ResourceResolverFactory为NULL（Adobe Experience Manager AEM） [英] ResourceResolverFactory is NULL (Adobe Experience Manager AEM)

问题描述

我正尝试从ResourceResolverFactory中获得对ResourceResolver的引用，如下所示：

I am trying to get a reference to the ResourceResolver from the ResourceResolverFactory as follows:

@Reference
private ResourceResolverFactory resourceResolverFactory;

public void someMethod() {
    Map<String, Object> authenticationMap = new HashMap<String, Object>();
        authenticationMap.put(ResourceResolverFactory.USER, "user");
        authenticationMap.put(ResourceResolverFactory.PASSWORD, "pwd");

        //This line returns NullPointerException
        ResourceResolver resourceResolver =   resourceResolverFactory.getResourceResolver(authenticationMap); 
}

有人可以告诉我我做错了什么吗？ AEM API版本v6.0。

Can someone please tell me what I am doing wrong? The AEM API version v6.0.

推荐答案

所以我要做的是创建一个Activator类，当捆绑包被部署并启动。然后，Activator类获取org.apache.sling.jcr.api.SlingRepository的实例，我们可以使用该实例连接到JCR。这是激活代码：

So what I did was to create an Activator class that is called when the bundle is deployed and started. The Activator class then gets the instance of org.apache.sling.jcr.api.SlingRepository which we can use to connect to the JCR. Here is the activator code:

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.sling.api.resource.ResourceResolverFactory;
import org.apache.sling.jcr.api.SlingRepository;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Component(immediate = true, label = "Commons Activator")
public class Activator implements BundleActivator { 

@Reference
private SlingRepository repository;

private static final Logger logger = LoggerFactory.getLogger(Activator.class);

@Activate
@Override
public void start(BundleContext context) throws Exception {
    logger.info(context.getBundle().getSymbolicName() + " started");

    //My own factory class instance
    ResourceResolverDiscoveryService rrf = ResourceResolverDiscoveryService.getInstance();
    //Set the 'repository' in your factory class instance
    rrf.setSlingRepositoryFactory(repository);
}

@Deactivate
@Override
public void stop(BundleContext context) throws Exception {
    logger.info(context.getBundle().getSymbolicName() + " stopped");
}

}

然后在我想上的课上使用JCR来存储数据，我做了以下操作：

Then in the class where I want to use JCR to store the data I did the following:

public class StoreInJCR {
  public void store(Quote quote) throws LoginException, RepositoryException {
        SlingRepository slingRepository = ResourceResolverDiscoveryService.getInstance().getSlingRepositoryFactory();

        // GOT IT!!! Mission Accomplished
        Session session = slingRepository.loginAdministrative(null);
        Node root = session.getRootNode();
        // Further code
        .
        .
  }
}

希望有人觉得这很有用。

Hope someone finds this useful.

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