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R3600/invenio/modules/indexer/cache.py
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cache.py
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# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2014, 2015 CERN.
#
# Invenio is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# Invenio is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Invenio; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""Implementation of indexer caches."""
from invenio.legacy.miscutil.data_cacher import DataCacher, DataCacherProxy
from .models import IdxINDEX
class IndexStemmingDataCacher(DataCacher):
"""Provide cache for stemming information for word/phrase indexes.
This class is not to be used directly; use function
get_index_stemming_language() instead.
"""
def __init__(self):
def cache_filler():
return dict(IdxINDEX.query.values(IdxINDEX.id,
IdxINDEX.stemming_language))
def timestamp_verifier():
from invenio.legacy.dbquery import get_table_update_time
return get_table_update_time('idxINDEX')
DataCacher.__init__(self, cache_filler, timestamp_verifier)
index_stemming_cache = DataCacherProxy(IndexStemmingDataCacher)
def get_index_stemming_language(index_id, recreate_cache_if_needed=True):
"""Return stemming langugage for given index."""
if recreate_cache_if_needed:
index_stemming_cache.recreate_cache_if_needed()
return index_stemming_cache.cache[index_id]
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