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How to create/manage the groups and users through Java API in AEM/Adobe CQ5?

This post will explain how to create/manage the groups and users through Java API in Adobe Experience Manager(AEM).

import java.io.IOException;
import java.security.Principal;

import javax.jcr.PropertyType;
import javax.jcr.Session;
import javax.jcr.Value;
import javax.servlet.Servlet;

import org.apache.commons.lang.StringUtils;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.apache.jackrabbit.api.security.user.Group;
import org.apache.jackrabbit.api.security.user.User;
import org.apache.jackrabbit.api.security.user.UserManager;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ResourceResolverFactory;
import org.apache.sling.api.servlets.SlingAllMethodsServlet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Service(value = Servlet.class)
@Component(immediate = true, metatype = true)
@Properties({
@Property(name = "sling.servlet.paths", value = "/services/manageGroupsAndUsers"),
@Property(name = "service.description", value = "ManageGroupsAndUsers"),
@Property(name = "label", value = "ManageGroupsAndUsers") })

public class ManageGroupsAndUsers extends SlingAllMethodsServlet{

/**
*
*/
private static final long serialVersionUID = 1L;

@Reference
ResourceResolverFactory resolverFactory;

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

protected final void doPost(final SlingHttpServletRequest request,
final SlingHttpServletResponse response) throws IOException {

String groupName="sampleGroup";
String userName="sampleUser";
String password="sampleUser";

ResourceResolver adminResolver = null;
Session adminSession=null;
try {
      adminResolver = resolverFactory.getAdministrativeResourceResolver(null);
      adminSession = adminResolver.adaptTo(Session.class);
      final UserManager userManager= adminResolver.adaptTo(UserManager.class);
         
     if(null==userManager.getAuthorizable(groupName)){
   
     Group group=userManager.createGroup(groupName,new SimplePrincipal(groupName),"/home/groups/test");
   
     Value value=adminSession.getValueFactory().createValue("Sample Group", PropertyType.STRING);
     group.setProperty("./profile/givenName", value);
   
     value=adminSession.getValueFactory().createValue("Test Group", PropertyType.STRING);
     group.setProperty("./profile/aboutMe", value);
   
     value=adminSession.getValueFactory().createValue("[email protected]", PropertyType.STRING);
     group.setProperty("./profile/email", value);    
         
      }else{
     response.getWriter().write("Group already exist..");
      }
   
     if(userManager.getAuthorizable(userName)==null){
     User user=userManager.createUser(userName, password,new SimplePrincipal(userName),"/home/users/test");
     Value value=adminSession.getValueFactory().createValue("Issac", PropertyType.STRING);
     user.setProperty("./profile/familyName", value);
   
     value=adminSession.getValueFactory().createValue("Albin", PropertyType.STRING);
     user.setProperty("./profile/givenName", value);
   
     value=adminSession.getValueFactory().createValue("Test User", PropertyType.STRING);
     user.setProperty("./profile/aboutMe", value);
   
     value=adminSession.getValueFactory().createValue("[email protected]", PropertyType.STRING);
     user.setProperty("./profile/email", value);    
   
      }else
      {
      response.getWriter().write("User already exist..");
      }
   
   
     Group group = (Group)(userManager.getAuthorizable(groupName));
     group.addMember(userManager.getAuthorizable(userName));
                     
} catch (Exception e) {
e.printStackTrace();
response.getWriter().write("Not able to perform User Management.."+resolverFactory);
} finally {
      if (adminResolver != null) adminResolver.close();
         
}

}

protected final void doGet(final SlingHttpServletRequest request,
final SlingHttpServletResponse response) throws IOException {
doPost(request, response);
}

How to create different renditions for the Image in AEM/Adobe CQ5?

While uploading the images to DAM,Adobe Experience Manager(AEM) will create renditions of an image that include different sizes of the same image.This can be helpful when we need to create thumbnails or smaller views of large, high-resolution images.



We can configure the DAM Update Asset workflow to create the different renditions.

• Login to http://localhost:4502/etc/workflow/models/dam/update_asset.html
• In the workflow model select the thumbnail creation step and edit, in the process tab of the step we can add custom rendition values.
• Save the workflow

How to use HTML5 adaptive image in AEM/Adobe CQ5?

This post will explain how to use HTML5 adaptive image in Adobe Experience Manager(AEM)

The srcset attribute in HTML5 <img> element, allows us to specify different images for varying viewport widths and pixel densities. This allows us to load a larger image for new high resolution devices while displaying lower resolution images for others

<img src="image-src.png" srcset="image-1x.png 1x, image-2x.png 2x,image-3x.png 3x, image-4x.png 4x">

The width also can be specified to select the images.

<img src="small.jpg" srcset="medium.jpg 1000w, large.jpg 2000w" alt="Sample Image">
While uploading the images to DAM, Adobe CQ5 will create renditions of an image that include different sizes of the same image.This can be helpful when we need to create thumbnails or smaller views of large, high-resolution images.


The original or different rendition images can be used in HTML5 Adaptive image to display the images based on pixel density of the device,  browser will serve the image based on the resolution of the client.

<img src="/content/dam/Albin/Untitled.jpg/jcr:content/renditions/original" srcset="/content/dam/Albin/Untitled.jpg/jcr:content/renditions/cq5dam.thumbnail.319.319.png 1x,/content/dam/Albin/Untitled.jpg/jcr:content/renditions/original" alt="Sample Image">

NullPointerException:  currentDesign.getDoctype(currentStyle).toRequest(request) - AEM/Adobe CQ5

We were getting the NullpoiterException while accessing the pages in Adobe Experience Manager(AEM)

Caused by: java.lang.NullPointerException
at org.apache.jsp.apps.sample.design.components.pages.pageShell.pageShell_jsp._jspService(pageShell_jsp.java:227)
at org.apache.sling.scripting.jsp.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.apache.sling.scripting.jsp.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:502)
... 117 more

NullpointerException is thrown while getting the Doctype of the page design.

if (currentDesign != null) {
        currentDesign.getDoctype(currentStyle).toRequest(request);
    }

This issue was getting resolved after restarting the server.

After analysis the currentDesign  and currentStyle objects are not null and getDoctype method is throwing NullpoiterException.

The currentStyle  refers to the path (currentStyle.getPath())- /etc/designs/default.

By default /etc/designs/default/jcr:content path will not have cq:doctype property specified.

To resolve the issue we have added the  cq:doctype - html_5 property to /etc/designs/default/jcr:content


If the property is already available then delete the same and add again.

How to enable SSL debug tracing in Weblogic Server?

Add the following start up options to the start up file startWebLogic.cmd/startWebLogic.sh or startManagedWebLogic.cmd/startManagedWebLogic.sh based on which file is used to start the server to enable SSL debug tracing in Weblogic Server.

JAVA_OPTIONS="${JAVA_OPTIONS} -Dweblogic.debug.DebugSecuritySSL=true -Dweblogic.debug.DebugSSL=true -Dweblogic.StdoutDebugEnabled=true -Dweblogic.log.StdoutSeverityLevel=Debug -Dweblogic.log.LogSeverity=Debug"

The Weblogic patch 11866509 based on the Weblogic server version (this issues is identified in Weblogic server version 10.3.4 and 10.3.5) should be installed to resolve the issue.

How to get the UserInfo through Java API in AEM/Adobe CQ5

The below Java API helps to get the UserInfo details in Adobe Experience Manager(AEM)
@Reference
ResourceResolverFactory resolverFactory;

ResourceResolver adminResolver = null;
try {
       adminResolver = resolverFactory.getAdministrativeResourceResolver(null);
       final Session adminSession = adminResolver.adaptTo(Session.class);
       final UserManager userManager = adminResolver.adaptTo(UserManager.class);
       final User user = (User) userManager.getAuthorizable(adminSession.getUserID());
         
       logger.info("user.getID().."+user.getID());
       logger.info("user.isAdmin().."+user.isAdmin());
       logger.info("user.getPrincipal().getName().."+user.getPrincipal().getName());

       String lastName=user.getProperty("./profile/familyName")!=null?user.getProperty("./profile/familyName")[0].getString():null;
     String firstName=user.getProperty("./profile/givenName")!=null?user.getProperty("./profile/givenName")[0].getString():null;
     String aboutMe=user.getProperty("./profile/aboutMe")!=null?user.getProperty("./profile/aboutMe")[0].getString():null;
     String email=user.getProperty("./profile/email")!=null?user.getProperty("./profile/email")[0].getString():null;
   
     logger.info("lastName.."+lastName);
     logger.info("firstName.."+firstName);
     logger.info("aboutMe.."+aboutMe);
     logger.info("email.."+email);
         
       Iterator<Group> itr=user.memberOf();
       while(itr.hasNext())
       {
         Group group=(Group)itr.next();
          logger.info("group.getID().."+group.getID());
           logger.info("group.getPrincipal().getName().."+group.getPrincipal().getName());
        }        
                             
} catch (Exception e) {
        e.printStackTrace();
} finally {
       if (adminResolver != null) adminResolver.close();
}