def modify_state(self, modifier_callable, *args, **kwargs):
"""
see :meth:`otter.models.interface.IScalingGroup.modify_state`
"""
def _write_state(new_state):
assert (new_state.tenant_id == self.tenant_id and
new_state.group_id == self.uuid)
params = {
'tenantId': new_state.tenant_id,
'groupId': new_state.group_id,
'active': serialize_json_data(new_state.active, 1),
'pending': serialize_json_data(new_state.pending, 1),
'paused': new_state.paused,
'groupTouched': new_state.group_touched,
'policyTouched': serialize_json_data(new_state.policy_touched, 1)
}
return self.connection.execute(_cql_update_group_state, params,
get_consistency_level('update', 'state'))
def _modify_state():
d = self.view_state()
d.addCallback(lambda state: modifier_callable(self, state, *args, **kwargs))
return d.addCallback(_write_state)
lock = BasicLock(self.connection, LOCK_TABLE_NAME, self.uuid)
return with_lock(lock, _modify_state)
def modify_state(self, modifier_callable, *args, **kwargs):
"""
see :meth:`otter.models.interface.IScalingGroup.modify_state`
"""
log = self.log.bind(system='CassScalingGroup.modify_state')
def _write_state(new_state):
assert (new_state.tenant_id == self.tenant_id and
new_state.group_id == self.uuid)
params = {
'tenantId': new_state.tenant_id,
'groupId': new_state.group_id,
'active': serialize_json_data(new_state.active, 1),
'pending': serialize_json_data(new_state.pending, 1),
'paused': new_state.paused,
'groupTouched': new_state.group_touched,
'policyTouched': serialize_json_data(new_state.policy_touched, 1)
}
return self.connection.execute(_cql_insert_group_state.format(cf=self.group_table),
params, get_consistency_level('update', 'state'))
def _modify_state():
d = self.view_state()
d.addCallback(lambda state: modifier_callable(self, state, *args, **kwargs))
return d.addCallback(_write_state)
lock = BasicLock(self.connection, LOCK_TABLE_NAME, self.uuid,
max_retry=5, retry_wait=random.uniform(3, 5),
log=log.bind(category='locking'))
return with_lock(lock, _modify_state)
def _do_check():
d = with_lock(self.lock, self.fetch_and_process, batchsize)
d.addCallback(check_for_more)
d.addErrback(ignore_and_log, BusyLockError, self.log,
"Couldn't get lock to process events")
d.addErrback(self.log.err)
return d
def modify_state(self, modifier_callable, *args, **kwargs):
"""
see :meth:`otter.models.interface.IScalingGroup.modify_state`
"""
def _write_state(new_state):
assert (new_state.tenant_id == self.tenant_id
and new_state.group_id == self.uuid)
params = {
'tenantId': new_state.tenant_id,
'groupId': new_state.group_id,
'active': serialize_json_data(new_state.active, 1),
'pending': serialize_json_data(new_state.pending, 1),
'paused': new_state.paused,
'groupTouched': new_state.group_touched,
'policyTouched': serialize_json_data(new_state.policy_touched,
1)
}
return self.connection.execute(
_cql_insert_group_state.format(cf=self.group_table), params,
get_consistency_level('update', 'state'))
def _modify_state():
d = self.view_state()
d.addCallback(
lambda state: modifier_callable(self, state, *args, **kwargs))
return d.addCallback(_write_state)
lock = BasicLock(self.connection,
LOCK_TABLE_NAME,
self.uuid,
max_retry=5,
retry_wait=random.uniform(3, 5))
return with_lock(lock, _modify_state)
def _do_check():
lock_log = self.log.bind(category='locking')
lock = BasicLock(self.slv_client, self.lock_table, 'schedule', max_retry=0,
log=lock_log)
d = with_lock(lock, self.fetch_and_process, batchsize)
d.addCallback(check_for_more)
d.addErrback(ignore_and_log, BusyLockError, lock_log,
"Couldn't get lock to process events")
d.addErrback(self.log.err)
return d
def test_with_lock(self):
"""
Acquire the lock, run the function, and release the lock.
"""
lock_uuid = uuid.uuid1()
def _func():
return defer.succeed('Success')
lock = self.BasicLock(None, 'lock', lock_uuid)
d = with_lock(lock, _func)
result = self.successResultOf(d)
self.assertEqual(result, 'Success')
self.lock.acquire.assert_called_once_with()
self.lock.release.assert_called_once_with()
def test_with_lock(self):
"""
Acquire the lock, run the function, and release the lock.
"""
lock_uuid = uuid.uuid1()
def _func():
return defer.succeed('Success')
lock = self.BasicLock(None, 'lock', lock_uuid)
d = with_lock(lock, _func)
result = self.successResultOf(d)
self.assertEqual(result, 'Success')
self.lock.acquire.assert_called_once_with()
self.lock.release.assert_called_once_with()
def delete_group(self):
"""
see :meth:`otter.models.interface.IScalingGroup.delete_group`
"""
log = self.log.bind(system='CassScalingGroup.delete_group')
# Events can only be deleted by policy id, since that and trigger are
# the only parts of the compound key
def _delete_everything(policies):
params = {
'tenantId': self.tenant_id,
'groupId': self.uuid
}
queries = [
_cql_delete_all_in_group.format(cf=table) for table in
(self.group_table, self.policies_table, self.webhooks_table)]
if len(policies) > 0:
events_query, events_params = _delete_many_query_and_params(
self.event_table, '"policyId"', [p['id'] for p in policies])
queries.append(events_query)
params.update(events_params)
b = Batch(queries, params,
consistency=get_consistency_level('delete', 'group'))
return b.execute(self.connection)
def _maybe_delete(state):
if len(state.active) + len(state.pending) > 0:
raise GroupNotEmptyError(self.tenant_id, self.uuid)
d = self._naive_list_policies()
d.addCallback(_delete_everything)
return d
def _delete_group():
d = self.view_state()
d.addCallback(_maybe_delete)
return d
lock = BasicLock(self.connection, LOCK_TABLE_NAME, self.uuid,
max_retry=5, retry_wait=random.uniform(3, 5),
log=log.bind(category='locking'))
return with_lock(lock, _delete_group)
def delete_group(self):
"""
see :meth:`otter.models.interface.IScalingGroup.delete_group`
"""
# Events can only be deleted by policy id, since that and trigger are
# the only parts of the compound key
def _delete_everything(policies):
params = {'tenantId': self.tenant_id, 'groupId': self.uuid}
queries = [
_cql_delete_all_in_group.format(cf=table)
for table in (self.group_table, self.policies_table,
self.webhooks_table)
]
if len(policies) > 0:
events_query, events_params = _delete_many_query_and_params(
self.event_table, '"policyId"', policies.keys())
queries.append(events_query)
params.update(events_params)
b = Batch(queries,
params,
consistency=get_consistency_level('delete', 'group'))
return b.execute(self.connection)
def _maybe_delete(state):
if len(state.active) + len(state.pending) > 0:
raise GroupNotEmptyError(self.tenant_id, self.uuid)
d = self._naive_list_policies()
d.addCallback(_delete_everything)
return d
def _delete_group():
d = self.view_state()
d.addCallback(_maybe_delete)
return d
lock = BasicLock(self.connection,
LOCK_TABLE_NAME,
self.uuid,
max_retry=5,
retry_wait=random.uniform(3, 5))
return with_lock(lock, _delete_group)
def test_with_lock_func_errors(self):
"""
If the func raises an error, the lock is released and the error passsed on.
"""
lock_uuid = uuid.uuid1()
def _func():
return defer.fail(TypeError('The samoflange is broken.'))
lock = self.BasicLock(None, 'lock', lock_uuid)
d = with_lock(lock, _func)
result = self.failureResultOf(d)
self.assertTrue(result.check(TypeError))
self.assertEqual(result.getErrorMessage(), 'The samoflange is broken.')
self.lock.acquire.assert_called_once_with()
self.lock.release.assert_called_once_with()
def test_with_lock_func_errors(self):
"""
If the func raises an error, the lock is released and the error passsed on.
"""
lock_uuid = uuid.uuid1()
def _func():
return defer.fail(TypeError('The samoflange is broken.'))
lock = self.BasicLock(None, 'lock', lock_uuid)
d = with_lock(lock, _func)
result = self.failureResultOf(d)
self.assertTrue(result.check(TypeError))
self.assertEqual(result.getErrorMessage(), 'The samoflange is broken.')
self.lock.acquire.assert_called_once_with()
self.lock.release.assert_called_once_with()
def delete_group(self):
"""
see :meth:`otter.models.interface.IScalingGroup.delete_group`
"""
# Events can only be deleted by policy id, since that and trigger are
# the only parts of the compound key
def _delete_everything(policies):
params = {
'tenantId': self.tenant_id,
'groupId': self.uuid
}
queries = [
_cql_delete_all_in_group.format(cf=table) for table in
(self.config_table, self.launch_table, self.policies_table,
self.webhooks_table, self.state_table)]
if len(policies) > 0:
events_query, events_params = _delete_events_query_and_params(
policies.keys(), self.event_table)
queries.append(events_query.rstrip(';'))
params.update(events_params)
b = Batch(queries, params,
consistency=get_consistency_level('delete', 'group'))
return b.execute(self.connection)
def _maybe_delete(state):
if len(state.active) + len(state.pending) > 0:
raise GroupNotEmptyError(self.tenant_id, self.uuid)
d = self._naive_list_policies()
d.addCallback(_delete_everything)
return d
def _delete_group():
d = self.view_state()
d.addCallback(_maybe_delete)
return d
lock = BasicLock(self.connection, LOCK_TABLE_NAME, self.uuid)
return with_lock(lock, _delete_group)
def test_with_lock_not_acquired(self):
"""
Raise an error if the lock isn't acquired.
"""
def _side_effect(*args, **kwargs):
return defer.fail(BusyLockError('', ''))
self.lock.acquire.side_effect = _side_effect
lock_uuid = uuid.uuid1()
called = [False]
def _func():
called[0] = True
return defer.succeed(None)
lock = self.BasicLock(None, 'lock', lock_uuid)
d = with_lock(lock, _func)
result = self.failureResultOf(d)
self.assertTrue(result.check(BusyLockError))
self.assertFalse(called[0])
self.assertEqual(self.lock.release.call_count, 0)
def test_with_lock_not_acquired(self):
"""
Raise an error if the lock isn't acquired.
"""
def _side_effect(*args, **kwargs):
return defer.fail(BusyLockError('', ''))
self.lock.acquire.side_effect = _side_effect
lock_uuid = uuid.uuid1()
called = [False]
def _func():
called[0] = True
return defer.succeed(None)
lock = self.BasicLock(None, 'lock', lock_uuid)
d = with_lock(lock, _func)
result = self.failureResultOf(d)
self.assertTrue(result.check(BusyLockError))
self.assertFalse(called[0])
self.assertEqual(self.lock.release.call_count, 0)
