JCR EventAdmin bridge (JcrResourceListener) is loosing event information
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Key: SLING-2277
URL: https://issues.apache.org/jira/browse/SLING-2277
Project: Sling
Issue Type: Bug
Components: JCR
Affects Versions: JCR Resource 2.0.10
Reporter: Felix Meschberger
Assignee: Felix Meschberger
The JcrResourceListener translates JCR Observation events into general OSGi
EventAdmin events. By this translation JCR Property level events are collated
into JCR Node level events thus potentially loosing important information.
In the concrete situation, the JCR Resource MapEntries class handles events to
update the resolver mappings for vanity paths (sling:vanityPath property). The
current implementation works well with adding or changing these properties
since the actual resource is loaded and checked. If the property is removed,
though, it of course does not exist any longer and thus the check fails and the
mapping is not updated.
In addition to just collating property level events into node level events the
affected properties and operations should be kept. This can be done as simple
as adding a String[] property to the OSGi Event.Each entry in the array is an
event indicator character plus the full path to the affected property. The
event character is '+' for added, '-' for removed, and '~' for modified. This
allows for conveying the information as well as event filtering.
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