| /* |
| * Copyright 2016-present 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.segmentrouting.grouphandler; |
| |
| import com.google.common.collect.Iterables; |
| import org.apache.commons.lang3.RandomUtils; |
| import org.onosproject.net.DeviceId; |
| |
| import java.util.Set; |
| |
| /** |
| * Extends its super classe modifying its internal behavior. |
| * Pick a neighbor will pick a random neighbor. |
| */ |
| public class RandomNeighborSet extends NeighborSet { |
| |
| public RandomNeighborSet(Set<DeviceId> neighbors) { |
| super(neighbors, true); |
| } |
| |
| public RandomNeighborSet(Set<DeviceId> neighbors, int edgeLabel) { |
| super(neighbors, true, edgeLabel); |
| } |
| |
| public RandomNeighborSet() { |
| super(); |
| } |
| |
| @Override |
| public DeviceId getFirstNeighbor() { |
| if (getDeviceIds().isEmpty()) { |
| return DeviceId.NONE; |
| } |
| int size = getDeviceIds().size(); |
| int index = RandomUtils.nextInt(0, size); |
| return Iterables.get(getDeviceIds(), index); |
| } |
| |
| @Override |
| public String toString() { |
| return " RandomNeighborset Sw: " + getDeviceIds() |
| + " and Label: " + getEdgeLabel(); |
| } |
| } |