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From "Sascha Homeier (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CMIS-1074) getContentStream returns null for renditions if link cache is cold
Date Fri, 12 Apr 2019 03:49:00 GMT
Sascha Homeier created CMIS-1074:
------------------------------------

             Summary: getContentStream returns null for renditions if link cache is cold
                 Key: CMIS-1074
                 URL: https://issues.apache.org/jira/browse/CMIS-1074
             Project: Chemistry
          Issue Type: Bug
          Components: opencmis-client
    Affects Versions: OpenCMIS 1.0.0
            Reporter: Sascha Homeier


A direct request for a rendition stream returns null:
{code}
ContentStream contentStream = cmisSession.getContentStream(objectId, originalId, null, null);
// contentStream is null here 
{code}

Used binding: AtomPub

I am not sure if I understand the AtomPub binding with its links well enough but for me it
seems the link cache is cold and the client wants to heat it up by getting the main document.
This is done by getting the object by id with rendition filter "cmis:none". I guess this rendition
filter is the reason there is no "alternate" link found in link cache which could be used
to actually request the content stream.

If you heat up the cache manually by getting the main document including renditions first
it works:
{code}
OperationContext opCtx = OperationContextUtils.createMinimumOperationContext();
opCtx.setRenditionFilterString("*");
ObjectId objectId = cmisSession.createObjectId(coid);
Document document = (Document) cmisSession.getObject(objectId, opCtx);
ContentStream contentStream = cmisSession.getContentStream(objectId, originalId, null, null);
{code}

Also getting the contentStream via document object works:
{code}
OperationContext opCtx = OperationContextUtils.createMinimumOperationContext();
opCtx.setRenditionFilterString("*");
ObjectId objectId = cmisSession.createObjectId(coid);
Document document = (Document) cmisSession.getObject(objectId, opCtx);
ContentStream contentStream = document.getContentStream(originalId);
{code}



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