我有一个服务类,如下所示,我使用 Maven 部署并在 Sling Web 控制台上处于活动状态。当我getSearchAssetNames()
从这个捆绑包访问该方法时,它会根据 AEM 6.0 的 Authoring 实例日志被调用。
但是,诸如存储库、资源解析器工厂、查询生成器之类的隐式对象都通过我使用@Reference
注释派生它们的方式获得空指针异常。
这是该类的代码。我已经尝试删除激活、停用方法、添加启动/停止方法等所有内容,但这仍然不起作用。
错误日志显示:
*01.07.2015 12:05:24.014 INFO [127.0.0.1 [1435732523998] GET /content/test/en/headerfooter/jcr:content/footerpar/testassetfinder..html HTTP/1.1] com.test.example.assetfinder.AssetFinderImpl查询生成器:空 01.07.2015 12:05:24.014 INFO [127.0.0.1 [1435732523998] GET /content/test/en/fordheaderfooter/jcr:content/footerpar/testassetfinder..html HTTP/1.1] com.test.example。 assetfinder.AssetFinderImpl JCR 存储库:null 原因:java.lang.NullPointerException:com.test.example.assetfinder.AssetFinderImpl.getSearchAssetNames 处为 null(AssetFinderImpl.java:61)*
谁能帮我解决这个问题?
package com.test.example.assetfinder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.apache.sling.jcr.api.SlingRepository;
import org.osgi.service.component.ComponentContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.day.cq.search.PredicateGroup;
import com.day.cq.search.Query;
import com.day.cq.search.QueryBuilder;
import com.day.cq.search.result.Hit;
import com.day.cq.search.result.SearchResult;
/**
* Example Asset Finder in AEM DAM.
*/
@Service(value=com.test.example.assetfinder.AssetFinderService.class)
@Component
public class AssetFinderImpl implements AssetFinderService {
@Reference
private QueryBuilder builder;
@Reference
private ResourceResolverFactory resolverFactory;
@Reference
private SlingRepository repository;
private static final Logger LOGGER = LoggerFactory.getLogger(AssetFinderImpl.class);
@Activate
protected void activate(final ComponentContext pCtx) throws RepositoryException {
}
@Deactivate
protected void deactivate(ComponentContext pCtx) throws RepositoryException {
}
public List<String> getSearchAssetNames() {
List<String> assetList = new ArrayList<String>();
Session session = null;
try {
LOGGER.info("Query Builder: " +builder);
LOGGER.info("Resolver Factory: " +resolverFactory);
LOGGER.info("JCR Repository: " +repository);
session = repository.loginAdministrative(null);
Map<String, String> map = new HashMap<String, String>();
map.put("path", "/content/dam");
map.put("type", "dam:Asset");
map.put("nodename", "*example*.*");
map.put("orderby.sort", "asc");
Query query = builder.createQuery(PredicateGroup.create(map), session);
SearchResult result = query.getResult();
// Iterating over the results
for (Hit hit : result.getHits()) {
assetList.add(hit.getTitle());
}
} catch(RepositoryException re) {
re.printStackTrace();
} finally {
if(null != session) {
session.logout();
}
}
return assetList;
}
}