CQ - MailServiceHelper Failed while sending email java.lang.NullPointerException | Community
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Anonymous
October 16, 2015
Solved

CQ - MailServiceHelper Failed while sending email java.lang.NullPointerException

  • October 16, 2015
  • 3 replies
  • 1904 views

Hi guys,

 

I am trying to send email with Adobe CQ API.

But i am getting a nullpointer exception at this line:  MsgGateway.send(htmlEmail);    

 

This is my method that i am using to send.

 

import com.day.cq.mailer.MessageGateway;

import com.day.cq.mailer.MessageGatewayService;

import javax.mail.internet.InternetAddress;

..

...

....

 

   public boolean sendHtmlEmail(SlingHttpServletRequest sling,

            String fromMailAdress, List<String> recepientmailAddress,

            String emailSubject, String htmlbodyMail) {

 

        HtmlEmail htmlEmail = new HtmlEmail();

       

        List<InternetAddress> emailAddress = new ArrayList<InternetAddress>();

 

 

        try {

            for (String recipient : recepientmailAddress) {

                if (!StringUtil.isEmpty(recipient)) {

                    emailAddress.add(new InternetAddress(recipient));

                    log.error(recipient);

                }

            }

            if (!StringUtil.isEmpty(fromMailAdress)) {

                htmlEmail.setFrom(fromMailAdress);

            }

 

            htmlEmail.setTo(emailAddress);

            htmlEmail.setSubject(emailSubject);

            htmlEmail.setHtmlMsg(htmlbodyMail);

            htmlEmail.setCharset("utf-8");

 

            MessageGatewayService MsgService = getMessageGateWayService(sling);

            MessageGateway<HtmlEmail> MsgGateway = MsgService.getGateway(HtmlEmail.class);

           

            MsgGateway.send(htmlEmail);   //nullpointer exception caught here        

            return true;

 

        } catch (Exception e) {

            log.error("Failed while sending email", e);

        }

        return false;

    }

 

 

I have checked to ensure the bundle com.day.cq.cq-mail and my own bundle is running .

I am also sure that 'htmlEmail' is not null by retrieving the email subject via .getSubject and it did return me the subject.

 

I do not understand what is returning the nullpointerexception.

 

I also tried using 

 

@Reference

private MessageGateway<HtmlEmail> msgGateway;

 

and then call send on msgGateway as msgGateway.send(htmlEmail)

 

but it returns a "Reference cannot be resolved to a type" error.

 

Thanks in advance !

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    Best answer by Ove_Lindström

    Hi,

    first, it would be easier to read the code if you used the Java Coding convention and not name your variable names with capital letter first. As an example

    MessageGatewayService MsgService = getMessageGateWayService(sling);

    MessageGateway<HtmlEmail> MsgGateway = MsgService.getGateway(HtmlEmail.class);

    would be

    MessageGatewayService msgService = getMessageGateWayService(sling);

    MessageGateway<HtmlEmail> msgGateway = msgService.getGateway(HtmlEmail.class);

    That way it is easier to see what is a class and what is an instance. The first notation signals to me that the MsgService.getGateway(HtmlEmail.class) is a static method in the class MsgService.

     

    Second: The preferred way of getting a reference to a service is to use annotations.

    @Reference private MessageGatewayService messageGatewayService;

    A good example on using the MessageGatewayService is found at http://labs.sixdimensions.com/blog/dklco/2012-08-20/sending-email-adobe-cq-api

    /Ove

    3 replies

    J
    JitendraBansal
    Level 2
    October 16, 2015
    First check your SMTP mail configurations in DAY CQ Mail Service (com.day.cq.mailer.DefaultMailService ). Then you can proceed as: 

        import com.day.cq.mailer.MessageGateway;
        import com.day.cq.mailer.MessageGatewayService;
        
        @Reference
        private MessageGateway<HtmlEmail> messageGateway;

        @Reference
        private MessageGatewayService messageGatewayService;
        
        messageGateway = messageGatewayService.getGateway(HtmlEmail.class);

        messageGateway.send(htmlEmail);

    klcodanr85
    klcodanr85
    Level 2
    October 16, 2015

    I would not recommend referencing a particular MessageGateway directly, instead I would recommend retrieving it from the ReferenceGatewayService:

    http://labs.sixdimensions.com/blog/dklco/2012-08-31/messagegatewayservice-vs-messagegateway

    Generally, the issue you're indicating means that you need to configure the Day CQ Mail Service, you can update it here:

    http://localhost:4502/system/console/configMgr/com.day.cq.mailer.DefaultMailService

      O
      Ove_LindströmAccepted solution
      Level 6
      October 16, 2015

      Hi,

      first, it would be easier to read the code if you used the Java Coding convention and not name your variable names with capital letter first. As an example

      MessageGatewayService MsgService = getMessageGateWayService(sling);

      MessageGateway<HtmlEmail> MsgGateway = MsgService.getGateway(HtmlEmail.class);

      would be

      MessageGatewayService msgService = getMessageGateWayService(sling);

      MessageGateway<HtmlEmail> msgGateway = msgService.getGateway(HtmlEmail.class);

      That way it is easier to see what is a class and what is an instance. The first notation signals to me that the MsgService.getGateway(HtmlEmail.class) is a static method in the class MsgService.

       

      Second: The preferred way of getting a reference to a service is to use annotations.

      @Reference private MessageGatewayService messageGatewayService;

      A good example on using the MessageGatewayService is found at http://labs.sixdimensions.com/blog/dklco/2012-08-20/sending-email-adobe-cq-api

      /Ove

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