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#!/usr/bin/env python
""" Async index service for the Datastore.
Subscribes to the create/update/delete messages of the Datastore and
performs the indexing. When this service is enabled the Datastore
access the Xapian repository in read only mode.
"""
try: from ore.main import Application
except ImportError: Application = object
from olpc.datastore.datastore import DS_SERVICE, DS_OBJECT_PATH
from olpc.datastore.datastore import DS_DBUS_INTERFACE
from olpc.datastore.indexer import Indexer
import dbus
import dbus.mainloop.glib
import logging
import sys
import os
import signal
profile = os.environ.get('SUGAR_PROFILE', 'default')
base_dir = os.path.join(os.path.expanduser('~'), '.sugar', profile)
repo_dir = os.path.join(base_dir, 'datastore')
fulltext_dir = os.path.join(repo_dir, 'fulltext')
log_dir = os.path.join(base_dir, "logs")
if not os.path.exists(log_dir): os.makedirs(log_dir)
os.chdir(repo_dir)
# setup logger
filename = None
if not sys.stdin.isatty():
filename = os.path.join(log_dir, "indexer.log")
logging.basicConfig(level=logging.DEBUG,
format="%(asctime)-15s %(levelname)s: %(message)s",
filename = filename,
)
logger = logging.getLogger('org.laptop.sugar.Indexer')
logger.setLevel(logging.DEBUG)
class IndexService(Application):
def manage_options(self):
self.parser.add_option("--olpc.fulltext.repo",
dest="fulltext_dir",
action="store", default='fulltext',
help="""Location of the FullText Repository""")
def main(self):
logging.debug('Starting the index service at %s' % self.options.fulltext_dir)
dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
bus = dbus.SessionBus()
self.fulltext = Indexer(self.options.fulltext_dir)
self.fulltext.use_fulltext = True
ds = bus.get_object(DS_SERVICE, DS_OBJECT_PATH)
self.ds = dbus.Interface(ds, dbus_interface=DS_DBUS_INTERFACE)
self.ds.connect_to_signal("Created", self.created,
dbus_interface=DS_DBUS_INTERFACE)
self.ds.connect_to_signal("Updated", self.updated,
dbus_interface=DS_DBUS_INTERFACE)
self.ds.connect_to_signal("Deleted", self.deleted,
dbus_interface=DS_DBUS_INTERFACE)
self.ds.connect_to_signal("Stopped", self.stopped,
dbus_interface=DS_DBUS_INTERFACE)
self.eventloop.run()
def get_textprops(self, uid):
# text properties also get full text indexing
# currently this is still searched with the 'fulltext'
# parameter of find()
textprops = {}
for k,v in self.ds.get_properties(uid, dict(type='text')).items():
textprops[str(k)] = v and str(v) or ''
return textprops
def created(self, uid):
"""An object was created on the bus and we want to index it"""
# because the file isn't encoded anywhere accessible in the
# create call we must actually get the filename and trigger
# the indexing on that
filename = self.ds.get_filename(uid)
r = None
if filename:
mime_type = self.ds.get_properties(uid, {}).get('mime_type', None)
r = self.fulltext.fulltext_index(uid, filename, mime_type,
self.get_textprops(uid))
if r is True:
logger.debug("index creation of %s" % uid)
elif r is False:
logger.debug("unable to index creation of %s" % uid)
else:
logger.debug("nothing to index on creation of %s" % uid)
def updated(self, uid):
"""An object was updated on the bus and we want to index it"""
# because the file isn't encoded anywhere accessible in the
# create call we must actually get the filename and trigger
# the indexing on that
filename = self.ds.get_filename(uid)
r = None
if filename:
mime_type = self.ds.get_properties(uid, {}).get('mime_type',
None)
r = self.fulltext.fulltext_index(uid, filename, mime_type,
self.get_textprops(uid))
if r is True:
logger.debug("index update of %s" % uid)
elif r is False:
logger.debug("unable to index update of %s" % uid)
else:
logger.debug("nothing to index on update of %s" % uid)
def deleted(self, uid):
"""An object was updated on the bus and we want to index it"""
# because the file isn't encoded anywhere accessible in the
# create call we must actually get the filename and trigger
# the indexing on that
try:
self.fulltext.fulltext_unindex(uid)
logger.debug("unindex deletion of %s" % uid);
except KeyError: pass
def stopped(self):
"""Respond to the datastore being stopped by shutting down
ourselves"""
self.fulltext.stop()
self.eventloop.quit()
if __name__ == "__main__":
def handle_shutdown(signum, frame):
idx.stopped()
print "shutdown cleanly"
raise SystemExit("Shutting down on signal %s" % signum)
signal.signal(signal.SIGHUP, handle_shutdown)
signal.signal(signal.SIGTERM, handle_shutdown)
idx = IndexService()
#idx()
# w/o ore.main
import gobject
idx.eventloop = gobject.MainLoop()
class options(object): pass
o = options()
o.fulltext_dir = 'fulltext'
idx.options = o
try:
idx.main()
except:
# force logging this one
logger.setLevel(logging.DEBUG)
logger.debug("Problem in index service",
exc_info=sys.exc_info())
idx.stopped()
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