统一消息系统

public class Message {

private String sender;

private String receiver;

private String content;

// 构造函数，getters和setters省略

}

]]>

import org.apache.kafka.clients.producer.KafkaProducer;

import org.apache.kafka.clients.producer.ProducerRecord;

Properties props = new Properties();

props.put("bootstrap.servers", "localhost:9092");

props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");

props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");

KafkaProducer producer = new KafkaProducer<>(props);

producer.send(new ProducerRecord<>("message-topic", "message-key", message.toString()));

producer.close();

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数据分析平台

import org.apache.kafka.clients.consumer.ConsumerRecord;

import org.apache.kafka.clients.consumer.ConsumerRecords;

import org.apache.kafka.clients.consumer.KafkaConsumer;

Properties props = new Properties();

props.put("bootstrap.servers", "localhost:9092");

props.put("group.id", "test-group");

props.put("enable.auto.commit", "true");

props.put("auto.commit.interval.ms", "1000");

props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");

props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");

KafkaConsumer consumer = new KafkaConsumer<>(props);

consumer.subscribe(Arrays.asList("message-topic"));

while (true) {

ConsumerRecords records = consumer.poll(Duration.ofMillis(100));

for (ConsumerRecord record : records)

System.out.printf("offset = %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());

}

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