Metadata-Version: 1.0
Name: zc.catalog
Version: 1.2b
Summary: zc.catalog contains a number of extensions to the Zope 3 catalog
Home-page: http://svn.zope.org/zc.catalog
Author: Zope Project
Author-email: zope3-dev@zope.org
License: ZPL
Description: ==========
        zc.catalog
        ==========
        
        zc.catalog is an extension to the Zope 3 catalog, Zope 3's indexing
        and search facility. zc.catalog contains a number of extensions to the
        Zope 3 catalog, such as some new indexes, improved globbing and
        stemming support, and an alternative catalog implementation.
        
        ==================
        zc.catalog changes
        ==================
        
        The 1.2 line supports Zope 3.4/ZODB 3.8.  The 1.1 line supports Zope
        3.3/ZODB 3.7.
        
        1.2dev
        ======
        
        Features added
        --------------
        
        * zc.catalog now can use 64-bit BTrees ("L") as provided by ZODB 3.8.
        
        * Albertas Agejavas (alga@pov.lt) included the new CallableWrapper, for
        when the typical Zope 3 index-by-adapter story
        (zope.app.catalog.attribute) is unnecessary trouble, and you just want
        to use a callable.  See callablewrapper.txt.  This can also be used for
        other indexes based on the zope.index interfaces.
        
        * Extents now have a __len__.  The current implementation defers to the
        standard BTree len implementation, and shares its performance
        characteristics: it needs to wake up all of the buckets, but if all of the
        buckets are awake it is a fairly quick operation.
        
        * A simple ISelfPoulatingExtent was added to the extentcatalog module for
        which populating is a no-op.  This is directly useful for catalogs that
        are used as implementation details of a component, in which objects are
        indexed explicitly by your own calls rather than by the usual subscribers.
        It is also potentially slightly useful as a base for other self-populating
        extents.
        
        1.1.1 (2007-3-17)
        =================
        
        Bugs fixed
        ----------
        
        'all_of' would return all results when one of the values had no results.
        Reported, with test and fix provided, by Nando Quintana.
        
        1.1 (2007-1-6)
        ================
        
        Features removed
        ----------------
        
        The queueing of events in the extent catalog has been entirely removed.
        Subtransactions caused significant problems to the code introduced in 1.0.
        Other solutions also have significant problems, and the win of this kind
        of queueing is qustionable.  Here is a run down of the approaches rejected
        for getting the queueing to work:
        
        * _p_invalidate (used in 1.0).  Not really designed for use within a
        transaction, and reverts to last savepoint, rather than the beginning of
        the transaction.  Could monkeypatch savepoints to iterate over
        precommit transaction hooks but that just smells too bad.
        
        * _p_resolveConflict.  Requires application software to exist in ZEO and
        even ZRS installations, which is counter to our software deployment goals.
        Also causes useless repeated writes of empty queue to database, but that's
        not the showstopper.
        
        * vague hand-wavy ideas for separate storages or transaction managers for the
        queue.  Never panned out in discussion.
        
        1.0 (2007-1-5)
        ==============
        
        Bugs fixed
        ----------
        
        * adjusted extentcatalog tests to trigger (and discuss and test) the queueing
        behavior.
        
        * fixed problem with excessive conflict errors due to queueing code.
        
        * updated stemming to work with newest version of TextIndexNG's extensions.
        
        * omitted stemming test when TextIndexNG's extensions are unavailable, so
        tests pass without it.  Since TextIndexNG's extensions are optional, this
        seems reasonable.
        
        * removed use of zapi in extentcatalog.
        
        0.2 (2006-11-22)
        ================
        
        Features added
        --------------
        
        * First release on Cheeseshop.
        
Keywords: zope zope3 indexing
Platform: UNKNOWN
Classifier: Framework :: Zope3
