Toshio Koide | b7a578c | 2014-08-22 18:00:54 -0700 | [diff] [blame] | 1 | package net.onrc.onos.core.flowmanager; |
| 2 | |
| 3 | import java.util.concurrent.CopyOnWriteArraySet; |
| 4 | |
| 5 | import net.onrc.onos.api.flowmanager.Flow; |
| 6 | import net.onrc.onos.api.flowmanager.FlowId; |
| 7 | import net.onrc.onos.api.flowmanager.FlowState; |
| 8 | import net.onrc.onos.core.util.serializers.KryoFactory; |
| 9 | |
| 10 | import org.slf4j.Logger; |
| 11 | import org.slf4j.LoggerFactory; |
| 12 | |
| 13 | import com.hazelcast.core.EntryEvent; |
| 14 | import com.hazelcast.core.EntryListener; |
| 15 | import com.hazelcast.core.IMap; |
| 16 | |
| 17 | /** |
| 18 | * This class is used for managing listeners of the {@link SharedFlowMap}. |
| 19 | */ |
| 20 | class SharedFlowMapEventDispatcher implements EntryListener<String, byte[]> { |
| 21 | private CopyOnWriteArraySet<FlowMapEventListener> listeners; |
| 22 | private static final Logger log = LoggerFactory |
| 23 | .getLogger(SharedFlowMapEventDispatcher.class); |
| 24 | |
| 25 | /** |
| 26 | * Creates dispatcher using flow map objects. |
| 27 | * |
| 28 | * @param flowMap the flow map object |
| 29 | * @param flowStateMap the flow state map object |
| 30 | */ |
| 31 | SharedFlowMapEventDispatcher(IMap<String, byte[]> flowMap, |
| 32 | IMap<String, byte[]> flowStateMap) { |
| 33 | listeners = new CopyOnWriteArraySet<>(); |
| 34 | flowMap.addEntryListener(this, true); |
| 35 | flowStateMap.addEntryListener(this, true); |
| 36 | } |
| 37 | |
| 38 | /** |
| 39 | * Adds a listener for listening events related to the map. |
| 40 | * |
| 41 | * @param listener the {@link FlowMapEventListener} to be added |
| 42 | */ |
| 43 | void addListener(FlowMapEventListener listener) { |
| 44 | listeners.add(listener); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Removes a listener for listening events related to the map. |
| 49 | * |
| 50 | * @param listener the {@link FlowMapEventListener} to be removed |
| 51 | */ |
| 52 | void removeListener(FlowMapEventListener listener) { |
| 53 | listeners.remove(listener); |
| 54 | } |
| 55 | |
| 56 | @Override |
| 57 | public void entryAdded(EntryEvent<String, byte[]> event) { |
| 58 | final Object value = KryoFactory.deserialize(event.getValue()); |
| 59 | if (value instanceof Flow) { |
| 60 | // Handles events from flowMap. |
| 61 | final Flow flow = (Flow) value; |
| 62 | log.trace("Flow {} was added", flow); |
| 63 | for (FlowMapEventListener e : listeners) { |
| 64 | e.flowAdded(flow.getId(), flow); |
| 65 | e.flowStateChanged(flow.getId(), null, FlowState.SUBMITTED); |
| 66 | } |
| 67 | } else if (value instanceof FlowState) { |
| 68 | // Handles events from flowStateMap. |
| 69 | final FlowState state = (FlowState) value; |
Pavlin Radoslavov | 165ff47 | 2014-09-02 12:58:41 -0700 | [diff] [blame] | 70 | final FlowId id = FlowId.valueOf(event.getKey()); |
Toshio Koide | b7a578c | 2014-08-22 18:00:54 -0700 | [diff] [blame] | 71 | log.trace("FlowState of FlowId {} was set to {}", id, state); |
| 72 | for (FlowMapEventListener e : listeners) { |
| 73 | e.flowStateChanged(id, FlowState.SUBMITTED, state); |
| 74 | } |
| 75 | } else { |
| 76 | throw new IllegalStateException("Added illegal value: " + value.toString()); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | @Override |
| 81 | public void entryRemoved(EntryEvent<String, byte[]> event) { |
| 82 | final Object value = KryoFactory.deserialize(event.getValue()); |
| 83 | if (value instanceof Flow) { |
| 84 | // Handles events from flowMap. |
| 85 | final Flow flow = (Flow) value; |
| 86 | log.trace("Flow {} was removed", flow); |
| 87 | for (FlowMapEventListener e : listeners) { |
| 88 | e.flowRemoved(flow.getId()); |
| 89 | } |
| 90 | } else if (value instanceof FlowState) { |
| 91 | // Handles events from flowStateMap. |
| 92 | log.trace("FlowState {} of FlowId {} was removed", value, event.getKey()); |
| 93 | } else { |
| 94 | throw new IllegalStateException("Removed illegal value: " + value.toString()); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | @Override |
| 99 | public void entryUpdated(EntryEvent<String, byte[]> event) { |
| 100 | final Object value = KryoFactory.deserialize(event.getValue()); |
| 101 | if (value instanceof Flow) { |
| 102 | // Handles events from flowMap. |
| 103 | log.trace("Flow Updated by {}", value); |
| 104 | } else if (value instanceof FlowState) { |
| 105 | // Handles events from flowStateMap. |
| 106 | Object oldValue = KryoFactory.deserialize(event.getOldValue()); |
| 107 | final FlowState state = (FlowState) value; |
| 108 | final FlowState oldState = (FlowState) oldValue; |
Pavlin Radoslavov | 165ff47 | 2014-09-02 12:58:41 -0700 | [diff] [blame] | 109 | final FlowId id = FlowId.valueOf(event.getKey()); |
Toshio Koide | b7a578c | 2014-08-22 18:00:54 -0700 | [diff] [blame] | 110 | log.trace("FlowState of FlowId {} was updated from {} to {}", |
| 111 | id, oldState, state); |
| 112 | for (FlowMapEventListener e : listeners) { |
| 113 | e.flowStateChanged(id, oldState, state); |
| 114 | } |
| 115 | } else { |
| 116 | throw new IllegalStateException("Updated illegal value: " + value.toString()); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public void entryEvicted(EntryEvent<String, byte[]> event) { |
| 122 | // do nothing. |
| 123 | } |
| 124 | |
| 125 | } |