Jackrabbit Team locking access control (jaas) use jdbc as an alternative to virtual filesystem persistence layer use an alternative journaling filesystem as (transactional) persistence layer provide clean abstraction for persistence grouping (nodes & properties that should be stored/loaded together in the persistence layer); (e.g. properties are stored within .node.xml) need a more efficient way to persistently remove state of items in transient attic (nodes in transient attic are orphaned, i.e. they are disconnected from the hierarchy and can thus not be easily identified on Node#save): => need a hierarchical cache index for items in the transient attic (see TransientItemStateManager), sparse tree index?; this index needs to be maintained/updated on every transient & persistent hierarchy operation (move, remove, copy) HierarchyManager: cache Path objects (key: ItemId, value: Path[]); update cache on hierarchy changes (move, hardlink, remove, etc) inline @todo comments: resolve/implement javaDoc, javaDoc, javaDoc logging: use commons logging instead of log4j logging: remove unnecessary output, check log categories/verbosity, use 'debug' whenever possible