How to update asset programatically in AEM Assets?

[arunaaems506124]

Hi All,

I am using createAsset Api to create asset in asset server.If I want to  update asset content (I am uplaoding pdfs) file is not updating. How to achieve file update with assetmanager API.

Any help much appreaciated.

AssetManager manager = resourceResolver.adaptTo(AssetManager.class);

Asset createAsset(String path,
                InputStream is,
                String mimeType,
                boolean doSave)

Thanks!

[raj_mandalapu]

The below article gives you clear information on how to create Asset and updating the Asset.

https://github.com/Adobe-Consulting-Services/acs-aem-commons/blob/master/bundle/src/main/java/com/ad...

In the above github codebase, check "saveMigrationInfo" method to update asset

[viruh15818023]

Can I use the Asset HTTP API to link "Related" assets?

More details on Related Asset:
https://experienceleague.adobe.com/docs/experience-manager-65/assets/managing/related-assets.html?la...

Technically, 

Related assets Admin UI, creates node "related" next to "metadata" when you link using asset admin UI. 

I tried sending following JSON with Update Asset Metadata API Call, I'm getting 403 status code.

{"class":"asset","properties":{"metadata":{"cq:tags":["keywords:Cambridge"]},"related":{"others":{"sling:members":["/content/dam/test/files/test.pdf"]}}}}

How to update the "related asset?".

Thank you!

[Albin_Issac · Accepted solution]

You can also use the ASSETS HTTP API directly to update the asset meta data

e.g 

URL - http://localhost:4502/api/assets/test/test-api.pdf   (test is the parent folder under /content/dam)

Method - PUT

Content-Type - application/json

Sample Payload - {"properties":{"metadata":{"jcr:description":"test3","jcr:title":"test 2"}}}

Add the Basic authentication details 

Reference - https://docs.adobe.com/content/help/en/experience-manager-65/assets/extending/mac-api-assets.html

Sample request through postman

Regards

Albin I

www.albinsblog.com

[srojesh]

Hi,

Can Asset API be used with more secured method like Outh2.0?  

[Nupur_Jain]

Hi @arunaaems506124 

If I am able to understand correctly, you want to replace the existing PDF file with new PDF file OR you want to update metadata like tags, title etc?

Thanks,

Nupur

[arunaaems506124]

Yes Nupur I want to update the asset after I upload using assetManager.createassset method. as per the documentation it was told that we can user createassset method but it is not helping. I have trouble in getting the binary.

[arunaaems506124]

Your understanding is correct. Please help me how to achieve this without deleting exisitng asset how can I update with API

[arunaaems506124]

Yes Nupur I want to update the asset after I upload using assetManager.createassset method. as per the documentation it was told that we can user createassset method but it is not helping. I have trouble in getting the binary.

[VeenaVikraman]

@arunaaems506124 There is no separate method for updating an asset, it is basically the same createAsset Method which you use to update the existing asset. If you read the java docs more clearly you can read the below

createAsset

Asset createAsset(String path,
                InputStream is,
                String mimeType,
                boolean doSave)

Creates a new Asset at the given path. If an asset already exists at the given path, its original rendition is updated instead of creating a new asset. If inputStream is null new Asset is created without original rendition. If an asset already exists at given path and inputstream is null, original rendition is not updated.

Said that, for a sample code, please take a look at the codebase @raj_mandalapu  mentioned, but check line 346 , you can clearly see that line actually updates an existing asset.

https://github.com/Adobe-Consulting-Services/acs-aem-commons/blob/master/bundle/src/main/java/com/ad...

//if skip then we only create asset if it doesn't exist
                if (r.getResource(assetPath) == null) {
                    createAsset(source, assetPath, r, false);
                } 

Hope this helps

Veena ✌

[sunjot16]

You can use the Asset Interface to achieve the same.

     // to create an asset
     AssetManager assetManager = resolver.adaptTo(AssetManager.class);
     Asset newAsset = assetManager.createAsset("/path/to/asset/document.pdf");

The following docs may be helpful:

https://helpx.adobe.com/experience-manager/6-4/sites/developing/using/reference-materials/javadoc/co...

https://helpx.adobe.com/experience-manager/6-4/sites/developing/using/reference-materials/javadoc/co...

The latter one states: 

Creates a new Asset at the given path. If an asset already exists at the given path, its original rendition is updated instead of creating a new asset. If inputStream is null new Asset is created without original rendition. If an asset already exists at given path and inputstream is null, original rendition is not updated.

I think that your Input Stream is null, due to which the original rendition is not getting updated.

Input Stream is the input stream of the new asset's original binary.

You can also achieve the same using Assets HTTP API, as follows:

https://docs.adobe.com/content/help/en/experience-manager-65/assets/extending/mac-api-assets.html#cr...

https://docs.adobe.com/content/help/en/experience-manager-65/assets/extending/mac-api-assets.html#up...

Hope these help !!

[arunaaems506124]

@sunjot16, thank you for your reply. my input stream is not null. how to get the asset binary can you please suggest some methods. I am reading like this fileInputStream = new FileInputStream(file.getPath());