Solved

Unsure of why a custom servlet is not being registered

Forum|Forum|3 years ago
January 18, 2023
5 replies
2099 views

Hello all,

I'm building out a custom servlet using the code found here: https://github.com/arunpatidar02/aem63app-repo/blob/master/java/SimpleGetGroup.java.

When I hit my localhost: localhost:4502/bin/get/groups, I receive this message: "Resource at '/bin/get/groups' not found: No resource found."

I noticed this line "LOG { 0 }: no servlet found" and I cannot find my servlet resolved under /system/console/configMgr or bundles or components. Testing under the Servlet Resolver Test with '/bin/get/groups' results in this as well: "The resource given by path '/bin/get/groups' does not exist. Therefore no resource type could be determined!"

I'm not sure what logs to check, error.log seems to be outputting the same info as well (I see "org.apache.sling.engine.imple.SlingRequestProcessImpl service: Resource /bin/get/groups not found."

Is there anything else I should check to see why my servlet's not resolving correctly? This is on an author instance as well.

Thank you!

This post is no longer active and is closed to new replies. Need help? Start a new post to ask your question.

Best answer by Kiran_Vedantam

Hi @grvybb

The issue I see is the methods::

SLING_SERVLET_METHODS + "=GET"

Your code doesn't have it and hence it's failing to bind.

Hope this helps!

Thanks,
Kiran Vedantam.

nitesh_kumar-1

Adobe Employee

Hi @grvybb ,

Check if your bundles are active, and also if you can find them under the list of Components in the OSGi console.

Also, check if your servlet is resolving http://localhost:4502/system/console/servletresolver

Ideally, you should register your servlets using resourceType, as it's recommended and registering through path has some caveats as mentioned here:

https://sling.apache.org/documentation/the-sling-engine/servlets.html#caveats-when-binding-servlets-by-path

An example is part of the standard archetype, you can also find it here:-

https://github.com/adobe/aem-project-archetype/blob/develop/src/main/archetype/core/src/main/java/core/servlets/SimpleServlet.java

Hope this helps!

Regards,

Nitesh

Manu_Mathew_

Community Advisor

@grvybb you can check if your servlet path is allowed here-

You can also

Go to felix console.
Go to Sling-> Sling Servlet Resolver

to check if the servlet is resolved or not.

if its path based you need to use the:

"sling.servlet.paths=" + "/bin/registeredbypathdemo"

and if its resource-based then use the:

"sling.servlet.resourceTypes="+ "sample/components/structure/page"

This could be your resource type- associate your servlet with a resource type and selector, which prevents unauthorized access.

Ravi_Joshi

Level 4

Hi @grvybb ,

I have used the same code and it seems working fine for me. Can you please check whether your servlet is in an active state or not? you can find your servlet in the OSGI container of the bundle details section as shown in the below image.