如何在Spring Integration Java DSL中定制消息聚合逻辑

@Bean
public IntegrationFlow customAggregationFlow() {
    return IntegrationFlows.from("inputChannel")
            .aggregate(aggregatorSpec -> aggregatorSpec
                    .correlationStrategy(message -> {
                        // 根据消息的某个属性进行分组
                        return message.getHeaders().get("groupKey");
                    })
                    .releaseStrategy(group -> {
                        // 定义何时释放聚合的消息
                        return group.size() >= 10;
                    })
                    .expireGroupsUponCompletion(true)
                    .sendPartialResultOnExpiry(true)
                    .outputProcessor(group -> {
                        // 对聚合的消息进行处理
                        List<Message<?>> messages = new ArrayList<>(group.getMessages());
                        // 在这里可以编写自定义的聚合逻辑
                        // ...
                        return MessageBuilder.withPayload(aggregatedMessage).build();
                    })
                    .messageStore(messageStore()))
            .handle("aggregatedMessageHandler", "handleAggregatedMessage")
            .get();
}

@Bean
public MessageStore messageStore() {
    // 配置消息存储器，用于持久化聚合的消息
    return new SimpleMessageStore();
}

@Component
public class AggregatedMessageHandler {
    public void handleAggregatedMessage(Message<?> message) {
        // 处理聚合后的消息
        // ...
    }
}