kafka客户端生产者

public class KafkaProducerAnalysis {
    public static final String brokerList = "HOSTNAME:9092";
    public static final String topic = "quickstart-events";

    public static Properties initConfig() {
        Properties props = new Properties();
        props.put("bootstrap.servers", brokerList);
        props.put("key.serializer",
                "org.apache.kafka.common.serialization.StringSerializer");
        props.put("value.serializer",
                "org.apache.kafka.common.serialization.StringSerializer");
        props.put("client.id", "producer.client.id.demo");
        return props;
    }

    public static Properties initNewConfig() {
        Properties props = new Properties();
        props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, brokerList);
        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,
                "org.apache.kafka.common.serialization.StringSerializer");
        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,
                "org.apache.kafka.common.serialization.StringSerializer");
        props.put(ProducerConfig.CLIENT_ID_CONFIG, "producer.client.id.demo");
        return props;
    }

    public static Properties initPerferConfig() {
        Properties props = new Properties();
        props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, brokerList);
        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,
                StringSerializer.class.getName());
        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,
                StringSerializer.class.getName());
        return props;
    }

    public static void main(String[] args) throws InterruptedException {
        Properties props = initNewConfig();
        KafkaProducer<String, String> producer = new KafkaProducer<>(props);

//        KafkaProducer<String, String> producer = new KafkaProducer<>(props,
//                new StringSerializer(), new StringSerializer());

        ProducerRecord<String, String> record = new ProducerRecord<>(topic, "hello, Kafka!");
        try {
//            producer.send(record);
            producer.send(record, new Callback() {
                @Override
                public void onCompletion(RecordMetadata metadata, Exception exception) {
                    if (exception == null) {
                        System.out.println("get:"+metadata.partition() + ":" + metadata.offset());
                    }
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }

        TimeUnit.SECONDS.sleep(5);
    }

}