How to update asset programatically in AEM Assets?

arunaaems506124

01-07-2020

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!

 

Accepted Solutions (1)

Accepted Solutions (1)

Albin_Issac

MVP

01-07-2020

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

 

aem-assets-http-api.png

 

aem-assets-http-api.png

aem-assets-http-api.png

Regards

Albin I

www.albinsblog.com

Answers (4)

Answers (4)

Veena_Vikram

MVP

01-07-2020

@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 @rajas66269496  mentioned, but check line 346 , you can clearly see that line actually updates an existing asset.

 

 

 

 

//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

Employee

03-07-2020

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 !!

Nupur_Jain

MVP

01-07-2020

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