我有一個卡夫卡經紀人與多個主題,每個擁有一個單一的分區。卡夫卡消費者與JAVA
我有消費者認爲只是正常從主題
我的問題是我需要通過增加分區的數量,以提高通過消息隊列的放消耗的消息,說我有一個四個分區主題,有沒有辦法,我可以寫四個消費者,每個指向個人分區的主題?
import java.util.*;
import kafka.consumer.Consumer;
import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;
public class KafkaConsumer {
private ConsumerConnector consumerConnector = null;
private final String topic = "mytopic";
public void initialize() {
Properties props = new Properties();
props.put("zookeeper.connect", "localhost:2181");
props.put("group.id", "testgroup");
props.put("zookeeper.session.timeout.ms", "400");
props.put("zookeeper.sync.time.ms", "300");
props.put("auto.commit.interval.ms", "1000");
ConsumerConfig conConfig = new ConsumerConfig(props);
consumerConnector = Consumer.createJavaConsumerConnector(conConfig);
}
public void consume() {
//Key = topic name, Value = No. of threads for topic
Map<String, Integer> topicCount = new HashMap<String, Integer>();
topicCount.put(topic, new Integer(1));
//ConsumerConnector creates the message stream for each topic
Map<String, List<KafkaStream<byte[], byte[]>>> consumerStreams =
consumerConnector.createMessageStreams(topicCount);
// Get Kafka stream for topic 'mytopic'
List<KafkaStream<byte[], byte[]>> kStreamList =
consumerStreams.get(topic);
// Iterate stream using ConsumerIterator
for (final KafkaStream<byte[], byte[]> kStreams : kStreamList) {
ConsumerIterator<byte[], byte[]> consumerIte = kStreams.iterator();
while (consumerIte.hasNext())
System.out.println("Message consumed from topic
[" + topic + "] : " +
new String(consumerIte.next().message()));
}
//Shutdown the consumer connector
if (consumerConnector != null) consumerConnector.shutdown();
}
public static void main(String[] args) throws InterruptedException {
KafkaConsumer kafkaConsumer = new KafkaConsumer();
// Configure Kafka consumer
kafkaConsumer.initialize();
// Start consumption
kafkaConsumer.consume();
}
}