Kafka Scala Producer API

Kafka Sca
4000
la Producer API

构造Producer

kafka.javaapi.producer.Producer<K, V>

Properties props = new Properties();

props.put("metadata.broker.list", "broker1:9092,broker2:9092");//该配置项必须有，producer通过连接这些broker找到partition的leader，只要是集群中的broker就行，不一定要leader的
props.put("serializer.class", "kafka.serializer.StringEncoder");//序列化，这个类的输入决定了KeyedMessage<K,V>中V的类型，默认为kafka.serializer.DefaultEncoder，即直接传输byte[]
props.put("partitioner.class", "example.producer.myPartitioner");//分区规则，也有默认的，可以自定义
props.put("request.required.acks", "1");//发送消息成功后需要等待kafka的回应

ProducerConfig config = new ProducerConfig(props);

Producer<String, String> producer = new Producer<String, String>(config);

构造消息

kafka.producer.KeyedMessage<K,V>

KeyedMessage<String, String> data = new KeyedMessage<K, V>(String topic, K key, V message);

//若无kay参数，将随机投递至一个分区
KeyedMessage<String, String> data = new KeyedMessage<K, V>(String topic, V message);

发送消息

producer.send(data);

关闭producer

producer.close();