By pass event handler from a service impl

Forum|Forum|2 years ago
March 14, 2024
6 replies
1159 views

Hi Team,

I have implemented a event handler which executes on replication of page . Now I want event handler to be excluded for one specific use case while i am publishing the page.

How to implement this?

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Best answer by BrianKasingli

Let's say your event hander has is replicating a node. You have added a custom property named "excludeEventHandler". Now if you have this property that exists, do not replicate, and run custom code.

Example Code:

    
    public void handleEvent(Event event) {
        String path = (String) event.getProperty("path");
        try (ResourceResolver resourceResolver = resolver) {
            Resource resource = resourceResolver.getResource(path);
            if (resource != null) {
                Node node = resource.adaptTo(Node.class);
                if (node != null && !node.hasProperty("excludeEventHandler")) {
                    // Your custom logic here
                    System.out.println("Handling event for: " + path);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

kautuk_sahni

Employee

@sateeshkreddy Did you find the suggestions from users helpful? Please let us know if more information is required. Otherwise, please mark the answer as correct for posterity. If you have found out solution yourself, please share it with the community.

Kautuk Sahni

joerghoh

Employee

The OSGI event which is sent by the replication cannot be customized in a way, that you can provide a flag to the replication call, which then shows up in the event properties. Never heard of such a requirement before.

That means you need to place the logic in the event handler.

BrianKasingliAccepted solution

New Participant

Let's say your event hander has is replicating a node. You have added a custom property named "excludeEventHandler". Now if you have this property that exists, do not replicate, and run custom code.

Example Code:

    
    public void handleEvent(Event event) {
        String path = (String) event.getProperty("path");
        try (ResourceResolver resourceResolver = resolver) {
            Resource resource = resourceResolver.getResource(path);
            if (resource != null) {
                Node node = resource.adaptTo(Node.class);
                if (node != null && !node.hasProperty("excludeEventHandler")) {
                    // Your custom logic here
                    System.out.println("Handling event for: " + path);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

M

Mahesh_Gunaje

New Participant

Hi @sateeshkreddy

If you want to execute only for few page paths, try to use this logic.

import org.osgi.service.event.EventHandler;

@Component(service = EventHandler.class,
        immediate = true,
        property = {
                EventConstants.EVENT_FILTER + "=(|(paths=/content/abc/articles/*)(paths=/content/xyz/books/*))",
                EventConstants.EVENT_TOPIC + "=" + ReplicationAction.EVENT_TOPIC,
        })
public class CustomReplicationEventHandler implements EventHandler {

So that your CustomReplicationEventHandler is called only for pages, which are part of EventConstants.EVENT_FILTER