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#
# Copyright (C) 2006-2009 Nexedi SA
#
# 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.
from neo import protocol
from neo.storage.handlers import BaseClientAndStorageOperationHandler
class StorageOperationHandler(BaseClientAndStorageOperationHandler):
def handleAskLastIDs(self, conn, packet):
app = self.app
oid = app.dm.getLastOID()
tid = app.dm.getLastTID()
p = protocol.answerLastIDs(oid, tid, app.pt.getID())
conn.answer(p, packet.getId())
def handleAskOIDs(self, conn, packet, first, last, partition):
# This method is complicated, because I must return OIDs only
# about usable partitions assigned to me.
if first >= last:
raise protocol.ProtocolError('invalid offsets')
app = self.app
if partition == protocol.INVALID_PARTITION:
# Collect all usable partitions for me.
getCellList = app.pt.getCellList
partition_list = []
for offset in xrange(app.pt.getPartitions()):
for cell in getCellList(offset, readable=True):
if cell.getUUID() == app.uuid:
partition_list.append(offset)
break
else:
partition_list = [partition]
oid_list = app.dm.getOIDList(first, last - first,
app.pt.getPartitions(), partition_list)
conn.answer(protocol.answerOIDs(oid_list), packet.getId())