Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 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.primitives.resources.impl; |
| 17 | |
| 18 | import static org.onosproject.store.service.MapEvent.Type.INSERT; |
| 19 | import static org.onosproject.store.service.MapEvent.Type.REMOVE; |
| 20 | import static org.onosproject.store.service.MapEvent.Type.UPDATE; |
| 21 | import io.atomix.copycat.client.session.Session; |
| 22 | import io.atomix.copycat.server.Commit; |
| 23 | import io.atomix.copycat.server.Snapshottable; |
| 24 | import io.atomix.copycat.server.StateMachineExecutor; |
| 25 | import io.atomix.copycat.server.session.SessionListener; |
| 26 | import io.atomix.copycat.server.storage.snapshot.SnapshotReader; |
| 27 | import io.atomix.copycat.server.storage.snapshot.SnapshotWriter; |
| 28 | import io.atomix.resource.ResourceStateMachine; |
Madan Jampani | 86cb243 | 2016-02-17 11:07:56 -0800 | [diff] [blame] | 29 | import io.atomix.resource.ResourceType; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 30 | |
| 31 | import java.util.Collection; |
| 32 | import java.util.HashMap; |
| 33 | import java.util.Iterator; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 34 | import java.util.List; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 35 | import java.util.Map; |
| 36 | import java.util.Set; |
| 37 | import java.util.concurrent.atomic.AtomicLong; |
| 38 | import java.util.stream.Collectors; |
| 39 | |
| 40 | import org.onlab.util.CountDownCompleter; |
| 41 | import org.onlab.util.Match; |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 42 | import org.onosproject.store.primitives.MapUpdate; |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 43 | import org.onosproject.store.primitives.TransactionId; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 44 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Clear; |
| 45 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.ContainsKey; |
| 46 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.ContainsValue; |
| 47 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.EntrySet; |
| 48 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Get; |
| 49 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.IsEmpty; |
| 50 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.KeySet; |
| 51 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Listen; |
| 52 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Size; |
| 53 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionCommit; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 54 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionPrepare; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 55 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionRollback; |
| 56 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Unlisten; |
| 57 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.UpdateAndGet; |
| 58 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Values; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 59 | import org.onosproject.store.service.MapEvent; |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 60 | import org.onosproject.store.service.MapTransaction; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 61 | import org.onosproject.store.service.Versioned; |
| 62 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 63 | import com.google.common.collect.Lists; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 64 | import com.google.common.collect.Maps; |
| 65 | import com.google.common.collect.Sets; |
| 66 | |
| 67 | import static com.google.common.base.Preconditions.checkState; |
| 68 | |
| 69 | /** |
| 70 | * State Machine for {@link AtomixConsistentMap} resource. |
| 71 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 72 | public class AtomixConsistentMapState extends ResourceStateMachine implements SessionListener, Snapshottable { |
Madan Jampani | 86cb243 | 2016-02-17 11:07:56 -0800 | [diff] [blame] | 73 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 74 | private final Map<Long, Commit<? extends AtomixConsistentMapCommands.Listen>> listeners = new HashMap<>(); |
| 75 | private final Map<String, MapEntryValue> mapEntries = new HashMap<>(); |
| 76 | private final Set<String> preparedKeys = Sets.newHashSet(); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 77 | private final Map<TransactionId, Commit<? extends TransactionPrepare>> pendingTransactions = Maps.newHashMap(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 78 | private AtomicLong versionCounter = new AtomicLong(0); |
| 79 | |
Madan Jampani | 86cb243 | 2016-02-17 11:07:56 -0800 | [diff] [blame] | 80 | public AtomixConsistentMapState() { |
| 81 | super(new ResourceType(AtomixConsistentMap.class)); |
| 82 | } |
| 83 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 84 | @Override |
| 85 | public void snapshot(SnapshotWriter writer) { |
| 86 | writer.writeLong(versionCounter.get()); |
| 87 | } |
| 88 | |
| 89 | @Override |
| 90 | public void install(SnapshotReader reader) { |
| 91 | versionCounter = new AtomicLong(reader.readLong()); |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | protected void configure(StateMachineExecutor executor) { |
| 96 | // Listeners |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 97 | executor.register(Listen.class, this::listen); |
| 98 | executor.register(Unlisten.class, this::unlisten); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 99 | // Queries |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 100 | executor.register(ContainsKey.class, this::containsKey); |
| 101 | executor.register(ContainsValue.class, this::containsValue); |
| 102 | executor.register(EntrySet.class, this::entrySet); |
| 103 | executor.register(Get.class, this::get); |
| 104 | executor.register(IsEmpty.class, this::isEmpty); |
| 105 | executor.register(KeySet.class, this::keySet); |
| 106 | executor.register(Size.class, this::size); |
| 107 | executor.register(Values.class, this::values); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 108 | // Commands |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 109 | executor.register(UpdateAndGet.class, this::updateAndGet); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 110 | executor.register(AtomixConsistentMapCommands.Clear.class, this::clear); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 111 | executor.register(TransactionPrepare.class, this::prepare); |
| 112 | executor.register(TransactionCommit.class, this::commit); |
| 113 | executor.register(TransactionRollback.class, this::rollback); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | @Override |
| 117 | public void delete() { |
| 118 | // Delete Listeners |
| 119 | listeners.values().forEach(Commit::close); |
| 120 | listeners.clear(); |
| 121 | |
| 122 | // Delete Map entries |
| 123 | mapEntries.values().forEach(MapEntryValue::discard); |
| 124 | mapEntries.clear(); |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Handles a contains key commit. |
| 129 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 130 | * @param commit containsKey commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 131 | * @return {@code true} if map contains key |
| 132 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 133 | protected boolean containsKey(Commit<? extends ContainsKey> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 134 | try { |
| 135 | return toVersioned(mapEntries.get(commit.operation().key())) != null; |
| 136 | } finally { |
| 137 | commit.close(); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * Handles a contains value commit. |
| 143 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 144 | * @param commit containsValue commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 145 | * @return {@code true} if map contains value |
| 146 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 147 | protected boolean containsValue(Commit<? extends ContainsValue> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 148 | try { |
| 149 | Match<byte[]> valueMatch = Match |
| 150 | .ifValue(commit.operation().value()); |
| 151 | return mapEntries.values().stream() |
| 152 | .anyMatch(value -> valueMatch.matches(value.value())); |
| 153 | } finally { |
| 154 | commit.close(); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * Handles a get commit. |
| 160 | * |
| 161 | * @param commit |
| 162 | * get commit |
| 163 | * @return value mapped to key |
| 164 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 165 | protected Versioned<byte[]> get(Commit<? extends Get> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 166 | try { |
| 167 | return toVersioned(mapEntries.get(commit.operation().key())); |
| 168 | } finally { |
| 169 | commit.close(); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * Handles a count commit. |
| 175 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 176 | * @param commit size commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 177 | * @return number of entries in map |
| 178 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 179 | protected int size(Commit<? extends Size> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 180 | try { |
| 181 | return mapEntries.size(); |
| 182 | } finally { |
| 183 | commit.close(); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Handles an is empty commit. |
| 189 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 190 | * @param commit isEmpty commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 191 | * @return {@code true} if map is empty |
| 192 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 193 | protected boolean isEmpty(Commit<? extends IsEmpty> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 194 | try { |
| 195 | return mapEntries.isEmpty(); |
| 196 | } finally { |
| 197 | commit.close(); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * Handles a keySet commit. |
| 203 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 204 | * @param commit keySet commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 205 | * @return set of keys in map |
| 206 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 207 | protected Set<String> keySet(Commit<? extends KeySet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 208 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 209 | return mapEntries.keySet().stream().collect(Collectors.toSet()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 210 | } finally { |
| 211 | commit.close(); |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Handles a values commit. |
| 217 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 218 | * @param commit values commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 219 | * @return collection of values in map |
| 220 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 221 | protected Collection<Versioned<byte[]>> values(Commit<? extends Values> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 222 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 223 | return mapEntries.values().stream().map(this::toVersioned).collect(Collectors.toList()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 224 | } finally { |
| 225 | commit.close(); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Handles a entry set commit. |
| 231 | * |
| 232 | * @param commit |
| 233 | * entrySet commit |
| 234 | * @return set of map entries |
| 235 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 236 | protected Set<Map.Entry<String, Versioned<byte[]>>> entrySet(Commit<? extends EntrySet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 237 | try { |
| 238 | return mapEntries |
| 239 | .entrySet() |
| 240 | .stream() |
| 241 | .map(e -> Maps.immutableEntry(e.getKey(), |
| 242 | toVersioned(e.getValue()))) |
| 243 | .collect(Collectors.toSet()); |
| 244 | } finally { |
| 245 | commit.close(); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Handles a update and get commit. |
| 251 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 252 | * @param commit updateAndGet commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 253 | * @return update result |
| 254 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 255 | protected MapEntryUpdateResult<String, byte[]> updateAndGet(Commit<? extends UpdateAndGet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 256 | MapEntryUpdateResult.Status updateStatus = validate(commit.operation()); |
| 257 | String key = commit.operation().key(); |
| 258 | MapEntryValue oldCommitValue = mapEntries.get(commit.operation().key()); |
| 259 | Versioned<byte[]> oldMapValue = toVersioned(oldCommitValue); |
| 260 | |
| 261 | if (updateStatus != MapEntryUpdateResult.Status.OK) { |
| 262 | commit.close(); |
| 263 | return new MapEntryUpdateResult<>(updateStatus, "", key, |
| 264 | oldMapValue, oldMapValue); |
| 265 | } |
| 266 | |
| 267 | byte[] newValue = commit.operation().value(); |
| 268 | long newVersion = versionCounter.incrementAndGet(); |
| 269 | Versioned<byte[]> newMapValue = newValue == null ? null |
| 270 | : new Versioned<>(newValue, newVersion); |
| 271 | |
| 272 | MapEvent.Type updateType = newValue == null ? REMOVE |
| 273 | : oldCommitValue == null ? INSERT : UPDATE; |
| 274 | if (updateType == REMOVE || updateType == UPDATE) { |
| 275 | mapEntries.remove(key); |
| 276 | oldCommitValue.discard(); |
| 277 | } |
| 278 | if (updateType == INSERT || updateType == UPDATE) { |
| 279 | mapEntries.put(key, new NonTransactionalCommit(newVersion, commit)); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 280 | } else { |
| 281 | commit.close(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 282 | } |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 283 | publish(Lists.newArrayList(new MapEvent<>("", key, newMapValue, oldMapValue))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 284 | return new MapEntryUpdateResult<>(updateStatus, "", key, oldMapValue, |
| 285 | newMapValue); |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * Handles a clear commit. |
| 290 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 291 | * @param commit clear commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 292 | * @return clear result |
| 293 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 294 | protected MapEntryUpdateResult.Status clear(Commit<? extends Clear> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 295 | try { |
| 296 | Iterator<Map.Entry<String, MapEntryValue>> iterator = mapEntries |
| 297 | .entrySet().iterator(); |
| 298 | while (iterator.hasNext()) { |
| 299 | Map.Entry<String, MapEntryValue> entry = iterator.next(); |
| 300 | String key = entry.getKey(); |
| 301 | MapEntryValue value = entry.getValue(); |
| 302 | Versioned<byte[]> removedValue = new Versioned<>(value.value(), |
| 303 | value.version()); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 304 | publish(Lists.newArrayList(new MapEvent<>("", key, null, removedValue))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 305 | value.discard(); |
| 306 | iterator.remove(); |
| 307 | } |
| 308 | return MapEntryUpdateResult.Status.OK; |
| 309 | } finally { |
| 310 | commit.close(); |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * Handles a listen commit. |
| 316 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 317 | * @param commit listen commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 318 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 319 | protected void listen(Commit<? extends Listen> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 320 | Long sessionId = commit.session().id(); |
| 321 | listeners.put(sessionId, commit); |
| 322 | commit.session() |
| 323 | .onStateChange( |
| 324 | state -> { |
| 325 | if (state == Session.State.CLOSED |
| 326 | || state == Session.State.EXPIRED) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 327 | Commit<? extends Listen> listener = listeners.remove(sessionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 328 | if (listener != null) { |
| 329 | listener.close(); |
| 330 | } |
| 331 | } |
| 332 | }); |
| 333 | } |
| 334 | |
| 335 | /** |
| 336 | * Handles an unlisten commit. |
| 337 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 338 | * @param commit unlisten commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 339 | */ |
| 340 | protected void unlisten( |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 341 | Commit<? extends Unlisten> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 342 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 343 | Commit<? extends Listen> listener = listeners.remove(commit.session()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 344 | if (listener != null) { |
| 345 | listener.close(); |
| 346 | } |
| 347 | } finally { |
| 348 | commit.close(); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | /** |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 353 | * Handles an prepare commit. |
| 354 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 355 | * @param commit transaction prepare commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 356 | * @return prepare result |
| 357 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 358 | protected PrepareResult prepare(Commit<? extends TransactionPrepare> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 359 | boolean ok = false; |
| 360 | try { |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 361 | MapTransaction<String, byte[]> transaction = commit.operation().transaction(); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 362 | for (MapUpdate<String, byte[]> update : transaction.updates()) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 363 | String key = update.key(); |
| 364 | if (preparedKeys.contains(key)) { |
| 365 | return PrepareResult.CONCURRENT_TRANSACTION; |
| 366 | } |
| 367 | MapEntryValue existingValue = mapEntries.get(key); |
| 368 | if (existingValue == null) { |
| 369 | if (update.currentValue() != null) { |
| 370 | return PrepareResult.OPTIMISTIC_LOCK_FAILURE; |
| 371 | } |
| 372 | } else { |
| 373 | if (existingValue.version() != update.currentVersion()) { |
| 374 | return PrepareResult.OPTIMISTIC_LOCK_FAILURE; |
| 375 | } |
| 376 | } |
| 377 | } |
| 378 | // No violations detected. Add to pendingTranctions and mark |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 379 | // modified keys as locked for updates. |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 380 | pendingTransactions.put(transaction.transactionId(), commit); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 381 | transaction.updates().forEach(u -> preparedKeys.add(u.key())); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 382 | ok = true; |
| 383 | return PrepareResult.OK; |
| 384 | } finally { |
| 385 | if (!ok) { |
| 386 | commit.close(); |
| 387 | } |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | /** |
| 392 | * Handles an commit commit (ha!). |
| 393 | * |
| 394 | * @param commit transaction commit commit |
| 395 | * @return commit result |
| 396 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 397 | protected CommitResult commit(Commit<? extends TransactionCommit> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 398 | TransactionId transactionId = commit.operation().transactionId(); |
| 399 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 400 | Commit<? extends TransactionPrepare> prepareCommit = pendingTransactions |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 401 | .remove(transactionId); |
| 402 | if (prepareCommit == null) { |
| 403 | return CommitResult.UNKNOWN_TRANSACTION_ID; |
| 404 | } |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 405 | MapTransaction<String, byte[]> transaction = prepareCommit.operation().transaction(); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 406 | long totalReferencesToCommit = transaction |
| 407 | .updates() |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 408 | .stream() |
| 409 | .filter(update -> update.type() != MapUpdate.Type.REMOVE_IF_VERSION_MATCH) |
| 410 | .count(); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 411 | CountDownCompleter<Commit<? extends TransactionPrepare>> completer = |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 412 | new CountDownCompleter<>(prepareCommit, totalReferencesToCommit, Commit::close); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 413 | List<MapEvent<String, byte[]>> eventsToPublish = Lists.newArrayList(); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 414 | for (MapUpdate<String, byte[]> update : transaction.updates()) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 415 | String key = update.key(); |
| 416 | MapEntryValue previousValue = mapEntries.remove(key); |
| 417 | MapEntryValue newValue = null; |
| 418 | checkState(preparedKeys.remove(key), "key is not prepared"); |
| 419 | if (update.type() != MapUpdate.Type.REMOVE_IF_VERSION_MATCH) { |
| 420 | newValue = new TransactionalCommit(key, |
| 421 | versionCounter.incrementAndGet(), completer); |
| 422 | } |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 423 | eventsToPublish.add(new MapEvent<>("", key, toVersioned(newValue), toVersioned(previousValue))); |
| 424 | if (newValue != null) { |
| 425 | mapEntries.put(key, newValue); |
| 426 | } |
| 427 | if (previousValue != null) { |
| 428 | previousValue.discard(); |
| 429 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 430 | } |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 431 | publish(eventsToPublish); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 432 | return CommitResult.OK; |
| 433 | } finally { |
| 434 | commit.close(); |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * Handles an rollback commit (ha!). |
| 440 | * |
| 441 | * @param commit transaction rollback commit |
| 442 | * @return rollback result |
| 443 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 444 | protected RollbackResult rollback(Commit<? extends TransactionRollback> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 445 | TransactionId transactionId = commit.operation().transactionId(); |
| 446 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 447 | Commit<? extends TransactionPrepare> prepareCommit = pendingTransactions.remove(transactionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 448 | if (prepareCommit == null) { |
| 449 | return RollbackResult.UNKNOWN_TRANSACTION_ID; |
| 450 | } else { |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 451 | prepareCommit.operation() |
| 452 | .transaction() |
| 453 | .updates() |
| 454 | .forEach(u -> preparedKeys.remove(u.key())); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 455 | prepareCommit.close(); |
| 456 | return RollbackResult.OK; |
| 457 | } |
| 458 | } finally { |
| 459 | commit.close(); |
| 460 | } |
| 461 | } |
| 462 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 463 | /** |
| 464 | * Computes the update status that would result if the specified update were to applied to |
| 465 | * the state machine. |
| 466 | * |
| 467 | * @param update update |
| 468 | * @return status |
| 469 | */ |
| 470 | private MapEntryUpdateResult.Status validate(UpdateAndGet update) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 471 | MapEntryValue existingValue = mapEntries.get(update.key()); |
| 472 | if (existingValue == null && update.value() == null) { |
| 473 | return MapEntryUpdateResult.Status.NOOP; |
| 474 | } |
| 475 | if (preparedKeys.contains(update.key())) { |
| 476 | return MapEntryUpdateResult.Status.WRITE_LOCK; |
| 477 | } |
| 478 | byte[] existingRawValue = existingValue == null ? null : existingValue |
| 479 | .value(); |
| 480 | Long existingVersion = existingValue == null ? null : existingValue |
| 481 | .version(); |
| 482 | return update.valueMatch().matches(existingRawValue) |
| 483 | && update.versionMatch().matches(existingVersion) ? MapEntryUpdateResult.Status.OK |
| 484 | : MapEntryUpdateResult.Status.PRECONDITION_FAILED; |
| 485 | } |
| 486 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 487 | /** |
| 488 | * Utility for turning a {@code MapEntryValue} to {@code Versioned}. |
| 489 | * @param value map entry value |
| 490 | * @return versioned instance |
| 491 | */ |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 492 | private Versioned<byte[]> toVersioned(MapEntryValue value) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 493 | return value == null ? null : new Versioned<>(value.value(), value.version()); |
| 494 | } |
| 495 | |
| 496 | /** |
| 497 | * Publishes events to listeners. |
| 498 | * |
| 499 | * @param events list of map event to publish |
| 500 | */ |
| 501 | private void publish(List<MapEvent<String, byte[]>> events) { |
| 502 | listeners.values().forEach(commit -> commit.session().publish(AtomixConsistentMap.CHANGE_SUBJECT, events)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | @Override |
| 506 | public void register(Session session) { |
| 507 | } |
| 508 | |
| 509 | @Override |
| 510 | public void unregister(Session session) { |
| 511 | closeListener(session.id()); |
| 512 | } |
| 513 | |
| 514 | @Override |
| 515 | public void expire(Session session) { |
| 516 | closeListener(session.id()); |
| 517 | } |
| 518 | |
| 519 | @Override |
| 520 | public void close(Session session) { |
| 521 | closeListener(session.id()); |
| 522 | } |
| 523 | |
| 524 | private void closeListener(Long sessionId) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 525 | Commit<? extends Listen> commit = listeners.remove(sessionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 526 | if (commit != null) { |
| 527 | commit.close(); |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | /** |
| 532 | * Interface implemented by map values. |
| 533 | */ |
| 534 | private interface MapEntryValue { |
| 535 | /** |
| 536 | * Returns the raw {@code byte[]}. |
| 537 | * |
| 538 | * @return raw value |
| 539 | */ |
| 540 | byte[] value(); |
| 541 | |
| 542 | /** |
| 543 | * Returns the version of the value. |
| 544 | * |
| 545 | * @return version |
| 546 | */ |
| 547 | long version(); |
| 548 | |
| 549 | /** |
| 550 | * Discards the value by invoke appropriate clean up actions. |
| 551 | */ |
| 552 | void discard(); |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * A {@code MapEntryValue} that is derived from a non-transactional update |
| 557 | * i.e. via any standard map update operation. |
| 558 | */ |
| 559 | private class NonTransactionalCommit implements MapEntryValue { |
| 560 | private final long version; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 561 | private final Commit<? extends UpdateAndGet> commit; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 562 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 563 | public NonTransactionalCommit(long version, Commit<? extends UpdateAndGet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 564 | this.version = version; |
| 565 | this.commit = commit; |
| 566 | } |
| 567 | |
| 568 | @Override |
| 569 | public byte[] value() { |
| 570 | return commit.operation().value(); |
| 571 | } |
| 572 | |
| 573 | @Override |
| 574 | public long version() { |
| 575 | return version; |
| 576 | } |
| 577 | |
| 578 | @Override |
| 579 | public void discard() { |
| 580 | commit.close(); |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | /** |
| 585 | * A {@code MapEntryValue} that is derived from updates submitted via a |
| 586 | * transaction. |
| 587 | */ |
| 588 | private class TransactionalCommit implements MapEntryValue { |
| 589 | private final String key; |
| 590 | private final long version; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 591 | private final CountDownCompleter<Commit<? extends TransactionPrepare>> completer; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 592 | |
| 593 | public TransactionalCommit( |
| 594 | String key, |
| 595 | long version, |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 596 | CountDownCompleter<Commit<? extends TransactionPrepare>> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 597 | this.key = key; |
| 598 | this.version = version; |
| 599 | this.completer = commit; |
| 600 | } |
| 601 | |
| 602 | @Override |
| 603 | public byte[] value() { |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 604 | MapTransaction<String, byte[]> transaction = completer.object().operation().transaction(); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 605 | return valueForKey(key, transaction); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | @Override |
| 609 | public long version() { |
| 610 | return version; |
| 611 | } |
| 612 | |
| 613 | @Override |
| 614 | public void discard() { |
| 615 | completer.countDown(); |
| 616 | } |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 617 | |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 618 | private byte[] valueForKey(String key, MapTransaction<String, byte[]> transaction) { |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 619 | MapUpdate<String, byte[]> update = transaction.updates() |
| 620 | .stream() |
| 621 | .filter(u -> u.key().equals(key)) |
| 622 | .findFirst() |
| 623 | .orElse(null); |
| 624 | return update == null ? null : update.value(); |
| 625 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 626 | } |
| 627 | } |