@Reference EmailService emailService throwing null

[#1]

Requirement:- send email upon form submission.
Below is my class. I am getting null pointer exception when i print the emailService. Can anyone help me out please.

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.osgi.service.component.annotations.Component;

import org.osgi.service.component.annotations.Reference;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.adobe.acs.commons.email.EmailService;

Arun Patidar​smacdonald2008​

@Component(immediate = true, service = ContactEmailService.class)

public class ContactEmailService {

@Reference

private EmailService mailService;

Logger logger = LoggerFactory.getLogger(this.getClass());

EmailDetails details = new EmailDetails(); //bean class

private Map<String, String> emailParams = new HashMap<>();

public void sendEmail() {

logger.info("email service"+mailService); // prints null

details.setTemplatePath("/etc/notification/email/kohler/contact_email.txt");

emailParams.put("body", "hello there");

emailParams.put("senderEmailAddress", "abcd@example.com");

emailParams.put("senderName", "David Smith");

details.setEmailParams(emailParams);

String[] recipients = { "test@gmail.com", "sample@example.com" };

details.setRecipients(recipients);

List<String> failureList = mailService.sendEmail(details.getTemplatePath(), details.getEmailParams(),details.getRecipients()); //throws null pointer exception

logger.info(""+failureList.size());

if (failureList.isEmpty()) {

logger.info("successfully sent");

} else {

logger.info("failed to deliver");

}

}

}

[#2]

My bad I created object to call sendemail()

After lot of trial and error
I replaced below

ContactEmailService obj = new ContactEmailService();

obj.sendEmail();

with

@Reference

private ContactEmailService contactEmailService;

contactEmailService.sendEmail();

I was able to get the instance of the emailService