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# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
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# contributor license agreements. See the NOTICE file distributed with |
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# this work for additional information regarding copyright ownership. |
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# The ASF licenses this file to You under the Apache License, Version 2.0 |
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# (the "License"); you may not use this file except in compliance with |
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# the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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""" |
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Stream WSGI application. |
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This application listens for events on the RabbitMQ message bus and delivers them to all the |
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clients which are connected to the stream HTTP endpoint (fan out approach). |
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Note: This app doesn't need access to MongoDB, just RabbitMQ. |
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""" |
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import os |
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import pecan |
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from oslo_config import cfg |
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from st2stream import config as st2stream_config |
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from st2common import hooks |
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from st2common import log as logging |
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from st2common.constants.system import VERSION_STRING |
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from st2common.service_setup import setup as common_setup |
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LOG = logging.getLogger(__name__) |
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BASE_DIR = os.path.dirname(os.path.abspath(__file__)) |
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def _get_pecan_config(): |
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config = { |
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'app': { |
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'root': 'st2stream.controllers.root.RootController', |
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'modules': ['st2auth'], |
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'debug': cfg.CONF.stream.debug, |
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'errors': {'__force_dict__': True}, |
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'guess_content_type_from_ext': False |
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} |
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} |
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return pecan.configuration.conf_from_dict(config) |
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def setup_app(config=None): |
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LOG.info('Creating st2stream: %s as Pecan app.', VERSION_STRING) |
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is_gunicorn = getattr(config, 'is_gunicorn', False) |
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if is_gunicorn: |
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st2stream_config.register_opts() |
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# This should be called in gunicorn case because we only want |
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# workers to connect to db, rabbbitmq etc. In standalone HTTP |
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# server case, this setup would have already occurred. |
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common_setup(service='stream', config=st2stream_config, setup_db=True, |
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register_mq_exchanges=True, |
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register_signal_handlers=True, |
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register_internal_trigger_types=False, |
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run_migrations=False, |
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config_args=config.config_args) |
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if not config: |
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# standalone HTTP server case |
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config = _get_pecan_config() |
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else: |
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# gunicorn case |
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if is_gunicorn: |
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config.app = _get_pecan_config().app |
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app_conf = dict(config.app) |
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active_hooks = [hooks.RequestIDHook(), hooks.JSONErrorResponseHook(), |
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hooks.LoggingHook()] |
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if cfg.CONF.auth.enable: |
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active_hooks.append(hooks.AuthHook()) |
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active_hooks.append(hooks.CorsHook()) |
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app = pecan.make_app(app_conf.pop('root'), |
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logging=getattr(config, 'logging', {}), |
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hooks=active_hooks, |
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**app_conf |
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) |
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LOG.info('%s app created.' % __name__) |
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return app |
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StackStorm /
st2
