tom | edf06bb | 2014-08-27 16:22:15 -0700 | [diff] [blame] | 1 | package org.onlab.onos.net.topology; |
| 2 | |
| 3 | import org.onlab.onos.event.AbstractEvent; |
tom | 95329eb | 2014-10-06 08:40:06 -0700 | [diff] [blame] | 4 | import org.onlab.onos.event.Event; |
| 5 | |
| 6 | import java.util.List; |
tom | edf06bb | 2014-08-27 16:22:15 -0700 | [diff] [blame] | 7 | |
| 8 | /** |
| 9 | * Describes network topology event. |
| 10 | */ |
| 11 | public class TopologyEvent extends AbstractEvent<TopologyEvent.Type, Topology> { |
| 12 | |
tom | 95329eb | 2014-10-06 08:40:06 -0700 | [diff] [blame] | 13 | private final List<Event> reasons; |
| 14 | |
tom | edf06bb | 2014-08-27 16:22:15 -0700 | [diff] [blame] | 15 | /** |
| 16 | * Type of topology events. |
| 17 | */ |
| 18 | public enum Type { |
| 19 | /** |
| 20 | * Signifies that topology has changed. |
| 21 | */ |
| 22 | TOPOLOGY_CHANGED |
| 23 | } |
| 24 | |
| 25 | /** |
| 26 | * Creates an event of a given type and for the specified topology and the |
| 27 | * current time. |
| 28 | * |
| 29 | * @param type topology event type |
| 30 | * @param topology event topology subject |
tom | 95329eb | 2014-10-06 08:40:06 -0700 | [diff] [blame] | 31 | * @param reasons list of events that triggered topology change |
tom | edf06bb | 2014-08-27 16:22:15 -0700 | [diff] [blame] | 32 | */ |
tom | 95329eb | 2014-10-06 08:40:06 -0700 | [diff] [blame] | 33 | public TopologyEvent(Type type, Topology topology, List<Event> reasons) { |
tom | edf06bb | 2014-08-27 16:22:15 -0700 | [diff] [blame] | 34 | super(type, topology); |
tom | 95329eb | 2014-10-06 08:40:06 -0700 | [diff] [blame] | 35 | this.reasons = reasons; |
tom | edf06bb | 2014-08-27 16:22:15 -0700 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | /** |
| 39 | * Creates an event of a given type and for the specified topology and time. |
| 40 | * |
| 41 | * @param type link event type |
| 42 | * @param topology event topology subject |
tom | 95329eb | 2014-10-06 08:40:06 -0700 | [diff] [blame] | 43 | * @param reasons list of events that triggered topology change |
tom | edf06bb | 2014-08-27 16:22:15 -0700 | [diff] [blame] | 44 | * @param time occurrence time |
| 45 | */ |
tom | 95329eb | 2014-10-06 08:40:06 -0700 | [diff] [blame] | 46 | public TopologyEvent(Type type, Topology topology, List<Event> reasons, |
| 47 | long time) { |
tom | edf06bb | 2014-08-27 16:22:15 -0700 | [diff] [blame] | 48 | super(type, topology, time); |
tom | 95329eb | 2014-10-06 08:40:06 -0700 | [diff] [blame] | 49 | this.reasons = reasons; |
| 50 | } |
| 51 | |
| 52 | |
| 53 | /** |
| 54 | * Returns the list of events that triggered the topology change. |
| 55 | * |
| 56 | * @return list of events responsible for change in topology; null if |
| 57 | * initial topology computation |
| 58 | */ |
| 59 | public List<Event> reasons() { |
| 60 | return reasons; |
tom | edf06bb | 2014-08-27 16:22:15 -0700 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | } |