深度解析Kafka消息队列的实现原理以及性能优化策略

// 生产者代码
Properties properties = new Properties();
properties.put("bootstrap.servers", "localhost:9092");
properties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
properties.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");

Producer<String, String> producer = new KafkaProducer<>(properties);

for (int i = 0; i < 100; i++) {
  String key = "key" + i;
  String value = "value" + i;
  ProducerRecord<String, String> record = new ProducerRecord<>("my-topic", key, value);

  producer.send(record);
}

producer.close();

// 消费者代码
Properties properties = new Properties();
properties.put("bootstrap.servers", "localhost:9092");
properties.put("group.id", "my-group");
properties.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
properties.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");

KafkaConsumer<String, String> consumer = new KafkaConsumer<>(properties);
consumer.subscribe(Collections.singletonList("my-topic"));

while (true) {
  ConsumerRecords<String, String> records = consumer.poll(100);

  for (ConsumerRecord<String, String> record : records) {
    System.out.println(record.key() + ": " + record.value());
  }
}

consumer.close();