// 示例代碼：使用 Kafka 事務(wù)
producer.initTransactions();
try {
   
   
    producer.beginTransaction();
    producer.send(new ProducerRecord<>("my-topic", "key", "value"));
    producer.send(new ProducerRecord<>("my-other-topic", "key", "value"));
    producer.commitTransaction();
} catch (ProducerFencedException | OutOfOrderSequenceException | AuthorizationException e) {
   
   
    producer.close();
} catch (KafkaException e) {
   
   
    producer.close();
    throw e;
}

// 示例代碼：多線程消費者
properties.put("max.poll.records", 500);
properties.put("max.poll.interval.ms", 300000);

Consumer<String, String> consumer = new KafkaConsumer<>(properties);

// 訂閱主題 "my-topic"
consumer.subscribe(Collections.singletonList("my-topic"));

// 多線程消費消息
int numberOfThreads = 5;
ExecutorService executor = Executors.newFixedThreadPool(numberOfThreads);
while (true) {
   
   
    ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));
    for (ConsumerRecord<String, String> record : records) {
   
   
        executor.submit(() -> processRecord(record));
    }
}

// 關(guān)閉消費者
consumer.close();
executor.shutdown();

// 示例代碼：自定義序列化器
public class CustomSerializer implements Serializer<MyObject> {
   
   
    @Override
    public byte[] serialize(String topic, MyObject data) {
   
   
        // 實現(xiàn)自定義序列化邏輯
    }
}