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; |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 21 | import io.atomix.copycat.server.session.ServerSession; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 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; |
| 29 | |
| 30 | import java.util.Collection; |
| 31 | import java.util.HashMap; |
| 32 | import java.util.Iterator; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 33 | import java.util.List; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 34 | import java.util.Map; |
Madan Jampani | 65f24bb | 2016-03-15 15:16:18 -0700 | [diff] [blame] | 35 | import java.util.Properties; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 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 | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame^] | 55 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionPrepareAndCommit; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 56 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionRollback; |
| 57 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Unlisten; |
| 58 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.UpdateAndGet; |
| 59 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Values; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 60 | import org.onosproject.store.service.MapEvent; |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 61 | import org.onosproject.store.service.MapTransaction; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 62 | import org.onosproject.store.service.Versioned; |
| 63 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 64 | import com.google.common.collect.Lists; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 65 | import com.google.common.collect.Maps; |
| 66 | import com.google.common.collect.Sets; |
| 67 | |
| 68 | import static com.google.common.base.Preconditions.checkState; |
| 69 | |
| 70 | /** |
| 71 | * State Machine for {@link AtomixConsistentMap} resource. |
| 72 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 73 | public class AtomixConsistentMapState extends ResourceStateMachine implements SessionListener, Snapshottable { |
Madan Jampani | 86cb243 | 2016-02-17 11:07:56 -0800 | [diff] [blame] | 74 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 75 | private final Map<Long, Commit<? extends AtomixConsistentMapCommands.Listen>> listeners = new HashMap<>(); |
| 76 | private final Map<String, MapEntryValue> mapEntries = new HashMap<>(); |
| 77 | private final Set<String> preparedKeys = Sets.newHashSet(); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 78 | private final Map<TransactionId, Commit<? extends TransactionPrepare>> pendingTransactions = Maps.newHashMap(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 79 | private AtomicLong versionCounter = new AtomicLong(0); |
| 80 | |
Madan Jampani | 65f24bb | 2016-03-15 15:16:18 -0700 | [diff] [blame] | 81 | public AtomixConsistentMapState(Properties properties) { |
| 82 | super(properties); |
Madan Jampani | 86cb243 | 2016-02-17 11:07:56 -0800 | [diff] [blame] | 83 | } |
| 84 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 85 | @Override |
| 86 | public void snapshot(SnapshotWriter writer) { |
| 87 | writer.writeLong(versionCounter.get()); |
| 88 | } |
| 89 | |
| 90 | @Override |
| 91 | public void install(SnapshotReader reader) { |
| 92 | versionCounter = new AtomicLong(reader.readLong()); |
| 93 | } |
| 94 | |
| 95 | @Override |
| 96 | protected void configure(StateMachineExecutor executor) { |
| 97 | // Listeners |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 98 | executor.register(Listen.class, this::listen); |
| 99 | executor.register(Unlisten.class, this::unlisten); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 100 | // Queries |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 101 | executor.register(ContainsKey.class, this::containsKey); |
| 102 | executor.register(ContainsValue.class, this::containsValue); |
| 103 | executor.register(EntrySet.class, this::entrySet); |
| 104 | executor.register(Get.class, this::get); |
| 105 | executor.register(IsEmpty.class, this::isEmpty); |
| 106 | executor.register(KeySet.class, this::keySet); |
| 107 | executor.register(Size.class, this::size); |
| 108 | executor.register(Values.class, this::values); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 109 | // Commands |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 110 | executor.register(UpdateAndGet.class, this::updateAndGet); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 111 | executor.register(AtomixConsistentMapCommands.Clear.class, this::clear); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 112 | executor.register(TransactionPrepare.class, this::prepare); |
| 113 | executor.register(TransactionCommit.class, this::commit); |
| 114 | executor.register(TransactionRollback.class, this::rollback); |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame^] | 115 | executor.register(TransactionPrepareAndCommit.class, this::prepareAndCommit); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | @Override |
| 119 | public void delete() { |
| 120 | // Delete Listeners |
| 121 | listeners.values().forEach(Commit::close); |
| 122 | listeners.clear(); |
| 123 | |
| 124 | // Delete Map entries |
| 125 | mapEntries.values().forEach(MapEntryValue::discard); |
| 126 | mapEntries.clear(); |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Handles a contains key commit. |
| 131 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 132 | * @param commit containsKey commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 133 | * @return {@code true} if map contains key |
| 134 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 135 | protected boolean containsKey(Commit<? extends ContainsKey> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 136 | try { |
| 137 | return toVersioned(mapEntries.get(commit.operation().key())) != null; |
| 138 | } finally { |
| 139 | commit.close(); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Handles a contains value commit. |
| 145 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 146 | * @param commit containsValue commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 147 | * @return {@code true} if map contains value |
| 148 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 149 | protected boolean containsValue(Commit<? extends ContainsValue> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 150 | try { |
| 151 | Match<byte[]> valueMatch = Match |
| 152 | .ifValue(commit.operation().value()); |
| 153 | return mapEntries.values().stream() |
| 154 | .anyMatch(value -> valueMatch.matches(value.value())); |
| 155 | } finally { |
| 156 | commit.close(); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Handles a get commit. |
| 162 | * |
| 163 | * @param commit |
| 164 | * get commit |
| 165 | * @return value mapped to key |
| 166 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 167 | protected Versioned<byte[]> get(Commit<? extends Get> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 168 | try { |
| 169 | return toVersioned(mapEntries.get(commit.operation().key())); |
| 170 | } finally { |
| 171 | commit.close(); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * Handles a count commit. |
| 177 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 178 | * @param commit size commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 179 | * @return number of entries in map |
| 180 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 181 | protected int size(Commit<? extends Size> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 182 | try { |
| 183 | return mapEntries.size(); |
| 184 | } finally { |
| 185 | commit.close(); |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * Handles an is empty commit. |
| 191 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 192 | * @param commit isEmpty commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 193 | * @return {@code true} if map is empty |
| 194 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 195 | protected boolean isEmpty(Commit<? extends IsEmpty> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 196 | try { |
| 197 | return mapEntries.isEmpty(); |
| 198 | } finally { |
| 199 | commit.close(); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * Handles a keySet commit. |
| 205 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 206 | * @param commit keySet commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 207 | * @return set of keys in map |
| 208 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 209 | protected Set<String> keySet(Commit<? extends KeySet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 210 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 211 | return mapEntries.keySet().stream().collect(Collectors.toSet()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 212 | } finally { |
| 213 | commit.close(); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * Handles a values commit. |
| 219 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 220 | * @param commit values commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 221 | * @return collection of values in map |
| 222 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 223 | protected Collection<Versioned<byte[]>> values(Commit<? extends Values> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 224 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 225 | return mapEntries.values().stream().map(this::toVersioned).collect(Collectors.toList()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 226 | } finally { |
| 227 | commit.close(); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Handles a entry set commit. |
| 233 | * |
| 234 | * @param commit |
| 235 | * entrySet commit |
| 236 | * @return set of map entries |
| 237 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 238 | protected Set<Map.Entry<String, Versioned<byte[]>>> entrySet(Commit<? extends EntrySet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 239 | try { |
| 240 | return mapEntries |
| 241 | .entrySet() |
| 242 | .stream() |
| 243 | .map(e -> Maps.immutableEntry(e.getKey(), |
| 244 | toVersioned(e.getValue()))) |
| 245 | .collect(Collectors.toSet()); |
| 246 | } finally { |
| 247 | commit.close(); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * Handles a update and get commit. |
| 253 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 254 | * @param commit updateAndGet commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 255 | * @return update result |
| 256 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 257 | protected MapEntryUpdateResult<String, byte[]> updateAndGet(Commit<? extends UpdateAndGet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 258 | MapEntryUpdateResult.Status updateStatus = validate(commit.operation()); |
| 259 | String key = commit.operation().key(); |
| 260 | MapEntryValue oldCommitValue = mapEntries.get(commit.operation().key()); |
| 261 | Versioned<byte[]> oldMapValue = toVersioned(oldCommitValue); |
| 262 | |
| 263 | if (updateStatus != MapEntryUpdateResult.Status.OK) { |
| 264 | commit.close(); |
| 265 | return new MapEntryUpdateResult<>(updateStatus, "", key, |
| 266 | oldMapValue, oldMapValue); |
| 267 | } |
| 268 | |
| 269 | byte[] newValue = commit.operation().value(); |
| 270 | long newVersion = versionCounter.incrementAndGet(); |
| 271 | Versioned<byte[]> newMapValue = newValue == null ? null |
| 272 | : new Versioned<>(newValue, newVersion); |
| 273 | |
| 274 | MapEvent.Type updateType = newValue == null ? REMOVE |
| 275 | : oldCommitValue == null ? INSERT : UPDATE; |
| 276 | if (updateType == REMOVE || updateType == UPDATE) { |
| 277 | mapEntries.remove(key); |
| 278 | oldCommitValue.discard(); |
| 279 | } |
| 280 | if (updateType == INSERT || updateType == UPDATE) { |
| 281 | mapEntries.put(key, new NonTransactionalCommit(newVersion, commit)); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 282 | } else { |
| 283 | commit.close(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 284 | } |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 285 | publish(Lists.newArrayList(new MapEvent<>("", key, newMapValue, oldMapValue))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 286 | return new MapEntryUpdateResult<>(updateStatus, "", key, oldMapValue, |
| 287 | newMapValue); |
| 288 | } |
| 289 | |
| 290 | /** |
| 291 | * Handles a clear commit. |
| 292 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 293 | * @param commit clear commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 294 | * @return clear result |
| 295 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 296 | protected MapEntryUpdateResult.Status clear(Commit<? extends Clear> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 297 | try { |
| 298 | Iterator<Map.Entry<String, MapEntryValue>> iterator = mapEntries |
| 299 | .entrySet().iterator(); |
| 300 | while (iterator.hasNext()) { |
| 301 | Map.Entry<String, MapEntryValue> entry = iterator.next(); |
| 302 | String key = entry.getKey(); |
| 303 | MapEntryValue value = entry.getValue(); |
| 304 | Versioned<byte[]> removedValue = new Versioned<>(value.value(), |
| 305 | value.version()); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 306 | publish(Lists.newArrayList(new MapEvent<>("", key, null, removedValue))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 307 | value.discard(); |
| 308 | iterator.remove(); |
| 309 | } |
| 310 | return MapEntryUpdateResult.Status.OK; |
| 311 | } finally { |
| 312 | commit.close(); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * Handles a listen commit. |
| 318 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 319 | * @param commit listen commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 320 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 321 | protected void listen(Commit<? extends Listen> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 322 | Long sessionId = commit.session().id(); |
Madan Jampani | e603887 | 2016-03-03 12:14:37 -0800 | [diff] [blame] | 323 | if (listeners.putIfAbsent(sessionId, commit) != null) { |
| 324 | commit.close(); |
| 325 | return; |
| 326 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 327 | commit.session() |
| 328 | .onStateChange( |
| 329 | state -> { |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 330 | if (state == ServerSession.State.CLOSED |
| 331 | || state == ServerSession.State.EXPIRED) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 332 | Commit<? extends Listen> listener = listeners.remove(sessionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 333 | if (listener != null) { |
| 334 | listener.close(); |
| 335 | } |
| 336 | } |
| 337 | }); |
| 338 | } |
| 339 | |
| 340 | /** |
| 341 | * Handles an unlisten commit. |
| 342 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 343 | * @param commit unlisten commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 344 | */ |
Madan Jampani | 40f022e | 2016-03-02 21:35:14 -0800 | [diff] [blame] | 345 | protected void unlisten(Commit<? extends Unlisten> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 346 | try { |
Madan Jampani | 40f022e | 2016-03-02 21:35:14 -0800 | [diff] [blame] | 347 | Commit<? extends Listen> listener = listeners.remove(commit.session().id()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 348 | if (listener != null) { |
| 349 | listener.close(); |
| 350 | } |
| 351 | } finally { |
| 352 | commit.close(); |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | /** |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame^] | 357 | * Handles an prepare and commit commit. |
| 358 | * |
| 359 | * @param commit transaction prepare and commit commit |
| 360 | * @return prepare result |
| 361 | */ |
| 362 | protected PrepareResult prepareAndCommit(Commit<? extends TransactionPrepareAndCommit> commit) { |
| 363 | PrepareResult prepareResult = prepare(commit); |
| 364 | if (prepareResult == PrepareResult.OK) { |
| 365 | commitInternal(commit.operation().transaction().transactionId()); |
| 366 | } |
| 367 | return prepareResult; |
| 368 | } |
| 369 | |
| 370 | /** |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 371 | * Handles an prepare commit. |
| 372 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 373 | * @param commit transaction prepare commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 374 | * @return prepare result |
| 375 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 376 | protected PrepareResult prepare(Commit<? extends TransactionPrepare> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 377 | boolean ok = false; |
| 378 | try { |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 379 | MapTransaction<String, byte[]> transaction = commit.operation().transaction(); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 380 | for (MapUpdate<String, byte[]> update : transaction.updates()) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 381 | String key = update.key(); |
| 382 | if (preparedKeys.contains(key)) { |
| 383 | return PrepareResult.CONCURRENT_TRANSACTION; |
| 384 | } |
| 385 | MapEntryValue existingValue = mapEntries.get(key); |
| 386 | if (existingValue == null) { |
| 387 | if (update.currentValue() != null) { |
| 388 | return PrepareResult.OPTIMISTIC_LOCK_FAILURE; |
| 389 | } |
| 390 | } else { |
| 391 | if (existingValue.version() != update.currentVersion()) { |
| 392 | return PrepareResult.OPTIMISTIC_LOCK_FAILURE; |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | // No violations detected. Add to pendingTranctions and mark |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 397 | // modified keys as locked for updates. |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 398 | pendingTransactions.put(transaction.transactionId(), commit); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 399 | transaction.updates().forEach(u -> preparedKeys.add(u.key())); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 400 | ok = true; |
| 401 | return PrepareResult.OK; |
| 402 | } finally { |
| 403 | if (!ok) { |
| 404 | commit.close(); |
| 405 | } |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * Handles an commit commit (ha!). |
| 411 | * |
| 412 | * @param commit transaction commit commit |
| 413 | * @return commit result |
| 414 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 415 | protected CommitResult commit(Commit<? extends TransactionCommit> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 416 | TransactionId transactionId = commit.operation().transactionId(); |
| 417 | try { |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame^] | 418 | return commitInternal(transactionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 419 | } finally { |
| 420 | commit.close(); |
| 421 | } |
| 422 | } |
| 423 | |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame^] | 424 | private CommitResult commitInternal(TransactionId transactionId) { |
| 425 | Commit<? extends TransactionPrepare> prepareCommit = pendingTransactions |
| 426 | .remove(transactionId); |
| 427 | if (prepareCommit == null) { |
| 428 | return CommitResult.UNKNOWN_TRANSACTION_ID; |
| 429 | } |
| 430 | MapTransaction<String, byte[]> transaction = prepareCommit.operation().transaction(); |
| 431 | long totalReferencesToCommit = transaction |
| 432 | .updates() |
| 433 | .stream() |
| 434 | .filter(update -> update.type() != MapUpdate.Type.REMOVE_IF_VERSION_MATCH) |
| 435 | .count(); |
| 436 | CountDownCompleter<Commit<? extends TransactionPrepare>> completer = |
| 437 | new CountDownCompleter<>(prepareCommit, totalReferencesToCommit, Commit::close); |
| 438 | List<MapEvent<String, byte[]>> eventsToPublish = Lists.newArrayList(); |
| 439 | for (MapUpdate<String, byte[]> update : transaction.updates()) { |
| 440 | String key = update.key(); |
| 441 | MapEntryValue previousValue = mapEntries.remove(key); |
| 442 | MapEntryValue newValue = null; |
| 443 | checkState(preparedKeys.remove(key), "key is not prepared"); |
| 444 | if (update.type() != MapUpdate.Type.REMOVE_IF_VERSION_MATCH) { |
| 445 | newValue = new TransactionalCommit(key, |
| 446 | versionCounter.incrementAndGet(), completer); |
| 447 | } |
| 448 | eventsToPublish.add(new MapEvent<>("", key, toVersioned(newValue), toVersioned(previousValue))); |
| 449 | if (newValue != null) { |
| 450 | mapEntries.put(key, newValue); |
| 451 | } |
| 452 | if (previousValue != null) { |
| 453 | previousValue.discard(); |
| 454 | } |
| 455 | } |
| 456 | publish(eventsToPublish); |
| 457 | return CommitResult.OK; |
| 458 | } |
| 459 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 460 | /** |
| 461 | * Handles an rollback commit (ha!). |
| 462 | * |
| 463 | * @param commit transaction rollback commit |
| 464 | * @return rollback result |
| 465 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 466 | protected RollbackResult rollback(Commit<? extends TransactionRollback> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 467 | TransactionId transactionId = commit.operation().transactionId(); |
| 468 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 469 | Commit<? extends TransactionPrepare> prepareCommit = pendingTransactions.remove(transactionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 470 | if (prepareCommit == null) { |
| 471 | return RollbackResult.UNKNOWN_TRANSACTION_ID; |
| 472 | } else { |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 473 | prepareCommit.operation() |
| 474 | .transaction() |
| 475 | .updates() |
| 476 | .forEach(u -> preparedKeys.remove(u.key())); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 477 | prepareCommit.close(); |
| 478 | return RollbackResult.OK; |
| 479 | } |
| 480 | } finally { |
| 481 | commit.close(); |
| 482 | } |
| 483 | } |
| 484 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 485 | /** |
| 486 | * Computes the update status that would result if the specified update were to applied to |
| 487 | * the state machine. |
| 488 | * |
| 489 | * @param update update |
| 490 | * @return status |
| 491 | */ |
| 492 | private MapEntryUpdateResult.Status validate(UpdateAndGet update) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 493 | MapEntryValue existingValue = mapEntries.get(update.key()); |
| 494 | if (existingValue == null && update.value() == null) { |
| 495 | return MapEntryUpdateResult.Status.NOOP; |
| 496 | } |
| 497 | if (preparedKeys.contains(update.key())) { |
| 498 | return MapEntryUpdateResult.Status.WRITE_LOCK; |
| 499 | } |
| 500 | byte[] existingRawValue = existingValue == null ? null : existingValue |
| 501 | .value(); |
| 502 | Long existingVersion = existingValue == null ? null : existingValue |
| 503 | .version(); |
| 504 | return update.valueMatch().matches(existingRawValue) |
| 505 | && update.versionMatch().matches(existingVersion) ? MapEntryUpdateResult.Status.OK |
| 506 | : MapEntryUpdateResult.Status.PRECONDITION_FAILED; |
| 507 | } |
| 508 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 509 | /** |
| 510 | * Utility for turning a {@code MapEntryValue} to {@code Versioned}. |
| 511 | * @param value map entry value |
| 512 | * @return versioned instance |
| 513 | */ |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 514 | private Versioned<byte[]> toVersioned(MapEntryValue value) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 515 | return value == null ? null : new Versioned<>(value.value(), value.version()); |
| 516 | } |
| 517 | |
| 518 | /** |
| 519 | * Publishes events to listeners. |
| 520 | * |
| 521 | * @param events list of map event to publish |
| 522 | */ |
| 523 | private void publish(List<MapEvent<String, byte[]>> events) { |
| 524 | listeners.values().forEach(commit -> commit.session().publish(AtomixConsistentMap.CHANGE_SUBJECT, events)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 528 | public void register(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 532 | public void unregister(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 533 | closeListener(session.id()); |
| 534 | } |
| 535 | |
| 536 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 537 | public void expire(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 538 | closeListener(session.id()); |
| 539 | } |
| 540 | |
| 541 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 542 | public void close(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 543 | closeListener(session.id()); |
| 544 | } |
| 545 | |
| 546 | private void closeListener(Long sessionId) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 547 | Commit<? extends Listen> commit = listeners.remove(sessionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 548 | if (commit != null) { |
| 549 | commit.close(); |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | /** |
| 554 | * Interface implemented by map values. |
| 555 | */ |
| 556 | private interface MapEntryValue { |
| 557 | /** |
| 558 | * Returns the raw {@code byte[]}. |
| 559 | * |
| 560 | * @return raw value |
| 561 | */ |
| 562 | byte[] value(); |
| 563 | |
| 564 | /** |
| 565 | * Returns the version of the value. |
| 566 | * |
| 567 | * @return version |
| 568 | */ |
| 569 | long version(); |
| 570 | |
| 571 | /** |
| 572 | * Discards the value by invoke appropriate clean up actions. |
| 573 | */ |
| 574 | void discard(); |
| 575 | } |
| 576 | |
| 577 | /** |
| 578 | * A {@code MapEntryValue} that is derived from a non-transactional update |
| 579 | * i.e. via any standard map update operation. |
| 580 | */ |
| 581 | private class NonTransactionalCommit implements MapEntryValue { |
| 582 | private final long version; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 583 | private final Commit<? extends UpdateAndGet> commit; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 584 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 585 | public NonTransactionalCommit(long version, Commit<? extends UpdateAndGet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 586 | this.version = version; |
| 587 | this.commit = commit; |
| 588 | } |
| 589 | |
| 590 | @Override |
| 591 | public byte[] value() { |
| 592 | return commit.operation().value(); |
| 593 | } |
| 594 | |
| 595 | @Override |
| 596 | public long version() { |
| 597 | return version; |
| 598 | } |
| 599 | |
| 600 | @Override |
| 601 | public void discard() { |
| 602 | commit.close(); |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | /** |
| 607 | * A {@code MapEntryValue} that is derived from updates submitted via a |
| 608 | * transaction. |
| 609 | */ |
| 610 | private class TransactionalCommit implements MapEntryValue { |
| 611 | private final String key; |
| 612 | private final long version; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 613 | private final CountDownCompleter<Commit<? extends TransactionPrepare>> completer; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 614 | |
| 615 | public TransactionalCommit( |
| 616 | String key, |
| 617 | long version, |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 618 | CountDownCompleter<Commit<? extends TransactionPrepare>> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 619 | this.key = key; |
| 620 | this.version = version; |
| 621 | this.completer = commit; |
| 622 | } |
| 623 | |
| 624 | @Override |
| 625 | public byte[] value() { |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 626 | MapTransaction<String, byte[]> transaction = completer.object().operation().transaction(); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 627 | return valueForKey(key, transaction); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 628 | } |
| 629 | |
| 630 | @Override |
| 631 | public long version() { |
| 632 | return version; |
| 633 | } |
| 634 | |
| 635 | @Override |
| 636 | public void discard() { |
| 637 | completer.countDown(); |
| 638 | } |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 639 | |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 640 | private byte[] valueForKey(String key, MapTransaction<String, byte[]> transaction) { |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 641 | MapUpdate<String, byte[]> update = transaction.updates() |
| 642 | .stream() |
| 643 | .filter(u -> u.key().equals(key)) |
| 644 | .findFirst() |
| 645 | .orElse(null); |
| 646 | return update == null ? null : update.value(); |
| 647 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 648 | } |
| 649 | } |