def __init__(self, pack, file_path, class_name, trigger_types,
                 poll_interval=None, parent_args=None):
        """
        :param pack: Name of the pack this sensor belongs to.
        :type pack: ``str``

        :param file_path: Path to the sensor module file.
        :type file_path: ``str``

        :param class_name: Sensor class name.
        :type class_name: ``str``

        :param trigger_types: A list of references to trigger types which
                                  belong to this sensor.
        :type trigger_types: ``list`` of ``str``

        :param poll_interval: Sensor poll interval (in seconds).
        :type poll_interval: ``int`` or ``None``

        :param parent_args: Command line arguments passed to the parent process.
        :type parse_args: ``list``
        """
        self._pack = pack
        self._file_path = file_path
        self._class_name = class_name
        self._trigger_types = trigger_types or []
        self._poll_interval = poll_interval
        self._parent_args = parent_args or []
        self._trigger_names = {}

        # 1. Parse the config with inherited parent args
        try:
            config.parse_args(args=self._parent_args)
        except Exception:
            pass

        # 2. Establish DB connection
        username = cfg.CONF.database.username if hasattr(cfg.CONF.database, 'username') else None
        password = cfg.CONF.database.password if hasattr(cfg.CONF.database, 'password') else None
        db_setup_with_retry(cfg.CONF.database.db_name, cfg.CONF.database.host,
                            cfg.CONF.database.port, username=username, password=password)

        # 3. Instantiate the watcher
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types,
                                               queue_suffix='sensorwrapper_%s_%s' %
                                               (self._pack, self._class_name),
                                               exclusive=True)

        # 4. Set up logging
        self._logger = logging.getLogger('SensorWrapper.%s.%s' %
                                         (self._pack, self._class_name))
        logging.setup(cfg.CONF.sensorcontainer.logging)

        if '--debug' in parent_args:
            set_log_level_for_all_loggers()

        self._sensor_instance = self._get_sensor_instance()

 def __init__(self, local_timezone=None):
     self._timezone = local_timezone
     self._scheduler = BlockingScheduler(timezone=self._timezone)
     self._jobs = {}
     self._trigger_types = TIMER_TRIGGER_TYPES.keys()
     self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                            update_handler=self._handle_update_trigger,
                                            delete_handler=self._handle_delete_trigger,
                                            trigger_types=self._trigger_types,
                                            queue_suffix='timers')
     self._trigger_dispatcher = TriggerDispatcher(LOG)

 def __init__(self, local_timezone=None):
     self._timezone = local_timezone
     self._scheduler = BlockingScheduler(timezone=self._timezone)
     self._jobs = {}
     self._trigger_types = list(TIMER_TRIGGER_TYPES.keys())
     self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                            update_handler=self._handle_update_trigger,
                                            delete_handler=self._handle_delete_trigger,
                                            trigger_types=self._trigger_types,
                                            queue_suffix=self.__class__.__name__,
                                            exclusive=True)
     self._trigger_dispatcher = TriggerDispatcher(LOG)

    def __init__(self, *args, **kwargs):
        super(WebhooksController, self).__init__(*args, **kwargs)
        self._hooks = {}
        self._base_url = '/webhooks/'
        self._trigger_types = [GENERIC_WEBHOOK_TRIGGER_REF]

        self._trigger_dispatcher = TriggerDispatcher(LOG)
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types)
        self._trigger_watcher.start()

 def __init__(self):
     self._timers = TimersHolder()
     self._trigger_types = TIMER_TRIGGER_TYPES.keys()
     queue_suffix = self.__class__.__name__
     self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                            update_handler=self._handle_update_trigger,
                                            delete_handler=self._handle_delete_trigger,
                                            trigger_types=self._trigger_types,
                                            queue_suffix=queue_suffix,
                                            exclusive=True)
     self._trigger_watcher.start()
     self._register_timer_trigger_types()
     self._allowed_timer_types = TIMER_TRIGGER_TYPES.keys()

    def __init__(self, *args, **kwargs):
        super(WebhooksController, self).__init__(*args, **kwargs)
        self._hooks = {}
        self._base_url = '/webhooks/'
        self._trigger_types = WEBHOOK_TRIGGER_TYPES.keys()

        self._trigger_dispatcher = TriggerDispatcher(LOG)
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types,
                                               queue_suffix='webhooks')
        self._trigger_watcher.start()
        self._register_webhook_trigger_types()

    def __init__(self, *args, **kwargs):
        self._hooks = HooksHolder()
        self._base_url = '/webhooks/'
        self._trigger_types = list(WEBHOOK_TRIGGER_TYPES.keys())

        self._trigger_dispatcher_service = TriggerDispatcherService(LOG)
        queue_suffix = self.__class__.__name__
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types,
                                               queue_suffix=queue_suffix,
                                               exclusive=True)
        self._trigger_watcher.start()
        self._register_webhook_trigger_types()

    def __init__(self, pack, file_path, class_name, trigger_types,
                 poll_interval=None, parent_args=None):
        """
        :param pack: Name of the pack this sensor belongs to.
        :type pack: ``str``

        :param file_path: Path to the sensor module file.
        :type file_path: ``str``

        :param class_name: Sensor class name.
        :type class_name: ``str``

        :param trigger_types: A list of references to trigger types which
                                  belong to this sensor.
        :type trigger_types: ``list`` of ``str``

        :param poll_interval: Sensor poll interval (in seconds).
        :type poll_interval: ``int`` or ``None``

        :param parent_args: Command line arguments passed to the parent process.
        :type parse_args: ``list``
        """
        self._pack = pack
        self._file_path = file_path
        self._class_name = class_name
        self._trigger_types = trigger_types or []
        self._poll_interval = poll_interval
        self._parent_args = parent_args or []
        self._trigger_names = {}

        # 1. Parse the config with inherited parent args
        try:
            config.parse_args(args=self._parent_args)
        except Exception:
            pass

        # 2. Instantiate the watcher
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types)

        # 3. Set up logging
        self._logger = logging.getLogger('SensorWrapper.%s' %
                                         (self._class_name))
        logging.setup(cfg.CONF.sensorcontainer.logging)

        self._sensor_instance = self._get_sensor_instance()

    def __init__(self, *args, **kwargs):
        super(WebhooksController, self).__init__(*args, **kwargs)
        self._hooks = HooksHolder()
        self._base_url = "/webhooks/"
        self._trigger_types = WEBHOOK_TRIGGER_TYPES.keys()

        self._trigger_dispatcher = TriggerDispatcher(LOG)
        queue_suffix = self.__class__.__name__
        self._trigger_watcher = TriggerWatcher(
            create_handler=self._handle_create_trigger,
            update_handler=self._handle_update_trigger,
            delete_handler=self._handle_delete_trigger,
            trigger_types=self._trigger_types,
            queue_suffix=queue_suffix,
            exclusive=True,
        )
        self._trigger_watcher.start()
        self._register_webhook_trigger_types()

class SensorWrapper(object):
    def __init__(self, pack, file_path, class_name, trigger_types,
                 poll_interval=None, parent_args=None):
        """
        :param pack: Name of the pack this sensor belongs to.
        :type pack: ``str``

        :param file_path: Path to the sensor module file.
        :type file_path: ``str``

        :param class_name: Sensor class name.
        :type class_name: ``str``

        :param trigger_types: A list of references to trigger types which
                                  belong to this sensor.
        :type trigger_types: ``list`` of ``str``

        :param poll_interval: Sensor poll interval (in seconds).
        :type poll_interval: ``int`` or ``None``

        :param parent_args: Command line arguments passed to the parent process.
        :type parse_args: ``list``
        """
        self._pack = pack
        self._file_path = file_path
        self._class_name = class_name
        self._trigger_types = trigger_types or []
        self._poll_interval = poll_interval
        self._parent_args = parent_args or []
        self._trigger_names = {}

        # 1. Parse the config with inherited parent args
        try:
            config.parse_args(args=self._parent_args)
        except Exception:
            pass

        # 2. Establish DB connection
        username = cfg.CONF.database.username if hasattr(cfg.CONF.database, 'username') else None
        password = cfg.CONF.database.password if hasattr(cfg.CONF.database, 'password') else None
        db_setup_with_retry(cfg.CONF.database.db_name, cfg.CONF.database.host,
                            cfg.CONF.database.port, username=username, password=password,
                            ssl=cfg.CONF.database.ssl, ssl_keyfile=cfg.CONF.database.ssl_keyfile,
                            ssl_certfile=cfg.CONF.database.ssl_certfile,
                            ssl_cert_reqs=cfg.CONF.database.ssl_cert_reqs,
                            ssl_ca_certs=cfg.CONF.database.ssl_ca_certs,
                            ssl_match_hostname=cfg.CONF.database.ssl_match_hostname)

        # 3. Instantiate the watcher
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types,
                                               queue_suffix='sensorwrapper_%s_%s' %
                                               (self._pack, self._class_name),
                                               exclusive=True)

        # 4. Set up logging
        self._logger = logging.getLogger('SensorWrapper.%s.%s' %
                                         (self._pack, self._class_name))
        logging.setup(cfg.CONF.sensorcontainer.logging)

        if '--debug' in parent_args:
            set_log_level_for_all_loggers()

        self._sensor_instance = self._get_sensor_instance()

    def run(self):
        atexit.register(self.stop)

        self._trigger_watcher.start()
        self._logger.info('Watcher started')

        self._logger.info('Running sensor initialization code')
        self._sensor_instance.setup()

        if self._poll_interval:
            message = ('Running sensor in active mode (poll interval=%ss)' %
                       (self._poll_interval))
        else:
            message = 'Running sensor in passive mode'

        self._logger.info(message)

        try:
            self._sensor_instance.run()
        except Exception as e:
            # Include traceback
            msg = ('Sensor "%s" run method raised an exception: %s.' %
                   (self._class_name, str(e)))
            self._logger.warn(msg, exc_info=True)
            raise Exception(msg)

    def stop(self):
        # Stop watcher
        self._logger.info('Stopping trigger watcher')
        self._trigger_watcher.stop()

        # Run sensor cleanup code
        self._logger.info('Invoking cleanup on sensor')
#.........这里部分代码省略.........

class St2Timer(object):
    """
    A timer interface that uses APScheduler 3.0.
    """
    def __init__(self, local_timezone=None):
        self._timezone = local_timezone
        self._scheduler = BlockingScheduler(timezone=self._timezone)
        self._jobs = {}
        self._trigger_types = TIMER_TRIGGER_TYPES.keys()
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types,
                                               queue_suffix=self.__class__.__name__,
                                               exclusive=True)
        self._trigger_dispatcher = TriggerDispatcher(LOG)

    def start(self):
        self._register_timer_trigger_types()
        self._trigger_watcher.start()
        self._scheduler.start()

    def cleanup(self):
        self._scheduler.shutdown(wait=True)

    def add_trigger(self, trigger):
        self._add_job_to_scheduler(trigger)

    def update_trigger(self, trigger):
        self.remove_trigger(trigger)
        self.add_trigger(trigger)

    def remove_trigger(self, trigger):
        trigger_id = trigger['id']

        try:
            job_id = self._jobs[trigger_id]
        except KeyError:
            LOG.info('Job not found: %s', trigger_id)
            return

        self._scheduler.remove_job(job_id)
        del self._jobs[trigger_id]

    def _add_job_to_scheduler(self, trigger):
        trigger_type_ref = trigger['type']
        trigger_type = TIMER_TRIGGER_TYPES[trigger_type_ref]
        try:
            jsonschema.validate(trigger['parameters'],
                                trigger_type['parameters_schema'])
        except jsonschema.ValidationError as e:
            LOG.error('Exception scheduling timer: %s, %s',
                      trigger['parameters'], e, exc_info=True)
            raise  # Or should we just return?

        time_spec = trigger['parameters']
        time_zone = aps_utils.astimezone(trigger['parameters'].get('timezone'))

        time_type = None

        if trigger_type['name'] == 'st2.IntervalTimer':
            unit = time_spec.get('unit', None)
            value = time_spec.get('delta', None)
            time_type = IntervalTrigger(**{unit: value, 'timezone': time_zone})
        elif trigger_type['name'] == 'st2.DateTimer':
            # Raises an exception if date string isn't a valid one.
            dat = date_parser.parse(time_spec.get('date', None))
            time_type = DateTrigger(dat, timezone=time_zone)
        elif trigger_type['name'] == 'st2.CronTimer':
            cron = time_spec.copy()
            cron['timezone'] = time_zone

            time_type = CronTrigger(**cron)

        utc_now = date_utils.get_datetime_utc_now()
        if hasattr(time_type, 'run_date') and utc_now > time_type.run_date:
            LOG.warning('Not scheduling expired timer: %s : %s',
                        trigger['parameters'], time_type.run_date)
        else:
            self._add_job(trigger, time_type)
        return time_type

    def _add_job(self, trigger, time_type, replace=True):
        try:
            job = self._scheduler.add_job(self._emit_trigger_instance,
                                          trigger=time_type,
                                          args=[trigger],
                                          replace_existing=replace)
            LOG.info('Job %s scheduled.', job.id)
            self._jobs[trigger['id']] = job.id
        except Exception as e:
            LOG.error('Exception scheduling timer: %s, %s',
                      trigger['parameters'], e, exc_info=True)

    def _emit_trigger_instance(self, trigger):
        utc_now = date_utils.get_datetime_utc_now()
        # debug logging is reasonable for this one. A high resolution timer will end up
        # trashing standard logs.
        LOG.debug('Timer fired at: %s. Trigger: %s', str(utc_now), trigger)

#.........这里部分代码省略.........

class WebhooksController(pecan.rest.RestController):
    def __init__(self, *args, **kwargs):
        super(WebhooksController, self).__init__(*args, **kwargs)
        self._hooks = {}
        self._base_url = '/webhooks/'
        self._trigger_types = [GENERIC_WEBHOOK_TRIGGER_REF]

        self._trigger_dispatcher = TriggerDispatcher(LOG)
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types)
        self._trigger_watcher.start()

    @jsexpose(str, status_code=http_client.ACCEPTED)
    def post(self, *args, **kwargs):
        hook = '/'.join(args)  # TODO: There must be a better way to do this.
        LOG.info('POST /webhooks/ with hook=%s', hook)

        if not self._is_valid_hook(hook):
            msg = 'Webhook %s not registered with st2' % hook
            return pecan.abort(http_client.NOT_FOUND, msg)

        body = pecan.request.body
        try:
            body = json.loads(body)
        except ValueError:
            msg = 'Invalid JSON body: %s' % (body)
            return pecan.abort(http_client.BAD_REQUEST, msg)

        trigger = self._get_trigger_for_hook(hook)
        payload = {}
        payload['headers'] = self._get_headers_as_dict(pecan.request.headers)
        payload['body'] = body
        self._trigger_dispatcher.dispatch(trigger, payload=payload)

        return body

    def _is_valid_hook(self, hook):
        # TODO: Validate hook payload with payload_schema.
        return hook in self._hooks

    def _get_trigger_for_hook(self, hook):
        return self._hooks[hook]

    def add_trigger(self, trigger):
        url = trigger['parameters']['url']
        LOG.info('Listening to endpoint: %s', urljoin(self._base_url, url))
        self._hooks[url] = trigger

    def update_trigger(self, trigger):
        pass

    def remove_trigger(self, trigger):
        url = trigger['parameters']['url']

        if url in self._hooks:
            LOG.info('Stop listening to endpoint: %s', urljoin(self._base_url, url))
            del self._hooks[url]

    def _get_headers_as_dict(self, headers):
        headers_dict = {}
        for key, value in headers.items():
            headers_dict[key] = value
        return headers_dict

    ##############################################
    # Event handler methods for the trigger events
    ##############################################

    def _handle_create_trigger(self, trigger):
        LOG.debug('Calling "add_trigger" method (trigger.type=%s)' % (trigger.type))
        trigger = self._sanitize_trigger(trigger=trigger)
        self.add_trigger(trigger=trigger)

    def _handle_update_trigger(self, trigger):
        LOG.debug('Calling "update_trigger" method (trigger.type=%s)' % (trigger.type))
        trigger = self._sanitize_trigger(trigger=trigger)
        self.update_trigger(trigger=trigger)

    def _handle_delete_trigger(self, trigger):
        LOG.debug('Calling "remove_trigger" method (trigger.type=%s)' % (trigger.type))
        trigger = self._sanitize_trigger(trigger=trigger)
        self.remove_trigger(trigger=trigger)

    def _sanitize_trigger(self, trigger):
        sanitized = trigger._data
        if 'id' in sanitized:
            # Friendly objectid rather than the MongoEngine representation.
            sanitized['id'] = str(sanitized['id'])
        return sanitized

class WebhooksController(object):
    def __init__(self, *args, **kwargs):
        self._hooks = HooksHolder()
        self._base_url = '/webhooks/'
        self._trigger_types = list(WEBHOOK_TRIGGER_TYPES.keys())

        self._trigger_dispatcher_service = TriggerDispatcherService(LOG)
        queue_suffix = self.__class__.__name__
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types,
                                               queue_suffix=queue_suffix,
                                               exclusive=True)
        self._trigger_watcher.start()
        self._register_webhook_trigger_types()

    def get_all(self):
        # Return only the hooks known by this controller.
        return self._hooks.get_all()

    def get_one(self, url, requester_user):
        triggers = self._hooks.get_triggers_for_hook(url)

        if not triggers:
            abort(http_client.NOT_FOUND)
            return

        permission_type = PermissionType.WEBHOOK_VIEW
        rbac_utils.assert_user_has_resource_db_permission(user_db=requester_user,
                                                          resource_db=WebhookDB(name=url),
                                                          permission_type=permission_type)

        # For demonstration purpose return 1st
        return triggers[0]

    def post(self, hook, webhook_body_api, headers, requester_user):
        body = webhook_body_api.data

        permission_type = PermissionType.WEBHOOK_SEND
        rbac_utils.assert_user_has_resource_db_permission(user_db=requester_user,
                                                          resource_db=WebhookDB(name=hook),
                                                          permission_type=permission_type)

        headers = self._get_headers_as_dict(headers)

        # If webhook contains a trace-tag use that else create create a unique trace-tag.
        trace_context = self._create_trace_context(trace_tag=headers.pop(TRACE_TAG_HEADER, None),
                                                   hook=hook)

        if hook == 'st2' or hook == 'st2/':
            # When using st2 or system webhook, body needs to always be a dict
            if not isinstance(body, dict):
                type_string = get_json_type_for_python_value(body)
                msg = ('Webhook body needs to be an object, got: %s' % (type_string))
                raise ValueError(msg)

            trigger = body.get('trigger', None)
            payload = body.get('payload', None)

            if not trigger:
                msg = 'Trigger not specified.'
                return abort(http_client.BAD_REQUEST, msg)

            self._trigger_dispatcher_service.dispatch_with_context(trigger=trigger,
                   payload=payload,
                   trace_context=trace_context,
                   throw_on_validation_error=True)
        else:
            if not self._is_valid_hook(hook):
                self._log_request('Invalid hook.', headers, body)
                msg = 'Webhook %s not registered with st2' % hook
                return abort(http_client.NOT_FOUND, msg)

            triggers = self._hooks.get_triggers_for_hook(hook)
            payload = {}

            payload['headers'] = headers
            payload['body'] = body

            # Dispatch trigger instance for each of the trigger found
            for trigger_dict in triggers:
                # TODO: Instead of dispatching the whole dict we should just
                # dispatch TriggerDB.ref or similar
                self._trigger_dispatcher_service.dispatch_with_context(trigger=trigger_dict,
                   payload=payload,
                   trace_context=trace_context,
                   throw_on_validation_error=True)

        return Response(json=body, status=http_client.ACCEPTED)

    def _is_valid_hook(self, hook):
        # TODO: Validate hook payload with payload_schema.
        return hook in self._hooks

    def _register_webhook_trigger_types(self):
        for trigger_type in WEBHOOK_TRIGGER_TYPES.values():
            trigger_service.create_trigger_type_db(trigger_type)

    def _create_trace_context(self, trace_tag, hook):
#.........这里部分代码省略.........

class WebhooksController(RestController):
    def __init__(self, *args, **kwargs):
        super(WebhooksController, self).__init__(*args, **kwargs)
        self._hooks = {}
        self._base_url = '/webhooks/'
        self._trigger_types = WEBHOOK_TRIGGER_TYPES.keys()

        self._trigger_dispatcher = TriggerDispatcher(LOG)
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types,
                                               queue_suffix='webhooks')
        self._trigger_watcher.start()
        self._register_webhook_trigger_types()

    @jsexpose()
    def get_all(self):
        # Return only the hooks known by this controller.
        return [trigger for trigger in six.itervalues(self._hooks)]

    @jsexpose()
    def get_one(self, name):
        hook = self._hooks.get(name, None)

        if not hook:
            abort(http_client.NOT_FOUND)
            return

        return hook

    @jsexpose(arg_types=[str], status_code=http_client.ACCEPTED)
    def post(self, *args, **kwargs):
        hook = '/'.join(args)  # TODO: There must be a better way to do this.
        body = pecan.request.body
        try:
            body = json.loads(body)
        except ValueError:
            self._log_request('Invalid JSON body.', pecan.request)
            msg = 'Invalid JSON body: %s' % (body)
            return pecan.abort(http_client.BAD_REQUEST, msg)

        if hook == 'st2' or hook == 'st2/':
            return self._handle_st2_webhook(body)

        if not self._is_valid_hook(hook):
            self._log_request('Invalid hook.', pecan.request)
            msg = 'Webhook %s not registered with st2' % hook
            return pecan.abort(http_client.NOT_FOUND, msg)

        trigger = self._get_trigger_for_hook(hook)
        payload = {}
        payload['headers'] = self._get_headers_as_dict(pecan.request.headers)
        payload['body'] = body
        self._trigger_dispatcher.dispatch(trigger, payload=payload)

        return body

    def _handle_st2_webhook(self, body):
        trigger = body.get('trigger', None)
        payload = body.get('payload', None)
        if not trigger:
            msg = 'Trigger not specified.'
            return pecan.abort(http_client.BAD_REQUEST, msg)
        self._trigger_dispatcher.dispatch(trigger, payload=payload)

        return body

    def _is_valid_hook(self, hook):
        # TODO: Validate hook payload with payload_schema.
        return hook in self._hooks

    def _get_trigger_for_hook(self, hook):
        return self._hooks[hook]

    def _register_webhook_trigger_types(self):
        for trigger_type in WEBHOOK_TRIGGER_TYPES.values():
            trigger_service.create_trigger_type_db(trigger_type)

    def add_trigger(self, trigger):
        url = trigger['parameters']['url']
        LOG.info('Listening to endpoint: %s', urljoin(self._base_url, url))
        self._hooks[url] = trigger

    def update_trigger(self, trigger):
        pass

    def remove_trigger(self, trigger):
        url = trigger['parameters']['url']

        if url in self._hooks:
            LOG.info('Stop listening to endpoint: %s', urljoin(self._base_url, url))
            del self._hooks[url]

    def _get_headers_as_dict(self, headers):
        headers_dict = {}
        for key, value in headers.items():
            headers_dict[key] = value
        return headers_dict

#.........这里部分代码省略.........

class WebhooksController(RestController):
    def __init__(self, *args, **kwargs):
        super(WebhooksController, self).__init__(*args, **kwargs)
        self._hooks = HooksHolder()
        self._base_url = "/webhooks/"
        self._trigger_types = WEBHOOK_TRIGGER_TYPES.keys()

        self._trigger_dispatcher = TriggerDispatcher(LOG)
        queue_suffix = self.__class__.__name__
        self._trigger_watcher = TriggerWatcher(
            create_handler=self._handle_create_trigger,
            update_handler=self._handle_update_trigger,
            delete_handler=self._handle_delete_trigger,
            trigger_types=self._trigger_types,
            queue_suffix=queue_suffix,
            exclusive=True,
        )
        self._trigger_watcher.start()
        self._register_webhook_trigger_types()

    @jsexpose()
    def get_all(self):
        # Return only the hooks known by this controller.
        return self._hooks.get_all()

    @jsexpose()
    def get_one(self, name):
        triggers = self._hooks.get_triggers_for_hook(name)

        if not triggers:
            abort(http_client.NOT_FOUND)
            return

        # For demonstration purpose return 1st
        return triggers[0]

    @request_user_has_webhook_permission(permission_type=PermissionType.WEBHOOK_SEND)
    @jsexpose(arg_types=[str], status_code=http_client.ACCEPTED)
    def post(self, *args, **kwargs):
        hook = "/".join(args)  # TODO: There must be a better way to do this.

        # Note: For backward compatibility reasons we default to application/json if content
        # type is not explicitly provided
        content_type = pecan.request.headers.get("Content-Type", "application/json")
        content_type = parse_content_type_header(content_type=content_type)[0]
        body = pecan.request.body

        try:
            body = self._parse_request_body(content_type=content_type, body=body)
        except Exception as e:
            self._log_request("Failed to parse request body: %s." % (str(e)), pecan.request)
            msg = 'Failed to parse request body "%s": %s' % (body, str(e))
            return pecan.abort(http_client.BAD_REQUEST, msg)

        headers = self._get_headers_as_dict(pecan.request.headers)
        # If webhook contains a trace-tag use that else create create a unique trace-tag.
        trace_context = self._create_trace_context(trace_tag=headers.pop(TRACE_TAG_HEADER, None), hook=hook)

        if hook == "st2" or hook == "st2/":
            return self._handle_st2_webhook(body, trace_context=trace_context)

        if not self._is_valid_hook(hook):
            self._log_request("Invalid hook.", pecan.request)
            msg = "Webhook %s not registered with st2" % hook
            return pecan.abort(http_client.NOT_FOUND, msg)

        triggers = self._hooks.get_triggers_for_hook(hook)
        payload = {}

        payload["headers"] = headers
        payload["body"] = body
        # Dispatch trigger instance for each of the trigger found
        for trigger in triggers:
            self._trigger_dispatcher.dispatch(trigger, payload=payload, trace_context=trace_context)

        return body

    def _parse_request_body(self, content_type, body):
        if content_type == "application/json":
            self._log_request("Parsing request body as JSON", request=pecan.request)
            body = json.loads(body)
        elif content_type in ["application/x-www-form-urlencoded", "multipart/form-data"]:
            self._log_request("Parsing request body as form encoded data", request=pecan.request)
            body = urlparse.parse_qs(body)
        else:
            raise ValueError('Unsupported Content-Type: "%s"' % (content_type))

        return body

    def _handle_st2_webhook(self, body, trace_context):
        trigger = body.get("trigger", None)
        payload = body.get("payload", None)
        if not trigger:
            msg = "Trigger not specified."
            return pecan.abort(http_client.BAD_REQUEST, msg)
        self._trigger_dispatcher.dispatch(trigger, payload=payload, trace_context=trace_context)

        return body

    def _is_valid_hook(self, hook):
#.........这里部分代码省略.........

class SensorWrapper(object):
    def __init__(self, pack, file_path, class_name, trigger_types,
                 poll_interval=None, parent_args=None):
        """
        :param pack: Name of the pack this sensor belongs to.
        :type pack: ``str``

        :param file_path: Path to the sensor module file.
        :type file_path: ``str``

        :param class_name: Sensor class name.
        :type class_name: ``str``

        :param trigger_types: A list of references to trigger types which
                                  belong to this sensor.
        :type trigger_types: ``list`` of ``str``

        :param poll_interval: Sensor poll interval (in seconds).
        :type poll_interval: ``int`` or ``None``

        :param parent_args: Command line arguments passed to the parent process.
        :type parse_args: ``list``
        """
        self._pack = pack
        self._file_path = file_path
        self._class_name = class_name
        self._trigger_types = trigger_types or []
        self._poll_interval = poll_interval
        self._parent_args = parent_args or []
        self._trigger_names = {}

        # 1. Parse the config with inherited parent args
        try:
            config.parse_args(args=self._parent_args)
        except Exception:
            pass

        # 2. Establish DB connection
        username = cfg.CONF.database.username if hasattr(cfg.CONF.database, 'username') else None
        password = cfg.CONF.database.password if hasattr(cfg.CONF.database, 'password') else None
        db_setup(cfg.CONF.database.db_name, cfg.CONF.database.host, cfg.CONF.database.port,
                 username=username, password=password)

        # 3. Instantiate the watcher
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types,
                                               queue_suffix='sensorwrapper')

        # 4. Set up logging
        self._logger = logging.getLogger('SensorWrapper.%s' %
                                         (self._class_name))
        logging.setup(cfg.CONF.sensorcontainer.logging)

        self._sensor_instance = self._get_sensor_instance()

    def run(self):
        atexit.register(self.stop)

        self._trigger_watcher.start()
        self._logger.info('Watcher started')

        self._logger.info('Running sensor initialization code')
        self._sensor_instance.setup()

        if self._poll_interval:
            message = ('Running sensor in active mode (poll interval=%ss)' %
                       (self._poll_interval))
        else:
            message = 'Running sensor in passive mode'

        self._logger.info(message)

        try:
            self._sensor_instance.run()
        except Exception as e:
            # Include traceback
            msg = ('Sensor "%s" run method raised an exception: %s.' %
                   (self._class_name, str(e)))
            self._logger.warn(msg, exc_info=True)
            raise Exception(msg)

    def stop(self):
        # Stop watcher
        self._logger.info('Stopping trigger watcher')
        self._trigger_watcher.stop()

        # Run sensor cleanup code
        self._logger.info('Invoking cleanup on sensor')
        self._sensor_instance.cleanup()

    ##############################################
    # Event handler methods for the trigger events
    ##############################################

    def _handle_create_trigger(self, trigger):
        self._logger.debug('Calling sensor "add_trigger" method (trigger.type=%s)' %
                           (trigger.type))
        self._trigger_names[str(trigger.id)] = trigger
#.........这里部分代码省略.........

class WebhooksController(RestController):
    def __init__(self, *args, **kwargs):
        super(WebhooksController, self).__init__(*args, **kwargs)
        self._hooks = {}
        self._base_url = '/webhooks/'
        self._trigger_types = WEBHOOK_TRIGGER_TYPES.keys()

        self._trigger_dispatcher = TriggerDispatcher(LOG)
        queue_suffix = self.__class__.__name__
        self._trigger_watcher = TriggerWatcher(create_handler=self._handle_create_trigger,
                                               update_handler=self._handle_update_trigger,
                                               delete_handler=self._handle_delete_trigger,
                                               trigger_types=self._trigger_types,
                                               queue_suffix=queue_suffix,
                                               exclusive=True)
        self._trigger_watcher.start()
        self._register_webhook_trigger_types()

    @jsexpose()
    def get_all(self):
        # Return only the hooks known by this controller.
        return [trigger for trigger in six.itervalues(self._hooks)]

    @jsexpose()
    def get_one(self, name):
        hook = self._hooks.get(name, None)

        if not hook:
            abort(http_client.NOT_FOUND)
            return

        return hook

    @request_user_has_webhook_permission(permission_type=PermissionType.WEBHOOK_SEND)
    @jsexpose(arg_types=[str], status_code=http_client.ACCEPTED)
    def post(self, *args, **kwargs):
        hook = '/'.join(args)  # TODO: There must be a better way to do this.

        # Note: For backward compatibility reasons we default to application/json if content
        # type is not explicitly provided
        content_type = pecan.request.headers.get('Content-Type', 'application/json')
        body = pecan.request.body

        try:
            body = self._parse_request_body(content_type=content_type, body=body)
        except Exception as e:
            self._log_request('Failed to parse request body: %s.' % (str(e)), pecan.request)
            msg = 'Failed to parse request body "%s": %s' % (body, str(e))
            return pecan.abort(http_client.BAD_REQUEST, msg)

        he