javajcrjackrabbitjackrabbit-oak

How can I access a JCR Version of a deleted node?

I'd like to access the javax.jcr.version.VersionHistory of a node that has been deleted to read metadata and change labels, or possibly restore it. How can I do that? The JCR VersionManager provides methods getBaseVersion(java.lang.String absPath) and getVersionHistory(java.lang.String absPath) that throw a PathNotFoundException when the node at absPath has been deleted, although the data is still around in the /jcr:system/jcr:versionStorage .

I'm using jackrabbit-oak 1.6.1, in case that's relevant. Thank you very much!

Solution

  • After the versioned node is deleted, revision data is still there in /jcr:system/jcr:versionStorage, if you have enough info about the node, you can search for its versions, nt:frozenNode nodes -

    --jcr sql2
SELECT * FROM [nt:frozenNode] as n WHERE ISDESCENDANTNODE ([/jcr:system/jcr:versionStorage]) and n.[jcr:title] LIKE "name%"

    version node can be cast to javax.jcr.version.Version;

    Version version = (Version) frozenNode.getParent();

    and restored using VersionManager.restore() -

    VersionManager versionManager = session.getWorkspace().getVersionManager();
versionManager.restore(path, version, true);