技術標籤：kafka生產者kafkakafka

同步傳送

意思：一條訊息傳送後，會阻塞當前執行緒，直至返回ack。send返回的結果時future物件

package com.ln.kafka.producer;

import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.
 
kafka.clients.producer.RecordMetadata;
import org.apache.kafka.common.serialization.StringSerializer;

import java.util.ArrayList;
import java.util.Properties;
import java.util.concurrent.ExecutionException;

/**
 * @ProjectName: kafka
 * @Package: com.ln.kafka.producer
 * @Name:SyncProducer
 * @Author:linianest
 * @CreateTime:2021/1/8 9:16
 * @version:1.0
 * @Description TODO:kafka同步傳送訊息
 */
 

public class SyncProducer {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        Properties props = new Properties();
        props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "hadoop101:9092");
        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,
 
 StringSerializer.class.getName());
        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
        props.put(ProducerConfig.ACKS_CONFIG, "all");
        // 每批次傳送數量大小
        props.put(ProducerConfig.BATCH_SIZE_CONFIG, 16384);
        // 等待時間
        props.put(ProducerConfig.LINGER_MS_CONFIG, 1);

        // 攔截器
        ArrayList<String> interceptors = new ArrayList<>();
        interceptors.add("com.ln.kafka.interceptor.TimeInterceptor");
        interceptors.add("com.ln.kafka.interceptor.CounterInterceptor");
        props.put(ProducerConfig.INTERCEPTOR_CLASSES_CONFIG, interceptors);

        // 建立物件
        KafkaProducer<String, String> producer = new KafkaProducer<>(props);
        // 傳送資料

        for (int i = 0; i < 1000; i++) {
            /**
             * // 等待時間,如果batch.size沒達到，靠LINGER_MS_CONFIG傳送
             * props.put(ProducerConfig.LINGER_MS_CONFIG, 1);
             */
            RecordMetadata metadata = producer.send(new ProducerRecord<String, String>("first", i + "", "message-" + i)).get();
            System.out.println("offset=" + metadata.offset());
        }
        // 關閉資料流
        producer.close();
    }
}