Srikanth Vavilapalli | 37a461b | 2015-04-07 15:12:32 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 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.segmentrouting.grouphandler; |
| 18 | |
| 19 | import static com.google.common.base.Preconditions.checkNotNull; |
| 20 | |
| 21 | import java.util.HashSet; |
| 22 | import java.util.Objects; |
| 23 | import java.util.Set; |
| 24 | |
| 25 | import org.onosproject.net.DeviceId; |
| 26 | |
| 27 | /** |
| 28 | * Representation of a set of neighbor switch dpids along with edge node |
| 29 | * label. Meant to be used as a lookup-key in a hash-map to retrieve an |
| 30 | * ECMP-group that hashes packets to a set of ports connecting to the |
| 31 | * neighbors in this set. |
| 32 | */ |
| 33 | public class NeighborSet { |
| 34 | private final Set<DeviceId> neighbors; |
| 35 | private final int edgeLabel; |
| 36 | public static final int NO_EDGE_LABEL = -1; |
| 37 | |
| 38 | /** |
| 39 | * Constructor with set of neighbors. Edge label is |
| 40 | * default to -1. |
| 41 | * |
| 42 | * @param neighbors set of neighbors to be part of neighbor set |
| 43 | */ |
| 44 | public NeighborSet(Set<DeviceId> neighbors) { |
| 45 | checkNotNull(neighbors); |
| 46 | this.edgeLabel = NO_EDGE_LABEL; |
Sho SHIMIZU | 47b8aa2 | 2015-09-11 11:19:11 -0700 | [diff] [blame] | 47 | this.neighbors = new HashSet<>(); |
Srikanth Vavilapalli | 37a461b | 2015-04-07 15:12:32 -0700 | [diff] [blame] | 48 | this.neighbors.addAll(neighbors); |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Constructor with set of neighbors and edge label. |
| 53 | * |
| 54 | * @param neighbors set of neighbors to be part of neighbor set |
| 55 | * @param edgeLabel label to be pushed as part of group operation |
| 56 | */ |
| 57 | public NeighborSet(Set<DeviceId> neighbors, int edgeLabel) { |
| 58 | checkNotNull(neighbors); |
| 59 | this.edgeLabel = edgeLabel; |
Sho SHIMIZU | 47b8aa2 | 2015-09-11 11:19:11 -0700 | [diff] [blame] | 60 | this.neighbors = new HashSet<>(); |
Srikanth Vavilapalli | 37a461b | 2015-04-07 15:12:32 -0700 | [diff] [blame] | 61 | this.neighbors.addAll(neighbors); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Default constructor for kryo serialization. |
| 66 | */ |
| 67 | public NeighborSet() { |
| 68 | this.edgeLabel = NO_EDGE_LABEL; |
Sho SHIMIZU | 47b8aa2 | 2015-09-11 11:19:11 -0700 | [diff] [blame] | 69 | this.neighbors = new HashSet<>(); |
Srikanth Vavilapalli | 37a461b | 2015-04-07 15:12:32 -0700 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Gets the neighbors part of neighbor set. |
| 74 | * |
| 75 | * @return set of neighbor identifiers |
| 76 | */ |
| 77 | public Set<DeviceId> getDeviceIds() { |
| 78 | return neighbors; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Gets the label associated with neighbor set. |
| 83 | * |
| 84 | * @return integer |
| 85 | */ |
| 86 | public int getEdgeLabel() { |
| 87 | return edgeLabel; |
| 88 | } |
| 89 | |
| 90 | // The list of neighbor ids and label are used for comparison. |
| 91 | @Override |
| 92 | public boolean equals(Object o) { |
| 93 | if (this == o) { |
| 94 | return true; |
| 95 | } |
| 96 | if (!(o instanceof NeighborSet)) { |
| 97 | return false; |
| 98 | } |
| 99 | NeighborSet that = (NeighborSet) o; |
| 100 | return (this.neighbors.containsAll(that.neighbors) && |
| 101 | that.neighbors.containsAll(this.neighbors) && |
| 102 | (this.edgeLabel == that.edgeLabel)); |
| 103 | } |
| 104 | |
| 105 | // The list of neighbor ids and label are used for comparison. |
| 106 | @Override |
| 107 | public int hashCode() { |
| 108 | int result = 17; |
| 109 | int combinedHash = 0; |
| 110 | for (DeviceId d : neighbors) { |
| 111 | combinedHash = combinedHash + Objects.hash(d); |
| 112 | } |
| 113 | result = 31 * result + combinedHash + Objects.hash(edgeLabel); |
| 114 | |
| 115 | return result; |
| 116 | } |
| 117 | |
| 118 | @Override |
| 119 | public String toString() { |
| 120 | return " Neighborset Sw: " + neighbors |
| 121 | + " and Label: " + edgeLabel; |
| 122 | } |
| 123 | } |