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

What problem are you trying to solve by getting this path. I am trying to understand what value this  is within a web site.

Please check this out.

aem-core-wcm-components/ImageDelegateRenderCondition.java at master · Adobe-Marketing-Cloud/aem-core-wcm-components · Gi…

Ajax call in front end will be completely unware of component structure in AEM node.

You wil have to pass params.

One more, Even if you dont use params and  think of caching, Ideally your servlet response should not be cached else it will not execute again for another component.

Whats the use case?

The actual requirement is cache a servlet response, which is returned by a third party rest-api. The url for this rest-api is fetched from the dialog proeprties of the component 'comp1'.

So, I was hoping if I could get the path of the component instance under par from which the servlet invoked, I can directly fetch the dialog property using PropertyIterator without having to pass query params to the servlet. It would help me cache the response, provided I have an extension for the  servlet path. And when the author changes the URL in the dialog for that particular component and activates the page, the dispatcher might invalidate the cache and invoke the servlet again to fetch fresh response.

@edubey

Yes I totally agree with your point. This would be the next challenge. Any suggestions?

I have tried considering registering it with resourceTypes, selectors, extension and suffix. But I cannot bind the servlet to a single page resource as I would be using this servlet on multiple pages through various components serving the same purpose. Also, we cannot use wildcards to define a regex for the selector value while registering a servlet.

Alternatively I have also tried dispatcher level configurations such as ignoreUrlParams, Mod Rewrite Rules and resource mapping using etc/maps/http. It doesn't seem to work for my requirement.

Any suggestions?

I'm clearly going forward based on trial and error method.

Kindly correct me if my understanding is wrong.

Hi,

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

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

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

Hi Jorge,

Do you have any sample code for above approach?

Thanks,
Rajeev

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…