批量消费器使用Apache Camel集成Kafka进行数据的消费。

代码示例：

public class KafkaBatchConsumerRoute extends RouteBuilder {
    
    private final int batchSize = 100;
    private final String brokers = "localhost:9092";
    private final String topic = "test-topic";
    
    @Override
    public void configure() throws Exception {
        
        KafkaComponent kafka = new KafkaComponent();
        Properties props = new Properties();
        props.put("bootstrap.servers", brokers);
        props.put("group.id", "test-group");
        kafka.setConfiguration(props);
        getContext().addComponent("kafka", kafka);
        
        // Consume messages in batches of batchSize
        from("kafka:" + topic + "?groupId=test-group&autoOffsetReset=earliest&maxPollRecords=" + batchSize)
            .split(body(), new BatchAggregationStrategy())
            .log("${body}")
            .to("file:/path/to/output");
    }
    
    private class BatchAggregationStrategy implements AggregationStrategy {
        
        @Override
        public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
            List messages = null;
            if (oldExchange == null) {
                messages = new ArrayList<>();
                messages.add(newExchange.getIn());
                newExchange.getIn().setBody(messages);
                return newExchange;
            } else {
                messages = oldExchange.getIn().getBody(List.class);
                messages.add(newExchange.getIn());
                return oldExchange;
            }
        }
    }
}