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Nikhil-Kumar
Community Advisor
Nikhil-KumarCommunity Advisor
Community Advisor
November 22, 2022
Solved

resource adapted to ContentFragment throws null in AEM service Impl

  • November 22, 2022
  • 3 replies
  • 4479 views

Hi All,

In my aem service impl, when I am adapting my resource to ContentFragment Object it returns null CF object.
Although my resource is not null and I can see my resource path as well. 

Thanks!

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Best answer by Nikhil-Kumar

At the end figures out the issue, I know it was a blunder, 
I guess the issue was that we need to give permissions to /conf/myproject along with /content/dam/project.
And I guess CF api ONLY works when we have access to both. Rather Node and Resource API work with only access to /content/dam

3 replies

krati_garg
Adobe Employee
krati_gargAdobe Employee
Adobe Employee
November 22, 2022

@nikhil-kumar Try validating from below Code Snippet

https://engineering.icf.com/aem-content-fragments-as-an-api/#:~:text=Creating%20a%20content%20fragment%20API

 

If it is still not resolved, kindly share your Code Snippet

    Nikhil-Kumar
    Community Advisor
    Nikhil-KumarCommunity AdvisorAuthor
    Community Advisor
    November 22, 2022

    @krati_garg - Yes I am trying the same approach, but it gives null values after adapting the resource to CF.

    Here is my code snippet:

    package com.myproject.core.services.impl;

    import java.io.IOException;
    import java.io.UnsupportedEncodingException;
    import java.net.URLDecoder;
    import java.util.Base64;
    import java.util.Collections;
    import java.util.Enumeration;
    import org.apache.sling.api.resource.LoginException;
    import org.apache.sling.api.resource.Resource;
    import org.apache.sling.api.resource.ResourceResolver;
    import org.apache.sling.api.resource.ResourceResolverFactory;
    import org.apache.sling.serviceusermapping.ServiceUserMapped;
    import org.osgi.service.component.annotations.Activate;
    import org.osgi.service.component.annotations.Component;
    import org.osgi.service.component.annotations.Reference;
    import org.osgi.service.component.propertytypes.ServiceRanking;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;

    import javax.jcr.query.Query;
    import java.util.Collections;
    import java.util.Iterator;
    import java.util.Map;

    import org.apache.commons.lang3.StringUtils;
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.client.HttpClient;
    import org.apache.http.client.ResponseHandler;
    import org.apache.http.client.config.RequestConfig;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.entity.StringEntity;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.util.EntityUtils;
    import org.apache.sling.api.SlingHttpServletRequest;
    import org.apache.sling.api.resource.Resource;
    import org.apache.sling.api.resource.ResourceResolverFactory;
    import org.osgi.service.component.annotations.Activate;
    import org.osgi.service.component.annotations.Component;
    import org.osgi.service.component.annotations.ConfigurationPolicy;
    import org.osgi.service.component.annotations.Reference;
    import org.osgi.service.metatype.annotations.AttributeDefinition;
    import org.osgi.service.metatype.annotations.AttributeType;
    import org.osgi.service.metatype.annotations.Designate;
    import org.osgi.service.metatype.annotations.ObjectClassDefinition;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;

    import com.adobe.cq.dam.cfm.ContentElement;
    import com.adobe.cq.dam.cfm.ContentFragment;
    import com.day.cq.commons.Externalizer;
    import com.google.gson.Gson;
    import com.google.gson.JsonArray;
    import com.google.gson.JsonObject;
    import com.google.gson.JsonPrimitive;
    import com.myproject.core.models.TeamMemberContentFragment;
    import com.myproject.core.services.SearchService;

    import com.myproject.core.services.TeamMemberPageService;
    import com.myproject.core.utils.LinkUtils;
    import org.apache.sling.api.resource.ResourceResolver;
    import java.util.Optional;
    import com.adobe.cq.dam.cfm.FragmentTemplate;

    @Component(immediate = true, service = TeamMemberPageService.class, name = "com.myproject.core.services.TeamMemberPageService", configurationPolicy = ConfigurationPolicy.REQUIRE, property = {
    "service.vendor=myproject", "service.description=myproject - Team Member Service" })
    @Designate(ocd = TeamMemberPageServiceImpl.Config.class)
    public class TeamMemberPageServiceImpl implements TeamMemberPageService {

    public static final Logger LOGGER = LoggerFactory.getLogger(TeamMemberPageService.class);

    @ObjectClassDefinition(name = "myproject - Team Mmeber Service Configuration", description = "Configuration for Team Mmeber Service Configuration.")
    public @interface Config {

    @AttributeDefinition(name = "Enable Create Bio Page", description = "This enables Create Dynamic Bio Page.", type = AttributeType.BOOLEAN)
    public boolean enableCreateBioPage();

    @AttributeDefinition(name = "Team Mmeber Source Content Fragment Path", description = "Team Mmeber Source Content Fragment Path.")
    String teamMemeberSourceCfPath()

    default "/content/dam/myproject/content-fragments/team-members";

    @AttributeDefinition(name = "Team Mmeber Destination Page Path", description = "Team Mmeber Destination Page Path.")
    String teamMemeberDestinationPagePath()

    default "/content/myproject/us/en/team-members";

    }

    private Config config;



    @Reference
    private ResourceResolverFactory resourceResolverFactory;

    @Activate
    public void activate(Config config) {
    this.config = config;

    }

    private Optional<ContentFragment> contentFragment;

    @Override
    public void createTeamMmeberPages(String path) {
    LOGGER.info("Inside the Teams Service");

    final Map<String, Object> authInfo = Collections.singletonMap(
    ResourceResolverFactory.SUBSERVICE, "readWriteServiceUser");

    try (ResourceResolver serviceResolver = resourceResolverFactory.getServiceResourceResolver(authInfo)) {

    Resource resource = serviceResolver
    .resolve(path);

    LOGGER.info("Resource OBJECT: {} " + resource);
    LOGGER.info("Resource Value: {} " + resource.getPath());

    contentFragment = Optional.ofNullable(resource.adaptTo(ContentFragment.class));

    LOGGER.info("CF: {} " + contentFragment);

    String cfValue = contentFragment
    .map(cf -> cf.getElement("name"))
    .map(ContentElement::getContent)
    .orElse(StringUtils.EMPTY);

    LOGGER.info("content cf: {} " + cfValue);


    } catch (LoginException e) {
    LOGGER.error("Login Exception when obtaining a User for the Bundle Service: {} ", e);
    }

    }

    }

      krati_garg
      Adobe Employee
      krati_gargAdobe Employee
      Adobe Employee
      November 22, 2022

      Also, I can adapt my resource to a Node without any issue in my service impl. But it doesn't resolve the resource to ContentFragment in my service impl.

      It's bit weird! 


      Hi @nikhil-kumar 

      With above comment, it feels the service user does not have required access to adapt to a Content Fragment, and just default JCR permissions.

      Can you please share the ACL permissions for the readWriteServiceUser, especially over content/dam?

      It should have required read/write access over Content Fragment Folder, you are trying to access in the code.

        Abhishek_Narula25
        Abhishek_Narula25
        Level 3
        November 22, 2022

        Try using below code, if you have the request object:

         

        • import org.apache.sling.models.factory.ModelFactory;
        • @OSGiService

                 private ModelFactory modelFactory;

        • ContentFragment cf = modelFactory.getModelFromWrappedRequest(request, resource, ContentFragment.class);

        https://github.com/kiransg89/LinkedContentFragment/blob/main/LinkedContentFragmentImpl.java

         

        Maybe this might help!

          Nikhil-Kumar
          Community Advisor
          Nikhil-KumarCommunity AdvisorAuthor
          Community Advisor
          November 22, 2022

          Nope this didn't helped!

            SantoshSai
            Community Advisor
            SantoshSaiCommunity Advisor
            Community Advisor
            November 22, 2022

            Hi @nikhil-kumar ,

            Can you try this?

            ContentFragment CF = resourceResolver.getResource(path).adaptTo(ContentFragment.class);

            or in your case

            Resource resource = serviceResolver.getResource(path); //instead .resolve(path);

            Regards,

            Santosh

            Santosh Sai
              Nikhil-Kumar
              Community Advisor
              Nikhil-KumarCommunity AdvisorAuthorAccepted solution
              Community Advisor
              November 23, 2022

              At the end figures out the issue, I know it was a blunder, 
              I guess the issue was that we need to give permissions to /conf/myproject along with /content/dam/project.
              And I guess CF api ONLY works when we have access to both. Rather Node and Resource API work with only access to /content/dam

                krati_garg
                Adobe Employee
                krati_gargAdobe Employee
                Adobe Employee
                November 23, 2022

                Almost inline with my last comment. Hope you read it, before finding it on your own. Could have saved some of your time @nikhil-kumar 

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