RETIRED, Function as a Service for OpenStack
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# Copyright 2017 Catalyst IT Limited
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from oslo_log import log as logging
from oslo_serialization import jsonutils
from qinling.db import api as db_api
from qinling.db.sqlalchemy import models
from qinling import exceptions as exc
from qinling import status
from qinling.utils import constants
LOG = logging.getLogger(__name__)
def _update_function_db(function_id, pre_count):
# Function update is done using UPDATE ... FROM ... WHERE
# non-locking clause.
while True:
modified = db_api.conditional_update(
models.Function,
{
'count': pre_count + 1,
},
{
'id': function_id,
'count': pre_count
},
insecure=True,
)
if not modified:
LOG.warning("Retrying to update function count.")
pre_count += 1
continue
else:
break
def _update_function_version_db(version_id, pre_count):
# Update is done using UPDATE ... FROM ... WHERE non-locking clause.
while True:
modified = db_api.conditional_update(
models.FunctionVersion,
{
'count': pre_count + 1,
},
{
'id': version_id,
'count': pre_count
},
insecure=True,
)
if not modified:
LOG.warning("Retrying to update function version count.")
pre_count += 1
continue
else:
break
def create_execution(engine_client, params):
function_alias = params.get('function_alias')
function_id = params.get('function_id')
version = params.get('function_version', 0)
is_sync = params.get('sync', True)
input = params.get('input')
if function_alias:
alias_db = db_api.get_function_alias(function_alias)
function_id = alias_db.function_id
version = alias_db.function_version
params.update({'function_id': function_id,
'version': version})
func_db = db_api.get_function(function_id)
runtime_id = func_db.runtime_id
# Image type function does not need runtime
if runtime_id:
runtime_db = db_api.get_runtime(runtime_id)
if runtime_db and runtime_db.status != status.AVAILABLE:
raise exc.RuntimeNotAvailableException(
'Runtime %s is not available.' % func_db.runtime_id
)
if version > 0:
if func_db.code['source'] != constants.PACKAGE_FUNCTION:
raise exc.InputException(
"Can not specify version for %s type function." %
constants.PACKAGE_FUNCTION
)
# update version count
version_db = db_api.get_function_version(function_id, version)
pre_version_count = version_db.count
_update_function_version_db(version_db.id, pre_version_count)
else:
pre_count = func_db.count
_update_function_db(function_id, pre_count)
# input in params should be a string.
if input:
try:
function_input = jsonutils.loads(input)
# If input is e.g. '6', result of jsonutils.loads is 6 which can
# not be stored in db.
if type(function_input) == int:
raise ValueError
params['input'] = function_input
except ValueError:
params['input'] = {'__function_input': input}
params.update({'status': status.RUNNING})
db_model = db_api.create_execution(params)
try:
engine_client.create_execution(
db_model.id, function_id, version, runtime_id,
input=params.get('input'), is_sync=is_sync
)
except exc.QinlingException:
# Catch RPC errors for executions:
# - for RemoteError in an RPC call, the execution status would be
# handled in the engine side;
# - for other exceptions in an RPC call or cast, the execution status
# would remain RUNNING so we should update it.
db_model = db_api.get_execution(db_model.id)
if db_model.status == status.RUNNING:
db_model = db_api.update_execution(db_model.id,
{'status': status.ERROR})
return db_model
if is_sync:
# The execution should already be updated by engine service for sync
# execution.
db_model = db_api.get_execution(db_model.id)
return db_model