| /* |
| * Copyright 2014-present Open Networking Foundation |
| * |
| * 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.topology; |
| |
| import org.onosproject.event.AbstractEvent; |
| import org.onosproject.event.Event; |
| |
| import java.util.List; |
| |
| /** |
| * Describes network topology event. |
| */ |
| public class TopologyEvent extends AbstractEvent<TopologyEvent.Type, Topology> { |
| |
| private final List<Event> reasons; |
| |
| /** |
| * Type of topology events. |
| */ |
| public enum Type { |
| /** |
| * Signifies that topology has changed. |
| */ |
| TOPOLOGY_CHANGED |
| } |
| |
| /** |
| * Creates an event of a given type and for the specified topology and the |
| * current time. |
| * |
| * @param type topology event type |
| * @param topology event topology subject |
| * @param reasons list of events that triggered topology change |
| */ |
| public TopologyEvent(Type type, Topology topology, List<Event> reasons) { |
| super(type, topology); |
| this.reasons = reasons; |
| } |
| |
| /** |
| * Creates an event of a given type and for the specified topology and time. |
| * |
| * @param type link event type |
| * @param topology event topology subject |
| * @param reasons list of events that triggered topology change |
| * @param time occurrence time |
| */ |
| public TopologyEvent(Type type, Topology topology, List<Event> reasons, |
| long time) { |
| super(type, topology, time); |
| this.reasons = reasons; |
| } |
| |
| |
| /** |
| * Returns the list of events that triggered the topology change. |
| * |
| * @return list of events responsible for change in topology; null if |
| * initial topology computation |
| */ |
| public List<Event> reasons() { |
| return reasons; |
| } |
| |
| } |