Nikhil Cheerla | 1cf0f9a | 2015-07-09 12:26:48 -0700 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2015-present Open Networking Laboratory |
Nikhil Cheerla | 1cf0f9a | 2015-07-09 12:26:48 -0700 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.net; |
| 18 | |
Andrey Komarov | 2398d96 | 2016-09-26 15:11:23 +0300 | [diff] [blame] | 19 | import org.onlab.graph.Weight; |
Nikhil Cheerla | 1cf0f9a | 2015-07-09 12:26:48 -0700 | [diff] [blame] | 20 | import org.onosproject.net.provider.ProviderId; |
| 21 | |
| 22 | import java.util.List; |
| 23 | import java.util.Objects; |
Nikhil Cheerla | 1cf0f9a | 2015-07-09 12:26:48 -0700 | [diff] [blame] | 24 | |
| 25 | /** |
| 26 | * Default implementation of a network disjoint path pair. |
| 27 | */ |
| 28 | public class DefaultDisjointPath extends DefaultPath implements DisjointPath { |
| 29 | |
| 30 | private final DefaultPath path1; |
| 31 | private final DefaultPath path2; |
| 32 | |
| 33 | boolean usingPath1 = true; |
| 34 | |
| 35 | /** |
| 36 | * Creates a disjoint path pair from two default paths. |
| 37 | * |
| 38 | * @param providerId provider identity |
| 39 | * @param path1 primary path |
| 40 | * @param path2 backup path |
| 41 | */ |
| 42 | public DefaultDisjointPath(ProviderId providerId, DefaultPath path1, DefaultPath path2) { |
Yuta HIGUCHI | df97013 | 2016-08-09 11:18:30 -0700 | [diff] [blame] | 43 | // Note: cost passed to super will never be used |
Andrey Komarov | 2398d96 | 2016-09-26 15:11:23 +0300 | [diff] [blame] | 44 | super(providerId, path1.links(), path1.weight()); |
Nikhil Cheerla | 1cf0f9a | 2015-07-09 12:26:48 -0700 | [diff] [blame] | 45 | this.path1 = path1; |
| 46 | this.path2 = path2; |
| 47 | } |
| 48 | |
Jayasree Ghosh | d3ff540 | 2016-08-17 18:41:19 +0530 | [diff] [blame] | 49 | /** |
| 50 | * Creates a disjoint path pair from single default paths. |
| 51 | * |
| 52 | * @param providerId provider identity |
| 53 | * @param path1 primary path |
| 54 | */ |
| 55 | public DefaultDisjointPath(ProviderId providerId, DefaultPath path1) { |
| 56 | this(providerId, path1, null); |
| 57 | } |
| 58 | |
Nikhil Cheerla | 1cf0f9a | 2015-07-09 12:26:48 -0700 | [diff] [blame] | 59 | @Override |
| 60 | public List<Link> links() { |
| 61 | if (usingPath1) { |
| 62 | return path1.links(); |
| 63 | } else { |
| 64 | return path2.links(); |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | @Override |
| 69 | public double cost() { |
Andrey Komarov | 2398d96 | 2016-09-26 15:11:23 +0300 | [diff] [blame] | 70 | return usingPath1 ? path1.cost() : path2.cost(); |
| 71 | } |
| 72 | |
| 73 | @Override |
| 74 | public Weight weight() { |
| 75 | return usingPath1 ? path1.weight() : path2.weight(); |
Nikhil Cheerla | 1cf0f9a | 2015-07-09 12:26:48 -0700 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public Path primary() { |
| 80 | return path1; |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public Path backup() { |
| 85 | return path2; |
| 86 | } |
| 87 | |
| 88 | @Override |
| 89 | public int hashCode() { |
Yuta HIGUCHI | df97013 | 2016-08-09 11:18:30 -0700 | [diff] [blame] | 90 | // Note: DisjointPath with primary and secondary swapped |
| 91 | // must result in same hashCode |
| 92 | return Objects.hash(Objects.hashCode(path1) + Objects.hashCode(path2), src(), dst()); |
Nikhil Cheerla | 1cf0f9a | 2015-07-09 12:26:48 -0700 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | @Override |
| 96 | public boolean equals(Object obj) { |
| 97 | if (this == obj) { |
| 98 | return true; |
| 99 | } |
| 100 | if (obj instanceof DefaultDisjointPath) { |
| 101 | final DefaultDisjointPath other = (DefaultDisjointPath) obj; |
Yuta HIGUCHI | df97013 | 2016-08-09 11:18:30 -0700 | [diff] [blame] | 102 | return (Objects.equals(this.path1, other.path1) && Objects.equals(this.path2, other.path2)) || |
| 103 | (Objects.equals(this.path1, other.path2) && Objects.equals(this.path2, other.path1)); |
Nikhil Cheerla | 1cf0f9a | 2015-07-09 12:26:48 -0700 | [diff] [blame] | 104 | } |
| 105 | return false; |
| 106 | } |
| 107 | |
| 108 | @Override |
| 109 | public boolean useBackup() { |
| 110 | if (path2 == null || path2.links() == null) { |
| 111 | return false; |
| 112 | } |
| 113 | usingPath1 = !usingPath1; |
| 114 | return true; |
| 115 | } |
| 116 | } |