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user1576
Level 3
Oct 3, 2025 2:20 PM UTC
Solved

Can we extend AssetDuplicationDetector to send email instead of notification in case of duplicate images

  We have OOTB  feature to GET notification incase of duplicate Asset uploaded ,If we enable the  Asset duplicate detector configuration . Can we extend this com.adobe.cq.assetcompute.impl.assetprocessor.AssetDuplicationDetector class to send email instead of notification in AEM as cloud.  Please suggest solution for the same.

 

giuseppebaglio
giuseppebaglioAccepted solution
Level 10
Oct 3, 2025 3:10 PM UTC

hi @user1576,

I would try one of the following approaches: 

  • Event-driven via Adobe I/O Events for AEM Assets: Subscribe to assets events such as “asset ready” to receive payloads that include repository metadata like dam:sha1, then query AEM for assets with the same hash; if duplicates are found, send email via a service of choice. Reference: here

  • AEM-side listener after processing: Implement a listener that reacts once the asset state is processed (for example, checking jcr:content/dam:assetState), look up duplicates by dam:sha1, and send an email using the Day CQ Mail Service configuration.

To check for duplicates, you can use the SHA-1 fingerprint stored at jcr:content/metadata/dam:sha1. By querying other assets that share this SHA-1 value, you can identify potential duplicates regardless of their filename or path. In other words, you can run a query on the dam:Asset nodes where dam:sha1 matches the hash of the current asset. Any additional results returned by the query can be considered duplicates.

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2 replies

SantoshSai
Community Advisor
SantoshSaiCommunity Advisor
Community Advisor
Oct 3, 2025 2:34 PM UTC

Hi @user1576,

I think, you can’t directly extend or override com.adobe.cq.assetcompute.impl.assetprocessor.AssetDuplicationDetector in AEM as a Cloud Service, because:

  • It’s an internal OSGi implementation class managed by Adobe inside the Asset Compute pipeline.

  • In AEMaaCS, you don’t have control over modifying or subclassing these OOTB services.

That said, you can build a supported extension pattern:

  • You can register an OSGi EventHandler or Sling Job Consumer that listens for:

    • com.day.cq.dam.api.DamEvent.ASSET_DUPLICATE (event type fired on duplicate).

  • In your handler, trigger an Email Service (com.day.cq.mailer.DefaultMailService) to send an email.
    OR

  • Configure a custom workflow step after the duplication check in your asset ingestion workflow model.

  •  

  • In that step, use the Email Service to notify recipients with asset details.

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Santosh Sai
    giuseppebaglio
    giuseppebaglioAccepted solution
    Level 10
    Oct 3, 2025 3:10 PM UTC

    hi @user1576,

    I would try one of the following approaches: 

    • Event-driven via Adobe I/O Events for AEM Assets: Subscribe to assets events such as “asset ready” to receive payloads that include repository metadata like dam:sha1, then query AEM for assets with the same hash; if duplicates are found, send email via a service of choice. Reference: here

    • AEM-side listener after processing: Implement a listener that reacts once the asset state is processed (for example, checking jcr:content/dam:assetState), look up duplicates by dam:sha1, and send an email using the Day CQ Mail Service configuration.

    To check for duplicates, you can use the SHA-1 fingerprint stored at jcr:content/metadata/dam:sha1. By querying other assets that share this SHA-1 value, you can identify potential duplicates regardless of their filename or path. In other words, you can run a query on the dam:Asset nodes where dam:sha1 matches the hash of the current asset. Any additional results returned by the query can be considered duplicates.

    Translate
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