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  1. 我从 http://dev.day.com/docs/en/crx/current/getting_started/first_steps_with_crx.html#Step%20Two:%20Check%20out%20CRX%20Bookstore%20Example 查看了源代码

  2. 当我尝试调用 http://:4502/products.html

  3. 实际结果应列出书店应用程序中的产品页面

  4. 我收到“无法在 /apps/bookstore/components/ranking/ranking.jsp 中向 /products.html 提供请求：您使用的是什么版本的产品？在什么操作系统上？我正在使用 CQ5.5 (CRX 2.3) Windows 7 http://code.google.com/p/crxzon/issues/detail?id=4&thanks=4&ts=1362987616
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2 回答 2

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RankingServiceImpl 中的注释似乎是针对早期版本的 CQ 和 CRX。以下是我为使其正常工作所做的更改：

import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Reference;


/**
 * Default implementation of the ranking service.
 * The ranking is updated through observation (based on OSGi events).
 * The service can be used by clients to get the highest ranked products.
 */
@Component(immediate = true)
@Service(value = RankingService.class)
@Property(name = org.osgi.service.event.EventConstants.EVENT_TOPIC, value = SlingConstants.TOPIC_RESOURCE_ADDED)
public class RankingServiceImpl
    implements RankingService, EventHandler, Runnable {

    private Logger logger = LoggerFactory.getLogger(this.getClass());
    // private Logger logger = LoggerFactory.getLogger("RankingServiceImpl");


    private static final String PROPERTY_PREV_RANKING = "lowerRankingRef";
    private static final String PROPERTY_NEXT_RANKING = "higherRankingRef";

    private static final int SHOW_HIGHEST_RANKING = 3;

    /** Flag for stopping the background service. */
    private volatile boolean running = false;

    /** A local queue for handling new orders. */
    protected final BlockingQueue<String> orders = new LinkedBlockingQueue<String>();

    @Reference
    private SlingRepository repository;

    @Reference
    private ResourceResolverFactory resourceResolverFactory;
于 2013-12-20T05:33:00.993 回答
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从我所见，你得到 NullPointerException in RankingServiceImpl:277，因为该repository字段为空。我可以解释的唯一方法是在构建过程中没有触发 SCR 注释。

话虽如此，我实际上很惊讶您的捆绑包从 CQ 5.5 开始，因为依赖项似乎是早期版本（我猜是 5.4）——我建议在/system/console/bundles（搜索CRX - Sample Bookstore Demo）下仔细检查。如果您在那里缺少导入，请尝试/src/impl/com.day.crx.sample.bookshop.bnd像在 CQ 5.5 中那样更新版本，或者在 CQ 5.4 上运行它。

于 2013-03-11T08:18:18.270 回答