How to get the path of the component instance under a page, that's invoking a servlet?

Hey Scott,

This works very nicely. I have tested this code snippet and this works!! Below is the screenshot.

Thanks,

Ratna Kumar.

Thanks Scott & Jorge..

This code sample is really helpful.

Result of an AJAX CALL -

Joerg is correct - although the Sling Servlet docs say both ways are supported - Apache Sling :: Servlets and Scripts - Reg by Resource type is better practice.

When you build a Maven 13 archetype, it builds a servlet that is OOTB bound to the page that is created. For example - in a package named com.aem.community.core.servlets you will find  SimpleServlet.

For example- see this (I added "sling.servlet.selectors=" + "groups") :

@Component(service=Servlet.class,

           property={

                   Constants.SERVICE_DESCRIPTION + "=Simple Demo Servlet",

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

                   "sling.servlet.resourceTypes="+ "AEMMaven13/components/structure/page",

                   "sling.servlet.selectors=" + "groups"

           })

public class SimpleServlet extends SlingSafeMethodsServlet {

    private static final long serialVersionUid = 1L;

    @Override

    protected void doGet(final SlingHttpServletRequest req,

            final SlingHttpServletResponse resp) throws ServletException, IOException {

        final Resource resource = req.getResource();

        resp.setContentType("text/plain");

        resp.getWriter().write("COOL Title = " + resource.adaptTo(ValueMap.class).get("jcr:title"));

This is bound too this page:

Now you can call this Servlet by using this URL:

http://localhost:4502/content/AEMMaven13/en.groups.html

And you can use this same URL to invoke this SERVLET via an AJAX CALL (that is called when a button is clicked for example):

$(document).ready(function() {

    $('body').hide().fadeIn(5000);

$('#submit').click(function() {

    var failure = function(err) {

             alert("Unable to retrive data "+err);

   };

   var claimId = 0;

    //Use JQuery AJAX request to post data to a Sling Servlet

    $.ajax({

         type: 'GET',   

         url:'http://localhost:4502/content/AEMMaven13/en.groups.html',

         success: function(msg){

           var myMsg = msg;

            alert(myMsg);

         }

     });

  });

}); // end ready

see [1] for an example where the selector "tagwidget" is bound to all resource types; you might want to be more specific with the resource type.

[1] acs-aem-commons/TagWidgetConfigurationServlet.java at 763d2968169be1d86937bc1f4354cf2f8e201866 · Adobe-Consulting-Servic…

Hi Jorge,

Do you have any sample code for above approach?

Thanks,
Rajeev

There is a way to achieve this by making call to Sling servlet (which is registered via resourcesType="componentPath") using java and get component path using request.getResource().getPath()

But this required credential to make a succesful request in Author, I think you can do it without credential(Authentication) in the Publish instance.

I don't know if this is feasible or not from your end but I am able to do it in my local instance.

Below is JS file which making kind a ajax call from component

// Server-side JavaScript for the ajax call

use(function () {

    var curRes = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()+resource.getPath();

    var getVar = new Packages.org.apache.commons.httpclient.methods.GetMethod(curRes);

    var client = new Packages.org.apache.commons.httpclient.HttpClient();

   // Authentication part

    var creds = new Packages.org.apache.commons.httpclient.UsernamePasswordCredentials("admin", "admin");

     client.getParams().setAuthenticationPreemptive(true);

    client.getState().setCredentials(org.apache.commons.httpclient.auth.AuthScope.ANY, creds);

   // Authentication part end

    client.executeMethod(getVar);

});

Thanks

Arun Patidar

That will give you path to page - then you still need to figure out which component on the page sent the AJAX request.

Hi,

You can register your servlet using resourceType and can get component path in your servlet using :