Tech Mastery: Deep Dives into AEM, Cloud Technologies, AI Innovations, and Advanced Marketing Strate

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();
}

Browser cookie values are not setting in IE10 and IE11

While trying to set the cookies in IE10 and IE11 through Java, the values are not stetting in the browser.

The code snippet used to set the cookie is

cookie = new javax.servlet.http.Cookie(cookieHeaderName,"Sample Cookie");
cookie.setPath("/");
ookie.setMaxAge(365*24*60*60);
cookie.setSecure(false);
cookie.setVersion(0);
response.addCookie(cookie);

After long struggle we found the issue might be with the value of Expires is not set, IE10 and IE11 expecting the value for Expires and it is not considering the value set in Max-Age.

Fix for the issue - Use the below code to set the cookie value

int expiration = 365*24*60*60;
StringBuilder cookieString = new StringBuilder("TestCookie=Test; ");

DateFormat df = new SimpleDateFormat("EEE, dd-MMM-yyyy HH:mm:ss 'GMT'", Locale.US);
Calendar cal = Calendar.getInstance();
cal.add(Calendar.SECOND, expiration);
cookieString.append("Expires=" + df.format(cal.getTime()) + "; ");
//cookieString.append("Domain="+request.getServerName()+"; ");
cookieString.append("Version=0; ");
cookieString.append("Path=/; ");
cookieString.append("Max-Age=" + expiration + "; ");
cookieString.append("HttpOnly");
response.addHeader("Set-Cookie", cookieString.toString());

How to connect to oracle database using datasource pool from OSGI- Adobe Experience Manager(AEM)

This post will explain how to connect to oracle database using datasource pool from Adobe Experience Manager(AEM)

Convert the JDBC driver to OSGI bundle:

In eclipse - File-->New-->Plug-in Development-->Plug-in from Existing JAR Archives
Click on Add External and Select the JDBC jar file


Click Next and enter the required details

Project name - OracleDriver
Plug-in ID - com.jdbc.oracle
Plug-in vendor - Oracle
Select the Execute Environment
Select an OSGi framework and select standard
Un-Select Unzip the JAR archives into the project and select Update references to the JAR files.

How to Customize/Configure the 404 error handler for multi sites in AEM/Adobe CQ5?

This post will explain how to configure the 404 error handler in multi site scenario for Adobe Experience Manager(AEM) - This will configure different 404 pages for different sites..

If the error handler is configured for first time then copy /libs/sling/servlet/errorhandler to /apps/sling/servlet (create the folder structure before copying )

Modify /apps/sling/servlet/errorhandler/404.jsp file to modify the 404 error handling rules.

<%  
//setting response code as 404
response.setStatus(HttpServletResponse.SC_NOT_FOUND);
try {
    String uri = request.getRequestURI();
         
    if(uri.matches("(/content/Sample/en/)(.*)"))
    {
        pageContext.include("/content/Sample/en/404.html");
    } else if(uri.matches("(/content/Sample/es/)(.*)"))
    {
        pageContext.include("/content/Sample/es/404.html");
    } else if(uri.matches("(/en/)(.*)"))
    {
        pageContext.include("/content/Sample/en/404.html");
    }
    else if(uri.matches("(/es/)(.*)"))
    {
        pageContext.include("/content/Sample/es/404.html");
    } else
    {
        pageContext.include("/content/Sample/en/404.html");
    }

} catch (Exception e) {

%>
        Page Not Found
<%
}

%>

The conditions can be added to handle different sites, if the sites are running on different virtual host names then get the server name from the request
(request.getServerName()) and add the condition based on the server name.

This will redirect the user to site specific 404 pages.

 How to find the Email Group Id in Eloqua? 

This post will explain  how to find the Email Group Id in Eloqua

There will be different approach to find the Email Group id. Here. This post explains the approach used by me.
Use any of the REST client(here i am using Advance Rest Client)

Provide the below URL - https://secure.p03.eloqua.com/API/REST/1.0/assets/email/groups

Select the Http Method as GET

Provide the Authorization header

Authorization: Basic xxxxxxxxxxx

Replace xxxxxxxxxxx with base64 encoded string of companyName\userName:password

Send the request

The response will have all the Email Group id details - id and name of the Emial group can be found in the response.

{
  elements: [2]
  0:  {
         type: "ContactEmailSubscription"
         contactId: "1"
         emailGroup: {
             type: "EmailGroup"
             id: "1"
            depth: "minimal"
            description: ""
            name: "Sample1"
            permissions: "fullControl"
            updatedAt: "1423758721"
           updatedBy: "1"
        }
       isSubscribed: "true"
       updatedAt: "1423219686"
   }
  1:  {
         type: "ContactEmailSubscription"
         contactId: "1"
         emailGroup: {
             type: "EmailGroup"
             id: "2"
            depth: "minimal"
            description: ""
            name: "Sample2"
            permissions: "fullControl"
            updatedAt: "1423758721"
           updatedBy: "1"
        }
       isSubscribed: "true"
       updatedAt: "1423219686"
   }
  page: 1
 pageSize: 1000
 total: 2
}

How to get the child Pages of a root Page through Java API - AEM/Adobe CQ5

This post will explain how to get the child Pages of a root Page through Java API in Adobe Experience Manager(AEM)

public static PageFilter getPageFilter() {
PageFilter pf = new PageFilter();
return pf;
}

public static Iterator<Page> getPageIterator(Page page){
Iterator<Page> children = page. listChildren(getPageFilter());
return children;
}

Filter can be changed to restrict child pages e.g Get the child pages created only with the template "/apps/sample/templates/samplePage"

public static PageFilter getPageFilter() {
PageFilter pf = new PageFilter() {
public boolean includes(Page p) {
ValueMap props = p.getProperties();
String templatePath = props.get("cq:template",String.class);
if("/apps/sample/templates/samplePage".equals(templatePath))
{
return true;
} else
{
return false;
}
}
};
return pf;
}

How to find a Page has child Pages thorough Java API - AEM/Adobe CQ5

This post will explain how to find a Page has child Pages thorough Java API in Adobe Experience Manager(AEM)

public static boolean hasPageChildren(Page rootPage) {
          boolean isTrue = false;
          if (rootPage != null&& rootPage.listChildren(getPageFilter()).hasNext()) {
       isTrue = true;
          }
        return isTrue;
}

public static PageFilter getPageFilter() {
PageFilter pf = new PageFilter();
return pf;
}

How to get the published date of a page through Java API - Adobe Experience Manager(AEM)

This post will explain how to get the published date of a page through Java API in Adobe Experience Manager(AEM)

public static Date getPublishDate(Page page) {
Date newDate = null;
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd", Locale.getDefault());
if (page != null) {
String publishedDate =  page.getProperties().get("publisheddate", "");
if(!"".equals(publishedDate)){
try {
newDate = sdf.parse(publishedDate);
} catch (ParseException e) {

}
}
}
return newDate;
}

How to send the email through Java API in Eloqua

This post explains how to send the email through Eloqua API.

Create the required model classes:

public class EmailTestDeployment 
{ 
    public String contactId ;
    public String sendFromUserId ;
    public Email email;
    public String name;
    public String type;       

}

public class Email 
{
public int emailGroupId;
public RawHtmlContent htmlContent; 
public int id; 
public boolean isPlainTextEditable; 
public String name; 
public String plainText; 
public boolean sendPlainTextOnly; 
public String subject; 

}

public class RawHtmlContent 
{
    public String type;
    public String html;

}

RestClient class to connect to Eloqua:

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class RestClient
{
    private String authToken;
    private String baseUrl;       
    public RestClient(String user, String password, String url)
    {
       baseUrl = url;             
       String authString = user + ":" + password;
      authToken = "Basic " + javax.xml.bind.DatatypeConverter.printBase64Binary(authString.getBytes());           
    }             
                          
    public String execute(String uri, String method, String body)  throws Exception
    {
       String response ="";
       try
       {           
          URL url = new URL(baseUrl + uri);
          HttpURLConnection conn = (HttpURLConnection) url.openConnection();                         
          conn.setInstanceFollowRedirects(false);
          conn.setRequestMethod(method.toString());
          conn.setRequestProperty("Content-Type", "application/json");
          conn.setRequestProperty("Accept", "application/json");
          System.out.println(authToken);
          conn.setRequestProperty("Authorization", authToken);         
                  
          if (method == "POST" || method == "PUT")
          {
              if(null != body){
                  conn.setDoOutput(true);
                  final OutputStream os = conn.getOutputStream();
                  os.write(body.getBytes());
                  os.flush();
                  os.close();
               }
           }
                      
           InputStream is = conn.getInputStream();
           BufferedReader rd = new BufferedReader(new InputStreamReader( is));
           String line; 
           while ((line = rd.readLine()) != null)
           {
               response += line;
           }           
           rd.close();
           conn.disconnect();
         }
         catch (Exception e)
         {
            throw e;
         }
       return response;
      }

}

How to find the id of the existing contact in Eloqua

This post will explain How to find the id of the existing contact in Eloqua

Login to Eloqua
Click on Contacts in main page
Search by entering *, this will return all the contacts.
Open the particular contact.
Select Field Details tab and select All Contact Fields in the drop down.


In the Eloqua Contact ID field ignore CTHOM and all the zeros, consider the last digits as contact id(e.g 109)

How to subscribe the Contact to a EmailGroup through Java API in Eloqua

This post explains how to create the contact in Eloqua through java.

Create the required model classes:

public class EmailGroup
{
public String type;
public String id;
public String depth;
public String description;
public String name;
public String updatedAt;
public String updatedBy;
}

public class Subscription
{
public EmailGroup emailGroup;
public String isSubscribed;
public String contactId;
public String  type;
}

RestClient class to connect to Eloqua:

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class RestClient
{
    private String authToken;
    private String baseUrl;    
    public RestClient(String user, String password, String url)
    {
       baseUrl = url;          
       String authString = user + ":" + password;
      authToken = "Basic " + javax.xml.bind.DatatypeConverter.printBase64Binary(authString.getBytes());        
    }          
                       
    public String execute(String uri, String method, String body)  throws Exception
    {
       String response ="";
       try
       {        
          URL url = new URL(baseUrl + uri);
          HttpURLConnection conn = (HttpURLConnection) url.openConnection();                      
          conn.setInstanceFollowRedirects(false);
          conn.setRequestMethod(method.toString());
          conn.setRequestProperty("Content-Type", "application/json");
          conn.setRequestProperty("Accept", "application/json");
          System.out.println(authToken);
          conn.setRequestProperty("Authorization", authToken);      
               
          if (method == "POST" || method == "PUT")
          {
              if(null != body){
                  conn.setDoOutput(true);
                  final OutputStream os = conn.getOutputStream();
                  os.write(body.getBytes());
                  os.flush();
                  os.close();
               }
           }
                   
           InputStream is = conn.getInputStream();
           BufferedReader rd = new BufferedReader(new InputStreamReader( is));
           String line;
           while ((line = rd.readLine()) != null)
           {
               response += line;
           }        
           rd.close();
           conn.disconnect();
         }
         catch (Exception e)
         {
            throw e;
         }
       return response;
      }
}

How to get the Subscriptions of a Contact through through Java API in Eloqua

This post explains how to create the contact in Eloqua through java.

Create the required  model classes:

public class SubscriptionResponse
{
public List<Subscription> elements;
}

public class Subscription
{
public EmailGroup emailGroup;
public String isSubscribed;
}

public class EmailGroup
{
public String type;
public String id;
public String depth;
public String description;
public String name;
public String updatedAt;
public String updatedBy;
}

RestClient class to connect to Eloqua:

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class RestClient
{
    private String authToken;
    private String baseUrl;    
    public RestClient(String user, String password, String url)
    {
       baseUrl = url;          
       String authString = user + ":" + password;
      authToken = "Basic " + javax.xml.bind.DatatypeConverter.printBase64Binary(authString.getBytes());        
    }          
                       
    public String execute(String uri, String method, String body)  throws Exception
    {
       String response ="";
       try
       {        
          URL url = new URL(baseUrl + uri);
          HttpURLConnection conn = (HttpURLConnection) url.openConnection();                      
          conn.setInstanceFollowRedirects(false);
          conn.setRequestMethod(method.toString());
          conn.setRequestProperty("Content-Type", "application/json");
          conn.setRequestProperty("Accept", "application/json");
          System.out.println(authToken);
          conn.setRequestProperty("Authorization", authToken);      
               
          if (method == "POST" || method == "PUT")
          {
              if(null != body){
                  conn.setDoOutput(true);
                  final OutputStream os = conn.getOutputStream();
                  os.write(body.getBytes());
                  os.flush();
                  os.close();
               }
           }
                   
           InputStream is = conn.getInputStream();
           BufferedReader rd = new BufferedReader(new InputStreamReader( is));
           String line;
           while ((line = rd.readLine()) != null)
           {
               response += line;
           }        
           rd.close();
           conn.disconnect();
         }
         catch (Exception e)
         {
            throw e;
         }
       return response;
      }
}

How to check the replication status through java API in AEM/Adobe CQ5

This post will explain how to check the replication status through java API in Adobe Experiance Manager(AEM)/Adobe CQ5

Maven dependency:

Add the following dependency to the pom.xml

<dependency>
<groupId>com.adobe.granite</groupId>
<artifactId>com.adobe.granite.replication.core</artifactId>
<version>5.12.2</version>
<scope>provided</scope>
</dependency>

API's:

@Reference
Replicator replicator;

@Reference
SlingRepository repository;

Session  session = repository.loginAdministrative(null);
ReplicationStatus status=replicator.getReplicationStatus(session, “nodepath”);

status.isDelivered();//Checks if the content is delivered

Other methods to get the different status

isActivated()
isDeactivated
isPending()

org.osgi.framework.ServiceException: Service cannot be cast: javax.servlet.Servlet - Adobe Experience Manager(AEM)

I was getting the below exception while invoking the servlet from Adobe Experience Manager(AEM) bundle.

15.02.2015 20:58:11.615 *ERROR* [FelixDispatchQueue] FrameworkEvent ERROR (org.osgi.framework.ServiceException: Service cannot be cast: javax.servlet.Servlet) org.osgi.framework.ServiceException: Service cannot be cast: javax.servlet.Servlet
at org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:332)
at org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:219)
at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:320)
at org.apache.felix.framework.Felix.getService(Felix.java:3556)
at org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:468)

 The root cause of the problem is different versions of servlet API classes are loaded by two different class-loaders.

To fix the issue make sure <scope>provided</scope> is added for the Servlet API dependency in POM.xml

<dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.4</version>
      <scope>provided</scope>
</dependency>