How to create sling events for specific templates in aem? | Adobe Higher Education
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Mario248
Mario248
Level 7
February 5, 2024
解決済み

How to create sling events for specific templates in aem?

  • February 5, 2024
  • 2 の返信
  • 1645 ビュー
I want to make an external call whenever the page is published and I don't want to do this for all pages. Only certain pages I want to do this call. For example for the page is created with /conf/abc/template template.(cq:template = /conf/abc/template)
 
Could anyone tell me what sling event API to use for this requirement ?
 
このトピックへの返信は締め切られました。
ベストアンサー Kamal_Kishor

@mario248 : Every template has a resource type, I believe you can make use of that instead of template name. Also, you can use this in combination with path as well.

@Component(service = EventHandler.class, immediate = true, property = { Constants.SERVICE_DESCRIPTION + "=Event Handler ", EventConstants.EVENT_TOPIC + "="+ReplicationAction.Event_Topic, EventConstants.EVENT_FILTER + "= ((path=/content/your-site/*)(resourceType=myapp/components/page/your-page-component))" })

You can refer this :- https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/event-filter-is-not-working/m-p/374198

https://techagyan.blogspot.com/2015/02/aem-event-handling-and-filtering.html

 

thanks.

 

2 の返信

iamnjain
Community Advisor
iamnjainCommunity Advisor
Community Advisor
February 5, 2024

Hi @mario248 

 

You can use ResourceChangeListener class to handle sling level events and below is the sample code and you can customize it according to your business logic.

import org.apache.sling.api.resource.observation.ResourceChange; import org.apache.sling.api.resource.observation.ResourceChangeListener; import org.osgi.service.component.annotations.Component; @Component(service = ResourceChangeListener.class, property = { "sling.resourceType=/conf/abc/temp1", // Target the specific template "path=/content/(.*)" // Observe page creation under content }) public class PageCreationEventHandler implements ResourceChangeListener { @Override public void onChange(ResourceChange change) { if (change.getType() == ResourceChange.Type.ADDED) { // Page has been created String pagePath = change.getPath(); // Your custom logic here System.out.println("Page created: " + pagePath); // Example: Send a notification, perform additional processing, etc. } } }


Hope it helps. 🙂

    Mario248
    Mario248作成者
    Level 7
    February 5, 2024

    Thanks for your response. You are using ResourceChangeListener over sling events. Is there any preference and suggestion?

      joerghoh
      Adobe Employee
      joerghohAdobe Employee
      Adobe Employee
      February 11, 2024

      The ResourceChangeListener is the recommended approach, as sending all repository changes as OSGI events is not scalable enough. Also you need to handle all requests, you cannot limit your listener be called only for a certain path(s).

        Kamal_Kishor
        Community Advisor
        Kamal_KishorCommunity Advisor回答
        Community Advisor
        February 5, 2024

        @mario248 : Every template has a resource type, I believe you can make use of that instead of template name. Also, you can use this in combination with path as well.

        @Component(service = EventHandler.class, immediate = true, property = { Constants.SERVICE_DESCRIPTION + "=Event Handler ", EventConstants.EVENT_TOPIC + "="+ReplicationAction.Event_Topic, EventConstants.EVENT_FILTER + "= ((path=/content/your-site/*)(resourceType=myapp/components/page/your-page-component))" })

        You can refer this :- https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/event-filter-is-not-working/m-p/374198

        https://techagyan.blogspot.com/2015/02/aem-event-handling-and-filtering.html

         

        thanks.

         

          Mario248
          Mario248作成者
          Level 7
          February 5, 2024

          Thank for your reply. For some reason the sling resource type is common for other pages hence I have to reply on cq:template property hence I tried below code but it is not working. any reason ?

           

          @Component(service = EventHandler.class, immediate = true, property = {
              Constants.SERVICE_DESCRIPTION + "=Event Handler ",
              EventConstants.EVENT_TOPIC + "="+ReplicationAction.EVENT_TOPIC,
              EventConstants.EVENT_FILTER + "= ((cq:template=/conf/abc/template))" })
            Kamal_Kishor
            Community Advisor
            Kamal_KishorCommunity Advisor
            Community Advisor
            February 6, 2024

            @mario248 : In that case, you will have to create an EventHandler at a path level to reduce triggering of it everywhere and then in handleEvent method you can apply the filter based on cq:template property.

            @Override public void handleEvent(Event event) { ReplicationAction replicationAction = ReplicationAction.fromEvent(event); String pagePath = replicationAction.getPath(); //read the jcr:content/cq:template property value and check if it matches with your template. based on the match you can take action. }
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