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Clive_Stewart
Level 6
Oct 16, 2015 2:26 AM UTC
Solved

Programatically working with the DAM

Hi I have 2  questions around programatically.

 

1) I need to save files to the DAM.

 

I can save jpg files using the  code

 

public  String ToDam(InputStream is, String fileName, javax.jcr.Session session, String damLocation, String fileType,String addOrRemove) {
        try {
            javax.jcr.Node node = session.getNode(damLocation);
            javax.jcr.ValueFactory valueFactory = session.getValueFactory();
            javax.jcr.Binary contentValue = valueFactory.createBinary(is);
            javax.jcr.Node fileNode = node.addNode(fileName, "nt:file");
            fileNode.addMixin("mix:referenceable");
            javax.jcr.Node resNode = fileNode.addNode("jcr:content",
                    "nt:resource");
            if (addOrRemove.equals("add")) {
                resNode.setProperty("jcr:mimeType","image/jpeg");
                resNode.setProperty("jcr:data", contentValue);
            } else {
             //TODO
            }
            Calendar lastModified = Calendar.getInstance();
            lastModified.setTimeInMillis(lastModified.getTimeInMillis());
            resNode.setProperty("jcr:lastModified", lastModified);

            // Return the path to the document that was stored in CQ.
            System.out.println(fileNode.getPath());
            return fileNode.getPath();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

 

 

I have tried to save XML files using the above code with one change

 resNode.setProperty("jcr:mimeType","XML");

 

The code runs, but i cannot locate the xml file in the CQ5 DAM http://localhost:4502/damadmin#/content/dam.

 

2) how does one delete files from a DAM node in Java.

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    Lokesh_Shivalingaiah
    Lokesh_ShivalingaiahAccepted solution
    Level 10
    Oct 16, 2015 2:26 AM UTC

    Hi Clive,

    Use the AssetManager API to work with DAM instead of directly dealing with the JCR Nodes.

    1. To create a DAM resource

        com.day.cq.dam.api.AssetManager assetMgr = resourceResolver.adaptTo(com.day.cq.dam.api.AssetManager.class);

        assetMgr.createAsset(<attachmentPath>, <input stream>,<contentType>, true);

        for XML files, contentype = 'application/xml'

     

    2. To delete the DAM resource

        com.adobe.granite.asset.api.AssetManager assetApiMgr = resourceResolver.adaptTo(com.adobe.granite.asset.api.AssetManager.class);

        assetApiMgr.removeAsset(<asset path>);

    View reply

    8 replies

    nikhilkkumar
    Level 2
    Oct 4, 2019 12:06 PM UTC

    Following is the solution for getting data from DAM and writing the Data.

    https://aemsimplifiedbynikhil.wordpress.com/2019/10/04/read-write-data-in-json-file-of-dam-in-aem-making-rest-api-call/

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    vikramca06
    vikramca06
    Level 4
    Oct 16, 2015 2:26 AM UTC

    Hi,

    Add session.save() next to  resNode.setProperty("jcr:lastModified", lastModified); line and to delete fileNode.remove().

    Thanks.

    Vikram

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    Sam205505050
    Level 6
    Oct 16, 2015 2:26 AM UTC

    Pls mention proper mimetype:  resNode.setProperty("jcr:mimeType","application/xml"); 

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    smacdonald2008
    smacdonald2008
    Level 10
    Oct 16, 2015 2:26 AM UTC

    Here is a community article that talks about How To develop a Java client app that can upload multiple files to the AEM DAM. The use of the AssetManager is also in this article. The client developed is:

    [img]MultipleSwingClient.png[/img]

    Notice that each file that is uploaded is displayed in the client. 

    AEM applies different renditions to the digital assets:

    [img]DAMRen.png[/img]

    All assets are stored in the DAM:

    [img]DamFiles.png[/img]

    Here is the article:

    http://helpx.adobe.com/experience-manager/using/multiple-digital-assets.html

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    Ove_Lindström
    Level 6
    Oct 16, 2015 2:26 AM UTC

    I think I would preffer to use the Asset class to do a lot of this stuff instead of manipulating the different nodes.

    Or even the AssetHanlder http://dev.day.com/docs/en/cq/current/javadoc/com/day/cq/dam/api/handler/AssetHandler.html

    /Ove

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    Lokesh_Shivalingaiah
    Lokesh_ShivalingaiahAccepted solution
    Level 10
    Oct 16, 2015 2:26 AM UTC

    Hi Clive,

    Use the AssetManager API to work with DAM instead of directly dealing with the JCR Nodes.

    1. To create a DAM resource

        com.day.cq.dam.api.AssetManager assetMgr = resourceResolver.adaptTo(com.day.cq.dam.api.AssetManager.class);

        assetMgr.createAsset(<attachmentPath>, <input stream>,<contentType>, true);

        for XML files, contentype = 'application/xml'

     

    2. To delete the DAM resource

        com.adobe.granite.asset.api.AssetManager assetApiMgr = resourceResolver.adaptTo(com.adobe.granite.asset.api.AssetManager.class);

        assetApiMgr.removeAsset(<asset path>);

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      Clive_StewartAuthor
      Level 6
      Oct 16, 2015 2:26 AM UTC

      Thank you

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      smacdonald2008
      smacdonald2008
      Level 10
      Oct 16, 2015 2:26 AM UTC

      For anyone reading this thread and wanting to perform this use case, see this AEM community article that talks about how to use the AssetManager API to programmatically upload files to the AEM DAM:

      Uploading files to Adobe Experience Manager DAM using AssetManager API

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