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/*
* Copyright 2014 Open Networking Laboratory
*
* 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.
*/
package org.onosproject.net;
/**
* Abstraction of a network infrastructure link.
*/
public interface Link extends Annotated, Provided, NetworkResource {
/**
* Coarse representation of the link type.
*/
enum Type {
/**
* Signifies that this is a direct single-segment link.
*/
DIRECT,
/**
* Signifies that this link is potentially comprised from multiple
* underlying segments or hops, and as such should be used to tag
* links traversing optical paths, tunnels or intervening 'dark'
* switches.
*/
INDIRECT,
/**
* Signifies that this link is an edge, i.e. host link.
*/
EDGE,
/**
* Signifies that this link represents a logical link backed by
* some form of a tunnel, e.g., GRE, MPLS, ODUk, OCH.
*/
TUNNEL,
/**
* Signifies that this link is realized by fiber (either single channel or WDM).
*/
OPTICAL,
/**
* Signifies that this link is a virtual link or a pseudo-wire.
*/
VIRTUAL
}
/**
* Representation of the link state, which applies primarily only to
* configured durable links, i.e. those that need to remain present,
* but instead be marked as inactive.
*/
enum State {
/**
* Signifies that a link is currently active.
*/
ACTIVE,
/**
* Signifies that a link is currently active.
*/
INACTIVE
}
/**
* Returns the link source connection point.
*
* @return link source connection point
*/
ConnectPoint src();
/**
* Returns the link destination connection point.
*
* @return link destination connection point
*/
ConnectPoint dst();
/**
* Returns the link type.
*
* @return link type
*/
Type type();
/**
* Returns the link state.
*
* @return link state
*/
State state();
/**
* Indicates if the link is to be considered durable.
*
* @return true if the link is durable
*/
boolean isDurable();
}
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