Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Laboratory |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [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 | 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; |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 21 | import static org.slf4j.LoggerFactory.getLogger; |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 22 | import io.atomix.copycat.server.session.ServerSession; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 23 | import io.atomix.copycat.server.Commit; |
| 24 | import io.atomix.copycat.server.Snapshottable; |
| 25 | import io.atomix.copycat.server.StateMachineExecutor; |
| 26 | import io.atomix.copycat.server.session.SessionListener; |
| 27 | import io.atomix.copycat.server.storage.snapshot.SnapshotReader; |
| 28 | import io.atomix.copycat.server.storage.snapshot.SnapshotWriter; |
| 29 | import io.atomix.resource.ResourceStateMachine; |
| 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; |
Madan Jampani | 65f24bb | 2016-03-15 15:16:18 -0700 | [diff] [blame] | 36 | import java.util.Properties; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 37 | import java.util.Set; |
| 38 | import java.util.concurrent.atomic.AtomicLong; |
| 39 | import java.util.stream.Collectors; |
| 40 | |
| 41 | import org.onlab.util.CountDownCompleter; |
| 42 | import org.onlab.util.Match; |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 43 | import org.onosproject.store.primitives.MapUpdate; |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 44 | import org.onosproject.store.primitives.TransactionId; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 45 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Clear; |
| 46 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.ContainsKey; |
| 47 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.ContainsValue; |
| 48 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.EntrySet; |
| 49 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Get; |
| 50 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.IsEmpty; |
| 51 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.KeySet; |
| 52 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Listen; |
| 53 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Size; |
| 54 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionCommit; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 55 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionPrepare; |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 56 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionPrepareAndCommit; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 57 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionRollback; |
| 58 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Unlisten; |
| 59 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.UpdateAndGet; |
| 60 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Values; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 61 | import org.onosproject.store.service.MapEvent; |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 62 | import org.onosproject.store.service.MapTransaction; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 63 | import org.onosproject.store.service.Versioned; |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 64 | import org.slf4j.Logger; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 65 | |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 66 | import com.google.common.base.Throwables; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 67 | import com.google.common.collect.Lists; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 68 | import com.google.common.collect.Maps; |
| 69 | import com.google.common.collect.Sets; |
| 70 | |
| 71 | import static com.google.common.base.Preconditions.checkState; |
| 72 | |
| 73 | /** |
| 74 | * State Machine for {@link AtomixConsistentMap} resource. |
| 75 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 76 | public class AtomixConsistentMapState extends ResourceStateMachine implements SessionListener, Snapshottable { |
Madan Jampani | 86cb243 | 2016-02-17 11:07:56 -0800 | [diff] [blame] | 77 | |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 78 | private final Logger log = getLogger(getClass()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 79 | private final Map<Long, Commit<? extends AtomixConsistentMapCommands.Listen>> listeners = new HashMap<>(); |
| 80 | private final Map<String, MapEntryValue> mapEntries = new HashMap<>(); |
| 81 | private final Set<String> preparedKeys = Sets.newHashSet(); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 82 | private final Map<TransactionId, Commit<? extends TransactionPrepare>> pendingTransactions = Maps.newHashMap(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 83 | private AtomicLong versionCounter = new AtomicLong(0); |
| 84 | |
Madan Jampani | 65f24bb | 2016-03-15 15:16:18 -0700 | [diff] [blame] | 85 | public AtomixConsistentMapState(Properties properties) { |
| 86 | super(properties); |
Madan Jampani | 86cb243 | 2016-02-17 11:07:56 -0800 | [diff] [blame] | 87 | } |
| 88 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 89 | @Override |
| 90 | public void snapshot(SnapshotWriter writer) { |
| 91 | writer.writeLong(versionCounter.get()); |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | public void install(SnapshotReader reader) { |
| 96 | versionCounter = new AtomicLong(reader.readLong()); |
| 97 | } |
| 98 | |
| 99 | @Override |
| 100 | protected void configure(StateMachineExecutor executor) { |
| 101 | // Listeners |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 102 | executor.register(Listen.class, this::listen); |
| 103 | executor.register(Unlisten.class, this::unlisten); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 104 | // Queries |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 105 | executor.register(ContainsKey.class, this::containsKey); |
| 106 | executor.register(ContainsValue.class, this::containsValue); |
| 107 | executor.register(EntrySet.class, this::entrySet); |
| 108 | executor.register(Get.class, this::get); |
| 109 | executor.register(IsEmpty.class, this::isEmpty); |
| 110 | executor.register(KeySet.class, this::keySet); |
| 111 | executor.register(Size.class, this::size); |
| 112 | executor.register(Values.class, this::values); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 113 | // Commands |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 114 | executor.register(UpdateAndGet.class, this::updateAndGet); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 115 | executor.register(AtomixConsistentMapCommands.Clear.class, this::clear); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 116 | executor.register(TransactionPrepare.class, this::prepare); |
| 117 | executor.register(TransactionCommit.class, this::commit); |
| 118 | executor.register(TransactionRollback.class, this::rollback); |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 119 | executor.register(TransactionPrepareAndCommit.class, this::prepareAndCommit); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | @Override |
| 123 | public void delete() { |
| 124 | // Delete Listeners |
| 125 | listeners.values().forEach(Commit::close); |
| 126 | listeners.clear(); |
| 127 | |
| 128 | // Delete Map entries |
| 129 | mapEntries.values().forEach(MapEntryValue::discard); |
| 130 | mapEntries.clear(); |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Handles a contains key commit. |
| 135 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 136 | * @param commit containsKey commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 137 | * @return {@code true} if map contains key |
| 138 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 139 | protected boolean containsKey(Commit<? extends ContainsKey> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 140 | try { |
| 141 | return toVersioned(mapEntries.get(commit.operation().key())) != null; |
| 142 | } finally { |
| 143 | commit.close(); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Handles a contains value commit. |
| 149 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 150 | * @param commit containsValue commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 151 | * @return {@code true} if map contains value |
| 152 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 153 | protected boolean containsValue(Commit<? extends ContainsValue> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 154 | try { |
| 155 | Match<byte[]> valueMatch = Match |
| 156 | .ifValue(commit.operation().value()); |
| 157 | return mapEntries.values().stream() |
| 158 | .anyMatch(value -> valueMatch.matches(value.value())); |
| 159 | } finally { |
| 160 | commit.close(); |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * Handles a get commit. |
| 166 | * |
| 167 | * @param commit |
| 168 | * get commit |
| 169 | * @return value mapped to key |
| 170 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 171 | protected Versioned<byte[]> get(Commit<? extends Get> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 172 | try { |
| 173 | return toVersioned(mapEntries.get(commit.operation().key())); |
| 174 | } finally { |
| 175 | commit.close(); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * Handles a count commit. |
| 181 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 182 | * @param commit size commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 183 | * @return number of entries in map |
| 184 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 185 | protected int size(Commit<? extends Size> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 186 | try { |
| 187 | return mapEntries.size(); |
| 188 | } finally { |
| 189 | commit.close(); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | /** |
| 194 | * Handles an is empty commit. |
| 195 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 196 | * @param commit isEmpty commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 197 | * @return {@code true} if map is empty |
| 198 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 199 | protected boolean isEmpty(Commit<? extends IsEmpty> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 200 | try { |
| 201 | return mapEntries.isEmpty(); |
| 202 | } finally { |
| 203 | commit.close(); |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * Handles a keySet commit. |
| 209 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 210 | * @param commit keySet commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 211 | * @return set of keys in map |
| 212 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 213 | protected Set<String> keySet(Commit<? extends KeySet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 214 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 215 | return mapEntries.keySet().stream().collect(Collectors.toSet()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 216 | } finally { |
| 217 | commit.close(); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * Handles a values commit. |
| 223 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 224 | * @param commit values commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 225 | * @return collection of values in map |
| 226 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 227 | protected Collection<Versioned<byte[]>> values(Commit<? extends Values> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 228 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 229 | return mapEntries.values().stream().map(this::toVersioned).collect(Collectors.toList()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 230 | } finally { |
| 231 | commit.close(); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * Handles a entry set commit. |
| 237 | * |
| 238 | * @param commit |
| 239 | * entrySet commit |
| 240 | * @return set of map entries |
| 241 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 242 | protected Set<Map.Entry<String, Versioned<byte[]>>> entrySet(Commit<? extends EntrySet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 243 | try { |
| 244 | return mapEntries |
| 245 | .entrySet() |
| 246 | .stream() |
| 247 | .map(e -> Maps.immutableEntry(e.getKey(), |
| 248 | toVersioned(e.getValue()))) |
| 249 | .collect(Collectors.toSet()); |
| 250 | } finally { |
| 251 | commit.close(); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * Handles a update and get commit. |
| 257 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 258 | * @param commit updateAndGet commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 259 | * @return update result |
| 260 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 261 | protected MapEntryUpdateResult<String, byte[]> updateAndGet(Commit<? extends UpdateAndGet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 262 | MapEntryUpdateResult.Status updateStatus = validate(commit.operation()); |
| 263 | String key = commit.operation().key(); |
| 264 | MapEntryValue oldCommitValue = mapEntries.get(commit.operation().key()); |
| 265 | Versioned<byte[]> oldMapValue = toVersioned(oldCommitValue); |
| 266 | |
| 267 | if (updateStatus != MapEntryUpdateResult.Status.OK) { |
| 268 | commit.close(); |
| 269 | return new MapEntryUpdateResult<>(updateStatus, "", key, |
| 270 | oldMapValue, oldMapValue); |
| 271 | } |
| 272 | |
| 273 | byte[] newValue = commit.operation().value(); |
| 274 | long newVersion = versionCounter.incrementAndGet(); |
| 275 | Versioned<byte[]> newMapValue = newValue == null ? null |
| 276 | : new Versioned<>(newValue, newVersion); |
| 277 | |
| 278 | MapEvent.Type updateType = newValue == null ? REMOVE |
| 279 | : oldCommitValue == null ? INSERT : UPDATE; |
| 280 | if (updateType == REMOVE || updateType == UPDATE) { |
| 281 | mapEntries.remove(key); |
| 282 | oldCommitValue.discard(); |
| 283 | } |
| 284 | if (updateType == INSERT || updateType == UPDATE) { |
| 285 | mapEntries.put(key, new NonTransactionalCommit(newVersion, commit)); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 286 | } else { |
| 287 | commit.close(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 288 | } |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 289 | publish(Lists.newArrayList(new MapEvent<>("", key, newMapValue, oldMapValue))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 290 | return new MapEntryUpdateResult<>(updateStatus, "", key, oldMapValue, |
| 291 | newMapValue); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Handles a clear commit. |
| 296 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 297 | * @param commit clear commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 298 | * @return clear result |
| 299 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 300 | protected MapEntryUpdateResult.Status clear(Commit<? extends Clear> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 301 | try { |
| 302 | Iterator<Map.Entry<String, MapEntryValue>> iterator = mapEntries |
| 303 | .entrySet().iterator(); |
| 304 | while (iterator.hasNext()) { |
| 305 | Map.Entry<String, MapEntryValue> entry = iterator.next(); |
| 306 | String key = entry.getKey(); |
| 307 | MapEntryValue value = entry.getValue(); |
| 308 | Versioned<byte[]> removedValue = new Versioned<>(value.value(), |
| 309 | value.version()); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 310 | publish(Lists.newArrayList(new MapEvent<>("", key, null, removedValue))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 311 | value.discard(); |
| 312 | iterator.remove(); |
| 313 | } |
| 314 | return MapEntryUpdateResult.Status.OK; |
| 315 | } finally { |
| 316 | commit.close(); |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Handles a listen commit. |
| 322 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 323 | * @param commit listen commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 324 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 325 | protected void listen(Commit<? extends Listen> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 326 | Long sessionId = commit.session().id(); |
Madan Jampani | e603887 | 2016-03-03 12:14:37 -0800 | [diff] [blame] | 327 | if (listeners.putIfAbsent(sessionId, commit) != null) { |
| 328 | commit.close(); |
| 329 | return; |
| 330 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 331 | commit.session() |
| 332 | .onStateChange( |
| 333 | state -> { |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 334 | if (state == ServerSession.State.CLOSED |
| 335 | || state == ServerSession.State.EXPIRED) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 336 | Commit<? extends Listen> listener = listeners.remove(sessionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 337 | if (listener != null) { |
| 338 | listener.close(); |
| 339 | } |
| 340 | } |
| 341 | }); |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * Handles an unlisten commit. |
| 346 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 347 | * @param commit unlisten commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 348 | */ |
Madan Jampani | 40f022e | 2016-03-02 21:35:14 -0800 | [diff] [blame] | 349 | protected void unlisten(Commit<? extends Unlisten> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 350 | try { |
Madan Jampani | 40f022e | 2016-03-02 21:35:14 -0800 | [diff] [blame] | 351 | Commit<? extends Listen> listener = listeners.remove(commit.session().id()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 352 | if (listener != null) { |
| 353 | listener.close(); |
| 354 | } |
| 355 | } finally { |
| 356 | commit.close(); |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | /** |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 361 | * Handles an prepare and commit commit. |
| 362 | * |
| 363 | * @param commit transaction prepare and commit commit |
| 364 | * @return prepare result |
| 365 | */ |
| 366 | protected PrepareResult prepareAndCommit(Commit<? extends TransactionPrepareAndCommit> commit) { |
| 367 | PrepareResult prepareResult = prepare(commit); |
| 368 | if (prepareResult == PrepareResult.OK) { |
| 369 | commitInternal(commit.operation().transaction().transactionId()); |
| 370 | } |
| 371 | return prepareResult; |
| 372 | } |
| 373 | |
| 374 | /** |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 375 | * Handles an prepare commit. |
| 376 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 377 | * @param commit transaction prepare commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 378 | * @return prepare result |
| 379 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 380 | protected PrepareResult prepare(Commit<? extends TransactionPrepare> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 381 | boolean ok = false; |
| 382 | try { |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 383 | MapTransaction<String, byte[]> transaction = commit.operation().transaction(); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 384 | for (MapUpdate<String, byte[]> update : transaction.updates()) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 385 | String key = update.key(); |
| 386 | if (preparedKeys.contains(key)) { |
| 387 | return PrepareResult.CONCURRENT_TRANSACTION; |
| 388 | } |
| 389 | MapEntryValue existingValue = mapEntries.get(key); |
| 390 | if (existingValue == null) { |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 391 | if (update.type() != MapUpdate.Type.PUT_IF_ABSENT) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 392 | return PrepareResult.OPTIMISTIC_LOCK_FAILURE; |
| 393 | } |
| 394 | } else { |
| 395 | if (existingValue.version() != update.currentVersion()) { |
| 396 | return PrepareResult.OPTIMISTIC_LOCK_FAILURE; |
| 397 | } |
| 398 | } |
| 399 | } |
| 400 | // No violations detected. Add to pendingTranctions and mark |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 401 | // modified keys as locked for updates. |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 402 | pendingTransactions.put(transaction.transactionId(), commit); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 403 | transaction.updates().forEach(u -> preparedKeys.add(u.key())); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 404 | ok = true; |
| 405 | return PrepareResult.OK; |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 406 | } catch (Exception e) { |
| 407 | log.warn("Failure applying {}", commit, e); |
| 408 | throw Throwables.propagate(e); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 409 | } finally { |
| 410 | if (!ok) { |
| 411 | commit.close(); |
| 412 | } |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * Handles an commit commit (ha!). |
| 418 | * |
| 419 | * @param commit transaction commit commit |
| 420 | * @return commit result |
| 421 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 422 | protected CommitResult commit(Commit<? extends TransactionCommit> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 423 | TransactionId transactionId = commit.operation().transactionId(); |
| 424 | try { |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 425 | return commitInternal(transactionId); |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 426 | } catch (Exception e) { |
| 427 | log.warn("Failure applying {}", commit, e); |
| 428 | throw Throwables.propagate(e); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 429 | } finally { |
| 430 | commit.close(); |
| 431 | } |
| 432 | } |
| 433 | |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 434 | private CommitResult commitInternal(TransactionId transactionId) { |
| 435 | Commit<? extends TransactionPrepare> prepareCommit = pendingTransactions |
| 436 | .remove(transactionId); |
| 437 | if (prepareCommit == null) { |
| 438 | return CommitResult.UNKNOWN_TRANSACTION_ID; |
| 439 | } |
| 440 | MapTransaction<String, byte[]> transaction = prepareCommit.operation().transaction(); |
| 441 | long totalReferencesToCommit = transaction |
| 442 | .updates() |
| 443 | .stream() |
| 444 | .filter(update -> update.type() != MapUpdate.Type.REMOVE_IF_VERSION_MATCH) |
| 445 | .count(); |
| 446 | CountDownCompleter<Commit<? extends TransactionPrepare>> completer = |
| 447 | new CountDownCompleter<>(prepareCommit, totalReferencesToCommit, Commit::close); |
| 448 | List<MapEvent<String, byte[]>> eventsToPublish = Lists.newArrayList(); |
| 449 | for (MapUpdate<String, byte[]> update : transaction.updates()) { |
| 450 | String key = update.key(); |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 451 | checkState(preparedKeys.remove(key), "key is not prepared"); |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 452 | MapEntryValue previousValue = mapEntries.remove(key); |
| 453 | MapEntryValue newValue = null; |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 454 | if (update.type() != MapUpdate.Type.REMOVE_IF_VERSION_MATCH) { |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 455 | newValue = new TransactionalCommit(key, versionCounter.incrementAndGet(), completer); |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 456 | } |
| 457 | eventsToPublish.add(new MapEvent<>("", key, toVersioned(newValue), toVersioned(previousValue))); |
| 458 | if (newValue != null) { |
| 459 | mapEntries.put(key, newValue); |
| 460 | } |
| 461 | if (previousValue != null) { |
| 462 | previousValue.discard(); |
| 463 | } |
| 464 | } |
| 465 | publish(eventsToPublish); |
| 466 | return CommitResult.OK; |
| 467 | } |
| 468 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 469 | /** |
| 470 | * Handles an rollback commit (ha!). |
| 471 | * |
| 472 | * @param commit transaction rollback commit |
| 473 | * @return rollback result |
| 474 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 475 | protected RollbackResult rollback(Commit<? extends TransactionRollback> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 476 | TransactionId transactionId = commit.operation().transactionId(); |
| 477 | try { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 478 | Commit<? extends TransactionPrepare> prepareCommit = pendingTransactions.remove(transactionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 479 | if (prepareCommit == null) { |
| 480 | return RollbackResult.UNKNOWN_TRANSACTION_ID; |
| 481 | } else { |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 482 | prepareCommit.operation() |
| 483 | .transaction() |
| 484 | .updates() |
| 485 | .forEach(u -> preparedKeys.remove(u.key())); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 486 | prepareCommit.close(); |
| 487 | return RollbackResult.OK; |
| 488 | } |
| 489 | } finally { |
| 490 | commit.close(); |
| 491 | } |
| 492 | } |
| 493 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 494 | /** |
| 495 | * Computes the update status that would result if the specified update were to applied to |
| 496 | * the state machine. |
| 497 | * |
| 498 | * @param update update |
| 499 | * @return status |
| 500 | */ |
| 501 | private MapEntryUpdateResult.Status validate(UpdateAndGet update) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 502 | MapEntryValue existingValue = mapEntries.get(update.key()); |
| 503 | if (existingValue == null && update.value() == null) { |
| 504 | return MapEntryUpdateResult.Status.NOOP; |
| 505 | } |
| 506 | if (preparedKeys.contains(update.key())) { |
| 507 | return MapEntryUpdateResult.Status.WRITE_LOCK; |
| 508 | } |
| 509 | byte[] existingRawValue = existingValue == null ? null : existingValue |
| 510 | .value(); |
| 511 | Long existingVersion = existingValue == null ? null : existingValue |
| 512 | .version(); |
| 513 | return update.valueMatch().matches(existingRawValue) |
| 514 | && update.versionMatch().matches(existingVersion) ? MapEntryUpdateResult.Status.OK |
| 515 | : MapEntryUpdateResult.Status.PRECONDITION_FAILED; |
| 516 | } |
| 517 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 518 | /** |
| 519 | * Utility for turning a {@code MapEntryValue} to {@code Versioned}. |
| 520 | * @param value map entry value |
| 521 | * @return versioned instance |
| 522 | */ |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 523 | private Versioned<byte[]> toVersioned(MapEntryValue value) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 524 | return value == null ? null : new Versioned<>(value.value(), value.version()); |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * Publishes events to listeners. |
| 529 | * |
| 530 | * @param events list of map event to publish |
| 531 | */ |
| 532 | private void publish(List<MapEvent<String, byte[]>> events) { |
| 533 | listeners.values().forEach(commit -> commit.session().publish(AtomixConsistentMap.CHANGE_SUBJECT, events)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 537 | public void register(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 538 | } |
| 539 | |
| 540 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 541 | public void unregister(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 542 | closeListener(session.id()); |
| 543 | } |
| 544 | |
| 545 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 546 | public void expire(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 547 | closeListener(session.id()); |
| 548 | } |
| 549 | |
| 550 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 551 | public void close(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 552 | closeListener(session.id()); |
| 553 | } |
| 554 | |
| 555 | private void closeListener(Long sessionId) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 556 | Commit<? extends Listen> commit = listeners.remove(sessionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 557 | if (commit != null) { |
| 558 | commit.close(); |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | /** |
| 563 | * Interface implemented by map values. |
| 564 | */ |
| 565 | private interface MapEntryValue { |
| 566 | /** |
| 567 | * Returns the raw {@code byte[]}. |
| 568 | * |
| 569 | * @return raw value |
| 570 | */ |
| 571 | byte[] value(); |
| 572 | |
| 573 | /** |
| 574 | * Returns the version of the value. |
| 575 | * |
| 576 | * @return version |
| 577 | */ |
| 578 | long version(); |
| 579 | |
| 580 | /** |
| 581 | * Discards the value by invoke appropriate clean up actions. |
| 582 | */ |
| 583 | void discard(); |
| 584 | } |
| 585 | |
| 586 | /** |
| 587 | * A {@code MapEntryValue} that is derived from a non-transactional update |
| 588 | * i.e. via any standard map update operation. |
| 589 | */ |
| 590 | private class NonTransactionalCommit implements MapEntryValue { |
| 591 | private final long version; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 592 | private final Commit<? extends UpdateAndGet> commit; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 593 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 594 | public NonTransactionalCommit(long version, Commit<? extends UpdateAndGet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 595 | this.version = version; |
| 596 | this.commit = commit; |
| 597 | } |
| 598 | |
| 599 | @Override |
| 600 | public byte[] value() { |
| 601 | return commit.operation().value(); |
| 602 | } |
| 603 | |
| 604 | @Override |
| 605 | public long version() { |
| 606 | return version; |
| 607 | } |
| 608 | |
| 609 | @Override |
| 610 | public void discard() { |
| 611 | commit.close(); |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | /** |
| 616 | * A {@code MapEntryValue} that is derived from updates submitted via a |
| 617 | * transaction. |
| 618 | */ |
| 619 | private class TransactionalCommit implements MapEntryValue { |
| 620 | private final String key; |
| 621 | private final long version; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 622 | private final CountDownCompleter<Commit<? extends TransactionPrepare>> completer; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 623 | |
| 624 | public TransactionalCommit( |
| 625 | String key, |
| 626 | long version, |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 627 | CountDownCompleter<Commit<? extends TransactionPrepare>> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 628 | this.key = key; |
| 629 | this.version = version; |
| 630 | this.completer = commit; |
| 631 | } |
| 632 | |
| 633 | @Override |
| 634 | public byte[] value() { |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 635 | MapTransaction<String, byte[]> transaction = completer.object().operation().transaction(); |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 636 | return valueForKey(key, transaction); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | @Override |
| 640 | public long version() { |
| 641 | return version; |
| 642 | } |
| 643 | |
| 644 | @Override |
| 645 | public void discard() { |
| 646 | completer.countDown(); |
| 647 | } |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 648 | |
Madan Jampani | 74da78b | 2016-02-09 21:18:36 -0800 | [diff] [blame] | 649 | private byte[] valueForKey(String key, MapTransaction<String, byte[]> transaction) { |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 650 | MapUpdate<String, byte[]> update = transaction.updates() |
| 651 | .stream() |
| 652 | .filter(u -> u.key().equals(key)) |
| 653 | .findFirst() |
| 654 | .orElse(null); |
| 655 | return update == null ? null : update.value(); |
| 656 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 657 | } |
| 658 | } |