Check if a DAV-Request has a Label in the header, before checking if it's
version-controlled
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Key: JCR-3004
URL: https://issues.apache.org/jira/browse/JCR-3004
Project: Jackrabbit Content Repository
Issue Type: Improvement
Components: jackrabbit-jcr-server
Affects Versions: 2.2.7, 2.3.0
Reporter: Christian Stocker
Attachments: patch_commit_85c91801358a.patch
When looking at our MySQL logs, I realized that jackrabbit on each DAV Request
calls the VERSION table every time I get a new node (which is not cached yet),
even if I only do a simple getNode.
As a versioning table can get pretty large, this may have a performance impact.
I found out, that DavResourceFactoryImpl checks, if a node is versioned to
decide, if we have to check for the Label header to later check out another
version for the GET request. I re-ordered those checks now so that it first
checks, if there's an http Label-header and only then checks, if the node is
versioned. The check for a Label header should be much faster than checking a
DB, if it's versioned (and scale much better, too)
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