Madan Jampani | 08706ce | 2015-04-01 14:49:28 -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 | package org.onosproject.store.consistent.impl; |
| 17 | |
| 18 | import java.util.Collection; |
| 19 | import java.util.Iterator; |
Madan Jampani | 4c281cd | 2015-06-08 11:38:46 -0700 | [diff] [blame^] | 20 | import java.util.Map; |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 21 | import java.util.Set; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 22 | |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 23 | import org.onosproject.store.service.ConsistentMap; |
Madan Jampani | 4c281cd | 2015-06-08 11:38:46 -0700 | [diff] [blame^] | 24 | import org.onosproject.store.service.DistributedSet; |
| 25 | import org.onosproject.store.service.MapEvent; |
| 26 | import org.onosproject.store.service.MapEventListener; |
| 27 | import org.onosproject.store.service.SetEvent; |
| 28 | import org.onosproject.store.service.SetEventListener; |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 29 | |
Madan Jampani | 4c281cd | 2015-06-08 11:38:46 -0700 | [diff] [blame^] | 30 | import com.google.common.collect.Maps; |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 31 | import com.google.common.collect.Sets; |
| 32 | |
| 33 | /** |
| 34 | * Implementation of distributed set that is backed by a ConsistentMap. |
| 35 | |
| 36 | * @param <E> set element type |
| 37 | */ |
Madan Jampani | 4c281cd | 2015-06-08 11:38:46 -0700 | [diff] [blame^] | 38 | public class DefaultDistributedSet<E> implements DistributedSet<E> { |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 39 | |
Madan Jampani | 4c281cd | 2015-06-08 11:38:46 -0700 | [diff] [blame^] | 40 | private final String name; |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 41 | private final ConsistentMap<E, Boolean> backingMap; |
Madan Jampani | 4c281cd | 2015-06-08 11:38:46 -0700 | [diff] [blame^] | 42 | private final Map<SetEventListener<E>, MapEventListener<E, Boolean>> listenerMapping = Maps.newIdentityHashMap(); |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 43 | |
Madan Jampani | 4c281cd | 2015-06-08 11:38:46 -0700 | [diff] [blame^] | 44 | public DefaultDistributedSet(String name, ConsistentMap<E, Boolean> backingMap) { |
| 45 | this.name = name; |
| 46 | this.backingMap = backingMap; |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | @Override |
| 50 | public int size() { |
| 51 | return backingMap.size(); |
| 52 | } |
| 53 | |
| 54 | @Override |
| 55 | public boolean isEmpty() { |
| 56 | return backingMap.isEmpty(); |
| 57 | } |
| 58 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 59 | @SuppressWarnings("unchecked") |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 60 | @Override |
| 61 | public boolean contains(Object o) { |
| 62 | return backingMap.containsKey((E) o); |
| 63 | } |
| 64 | |
| 65 | @Override |
| 66 | public Iterator<E> iterator() { |
| 67 | return backingMap.keySet().iterator(); |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | public Object[] toArray() { |
| 72 | return backingMap.keySet().stream().toArray(); |
| 73 | } |
| 74 | |
| 75 | @Override |
| 76 | public <T> T[] toArray(T[] a) { |
| 77 | return backingMap.keySet().stream().toArray(size -> a); |
| 78 | } |
| 79 | |
| 80 | @Override |
| 81 | public boolean add(E e) { |
| 82 | return backingMap.putIfAbsent(e, true) == null; |
| 83 | } |
| 84 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 85 | @SuppressWarnings("unchecked") |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 86 | @Override |
| 87 | public boolean remove(Object o) { |
Madan Jampani | 4c281cd | 2015-06-08 11:38:46 -0700 | [diff] [blame^] | 88 | return backingMap.remove((E) o) != null; |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | @Override |
| 92 | public boolean containsAll(Collection<?> c) { |
| 93 | return c.stream() |
| 94 | .allMatch(this::contains); |
| 95 | } |
| 96 | |
| 97 | @Override |
| 98 | public boolean addAll(Collection<? extends E> c) { |
| 99 | return c.stream() |
| 100 | .map(this::add) |
| 101 | .reduce(Boolean::logicalOr) |
| 102 | .orElse(false); |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public boolean retainAll(Collection<?> c) { |
| 107 | Set<?> retainSet = Sets.newHashSet(c); |
| 108 | return backingMap.keySet() |
| 109 | .stream() |
| 110 | .filter(k -> !retainSet.contains(k)) |
| 111 | .map(this::remove) |
| 112 | .reduce(Boolean::logicalOr) |
| 113 | .orElse(false); |
| 114 | } |
| 115 | |
| 116 | @Override |
| 117 | public boolean removeAll(Collection<?> c) { |
| 118 | Set<?> removeSet = Sets.newHashSet(c); |
| 119 | return backingMap.keySet() |
| 120 | .stream() |
| 121 | .filter(removeSet::contains) |
| 122 | .map(this::remove) |
| 123 | .reduce(Boolean::logicalOr) |
| 124 | .orElse(false); |
| 125 | } |
| 126 | |
| 127 | @Override |
| 128 | public void clear() { |
| 129 | backingMap.clear(); |
| 130 | } |
Madan Jampani | 4c281cd | 2015-06-08 11:38:46 -0700 | [diff] [blame^] | 131 | |
| 132 | @Override |
| 133 | public void addListener(SetEventListener<E> listener) { |
| 134 | MapEventListener<E, Boolean> mapEventListener = mapEvent -> { |
| 135 | if (mapEvent.type() == MapEvent.Type.INSERT) { |
| 136 | listener.event(new SetEvent<>(name, SetEvent.Type.ADD, mapEvent.key())); |
| 137 | } else if (mapEvent.type() == MapEvent.Type.REMOVE) { |
| 138 | listener.event(new SetEvent<>(name, SetEvent.Type.REMOVE, mapEvent.key())); |
| 139 | } |
| 140 | }; |
| 141 | if (listenerMapping.putIfAbsent(listener, mapEventListener) == null) { |
| 142 | backingMap.addListener(mapEventListener); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | @Override |
| 147 | public void removeListener(SetEventListener<E> listener) { |
| 148 | MapEventListener<E, Boolean> mapEventListener = listenerMapping.remove(listener); |
| 149 | if (mapEventListener != null) { |
| 150 | backingMap.removeListener(mapEventListener); |
| 151 | } |
| 152 | } |
Madan Jampani | 08706ce | 2015-04-01 14:49:28 -0700 | [diff] [blame] | 153 | } |