Stefan Egli created OAK-5021:
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             Summary: Improve observation of files
                 Key: OAK-5021
                 URL: https://issues.apache.org/jira/browse/OAK-5021
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: jcr
    Affects Versions: 1.5.12
            Reporter: Stefan Egli
            Assignee: Stefan Egli


(Originally reported as JCR-4046, but moved to Oak as a result of introducing 
the OakEventFilter in OAK-5013. From the original description: )

A file in JCR is represented by at least two nodes, the nt:file node and a 
child node named jcr:content holding the contents of the file (and metadata).
This has the consequence that if the contents of a file changes, a change event 
of the jcr:content node is reported - but not of the nt:file node.
This makes creating listeners listening for changes in files complicated, as 
you can't use the file name to filter  - especially with glob patterns (see 
JCR-4044 - now OAK-5019) this becomes troublesome.
In addition, whenever you get a change for a jcr:content node, you have to 
check if the parent is a nt:file node and decide based on the result.
It would be great to have a flag on the JackrabbitEventFilter to enable smarter 
reporting just for nt:files: if a property on jcr:content is changed, a change 
to the nt:file node is reported.
See also SLING-6163 and OAK-4940

/cc [~cziegeler]



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