("bootstrap.servers", kafkaParams.get("bootstrap.servers").get.toString)
    props.put("group.id", kafkaParams.get("group.id").get.toString)
    props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer")
    props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer")
    val simpleConsumer = new KafkaConsumer[String, String](props)
    simpleConsumer.listTopics()
  }

then you can wrap this method in a try-catch sentence to catch the exception.

Answer 2

您可以使用以下命令检查服务器是否正在运行：

ZkClient zkClient = new ZkClient("your_zookeeper_server", 5000 /* ZOOKEEPER_SESSION_TIMEOUT */, 5000 /* ZOOKEEPER_CONNECTION_TIMEOUT */, ZKStringSerializer$.MODULE$);
List<Broker> brokers = scala.collection.JavaConversions.seqAsJavaList(zkUtils.getAllBrokersInCluster());
if (brokers.isEmpty()) {
    // No brokers available
} else {
    // There are brokers available
}