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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);
}