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Diffstat (limited to 'charms/trusty/cassandra/hooks/coordinator.py')
| -rw-r--r-- | charms/trusty/cassandra/hooks/coordinator.py | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/charms/trusty/cassandra/hooks/coordinator.py b/charms/trusty/cassandra/hooks/coordinator.py deleted file mode 100644 index c353671..0000000 --- a/charms/trusty/cassandra/hooks/coordinator.py +++ /dev/null @@ -1,35 +0,0 @@ -# Copyright 2015 Canonical Ltd. -# -# This file is part of the Cassandra Charm for Juju. -# -# This program is free software: you can redistribute it and/or modify -# it under the terms of the GNU General Public License version 3, as -# published by the Free Software Foundation. -# -# This program is distributed in the hope that it will be useful, but -# WITHOUT ANY WARRANTY; without even the implied warranties of -# MERCHANTABILITY, SATISFACTORY QUALITY, 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, see <http://www.gnu.org/licenses/>. -from charmhelpers.coordinator import BaseCoordinator - - -class CassandraCoordinator(BaseCoordinator): - def default_grant(self, lock, unit, granted, queue): - '''Grant locks to only one unit at a time, regardless of its name. - - This lets us keep separate locks like repair and restart, - while ensuring the operations do not occur on different nodes - at the same time. - ''' - # Return True if this unit has already been granted a lock. - if self.grants.get(unit): - return True - - # Otherwise, return True if the unit is first in the queue. - return queue[0] == unit and not granted - - -coordinator = CassandraCoordinator() |