Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 1 | /* |
Brian O'Connor | 0a4e674 | 2016-09-15 23:03:10 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Laboratory |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -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 | |
| 19 | import com.google.common.base.Preconditions; |
| 20 | import com.google.common.collect.HashMultimap; |
| 21 | import com.google.common.collect.HashMultiset; |
Aaron Kruglikov | c0c27c0 | 2016-06-07 16:05:00 -0700 | [diff] [blame] | 22 | import com.google.common.collect.ImmutableSet; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 23 | import com.google.common.collect.Lists; |
| 24 | import com.google.common.collect.Maps; |
| 25 | import com.google.common.collect.Multiset; |
| 26 | import com.google.common.collect.Sets; |
| 27 | import io.atomix.copycat.server.Commit; |
| 28 | import io.atomix.copycat.server.Snapshottable; |
| 29 | import io.atomix.copycat.server.StateMachineExecutor; |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 30 | import io.atomix.copycat.server.session.ServerSession; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 31 | import io.atomix.copycat.server.session.SessionListener; |
| 32 | import io.atomix.copycat.server.storage.snapshot.SnapshotReader; |
| 33 | import io.atomix.copycat.server.storage.snapshot.SnapshotWriter; |
| 34 | import io.atomix.resource.ResourceStateMachine; |
| 35 | import org.onlab.util.CountDownCompleter; |
| 36 | import org.onlab.util.Match; |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 37 | import org.onosproject.store.service.MultimapEvent; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 38 | import org.onosproject.store.service.Versioned; |
| 39 | import org.slf4j.Logger; |
| 40 | |
| 41 | import java.util.Arrays; |
| 42 | import java.util.Collection; |
| 43 | import java.util.Comparator; |
| 44 | import java.util.EnumSet; |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 45 | import java.util.HashMap; |
| 46 | import java.util.List; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 47 | import java.util.Map; |
| 48 | import java.util.Properties; |
| 49 | import java.util.Set; |
| 50 | import java.util.TreeMap; |
| 51 | import java.util.concurrent.atomic.AtomicLong; |
| 52 | import java.util.function.BiConsumer; |
| 53 | import java.util.function.BinaryOperator; |
| 54 | import java.util.function.Function; |
| 55 | import java.util.function.Supplier; |
| 56 | import java.util.stream.Collector; |
| 57 | import java.util.stream.Collectors; |
| 58 | |
Aaron Kruglikov | a1801aa | 2016-07-12 15:17:30 -0700 | [diff] [blame] | 59 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Clear; |
| 60 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.ContainsEntry; |
| 61 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.ContainsKey; |
| 62 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.ContainsValue; |
| 63 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Entries; |
| 64 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Get; |
| 65 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.IsEmpty; |
| 66 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.KeySet; |
| 67 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Keys; |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 68 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Listen; |
Aaron Kruglikov | a1801aa | 2016-07-12 15:17:30 -0700 | [diff] [blame] | 69 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.MultiRemove; |
| 70 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.MultimapCommand; |
| 71 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Put; |
| 72 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.RemoveAll; |
| 73 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Replace; |
| 74 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Size; |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 75 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Unlisten; |
Aaron Kruglikov | a1801aa | 2016-07-12 15:17:30 -0700 | [diff] [blame] | 76 | import static org.onosproject.store.primitives.resources.impl.AtomixConsistentMultimapCommands.Values; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 77 | import static org.slf4j.LoggerFactory.getLogger; |
| 78 | |
| 79 | /** |
Aaron Kruglikov | a1801aa | 2016-07-12 15:17:30 -0700 | [diff] [blame] | 80 | * State Machine for {@link AtomixConsistentSetMultimap} resource. |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 81 | */ |
Aaron Kruglikov | a1801aa | 2016-07-12 15:17:30 -0700 | [diff] [blame] | 82 | public class AtomixConsistentSetMultimapState extends ResourceStateMachine |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 83 | implements SessionListener, Snapshottable { |
| 84 | |
| 85 | private final Logger log = getLogger(getClass()); |
| 86 | private final AtomicLong globalVersion = new AtomicLong(1); |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 87 | private final Map<Long, Commit<? extends Listen>> listeners = new HashMap<>(); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 88 | private final Map<String, MapEntryValue> backingMap = Maps.newHashMap(); |
| 89 | |
Aaron Kruglikov | a1801aa | 2016-07-12 15:17:30 -0700 | [diff] [blame] | 90 | public AtomixConsistentSetMultimapState(Properties properties) { |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 91 | super(properties); |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | public void snapshot(SnapshotWriter writer) { |
| 96 | } |
| 97 | |
| 98 | @Override |
| 99 | public void install(SnapshotReader reader) { |
| 100 | } |
| 101 | |
| 102 | @Override |
| 103 | protected void configure(StateMachineExecutor executor) { |
| 104 | executor.register(Size.class, this::size); |
| 105 | executor.register(IsEmpty.class, this::isEmpty); |
| 106 | executor.register(ContainsKey.class, this::containsKey); |
| 107 | executor.register(ContainsValue.class, this::containsValue); |
| 108 | executor.register(ContainsEntry.class, this::containsEntry); |
| 109 | executor.register(Clear.class, this::clear); |
| 110 | executor.register(KeySet.class, this::keySet); |
| 111 | executor.register(Keys.class, this::keys); |
| 112 | executor.register(Values.class, this::values); |
| 113 | executor.register(Entries.class, this::entries); |
| 114 | executor.register(Get.class, this::get); |
| 115 | executor.register(RemoveAll.class, this::removeAll); |
| 116 | executor.register(MultiRemove.class, this::multiRemove); |
| 117 | executor.register(Put.class, this::put); |
| 118 | executor.register(Replace.class, this::replace); |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 119 | executor.register(Listen.class, this::listen); |
| 120 | executor.register(Unlisten.class, this::unlisten); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 121 | } |
| 122 | |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 123 | /** |
| 124 | * Handles a Size commit. |
| 125 | * |
| 126 | * @param commit Size commit |
| 127 | * @return number of unique key value pairs in the multimap |
| 128 | */ |
| 129 | protected int size(Commit<? extends Size> commit) { |
| 130 | try { |
| 131 | return backingMap.values() |
| 132 | .stream() |
| 133 | .map(valueCollection -> valueCollection.values().size()) |
| 134 | .collect(Collectors.summingInt(size -> size)); |
| 135 | } finally { |
| 136 | commit.close(); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Handles an IsEmpty commit. |
| 142 | * |
| 143 | * @param commit IsEmpty commit |
| 144 | * @return true if the multimap contains no key-value pairs, else false |
| 145 | */ |
| 146 | protected boolean isEmpty(Commit<? extends IsEmpty> commit) { |
| 147 | try { |
| 148 | return backingMap.isEmpty(); |
| 149 | } finally { |
| 150 | commit.close(); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Handles a contains key commit. |
| 156 | * |
| 157 | * @param commit ContainsKey commit |
| 158 | * @return returns true if the key is in the multimap, else false |
| 159 | */ |
| 160 | protected boolean containsKey(Commit<? extends ContainsKey> commit) { |
| 161 | try { |
| 162 | return backingMap.containsKey(commit.operation().key()); |
| 163 | } finally { |
| 164 | commit.close(); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Handles a ContainsValue commit. |
| 170 | * |
| 171 | * @param commit ContainsValue commit |
| 172 | * @return true if the value is in the multimap, else false |
| 173 | */ |
| 174 | protected boolean containsValue(Commit<? extends ContainsValue> commit) { |
| 175 | try { |
Aaron Kruglikov | c0c27c0 | 2016-06-07 16:05:00 -0700 | [diff] [blame] | 176 | if (backingMap.values().isEmpty()) { |
| 177 | return false; |
| 178 | } |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 179 | Match<byte[]> match = Match.ifValue(commit.operation().value()); |
| 180 | return backingMap |
| 181 | .values() |
| 182 | .stream() |
| 183 | .anyMatch(valueList -> |
Aaron Kruglikov | c0c27c0 | 2016-06-07 16:05:00 -0700 | [diff] [blame] | 184 | valueList |
| 185 | .values() |
| 186 | .stream() |
| 187 | .anyMatch(byteValue -> |
| 188 | match.matches(byteValue))); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 189 | } finally { |
| 190 | commit.close(); |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * Handles a ContainsEntry commit. |
| 196 | * |
| 197 | * @param commit ContainsEntry commit |
| 198 | * @return true if the key-value pair exists, else false |
| 199 | */ |
| 200 | protected boolean containsEntry(Commit<? extends ContainsEntry> commit) { |
| 201 | try { |
| 202 | MapEntryValue entryValue = |
| 203 | backingMap.get(commit.operation().key()); |
| 204 | if (entryValue == null) { |
| 205 | return false; |
| 206 | } else { |
| 207 | Match valueMatch = Match.ifValue(commit.operation().value()); |
| 208 | return entryValue |
| 209 | .values() |
| 210 | .stream() |
| 211 | .anyMatch(byteValue -> valueMatch.matches(byteValue)); |
| 212 | } |
| 213 | } finally { |
| 214 | commit.close(); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * Handles a Clear commit. |
| 220 | * |
| 221 | * @param commit Clear commit |
| 222 | */ |
| 223 | protected void clear(Commit<? extends Clear> commit) { |
| 224 | try { |
| 225 | backingMap.clear(); |
| 226 | } finally { |
| 227 | commit.close(); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Handles a KeySet commit. |
| 233 | * |
| 234 | * @param commit KeySet commit |
| 235 | * @return a set of all keys in the multimap |
| 236 | */ |
| 237 | protected Set<String> keySet(Commit<? extends KeySet> commit) { |
| 238 | try { |
Aaron Kruglikov | c0c27c0 | 2016-06-07 16:05:00 -0700 | [diff] [blame] | 239 | return ImmutableSet.copyOf(backingMap.keySet()); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 240 | } finally { |
| 241 | commit.close(); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | /** |
| 246 | * Handles a Keys commit. |
| 247 | * |
| 248 | * @param commit Keys commit |
| 249 | * @return a multiset of keys with each key included an equal number of |
| 250 | * times to the total key-value pairs in which that key participates |
| 251 | */ |
| 252 | protected Multiset<String> keys(Commit<? extends Keys> commit) { |
| 253 | try { |
| 254 | Multiset keys = HashMultiset.create(); |
| 255 | backingMap.forEach((key, mapEntryValue) -> { |
| 256 | keys.add(key, mapEntryValue.values().size()); |
| 257 | }); |
| 258 | return keys; |
| 259 | } finally { |
| 260 | commit.close(); |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * Handles a Values commit. |
| 266 | * |
| 267 | * @param commit Values commit |
| 268 | * @return the set of values in the multimap with duplicates included |
| 269 | */ |
| 270 | protected Multiset<byte[]> values(Commit<? extends Values> commit) { |
| 271 | try { |
| 272 | return backingMap |
| 273 | .values() |
| 274 | .stream() |
| 275 | .collect(new HashMultisetValueCollector()); |
| 276 | } finally { |
| 277 | commit.close(); |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | /** |
| 282 | * Handles an Entries commit. |
| 283 | * |
| 284 | * @param commit Entries commit |
| 285 | * @return a set of all key-value pairs in the multimap |
| 286 | */ |
| 287 | protected Collection<Map.Entry<String, byte[]>> entries( |
| 288 | Commit<? extends Entries> commit) { |
| 289 | try { |
| 290 | return backingMap |
| 291 | .entrySet() |
| 292 | .stream() |
| 293 | .collect(new EntrySetCollector()); |
| 294 | } finally { |
| 295 | commit.close(); |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * Handles a Get commit. |
| 301 | * |
| 302 | * @param commit Get commit |
| 303 | * @return the collection of values associated with the key or an empty |
| 304 | * list if none exist |
| 305 | */ |
| 306 | protected Versioned<Collection<? extends byte[]>> get( |
| 307 | Commit<? extends Get> commit) { |
| 308 | try { |
| 309 | MapEntryValue mapEntryValue = backingMap.get(commit.operation().key()); |
| 310 | return toVersioned(backingMap.get(commit.operation().key())); |
| 311 | } finally { |
| 312 | commit.close(); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * Handles a removeAll commit, and returns the previous mapping. |
| 318 | * |
| 319 | * @param commit removeAll commit |
| 320 | * @return collection of removed values |
| 321 | */ |
| 322 | protected Versioned<Collection<? extends byte[]>> removeAll( |
| 323 | Commit<? extends RemoveAll> commit) { |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 324 | String key = commit.operation().key(); |
| 325 | |
| 326 | if (!backingMap.containsKey(key)) { |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 327 | commit.close(); |
| 328 | return new Versioned<>(Sets.newHashSet(), -1); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 329 | } |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 330 | |
| 331 | Versioned<Collection<? extends byte[]>> removedValues = |
| 332 | backingMap.get(key).addCommit(commit); |
| 333 | publish(removedValues.value().stream() |
| 334 | .map(value -> new MultimapEvent<String, byte[]>( |
| 335 | "", key, null, value)) |
| 336 | .collect(Collectors.toList())); |
| 337 | return removedValues; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | /** |
| 341 | * Handles a multiRemove commit, returns true if the remove results in any |
| 342 | * change. |
| 343 | * @param commit multiRemove commit |
| 344 | * @return true if any change results, else false |
| 345 | */ |
| 346 | protected boolean multiRemove(Commit<? extends MultiRemove> commit) { |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 347 | String key = commit.operation().key(); |
| 348 | |
| 349 | if (!backingMap.containsKey(key)) { |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 350 | commit.close(); |
| 351 | return false; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 352 | } |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 353 | |
| 354 | Versioned<Collection<? extends byte[]>> removedValues = backingMap |
| 355 | .get(key) |
| 356 | .addCommit(commit); |
| 357 | |
| 358 | if (removedValues != null) { |
| 359 | publish(removedValues.value().stream() |
| 360 | .map(value -> new MultimapEvent<String, byte[]>( |
| 361 | "", key, null, value)) |
| 362 | .collect(Collectors.toList())); |
| 363 | return true; |
| 364 | } |
| 365 | |
| 366 | return false; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | /** |
| 370 | * Handles a put commit, returns true if any change results from this |
| 371 | * commit. |
| 372 | * @param commit a put commit |
| 373 | * @return true if this commit results in a change, else false |
| 374 | */ |
| 375 | protected boolean put(Commit<? extends Put> commit) { |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 376 | String key = commit.operation().key(); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 377 | if (commit.operation().values().isEmpty()) { |
| 378 | return false; |
| 379 | } |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 380 | if (!backingMap.containsKey(key)) { |
| 381 | backingMap.put(key, new NonTransactionalCommit(1)); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 382 | } |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 383 | |
| 384 | Versioned<Collection<? extends byte[]>> addedValues = backingMap |
| 385 | .get(key) |
| 386 | .addCommit(commit); |
| 387 | |
| 388 | if (addedValues != null) { |
| 389 | publish(addedValues.value().stream() |
| 390 | .map(value -> new MultimapEvent<String, byte[]>( |
| 391 | "", key, value, null)) |
| 392 | .collect(Collectors.toList())); |
| 393 | return true; |
| 394 | } |
| 395 | |
| 396 | return false; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | protected Versioned<Collection<? extends byte[]>> replace( |
| 400 | Commit<? extends Replace> commit) { |
| 401 | if (!backingMap.containsKey(commit.operation().key())) { |
| 402 | backingMap.put(commit.operation().key(), |
| 403 | new NonTransactionalCommit(1)); |
| 404 | } |
| 405 | return backingMap.get(commit.operation().key()).addCommit(commit); |
| 406 | } |
| 407 | |
Jonathan Hart | 46bf89b | 2017-02-27 15:56:42 -0800 | [diff] [blame^] | 408 | /** |
| 409 | * Handles a listen commit. |
| 410 | * |
| 411 | * @param commit listen commit |
| 412 | */ |
| 413 | protected void listen(Commit<? extends Listen> commit) { |
| 414 | Long sessionId = commit.session().id(); |
| 415 | if (listeners.putIfAbsent(sessionId, commit) != null) { |
| 416 | commit.close(); |
| 417 | return; |
| 418 | } |
| 419 | commit.session() |
| 420 | .onStateChange( |
| 421 | state -> { |
| 422 | if (state == ServerSession.State.CLOSED |
| 423 | || state == ServerSession.State.EXPIRED) { |
| 424 | Commit<? extends Listen> listener = listeners.remove(sessionId); |
| 425 | if (listener != null) { |
| 426 | listener.close(); |
| 427 | } |
| 428 | } |
| 429 | }); |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * Handles an unlisten commit. |
| 434 | * |
| 435 | * @param commit unlisten commit |
| 436 | */ |
| 437 | protected void unlisten(Commit<? extends Unlisten> commit) { |
| 438 | try { |
| 439 | Commit<? extends Listen> listener = listeners.remove(commit.session().id()); |
| 440 | if (listener != null) { |
| 441 | listener.close(); |
| 442 | } |
| 443 | } finally { |
| 444 | commit.close(); |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | /** |
| 449 | * Publishes events to listeners. |
| 450 | * |
| 451 | * @param events list of map event to publish |
| 452 | */ |
| 453 | private void publish(List<MultimapEvent<String, byte[]>> events) { |
| 454 | listeners.values().forEach(commit -> |
| 455 | commit.session().publish(AtomixConsistentSetMultimap.CHANGE_SUBJECT, events)); |
| 456 | } |
| 457 | |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 458 | private interface MapEntryValue { |
| 459 | |
| 460 | /** |
| 461 | * Returns the list of raw {@code byte[]'s}. |
| 462 | * |
| 463 | * @return list of raw values |
| 464 | */ |
| 465 | Collection<? extends byte[]> values(); |
| 466 | |
| 467 | /** |
| 468 | * Returns the version of the value. |
| 469 | * |
| 470 | * @return version |
| 471 | */ |
| 472 | long version(); |
| 473 | |
| 474 | /** |
| 475 | * Discards the value by invoke appropriate clean up actions. |
| 476 | */ |
| 477 | void discard(); |
| 478 | |
| 479 | /** |
| 480 | * Add a new commit and modifies the set of values accordingly. |
| 481 | * In the case of a replace or removeAll it returns the set of removed |
| 482 | * values. In the case of put or multiRemove it returns null for no |
| 483 | * change and a set of the added or removed values respectively if a |
| 484 | * change resulted. |
| 485 | * |
| 486 | * @param commit the commit to be added |
| 487 | */ |
| 488 | Versioned<Collection<? extends byte[]>> addCommit( |
| 489 | Commit<? extends MultimapCommand> commit); |
| 490 | } |
| 491 | |
| 492 | private class NonTransactionalCommit implements MapEntryValue { |
| 493 | private long version; |
| 494 | private final TreeMap<byte[], CountDownCompleter<Commit>> |
| 495 | valueCountdownMap = Maps.newTreeMap(new ByteArrayComparator()); |
| 496 | /*This is a mapping of commits that added values to the commits |
| 497 | * removing those values, they will not be circular because keys will |
| 498 | * be exclusively Put and Replace commits and values will be exclusively |
| 499 | * Multiremove commits, each time a Put or replace is removed it should |
| 500 | * as part of closing go through and countdown each of the remove |
| 501 | * commits depending on it.*/ |
| 502 | private final HashMultimap<Commit, CountDownCompleter<Commit>> |
| 503 | additiveToRemovalCommits = HashMultimap.create(); |
| 504 | |
| 505 | public NonTransactionalCommit( |
| 506 | long version) { |
| 507 | //Set the version to current it will only be updated once this is |
| 508 | // populated |
| 509 | this.version = globalVersion.get(); |
| 510 | } |
| 511 | |
| 512 | @Override |
| 513 | public Collection<? extends byte[]> values() { |
Aaron Kruglikov | c0c27c0 | 2016-06-07 16:05:00 -0700 | [diff] [blame] | 514 | return ImmutableSet.copyOf(valueCountdownMap.keySet()); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | @Override |
| 518 | public long version() { |
| 519 | return version; |
| 520 | } |
| 521 | |
| 522 | @Override |
| 523 | public void discard() { |
| 524 | valueCountdownMap.values().forEach(completer -> |
| 525 | completer.object().close()); |
| 526 | } |
| 527 | |
| 528 | @Override |
| 529 | public Versioned<Collection<? extends byte[]>> addCommit( |
| 530 | Commit<? extends MultimapCommand> commit) { |
| 531 | Preconditions.checkNotNull(commit); |
| 532 | Preconditions.checkNotNull(commit.operation()); |
| 533 | Versioned<Collection<? extends byte[]>> retVersion; |
| 534 | |
| 535 | if (commit.operation() instanceof Put) { |
| 536 | //Using a treeset here sanitizes the input, removing duplicates |
| 537 | Set<byte[]> valuesToAdd = |
| 538 | Sets.newTreeSet(new ByteArrayComparator()); |
| 539 | ((Put) commit.operation()).values().forEach(value -> { |
| 540 | if (!valueCountdownMap.containsKey(value)) { |
| 541 | valuesToAdd.add(value); |
| 542 | } |
| 543 | }); |
| 544 | if (valuesToAdd.isEmpty()) { |
| 545 | //Do not increment or add the commit if no change resulted |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 546 | commit.close(); |
| 547 | return null; |
| 548 | } |
| 549 | //When all values from a commit have been removed decrement all |
| 550 | //removal commits relying on it and remove itself from the |
| 551 | //mapping of additive commits to the commits removing the |
| 552 | //values it added. (Only multiremoves will be dependent) |
| 553 | CountDownCompleter<Commit> completer = |
| 554 | new CountDownCompleter<>(commit, valuesToAdd.size(), |
| 555 | c -> { |
| 556 | if (additiveToRemovalCommits.containsKey(c)) { |
| 557 | additiveToRemovalCommits. |
| 558 | get(c). |
| 559 | forEach(countdown -> |
| 560 | countdown.countDown()); |
| 561 | additiveToRemovalCommits.removeAll(c); |
| 562 | } |
| 563 | c.close(); |
| 564 | }); |
| 565 | retVersion = new Versioned<>(valuesToAdd, version); |
| 566 | valuesToAdd.forEach(value -> valueCountdownMap.put(value, |
| 567 | completer)); |
| 568 | version++; |
| 569 | return retVersion; |
| 570 | |
| 571 | } else if (commit.operation() instanceof Replace) { |
| 572 | //Will this work?? Need to check before check-in! |
| 573 | Set<byte[]> removedValues = Sets.newHashSet(); |
| 574 | removedValues.addAll(valueCountdownMap.keySet()); |
| 575 | retVersion = new Versioned<>(removedValues, version); |
| 576 | valueCountdownMap.values().forEach(countdown -> |
| 577 | countdown.countDown()); |
| 578 | valueCountdownMap.clear(); |
| 579 | Set<byte[]> valuesToAdd = |
| 580 | Sets.newTreeSet(new ByteArrayComparator()); |
| 581 | ((Replace) commit.operation()).values().forEach(value -> { |
| 582 | valuesToAdd.add(value); |
| 583 | }); |
| 584 | if (valuesToAdd.isEmpty()) { |
| 585 | version = globalVersion.incrementAndGet(); |
| 586 | backingMap.remove(((Replace) commit.operation()).key()); |
| 587 | //Order is important here, the commit must be closed last |
| 588 | //(or minimally after all uses) |
| 589 | commit.close(); |
| 590 | return retVersion; |
| 591 | } |
| 592 | CountDownCompleter<Commit> completer = |
| 593 | new CountDownCompleter<>(commit, valuesToAdd.size(), |
| 594 | c -> { |
| 595 | if (additiveToRemovalCommits |
| 596 | .containsKey(c)) { |
| 597 | additiveToRemovalCommits. |
| 598 | get(c). |
| 599 | forEach(countdown -> |
| 600 | countdown.countDown()); |
| 601 | additiveToRemovalCommits. |
| 602 | removeAll(c); |
| 603 | } |
| 604 | c.close(); |
| 605 | }); |
| 606 | valuesToAdd.forEach(value -> |
| 607 | valueCountdownMap.put(value, completer)); |
| 608 | version = globalVersion.incrementAndGet(); |
| 609 | return retVersion; |
| 610 | |
| 611 | } else if (commit.operation() instanceof RemoveAll) { |
| 612 | Set<byte[]> removed = Sets.newHashSet(); |
| 613 | //We can assume here that values only appear once and so we |
| 614 | //do not need to sanitize the return for duplicates. |
| 615 | removed.addAll(valueCountdownMap.keySet()); |
| 616 | retVersion = new Versioned<>(removed, version); |
| 617 | valueCountdownMap.values().forEach(countdown -> |
| 618 | countdown.countDown()); |
| 619 | valueCountdownMap.clear(); |
| 620 | //In the case of a removeAll all commits will be removed and |
| 621 | //unlike the multiRemove case we do not need to consider |
| 622 | //dependencies among additive and removal commits. |
| 623 | |
| 624 | //Save the key for use after the commit is closed |
| 625 | String key = ((RemoveAll) commit.operation()).key(); |
| 626 | commit.close(); |
| 627 | version = globalVersion.incrementAndGet(); |
| 628 | backingMap.remove(key); |
| 629 | return retVersion; |
| 630 | |
| 631 | } else if (commit.operation() instanceof MultiRemove) { |
| 632 | //Must first calculate how many commits the removal depends on. |
| 633 | //At this time we also sanitize the removal set by adding to a |
| 634 | //set with proper handling of byte[] equality. |
| 635 | Set<byte[]> removed = Sets.newHashSet(); |
| 636 | Set<Commit> commitsRemovedFrom = Sets.newHashSet(); |
| 637 | ((MultiRemove) commit.operation()).values().forEach(value -> { |
| 638 | if (valueCountdownMap.containsKey(value)) { |
| 639 | removed.add(value); |
| 640 | commitsRemovedFrom |
| 641 | .add(valueCountdownMap.get(value).object()); |
| 642 | } |
| 643 | }); |
| 644 | //If there is nothing to be removed no action should be taken. |
| 645 | if (removed.isEmpty()) { |
| 646 | //Do not increment or add the commit if no change resulted |
| 647 | commit.close(); |
| 648 | return null; |
| 649 | } |
| 650 | //When all additive commits this depends on are closed this can |
| 651 | //be closed as well. |
| 652 | CountDownCompleter<Commit> completer = |
| 653 | new CountDownCompleter<>(commit, |
| 654 | commitsRemovedFrom.size(), |
| 655 | c -> c.close()); |
| 656 | commitsRemovedFrom.forEach(commitRemovedFrom -> { |
| 657 | additiveToRemovalCommits.put(commitRemovedFrom, completer); |
| 658 | }); |
| 659 | //Save key in case countdown results in closing the commit. |
| 660 | String removedKey = ((MultiRemove) commit.operation()).key(); |
| 661 | removed.forEach(removedValue -> { |
| 662 | valueCountdownMap.remove(removedValue).countDown(); |
| 663 | }); |
| 664 | //The version is updated locally as well as globally even if |
| 665 | //this object will be removed from the map in case any other |
| 666 | //party still holds a reference to this object. |
| 667 | retVersion = new Versioned<>(removed, version); |
| 668 | version = globalVersion.incrementAndGet(); |
| 669 | if (valueCountdownMap.isEmpty()) { |
| 670 | backingMap |
| 671 | .remove(removedKey); |
| 672 | } |
| 673 | return retVersion; |
| 674 | |
| 675 | } else { |
| 676 | throw new IllegalArgumentException(); |
| 677 | } |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | /** |
| 682 | * A collector that creates MapEntryValues and creates a multiset of all |
| 683 | * values in the map an equal number of times to the number of sets in |
| 684 | * which they participate. |
| 685 | */ |
| 686 | private class HashMultisetValueCollector implements |
| 687 | Collector<MapEntryValue, |
| 688 | HashMultiset<byte[]>, |
| 689 | HashMultiset<byte[]>> { |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 690 | |
| 691 | @Override |
| 692 | public Supplier<HashMultiset<byte[]>> supplier() { |
Jonathan Hart | ad0c302 | 2017-02-22 14:06:01 -0800 | [diff] [blame] | 693 | return HashMultiset::create; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | @Override |
| 697 | public BiConsumer<HashMultiset<byte[]>, MapEntryValue> accumulator() { |
| 698 | return (multiset, mapEntryValue) -> |
| 699 | multiset.addAll(mapEntryValue.values()); |
| 700 | } |
| 701 | |
| 702 | @Override |
| 703 | public BinaryOperator<HashMultiset<byte[]>> combiner() { |
| 704 | return (setOne, setTwo) -> { |
| 705 | setOne.addAll(setTwo); |
| 706 | return setOne; |
| 707 | }; |
| 708 | } |
| 709 | |
| 710 | @Override |
| 711 | public Function<HashMultiset<byte[]>, |
| 712 | HashMultiset<byte[]>> finisher() { |
Jonathan Hart | ad0c302 | 2017-02-22 14:06:01 -0800 | [diff] [blame] | 713 | return Function.identity(); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 714 | } |
| 715 | |
| 716 | @Override |
| 717 | public Set<Characteristics> characteristics() { |
| 718 | return EnumSet.of(Characteristics.UNORDERED); |
| 719 | } |
| 720 | } |
| 721 | |
| 722 | /** |
| 723 | * A collector that creates Entries of {@code <String, MapEntryValue>} and |
| 724 | * creates a set of entries all key value pairs in the map. |
| 725 | */ |
| 726 | private class EntrySetCollector implements |
| 727 | Collector<Map.Entry<String, MapEntryValue>, |
| 728 | Set<Map.Entry<String, byte[]>>, |
| 729 | Set<Map.Entry<String, byte[]>>> { |
| 730 | private Set<Map.Entry<String, byte[]>> set = null; |
| 731 | |
| 732 | @Override |
| 733 | public Supplier<Set<Map.Entry<String, byte[]>>> supplier() { |
Sho SHIMIZU | 99e90cd | 2016-08-12 15:55:16 -0700 | [diff] [blame] | 734 | return () -> { |
| 735 | if (set == null) { |
| 736 | set = Sets.newHashSet(); |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 737 | } |
Sho SHIMIZU | 99e90cd | 2016-08-12 15:55:16 -0700 | [diff] [blame] | 738 | return set; |
Aaron Kruglikov | 44a1fef | 2016-04-27 11:29:23 -0700 | [diff] [blame] | 739 | }; |
| 740 | } |
| 741 | |
| 742 | @Override |
| 743 | public BiConsumer<Set<Map.Entry<String, byte[]>>, |
| 744 | Map.Entry<String, MapEntryValue>> accumulator() { |
| 745 | return (set, entry) -> { |
| 746 | entry |
| 747 | .getValue() |
| 748 | .values() |
| 749 | .forEach(byteValue -> |
| 750 | set.add(Maps.immutableEntry(entry.getKey(), |
| 751 | byteValue))); |
| 752 | }; |
| 753 | } |
| 754 | |
| 755 | @Override |
| 756 | public BinaryOperator<Set<Map.Entry<String, byte[]>>> combiner() { |
| 757 | return (setOne, setTwo) -> { |
| 758 | setOne.addAll(setTwo); |
| 759 | return setOne; |
| 760 | }; |
| 761 | } |
| 762 | |
| 763 | @Override |
| 764 | public Function<Set<Map.Entry<String, byte[]>>, |
| 765 | Set<Map.Entry<String, byte[]>>> finisher() { |
| 766 | return (unused) -> set; |
| 767 | } |
| 768 | |
| 769 | @Override |
| 770 | public Set<Characteristics> characteristics() { |
| 771 | return EnumSet.of(Characteristics.UNORDERED); |
| 772 | } |
| 773 | } |
| 774 | /** |
| 775 | * Utility for turning a {@code MapEntryValue} to {@code Versioned}. |
| 776 | * @param value map entry value |
| 777 | * @return versioned instance or an empty list versioned -1 if argument is |
| 778 | * null |
| 779 | */ |
| 780 | private Versioned<Collection<? extends byte[]>> toVersioned( |
| 781 | MapEntryValue value) { |
| 782 | return value == null ? new Versioned<>(Lists.newArrayList(), -1) : |
| 783 | new Versioned<>(value.values(), |
| 784 | value.version()); |
| 785 | } |
| 786 | |
| 787 | private class ByteArrayComparator implements Comparator<byte[]> { |
| 788 | |
| 789 | @Override |
| 790 | public int compare(byte[] o1, byte[] o2) { |
| 791 | if (Arrays.equals(o1, o2)) { |
| 792 | return 0; |
| 793 | } else { |
| 794 | for (int i = 0; i < o1.length && i < o2.length; i++) { |
| 795 | if (o1[i] < o2[i]) { |
| 796 | return -1; |
| 797 | } else if (o1[i] > o2[i]) { |
| 798 | return 1; |
| 799 | } |
| 800 | } |
| 801 | return o1.length > o2.length ? 1 : -1; |
| 802 | } |
| 803 | } |
| 804 | } |
Aaron Kruglikov | c0c27c0 | 2016-06-07 16:05:00 -0700 | [diff] [blame] | 805 | } |