2017-08-26 6 views

Antwort

0

Sie können listTopics() -Methode auch

ArrayList<Topics> topicList = new ArrayList<Topics>(); 
    Properties props = new Properties(); 
    Map<String, List<PartitionInfo>> topics; 
    Topics topic; 
    InputStream input = 
getClass().getClassLoader().getResourceAsStream("kafkaCluster.properties"); 
    try { 
     props.load(input); 
     props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, 
props.getProperty("BOOTSTRAP_SERVERS_CONFIG")); 
     props.put("key.deserializer", 
"org.apache.kafka.common.serialization.StringDeserializer"); 
     props.put("value.deserializer", 
"org.apache.kafka.common.serialization.StringDeserializer"); 
     KafkaConsumer<String, String> consumer = new KafkaConsumer<String, 
    String>(props); 
     topics = consumer.listTopics(); 
     // System.out.println(topics.get(topics)); 
     for (Map.Entry<String, List<PartitionInfo>> entry : 
    topics.entrySet()) { 
      System.out.println("Key = " + entry.getKey() + ", Value = " + 
    entry.getValue()); 
      topic = new Topics(); 
      topic.setTopic_name(entry.getKey()); 
      topic.setPartitions(Integer.toString(entry.getValue().size())); 
      topicList.add(topic); 
     } 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
+0

Hier ist die Anzahl der Elemente in Arrays ist die Anzahl der Partitionen. – Megha

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