def remove_machine_state(self, machine_id):
"""Remove machine state identified by `machine_id` if present.
Returns True if machine state was actually removed.
"""
internal_id = "machine-%010d" % machine_id
must_delete = [False]
def remove_machine(topology):
# Removing a non-existing machine again won't fail, since
# the end intention is preserved. This makes dealing
# with concurrency easier.
if topology.has_machine(internal_id):
if topology.machine_has_units(internal_id):
raise MachineStateInUse(machine_id)
topology.remove_machine(internal_id)
must_delete[0] = True
else:
must_delete[0] = False
yield self._retry_topology_change(remove_machine)
if must_delete[0]:
# If the process is interrupted here, this node will stay
# around, but it's not a big deal since it's not being
# referenced by the topology anymore.
yield remove_tree(self._client, "/machines/%s" % (internal_id,))
returnValue(must_delete[0])
def remove_machine_state(self, machine_id):
"""Remove machine state identified by `machine_id` if present.
Returns True if machine state was actually removed.
"""
internal_id = "machine-%010d" % machine_id
must_delete = [False]
def remove_machine(topology):
# Removing a non-existing machine again won't fail, since
# the end intention is preserved. This makes dealing
# with concurrency easier.
if topology.has_machine(internal_id):
if topology.machine_has_units(internal_id):
raise MachineStateInUse(machine_id)
topology.remove_machine(internal_id)
must_delete[0] = True
else:
must_delete[0] = False
yield self._retry_topology_change(remove_machine)
if must_delete[0]:
# If the process is interrupted here, this node will stay
# around, but it's not a big deal since it's not being
# referenced by the topology anymore.
yield remove_tree(self._client, "/machines/%s" % (internal_id, ))
returnValue(must_delete[0])
def test_remove_tree(self):
yield self.client.create("/zoo")
yield self.client.create("/zoo/mammals")
yield self.client.create("/zoo/mammals/elephant")
yield self.client.create("/zoo/reptiles")
yield self.client.create("/zoo/reptiles/snake")
yield remove_tree(self.client, "/zoo")
children = yield self.client.get_children("/")
self.assertNotIn("zoo", children)
def test_remove_tree(self):
yield self.client.create("/zoo")
yield self.client.create("/zoo/mammals")
yield self.client.create("/zoo/mammals/elephant")
yield self.client.create("/zoo/reptiles")
yield self.client.create("/zoo/reptiles/snake")
yield remove_tree(self.client, "/zoo")
children = yield self.client.get_children("/")
self.assertNotIn("zoo", children)
def tearDown(self):
exists = yield self.client.exists(self.path)
if exists:
yield remove_tree(self.client, self.path)
def tearDown(self):
exists = yield self.client.exists(self.path)
if exists:
yield remove_tree(self.client, self.path)
