Reading arguments or a file from workflow dialog box

[Former Community Member]

Hi I'm a new developer to the AEM platform and i'm currently trying to create a custom process step which processes a text file (contains some file names) which will be uploaded to the workflow and then it finds those file names in a different folder of the DAM and does a different process with it.

Now my question is how would I read that txt file?

My guess is to use the resource factory?

private ResourceResolverFactory resourceResolverFactory;

ResourceResolver resolver=null;

resolver = resourceResolverFactory.getAdministrativeResourceResolver(null);

Resource res=null;
res= resolver.getResource("PATH");

Also can you guys let me know if this post is on the right track, it shows multiple methods but i strictly want a file being uploaded.

http://www.wemblog.com/2011/10/how-to-read-external-file-in-cq.html

Thanks,

Ram

[smacdonald2008]

I referenced an article on your other thread about how to upload a file and use AssetManager to place into the DAM. I have asked our Workflow expert to address your question on using Dialog boxes and getting values. 

[Will_McGauley · Accepted solution]

Hi Ram,

If you are using the Granite Workflow Process API as described here [0] you can get a ResourceResolver directly by adapting the WorkflowSession passed into your process step to a ResourceResolver.  like this:

ResourceResolver resolver = workflowSession.adaptTo(ResourceResolver.class);

You do not need to close this resolver, the workflow engine will take care of that for you.  Note you can also adapt a workflow session to a javax.jcr.Session.

I looked at the example you provided, and I didn't know you could adapt a resource to a java.io.File.  If you have trouble with that try the approach taken here [1] to read the binary value of the jcr:data property, it's probably the approach I would have taken.  Careful however, this example reads the entire file into a byte array in memory, which may not be the best approach for large files.

Hope this helps - good luck!

Will

[0] http://docs.adobe.com/docs/en/cq/current/workflows/wf-extending.html#Developing Process Step Implementations

[1] http://blogs.adobe.com/saket/readwrite-content-nodes-or-files-frominto-the-crx-repository-2/