From 7e83d0876ddb84a45e130eeba28bc40ef53c074b Mon Sep 17 00:00:00 2001 From: Yaron Yogev Date: Thu, 27 Jul 2017 09:02:54 +0300 Subject: Calipso initial release for OPNFV Change-Id: I7210c244b0c10fa80bfa8c77cb86c9d6ddf8bc88 Signed-off-by: Yaron Yogev --- app/discover/event_handler.py | 45 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 app/discover/event_handler.py (limited to 'app/discover/event_handler.py') diff --git a/app/discover/event_handler.py b/app/discover/event_handler.py new file mode 100644 index 0000000..12199f8 --- /dev/null +++ b/app/discover/event_handler.py @@ -0,0 +1,45 @@ +############################################################################### +# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems) # +# and others # +# # +# All rights reserved. This program and the accompanying materials # +# are made available under the terms of the Apache License, Version 2.0 # +# which accompanies this distribution, and is available at # +# http://www.apache.org/licenses/LICENSE-2.0 # +############################################################################### +from discover.events.event_base import EventBase, EventResult +from utils.inventory_mgr import InventoryMgr +from utils.logging.full_logger import FullLogger +from utils.util import ClassResolver + + +class EventHandler: + + def __init__(self, env: str, inventory_collection: str): + super().__init__() + self.inv = InventoryMgr() + self.inv.set_collections(inventory_collection) + self.env = env + self.log = FullLogger(env=env) + self.handlers = {} + + def discover_handlers(self, handlers_package: str, event_handlers: dict): + if not event_handlers: + raise TypeError("Event handlers list is empty") + + for event_name, handler_name in event_handlers.items(): + handler = ClassResolver.get_instance_of_class(handler_name, handlers_package) + if not issubclass(handler.__class__, EventBase): + raise TypeError("Event handler '{}' is not a subclass of EventBase" + .format(handler_name)) + if event_name in self.handlers: + self.log.warning("A handler is already registered for event type '{}'. Overwriting" + .format(event_name)) + self.handlers[event_name] = handler + + def handle(self, event_name: str, notification: dict) -> EventResult: + if event_name not in self.handlers: + self.log.info("No handler is able to process event of type '{}'" + .format(event_name)) + return self.handlers[event_name].handle(self.env, notification) + -- cgit 1.2.3-korg