Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Foundation |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 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 | |
| 17 | package org.onosproject.store.primitives.resources.impl; |
| 18 | |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 19 | import java.util.Collection; |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 20 | import java.util.Collections; |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 21 | import java.util.ConcurrentModificationException; |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 22 | import java.util.Iterator; |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 23 | import java.util.List; |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 24 | import java.util.Map; |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 25 | import java.util.NoSuchElementException; |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 26 | import java.util.Set; |
| 27 | import java.util.concurrent.CompletableFuture; |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 28 | import java.util.concurrent.ConcurrentHashMap; |
| 29 | import java.util.concurrent.Executor; |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 30 | import java.util.function.Function; |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 31 | |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 32 | import com.google.common.collect.Lists; |
| 33 | import com.google.common.collect.Multiset; |
| 34 | import io.atomix.protocols.raft.proxy.RaftProxy; |
| 35 | import org.onlab.util.KryoNamespace; |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 36 | import org.onlab.util.Tools; |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 37 | import org.onosproject.store.serializers.KryoNamespaces; |
| 38 | import org.onosproject.store.service.AsyncConsistentMultimap; |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 39 | import org.onosproject.store.service.AsyncIterator; |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 40 | import org.onosproject.store.service.MultimapEvent; |
| 41 | import org.onosproject.store.service.MultimapEventListener; |
| 42 | import org.onosproject.store.service.Serializer; |
| 43 | import org.onosproject.store.service.Versioned; |
| 44 | |
| 45 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapEvents.CHANGE; |
| 46 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.ADD_LISTENER; |
| 47 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.CLEAR; |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 48 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.CLOSE_ITERATOR; |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 49 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.CONTAINS_ENTRY; |
| 50 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.CONTAINS_KEY; |
| 51 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.CONTAINS_VALUE; |
| 52 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.ContainsEntry; |
| 53 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.ContainsKey; |
| 54 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.ContainsValue; |
| 55 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.ENTRIES; |
| 56 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.GET; |
| 57 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.Get; |
| 58 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.IS_EMPTY; |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 59 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.IteratorBatch; |
| 60 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.IteratorPosition; |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 61 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.KEYS; |
| 62 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.KEY_SET; |
| 63 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.MultiRemove; |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 64 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.NEXT; |
| 65 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.OPEN_ITERATOR; |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 66 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.PUT; |
Jordan Halterman | 8c57a09 | 2018-06-04 14:53:06 -0700 | [diff] [blame] | 67 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.PUT_AND_GET; |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 68 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.Put; |
| 69 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.REMOVE; |
| 70 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.REMOVE_ALL; |
Jordan Halterman | 8c57a09 | 2018-06-04 14:53:06 -0700 | [diff] [blame] | 71 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.REMOVE_AND_GET; |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 72 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.REMOVE_LISTENER; |
| 73 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.REPLACE; |
| 74 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.RemoveAll; |
| 75 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.Replace; |
| 76 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.SIZE; |
| 77 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentSetMultimapOperations.VALUES; |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 78 | |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 79 | |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 80 | /** |
| 81 | * Set based implementation of the {@link AsyncConsistentMultimap}. |
| 82 | * <p> |
| 83 | * Note: this implementation does not allow null entries or duplicate entries. |
| 84 | */ |
Aaron Kruglikov | a1801aa | 2016-07-12 15:17:30 -0700 | [diff] [blame] | 85 | public class AtomixConsistentSetMultimap |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 86 | extends AbstractRaftPrimitive |
| 87 | implements AsyncConsistentMultimap<String, byte[]> { |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 88 | |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 89 | private static final Serializer SERIALIZER = Serializer.using(KryoNamespace.newBuilder() |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 90 | .register(KryoNamespaces.BASIC) |
| 91 | .register(AtomixConsistentSetMultimapOperations.NAMESPACE) |
| 92 | .register(AtomixConsistentSetMultimapEvents.NAMESPACE) |
| 93 | .build()); |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 94 | |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 95 | private final Map<MultimapEventListener<String, byte[]>, Executor> mapEventListeners = new ConcurrentHashMap<>(); |
| 96 | |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 97 | public AtomixConsistentSetMultimap(RaftProxy proxy) { |
| 98 | super(proxy); |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 99 | proxy.addEventListener(CHANGE, SERIALIZER::decode, this::handleChange); |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 100 | proxy.addStateChangeListener(state -> { |
| 101 | if (state == RaftProxy.State.CONNECTED && isListening()) { |
| 102 | proxy.invoke(ADD_LISTENER); |
| 103 | } |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 104 | }); |
| 105 | } |
| 106 | |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 107 | private void handleChange(List<MultimapEvent<String, byte[]>> events) { |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 108 | events.forEach(event -> |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 109 | mapEventListeners.forEach((listener, executor) -> executor.execute(() -> listener.event(event)))); |
| 110 | } |
| 111 | |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 112 | @Override |
| 113 | public CompletableFuture<Integer> size() { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 114 | return proxy.invoke(SIZE, SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | @Override |
| 118 | public CompletableFuture<Boolean> isEmpty() { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 119 | return proxy.invoke(IS_EMPTY, SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | @Override |
| 123 | public CompletableFuture<Boolean> containsKey(String key) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 124 | return proxy.invoke(CONTAINS_KEY, SERIALIZER::encode, new ContainsKey(key), SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | @Override |
| 128 | public CompletableFuture<Boolean> containsValue(byte[] value) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 129 | return proxy.invoke(CONTAINS_VALUE, SERIALIZER::encode, new ContainsValue(value), SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | @Override |
| 133 | public CompletableFuture<Boolean> containsEntry(String key, byte[] value) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 134 | return proxy.invoke(CONTAINS_ENTRY, SERIALIZER::encode, new ContainsEntry(key, value), SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | @Override |
| 138 | public CompletableFuture<Boolean> put(String key, byte[] value) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 139 | return proxy.invoke( |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 140 | PUT, |
| 141 | SERIALIZER::encode, |
| 142 | new Put(key, Lists.newArrayList(value), null), |
| 143 | SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | @Override |
Jordan Halterman | 8c57a09 | 2018-06-04 14:53:06 -0700 | [diff] [blame] | 147 | public CompletableFuture<Versioned<Collection<? extends byte[]>>> putAndGet(String key, byte[] value) { |
| 148 | return proxy.invoke( |
| 149 | PUT_AND_GET, |
| 150 | SERIALIZER::encode, |
| 151 | new Put(key, Lists.newArrayList(value), null), |
| 152 | SERIALIZER::decode); |
| 153 | } |
| 154 | |
| 155 | @Override |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 156 | public CompletableFuture<Boolean> remove(String key, byte[] value) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 157 | return proxy.invoke(REMOVE, SERIALIZER::encode, new MultiRemove(key, |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 158 | Lists.newArrayList(value), |
| 159 | null), SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | @Override |
Jordan Halterman | 8c57a09 | 2018-06-04 14:53:06 -0700 | [diff] [blame] | 163 | public CompletableFuture<Versioned<Collection<? extends byte[]>>> removeAndGet(String key, byte[] value) { |
| 164 | return proxy.invoke(REMOVE_AND_GET, SERIALIZER::encode, new MultiRemove(key, |
| 165 | Lists.newArrayList(value), |
| 166 | null), SERIALIZER::decode); |
| 167 | } |
| 168 | |
| 169 | @Override |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 170 | public CompletableFuture<Boolean> removeAll(String key, Collection<? extends byte[]> values) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 171 | return proxy.invoke( |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 172 | REMOVE, |
| 173 | SERIALIZER::encode, |
| 174 | new MultiRemove(key, (Collection<byte[]>) values, null), |
| 175 | SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | @Override |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 179 | public CompletableFuture<Versioned<Collection<? extends byte[]>>> removeAll(String key) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 180 | return proxy.invoke(REMOVE_ALL, SERIALIZER::encode, new RemoveAll(key, null), SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | @Override |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 184 | public CompletableFuture<Boolean> putAll( |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 185 | String key, Collection<? extends byte[]> values) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 186 | return proxy.invoke(PUT, SERIALIZER::encode, new Put(key, values, null), SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | @Override |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 190 | public CompletableFuture<Versioned<Collection<? extends byte[]>>> replaceValues( |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 191 | String key, Collection<byte[]> values) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 192 | return proxy.invoke( |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 193 | REPLACE, |
| 194 | SERIALIZER::encode, |
| 195 | new Replace(key, values, null), |
| 196 | SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | @Override |
| 200 | public CompletableFuture<Void> clear() { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 201 | return proxy.invoke(CLEAR); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | @Override |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 205 | public CompletableFuture<Versioned<Collection<? extends byte[]>>> get(String key) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 206 | return proxy.invoke(GET, SERIALIZER::encode, new Get(key), SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | @Override |
| 210 | public CompletableFuture<Set<String>> keySet() { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 211 | return proxy.invoke(KEY_SET, SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | @Override |
| 215 | public CompletableFuture<Multiset<String>> keys() { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 216 | return proxy.invoke(KEYS, SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 217 | } |
| 218 | |
Jonathan Hart | ad0c302 | 2017-02-22 14:06:01 -0800 | [diff] [blame] | 219 | @Override |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 220 | public CompletableFuture<Multiset<byte[]>> values() { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 221 | return proxy.invoke(VALUES, SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | @Override |
| 225 | public CompletableFuture<Collection<Map.Entry<String, byte[]>>> entries() { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 226 | return proxy.invoke(ENTRIES, SERIALIZER::decode); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | @Override |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 230 | public CompletableFuture<AsyncIterator<Map.Entry<String, byte[]>>> iterator() { |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 231 | return proxy.<Long>invoke(OPEN_ITERATOR, SERIALIZER::decode).thenApply(ConsistentMultimapIterator::new); |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 234 | /** |
| 235 | * Consistent multimap iterator. |
| 236 | */ |
| 237 | private class ConsistentMultimapIterator implements AsyncIterator<Map.Entry<String, byte[]>> { |
| 238 | private final long id; |
| 239 | private volatile CompletableFuture<IteratorBatch> batch; |
| 240 | private volatile CompletableFuture<Void> closeFuture; |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 241 | |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 242 | ConsistentMultimapIterator(long id) { |
| 243 | this.id = id; |
| 244 | this.batch = CompletableFuture.completedFuture( |
| 245 | new IteratorBatch(0, Collections.emptyList())); |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 246 | } |
| 247 | |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 248 | /** |
| 249 | * Returns the current batch iterator or lazily fetches the next batch from the cluster. |
| 250 | * |
| 251 | * @return the next batch iterator |
| 252 | */ |
| 253 | private CompletableFuture<Iterator<Map.Entry<String, byte[]>>> batch() { |
| 254 | return batch.thenCompose(iterator -> { |
| 255 | if (iterator != null && !iterator.hasNext()) { |
| 256 | batch = fetch(iterator.position()); |
| 257 | return batch.thenApply(Function.identity()); |
| 258 | } |
| 259 | return CompletableFuture.completedFuture(iterator); |
| 260 | }); |
| 261 | } |
| 262 | |
| 263 | /** |
| 264 | * Fetches the next batch of entries from the cluster. |
| 265 | * |
| 266 | * @param position the position from which to fetch the next batch |
| 267 | * @return the next batch of entries from the cluster |
| 268 | */ |
| 269 | private CompletableFuture<IteratorBatch> fetch(int position) { |
| 270 | return proxy.<IteratorPosition, IteratorBatch>invoke( |
| 271 | NEXT, |
| 272 | SERIALIZER::encode, |
| 273 | new IteratorPosition(id, position), |
| 274 | SERIALIZER::decode) |
| 275 | .thenCompose(batch -> { |
| 276 | if (batch == null) { |
| 277 | return close().thenApply(v -> null); |
| 278 | } |
| 279 | return CompletableFuture.completedFuture(batch); |
| 280 | }); |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * Closes the iterator. |
| 285 | * |
| 286 | * @return future to be completed once the iterator has been closed |
| 287 | */ |
| 288 | private CompletableFuture<Void> close() { |
| 289 | if (closeFuture == null) { |
| 290 | synchronized (this) { |
| 291 | if (closeFuture == null) { |
| 292 | closeFuture = proxy.invoke(CLOSE_ITERATOR, SERIALIZER::encode, id); |
| 293 | } |
| 294 | } |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 295 | } |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 296 | return closeFuture; |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | @Override |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 300 | public CompletableFuture<Boolean> hasNext() { |
| 301 | return batch().thenApply(iterator -> iterator != null && iterator.hasNext()); |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | @Override |
Jordan Halterman | 15f3371 | 2018-06-21 00:00:15 -0700 | [diff] [blame] | 305 | public CompletableFuture<Map.Entry<String, byte[]>> next() { |
| 306 | return batch().thenCompose(iterator -> { |
| 307 | if (iterator == null) { |
| 308 | return Tools.exceptionalFuture(new NoSuchElementException()); |
| 309 | } |
| 310 | return CompletableFuture.completedFuture(iterator.next()); |
| 311 | }); |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 312 | } |
| 313 | } |
| 314 | |
| 315 | @Override |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 316 | public CompletableFuture<Void> addListener(MultimapEventListener<String, byte[]> listener, Executor executor) { |
| 317 | if (mapEventListeners.isEmpty()) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 318 | return proxy.invoke(ADD_LISTENER).thenRun(() -> mapEventListeners.put(listener, executor)); |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 319 | } else { |
| 320 | mapEventListeners.put(listener, executor); |
| 321 | return CompletableFuture.completedFuture(null); |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | @Override |
| 326 | public CompletableFuture<Void> removeListener(MultimapEventListener<String, byte[]> listener) { |
| 327 | if (mapEventListeners.remove(listener) != null && mapEventListeners.isEmpty()) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 328 | return proxy.invoke(REMOVE_LISTENER).thenApply(v -> null); |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 329 | } |
| 330 | return CompletableFuture.completedFuture(null); |
| 331 | } |
| 332 | |
| 333 | @Override |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 334 | public CompletableFuture<Map<String, Collection<byte[]>>> asMap() { |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 335 | throw new UnsupportedOperationException("Expensive operation."); |
| 336 | } |
| 337 | |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 338 | /** |
| 339 | * Helper to check if there was a lock based issue. |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 340 | * |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 341 | * @param status the status of an update result |
| 342 | */ |
| 343 | private void throwIfLocked(MapEntryUpdateResult.Status status) { |
| 344 | if (status == MapEntryUpdateResult.Status.WRITE_LOCK) { |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 345 | throw new ConcurrentModificationException("Cannot update map: " + |
Jordan Halterman | 5e88435 | 2018-05-21 22:11:07 -0700 | [diff] [blame] | 346 | "Another transaction " + |
| 347 | "in progress"); |
Aaron Kruglikov | a26f654 | 2016-04-19 13:37:42 -0700 | [diff] [blame] | 348 | } |
| 349 | } |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame] | 350 | |
| 351 | private boolean isListening() { |
| 352 | return !mapEventListeners.isEmpty(); |
| 353 | } |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 354 | } |