deb-mistral/mistral/utils/javascript.py
Renat Akhmerov da7798b0f5 Fix config import in javascript action module
Before this fix we couldn't individually run a number of unit tests
from IDE because this module was importing configuration from
oslo directly w/o giving a chance to load all needed config options
defined in mistral/config.py

Change-Id: Id538d773e1e3052d6fd7478e1baf5039be4d1a9a
2016-11-21 15:53:41 +07:00

70 lines
2.0 KiB
Python

# Copyright 2015 - Mirantis, Inc.
#
# 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.
import abc
import json
from oslo_utils import importutils
from mistral import config as cfg
from mistral import exceptions as exc
_PYV8 = importutils.try_import('PyV8')
_V8EVAL = importutils.try_import('v8eval')
class JSEvaluator(object):
@classmethod
@abc.abstractmethod
def evaluate(cls, script, context):
"""Executes given JavaScript."""
pass
class PyV8Evaluator(JSEvaluator):
@classmethod
def evaluate(cls, script, context):
if not _PYV8:
raise exc.MistralException(
"PyV8 module is not available. Please install PyV8."
)
with _PYV8.JSContext() as ctx:
# Prepare data context and way for interaction with it.
ctx.eval('$ = %s' % json.dumps(context))
result = ctx.eval(script)
return _PYV8.convert(result)
class V8EvalEvaluator(JSEvaluator):
@classmethod
def evaluate(cls, script, context):
if not _V8EVAL:
raise exc.MistralException(
"v8eval module is not available. Please install v8eval."
)
v8 = _V8EVAL.V8()
return v8.eval(('$ = %s; %s' % (json.dumps(context), script)).encode(
encoding='UTF-8'))
EVALUATOR = (V8EvalEvaluator if cfg.CONF.js_implementation == 'v8eval'
else PyV8Evaluator)
def evaluate(script, context):
return EVALUATOR.evaluate(script, context)