AEM6.4 @Reference not working in SlingServlet

[pradeepdubey82]

Hi  All,

My sling servlet is not working as soon as i add

@Reference in it, otherwise it works fine

Below is the servlet code, i have create custom configuration as per the AEM6.4 standards(one @Interface class, one Interface class, one Impl class with proper annotations(org.osgi.service.component.annotations))

@Component(service = Servlet.class,

property = { Constants.SERVICE_DESCRIPTION + "=Simple Demo Servlet",

"sling.servlet.methods=" + HttpConstants.METHOD_GET,

"sling.servlet.paths=" + "/bin/testservlet" }

)

public class TestServlet extends SlingAllMethodsServlet {

  private static final long serialVersionUID = 1L;

  @Reference

  MySimpleService mySimpleService;

  private static final Logger logger =

  LoggerFactory.getLogger(TestServlet.class);

  @Override

  protected void doGet(final SlingHttpServletRequest req, final

  SlingHttpServletResponse resp) throws ServletException, IOException {

  logger.info("Inside doGet!!!");

  try {

  logger.info("Name ::: "+mySimpleService.getMyName());

  resp.getWriter().write(mySimpleService.getMyName()); }

  catch(Exception ex) {

  logger.error("Error in  doGet ::: ", ex);

  }

  }

}

Please advise, any help is highly appreciated.

Thanks,

Pradeep

[arunpatidar]

Hi @SanketJa1 
Please check the imports 

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

[pradeepdubey82]

I finally solved this, though it was very weird, first we have to save the configuration then servlet will become in  'satisfied' state.

Once servlet is in satisfied state we can call the same in url.

Thanks everyone for helping me on this.

Regards,

Pradeep

[arunpatidar]

The reason is your not setting default value of configuration and service returning null.

You can use the configuration like I mentioned to set default value of property and servlet will work without saving osgi value.

example code I posted in last comment.

[pradeepdubey82]

I had set default value(i have  shared all my code in post), still i have to open the configuration and save once to bring servlet in satisfied state.

[arunpatidar]

Hi,

you were using below which was returning null

@AttributeDefinition(name = "Test Namel", defaultValue="Pradeep", description = "Read my name")

    String name();

But I changed your config class like below, I was getting results

@AttributeDefinition(

        name = "Test Name",

        description = "Read my Name",

       type = AttributeType.STRING

    )

String getName() default "Pradeep";