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DB-API in-memory replacement for DictionaryDB

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This commit is contained in:
Doug Blank 2016-04-15 09:46:45 -04:00
parent 684788f2fd
commit 91ab6e80ca
2 changed files with 101 additions and 0 deletions
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33
gramps/plugins/database/inmemorydb.gpr.py Normal file
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#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2016 Douglas Blank <doug.blank@gmail.com>
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
register(DATABASE,
id = 'inmemorydb',
name = _("In-Memory Database Backend"),
name_accell = _("In-_Memory Database Backend"),
description = _("In-Memory Database Backend"),
version = '1.0.0',
gramps_target_version = "5.0",
status = STABLE,
fname = 'inmemorydb.py',
databaseclass = 'InMemoryDB',
authors=['Doug Blank'],
authors_email=["doug.blank@gmail.com"],
)

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gramps/plugins/database/inmemorydb.py Normal file
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#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2016 Douglas S. Blank <doug.blank@gmail.com>
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
from dbapi import DBAPI
from dbapi_support.sqlite import Sqlite
from gramps.gen.db.generic import DbGeneric, DBBACKEND, LOG
import os
class InMemoryDB(DBAPI):
"""
A DB-API 2.0 In-memory SQL database.
"""
def initialize_backend(self, directory):
"""
Create an in-memory sqlite database.
"""
self.dbapi = Sqlite(":memory:")
self.update_schema()
def write_version(self, directory):
"""Write files for a newly created DB."""
versionpath = os.path.join(directory, str(DBBACKEND))
LOG.debug("Write database backend file to 'inmemorydb'")
with open(versionpath, "w") as version_file:
version_file.write("inmemorydb")
def load(self, directory, callback=None, mode=None,
force_schema_upgrade=False,
force_bsddb_upgrade=False,
force_bsddb_downgrade=False,
force_python_upgrade=False):
DbGeneric.load(self, directory,
callback,
mode,
force_schema_upgrade,
force_bsddb_upgrade,
force_bsddb_downgrade,
force_python_upgrade)
# Dictionary-specific load:
from gramps.plugins.importer.importxml import importData
from gramps.cli.user import User
if self._directory:
backups = list(reversed(glob.glob(os.path.join(
self._directory, "backup-*.gramps"))))
if backups:
filename = backups[0]
if os.path.isfile(filename):
importData(self, filename, User())
self.reindex_reference_map(lambda progress: None)
self.rebuild_secondary(lambda progress: None)