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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (c) 2017 Cisco and/or its affiliates.
#
# 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 abc import ABC
from enum import Enum
from netmodel.model.type import Integer, String
from vicn.core.attribute import Attribute, Multiplicity
from vicn.core.resource import FactoryResource
from vicn.resource.icn.icn_application import ICNApplication
from vicn.resource.icn.face import Face
from vicn.resource.icn.route import Route
DEFAULT_CACHE_SIZE = 1000 # pk
DEFAULT_CACHE_POLICY = 'LRU'
DEFAULT_STRATEGY = 'best-route'
class Forwarder(ICNApplication, ABC):
"""
Resource: Forwarder
"""
__type__ = FactoryResource
faces = Attribute(Face, description = 'ICN ffaces of the forwarder',
multiplicity = Multiplicity.OneToMany,
reverse_name = 'forwarder')
routes = Attribute(Route, description = 'Routes in the ICN FIB',
multiplicity = Multiplicity.OneToMany,
reverse_name = 'forwarder')
cache_size = Attribute(Integer,
description = 'Size of the cache (in chunks)',
default = DEFAULT_CACHE_SIZE)
cache_policy = Attribute(String, description = 'Cache policy',
default = DEFAULT_CACHE_POLICY)
strategy = Attribute(String, description = 'Forwarding Strategy',
default = DEFAULT_STRATEGY)
config_file = Attribute(String, description = 'Configuration file')
log_file = Attribute(String, description = 'Log file')
# Overloaded attributes
node = Attribute(
reverse_name = 'forwarder',
reverse_description = 'ICN forwarder attached to the node',
reverse_auto = True,
multiplicity = Multiplicity.OneToOne)
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