CQ5(CRX) bookstore application error

Question

1. I checked out source code fromhttp://dev.day.com/docs/en/crx/current/getting_started/first_steps_with_crx.html#Step%20Two:%20Check%20out%20CRX%20Bookstore%20Example

2. When I tried to invoke http://:4502/products.html

3. Actual result should list the products page from bookstore app

4. I got "Cannot serve request to /products.html in /apps/bookstore/components/ranking/ranking.jsp: What version of the product are you using? On what operating system? I am using CQ5.5 (CRX 2.3) on windows 7 http://code.google.com/p/crxzon/issues/detail?id=4&thanks=4&ts=1362987616

Answer 1

From what I see, you get NullPointerException in RankingServiceImpl:277, because the repository field is null. And the only way I can explain that is that SCR annotations didn't fire during the build.

Said that, I'm actually surprised your bundle started on CQ 5.5, as the dependencies seem to be to earlier versions (5.4 I guess) -- I suggest double checking that under /system/console/bundles (search for CRX - Sample Bookstore Demo). If you're missing imports there, try playing with /src/impl/com.day.crx.sample.bookshop.bnd to update versions as in CQ 5.5, or running it on CQ 5.4.

Answer 2

The annotations in RankingServiceImpl seem to be for an earlier version of CQ and CRX. Here are the changes that I made to get this to work:

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;