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bibingest.py
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bibingest.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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.
"""Ingestion utilities."""
__revision__ = "$Id$"
import os
from invenio.pluginutils import PluginContainer
from invenio.config import CFG_PYLIBDIR
from invenio.bibingest_config import \
CFG_BIBINGEST_COLLECTIONS, \
CFG_BIBINGEST_DEFAULT_COLLECTION_NAME, \
CFG_BIBINGEST_STORAGE_ENGINES_PATH, \
CFG_BIBINGEST_INGESTION_PACKAGES_PATH, \
CFG_BIBINGEST_ONE_STORAGE_ENGINE_INSTANCE_PER_STORAGE_ENGINE, \
CFG_BIBINGEST_ONE_INGESTION_PACKAGE_INSTANCE_PER_REQUEST
_STORAGE_ENGINES = PluginContainer(\
os.path.join(CFG_PYLIBDIR,
'invenio',
CFG_BIBINGEST_STORAGE_ENGINES_PATH,
'*.py'))
_INGESTION_PACKAGES = PluginContainer(\
os.path.join(CFG_PYLIBDIR,
'invenio',
CFG_BIBINGEST_INGESTION_PACKAGES_PATH,
'*.py'))
_collections = {}
# ****************
# Helper functions
# ****************
prepare_kwargs = lambda **kwargs:kwargs
# **************
# Main functions
# **************
def list(collection = None):
"""
Returns the list of available collections.
"""
if collection is not None:
return CFG_BIBINGEST_COLLECTIONS.get(collection)
return CFG_BIBINGEST_COLLECTIONS.keys()
def select(collection_name):
"""
Given a collection name, this function returns the ingestion package
instance which corresponds to it. CRUD functions can be then exectured
on that instance.
"""
if not _collections.has_key(collection_name):
collection_name = CFG_BIBINGEST_DEFAULT_COLLECTION_NAME
if CFG_BIBINGEST_ONE_INGESTION_PACKAGE_INSTANCE_PER_REQUEST:
if CFG_BIBINGEST_ONE_STORAGE_ENGINE_INSTANCE_PER_STORAGE_ENGINE:
ingestion_package_class, \
storage_engine_instance, \
storage_engine_settings = _collections.get(collection_name)
return ingestion_package_class(storage_engine_instance, storage_engine_settings)
else:
ingestion_package_class, \
storage_engine_instance, \
dummy = _collections.get(collection_name)
return ingestion_package_class(storage_engine_instance)
else:
if CFG_BIBINGEST_ONE_STORAGE_ENGINE_INSTANCE_PER_STORAGE_ENGINE:
ingestion_package_instance = _collections.get(collection_name)
ingestion_package_instance.reconfigure_storage_engine()
return ingestion_package_instance
else:
ingestion_package_instance = _collections.get(collection_name)
return ingestion_package_instance
def _start():
"""
Populates the private collections dictionary.
"""
# If we only have on instance per engine we need to temporarily store
# those instances in a dictionary as we create and reuse them.
if CFG_BIBINGEST_ONE_STORAGE_ENGINE_INSTANCE_PER_STORAGE_ENGINE:
storage_engines_instances = {}
for collection_name, collection_configuration in CFG_BIBINGEST_COLLECTIONS.iteritems():
# Storage engines
storage_engine_configuration = collection_configuration.get('storage_engine')
storage_engine_name = storage_engine_configuration.get('name')
storage_engine_settings = storage_engine_configuration.get('settings')
if CFG_BIBINGEST_ONE_STORAGE_ENGINE_INSTANCE_PER_STORAGE_ENGINE:
# One storage engine per storage engine.
# Since each collection might have different settings for the
# storage engine instance we only instanciate it here without
# passing any settings.
storage_engine_instance = \
storage_engines_instances.get(storage_engine_name)
if storage_engine_instance is None:
storage_engine_instance = \
_STORAGE_ENGINES.get(storage_engine_name)()
storage_engines_instances[storage_engine_name] = \
storage_engine_instance
else:
# One storage engine per collection.
# In this case we can instantiate the storage engine and pass
# its collection-specific settings at the same time.
storage_engine_instance = _STORAGE_ENGINES.get(storage_engine_name)(storage_engine_settings)
# Ingestion packages
ingestion_package_configuration = collection_configuration.get('ingestion_package')
ingestion_package_name = ingestion_package_configuration.get('name')
if CFG_BIBINGEST_ONE_INGESTION_PACKAGE_INSTANCE_PER_REQUEST:
ingestion_package_class = _INGESTION_PACKAGES.get(ingestion_package_name)
else:
if CFG_BIBINGEST_ONE_STORAGE_ENGINE_INSTANCE_PER_STORAGE_ENGINE:
ingestion_package_instance = _INGESTION_PACKAGES.get(ingestion_package_name)(storage_engine_instance,
storage_engine_settings)
else:
ingestion_package_instance = _INGESTION_PACKAGES.get(ingestion_package_name)(storage_engine_instance)
# Collections
if CFG_BIBINGEST_ONE_INGESTION_PACKAGE_INSTANCE_PER_REQUEST:
_collections[collection_name] = (ingestion_package_class, storage_engine_instance, storage_engine_settings)
else:
_collections[collection_name] = (ingestion_package_instance)
_start()

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