How do I fetch the number of versions present in an asset in AEM programmatically?

[KaibalyaJena_123]

Hi everyone,

I have a requirement to fetch the number of versions present in an Asset using a servlet.

Can anyone please provide some references?

Thanks in advance.

[iamnjain · Accepted solution]

Hello @KaibalyaJena_123 

As I understood your requirement, you need the number of versions created for a given asset.

You can use VersionHistory Interface to get all the versions and their details. Please refer below doc link for available methods.

https://developer.adobe.com/experience-manager/reference-materials/spec/jsr170/javadocs/jcr-2.0/java...


Do let me know if you face any issues or you have different requirement?
Hope it helps.

[aanchal-sikka]

Hello @KaibalyaJena_123 

     eg:
     AssetVersionManager versionManager = resolver.adaptTo(AssetVersionManager.class);

     // to get existing versions
     Iterator<AssetVersion> versions = versionManager.listVersions("/path/to/asset/document.pdf");
     ...

you can readily use the AssetVersionManager API.

- Get path of asset in servlet

- Get resourceResolver from Request

- Adapt to AssetVersionManager 

- List all versions of the related asset./

Details are available on https://developer.adobe.com/experience-manager/reference-materials/6-5/javadoc/com/adobe/granite/ass...

[Nishant-Singh]

If you want you use JCR API then below code snippet you can use -

final VersionManager versionManager = node.getSession().getWorkspace().getVersionManager();
final VersionHistory versionHistory = versionManager.getVersionHistory(node.getPath());
final VersionIterator versionIter = versionHistory.getAllVersions();

 if you want you use Resource API then you can use 

AssetVersionManager versionManager = resolver.adaptTo(AssetVersionManager.class);
Iterator<AssetVersion> versions = versionManager.listVersions("/content/dam/sample.jpg");