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 | |
Madan Jampani | 79924fa | 2016-09-13 13:57:03 -0700 | [diff] [blame] | 18 | import static com.google.common.base.Preconditions.checkState; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 19 | import static org.onosproject.store.service.MapEvent.Type.INSERT; |
| 20 | import static org.onosproject.store.service.MapEvent.Type.REMOVE; |
| 21 | import static org.onosproject.store.service.MapEvent.Type.UPDATE; |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 22 | import static org.slf4j.LoggerFactory.getLogger; |
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; |
Madan Jampani | 79924fa | 2016-09-13 13:57:03 -0700 | [diff] [blame] | 26 | import io.atomix.copycat.server.session.ServerSession; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 27 | import io.atomix.copycat.server.session.SessionListener; |
| 28 | import io.atomix.copycat.server.storage.snapshot.SnapshotReader; |
| 29 | import io.atomix.copycat.server.storage.snapshot.SnapshotWriter; |
| 30 | import io.atomix.resource.ResourceStateMachine; |
| 31 | |
| 32 | import java.util.Collection; |
| 33 | import java.util.HashMap; |
| 34 | import java.util.Iterator; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 35 | import java.util.List; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 36 | import java.util.Map; |
Madan Jampani | 65f24bb | 2016-03-15 15:16:18 -0700 | [diff] [blame] | 37 | import java.util.Properties; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 38 | import java.util.Set; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 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; |
Jordan Halterman | f627244 | 2017-04-20 02:18:08 -0700 | [diff] [blame] | 50 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.GetOrDefault; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 51 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.IsEmpty; |
| 52 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.KeySet; |
| 53 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Listen; |
| 54 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Size; |
Jordan Halterman | 948d659 | 2017-04-20 17:18:24 -0700 | [diff] [blame] | 55 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionBegin; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 56 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionCommit; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 57 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionPrepare; |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 58 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionPrepareAndCommit; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 59 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.TransactionRollback; |
| 60 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Unlisten; |
| 61 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.UpdateAndGet; |
| 62 | import org.onosproject.store.primitives.resources.impl.AtomixConsistentMapCommands.Values; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 63 | import org.onosproject.store.service.MapEvent; |
Jordan Halterman | 948d659 | 2017-04-20 17:18:24 -0700 | [diff] [blame] | 64 | import org.onosproject.store.service.TransactionLog; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 65 | import org.onosproject.store.service.Versioned; |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 66 | import org.slf4j.Logger; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 67 | |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 68 | import com.google.common.base.Throwables; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 69 | import com.google.common.collect.Lists; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 70 | import com.google.common.collect.Maps; |
| 71 | import com.google.common.collect.Sets; |
| 72 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 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 | 79924fa | 2016-09-13 13:57:03 -0700 | [diff] [blame] | 79 | private final Map<Long, Commit<? extends Listen>> listeners = new HashMap<>(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 80 | private final Map<String, MapEntryValue> mapEntries = new HashMap<>(); |
| 81 | private final Set<String> preparedKeys = Sets.newHashSet(); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 82 | private final Map<TransactionId, TransactionScope> activeTransactions = Maps.newHashMap(); |
| 83 | private long currentVersion; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 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) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | @Override |
| 94 | public void install(SnapshotReader reader) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | @Override |
| 98 | protected void configure(StateMachineExecutor executor) { |
| 99 | // Listeners |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 100 | executor.register(Listen.class, this::listen); |
| 101 | executor.register(Unlisten.class, this::unlisten); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 102 | // Queries |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 103 | executor.register(ContainsKey.class, this::containsKey); |
| 104 | executor.register(ContainsValue.class, this::containsValue); |
| 105 | executor.register(EntrySet.class, this::entrySet); |
| 106 | executor.register(Get.class, this::get); |
Jordan Halterman | f627244 | 2017-04-20 02:18:08 -0700 | [diff] [blame] | 107 | executor.register(GetOrDefault.class, this::getOrDefault); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 108 | executor.register(IsEmpty.class, this::isEmpty); |
| 109 | executor.register(KeySet.class, this::keySet); |
| 110 | executor.register(Size.class, this::size); |
| 111 | executor.register(Values.class, this::values); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 112 | // Commands |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 113 | executor.register(UpdateAndGet.class, this::updateAndGet); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 114 | executor.register(AtomixConsistentMapCommands.Clear.class, this::clear); |
Jordan Halterman | 948d659 | 2017-04-20 17:18:24 -0700 | [diff] [blame] | 115 | executor.register(TransactionBegin.class, this::begin); |
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 { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 141 | MapEntryValue value = mapEntries.get(commit.operation().key()); |
| 142 | return value != null && value.type() != MapEntryValue.Type.TOMBSTONE; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 143 | } finally { |
| 144 | commit.close(); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Handles a contains value commit. |
| 150 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 151 | * @param commit containsValue commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 152 | * @return {@code true} if map contains value |
| 153 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 154 | protected boolean containsValue(Commit<? extends ContainsValue> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 155 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 156 | Match<byte[]> valueMatch = Match.ifValue(commit.operation().value()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 157 | return mapEntries.values().stream() |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 158 | .filter(value -> value.type() != MapEntryValue.Type.TOMBSTONE) |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 159 | .anyMatch(value -> valueMatch.matches(value.value())); |
| 160 | } finally { |
| 161 | commit.close(); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Handles a get commit. |
| 167 | * |
Jordan Halterman | f627244 | 2017-04-20 02:18:08 -0700 | [diff] [blame] | 168 | * @param commit get commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 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 | /** |
Jordan Halterman | f627244 | 2017-04-20 02:18:08 -0700 | [diff] [blame] | 180 | * Handles a get or default commit. |
| 181 | * |
| 182 | * @param commit get or default commit |
| 183 | * @return value mapped to key |
| 184 | */ |
| 185 | protected Versioned<byte[]> getOrDefault(Commit<? extends GetOrDefault> commit) { |
| 186 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 187 | MapEntryValue value = mapEntries.get(commit.operation().key()); |
| 188 | if (value == null) { |
| 189 | return new Versioned<>(commit.operation().defaultValue(), 0); |
| 190 | } else if (value.type() == MapEntryValue.Type.TOMBSTONE) { |
| 191 | return new Versioned<>(commit.operation().defaultValue(), value.version); |
| 192 | } else { |
| 193 | return new Versioned<>(value.value(), value.version); |
| 194 | } |
Jordan Halterman | f627244 | 2017-04-20 02:18:08 -0700 | [diff] [blame] | 195 | } finally { |
| 196 | commit.close(); |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | /** |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 201 | * Handles a count commit. |
| 202 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 203 | * @param commit size commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 204 | * @return number of entries in map |
| 205 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 206 | protected int size(Commit<? extends Size> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 207 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 208 | return (int) mapEntries.values().stream() |
| 209 | .filter(value -> value.type() != MapEntryValue.Type.TOMBSTONE) |
| 210 | .count(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 211 | } finally { |
| 212 | commit.close(); |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | /** |
| 217 | * Handles an is empty commit. |
| 218 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 219 | * @param commit isEmpty commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 220 | * @return {@code true} if map is empty |
| 221 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 222 | protected boolean isEmpty(Commit<? extends IsEmpty> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 223 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 224 | return mapEntries.values().stream() |
| 225 | .noneMatch(value -> value.type() != MapEntryValue.Type.TOMBSTONE); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 226 | } finally { |
| 227 | commit.close(); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Handles a keySet commit. |
| 233 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 234 | * @param commit keySet commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 235 | * @return set of keys in map |
| 236 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 237 | protected Set<String> keySet(Commit<? extends KeySet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 238 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 239 | return mapEntries.entrySet().stream() |
| 240 | .filter(entry -> entry.getValue().type() != MapEntryValue.Type.TOMBSTONE) |
| 241 | .map(Map.Entry::getKey) |
| 242 | .collect(Collectors.toSet()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 243 | } finally { |
| 244 | commit.close(); |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * Handles a values commit. |
| 250 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 251 | * @param commit values commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 252 | * @return collection of values in map |
| 253 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 254 | protected Collection<Versioned<byte[]>> values(Commit<? extends Values> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 255 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 256 | return mapEntries.entrySet().stream() |
| 257 | .filter(entry -> entry.getValue().type() != MapEntryValue.Type.TOMBSTONE) |
| 258 | .map(entry -> toVersioned(entry.getValue())) |
| 259 | .collect(Collectors.toList()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 260 | } finally { |
| 261 | commit.close(); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Handles a entry set commit. |
| 267 | * |
| 268 | * @param commit |
| 269 | * entrySet commit |
| 270 | * @return set of map entries |
| 271 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 272 | protected Set<Map.Entry<String, Versioned<byte[]>>> entrySet(Commit<? extends EntrySet> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 273 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 274 | return mapEntries.entrySet().stream() |
| 275 | .filter(entry -> entry.getValue().type() != MapEntryValue.Type.TOMBSTONE) |
| 276 | .map(e -> Maps.immutableEntry(e.getKey(), toVersioned(e.getValue()))) |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 277 | .collect(Collectors.toSet()); |
| 278 | } finally { |
| 279 | commit.close(); |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * Handles a update and get commit. |
| 285 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 286 | * @param commit updateAndGet commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 287 | * @return update result |
| 288 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 289 | protected MapEntryUpdateResult<String, byte[]> updateAndGet(Commit<? extends UpdateAndGet> commit) { |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 290 | try { |
| 291 | MapEntryUpdateResult.Status updateStatus = validate(commit.operation()); |
| 292 | String key = commit.operation().key(); |
| 293 | MapEntryValue oldCommitValue = mapEntries.get(commit.operation().key()); |
| 294 | Versioned<byte[]> oldMapValue = toVersioned(oldCommitValue); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 295 | |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 296 | if (updateStatus != MapEntryUpdateResult.Status.OK) { |
| 297 | commit.close(); |
Jordan Halterman | e5ce145 | 2017-05-09 12:15:22 -0700 | [diff] [blame] | 298 | return new MapEntryUpdateResult<>(updateStatus, "", key, oldMapValue, oldMapValue); |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 299 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 300 | |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 301 | byte[] newValue = commit.operation().value(); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 302 | currentVersion = commit.index(); |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 303 | Versioned<byte[]> newMapValue = newValue == null ? null |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 304 | : new Versioned<>(newValue, currentVersion); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 305 | |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 306 | MapEvent.Type updateType = newValue == null ? REMOVE |
| 307 | : oldCommitValue == null ? INSERT : UPDATE; |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 308 | |
| 309 | // If a value existed in the map, remove and discard the value to ensure disk can be freed. |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 310 | if (updateType == REMOVE || updateType == UPDATE) { |
| 311 | mapEntries.remove(key); |
| 312 | oldCommitValue.discard(); |
| 313 | } |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 314 | |
| 315 | // If this is an insert/update commit, add the commit to the map entries. |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 316 | if (updateType == INSERT || updateType == UPDATE) { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 317 | mapEntries.put(key, new NonTransactionalCommit(commit)); |
| 318 | } else if (!activeTransactions.isEmpty()) { |
| 319 | // If this is a delete but transactions are currently running, ensure tombstones are retained |
| 320 | // for version checks. |
| 321 | TombstoneCommit tombstone = new TombstoneCommit( |
| 322 | commit.index(), |
| 323 | new CountDownCompleter<>(commit, 1, Commit::close)); |
| 324 | mapEntries.put(key, tombstone); |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 325 | } else { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 326 | // If no transactions are in progress, we can safely delete the key from memory. |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 327 | commit.close(); |
| 328 | } |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 329 | |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 330 | publish(Lists.newArrayList(new MapEvent<>("", key, newMapValue, oldMapValue))); |
Jordan Halterman | e5ce145 | 2017-05-09 12:15:22 -0700 | [diff] [blame] | 331 | return new MapEntryUpdateResult<>(updateStatus, "", key, oldMapValue, newMapValue); |
Madan Jampani | ea98f41 | 2016-06-22 09:05:40 -0700 | [diff] [blame] | 332 | } catch (Exception e) { |
| 333 | log.error("State machine operation failed", e); |
| 334 | throw Throwables.propagate(e); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 335 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | /** |
| 339 | * Handles a clear commit. |
| 340 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 341 | * @param commit clear commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 342 | * @return clear result |
| 343 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 344 | protected MapEntryUpdateResult.Status clear(Commit<? extends Clear> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 345 | try { |
| 346 | Iterator<Map.Entry<String, MapEntryValue>> iterator = mapEntries |
| 347 | .entrySet().iterator(); |
| 348 | while (iterator.hasNext()) { |
| 349 | Map.Entry<String, MapEntryValue> entry = iterator.next(); |
| 350 | String key = entry.getKey(); |
| 351 | MapEntryValue value = entry.getValue(); |
| 352 | Versioned<byte[]> removedValue = new Versioned<>(value.value(), |
| 353 | value.version()); |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 354 | publish(Lists.newArrayList(new MapEvent<>("", key, null, removedValue))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 355 | value.discard(); |
| 356 | iterator.remove(); |
| 357 | } |
| 358 | return MapEntryUpdateResult.Status.OK; |
| 359 | } finally { |
| 360 | commit.close(); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * Handles a listen commit. |
| 366 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 367 | * @param commit listen commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 368 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 369 | protected void listen(Commit<? extends Listen> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 370 | Long sessionId = commit.session().id(); |
Madan Jampani | e603887 | 2016-03-03 12:14:37 -0800 | [diff] [blame] | 371 | if (listeners.putIfAbsent(sessionId, commit) != null) { |
| 372 | commit.close(); |
| 373 | return; |
| 374 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 375 | commit.session() |
| 376 | .onStateChange( |
| 377 | state -> { |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 378 | if (state == ServerSession.State.CLOSED |
| 379 | || state == ServerSession.State.EXPIRED) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 380 | Commit<? extends Listen> listener = listeners.remove(sessionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 381 | if (listener != null) { |
| 382 | listener.close(); |
| 383 | } |
| 384 | } |
| 385 | }); |
| 386 | } |
| 387 | |
| 388 | /** |
| 389 | * Handles an unlisten commit. |
| 390 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 391 | * @param commit unlisten commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 392 | */ |
Madan Jampani | 40f022e | 2016-03-02 21:35:14 -0800 | [diff] [blame] | 393 | protected void unlisten(Commit<? extends Unlisten> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 394 | try { |
Madan Jampani | 40f022e | 2016-03-02 21:35:14 -0800 | [diff] [blame] | 395 | Commit<? extends Listen> listener = listeners.remove(commit.session().id()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 396 | if (listener != null) { |
| 397 | listener.close(); |
| 398 | } |
| 399 | } finally { |
| 400 | commit.close(); |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | /** |
Jordan Halterman | 948d659 | 2017-04-20 17:18:24 -0700 | [diff] [blame] | 405 | * Handles a begin commit. |
| 406 | * |
| 407 | * @param commit transaction begin commit |
| 408 | * @return transaction state version |
| 409 | */ |
| 410 | protected long begin(Commit<? extends TransactionBegin> commit) { |
| 411 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 412 | long version = commit.index(); |
| 413 | activeTransactions.put(commit.operation().transactionId(), new TransactionScope(version)); |
| 414 | return version; |
Jordan Halterman | 948d659 | 2017-04-20 17:18:24 -0700 | [diff] [blame] | 415 | } finally { |
| 416 | commit.close(); |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | /** |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 421 | * Handles an prepare and commit commit. |
| 422 | * |
| 423 | * @param commit transaction prepare and commit commit |
| 424 | * @return prepare result |
| 425 | */ |
| 426 | protected PrepareResult prepareAndCommit(Commit<? extends TransactionPrepareAndCommit> commit) { |
Jordan Halterman | 881e450 | 2017-05-10 13:46:55 -0700 | [diff] [blame] | 427 | TransactionId transactionId = commit.operation().transactionLog().transactionId(); |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 428 | PrepareResult prepareResult = prepare(commit); |
Jordan Halterman | 881e450 | 2017-05-10 13:46:55 -0700 | [diff] [blame] | 429 | TransactionScope transactionScope = activeTransactions.remove(transactionId); |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 430 | if (prepareResult == PrepareResult.OK) { |
Jordan Halterman | 881e450 | 2017-05-10 13:46:55 -0700 | [diff] [blame] | 431 | this.currentVersion = commit.index(); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 432 | transactionScope = transactionScope.prepared(commit); |
| 433 | commit(transactionScope); |
Jordan Halterman | 881e450 | 2017-05-10 13:46:55 -0700 | [diff] [blame] | 434 | } else if (transactionScope != null) { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 435 | transactionScope.close(); |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 436 | } |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 437 | discardTombstones(); |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 438 | return prepareResult; |
| 439 | } |
| 440 | |
| 441 | /** |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 442 | * Handles an prepare commit. |
| 443 | * |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 444 | * @param commit transaction prepare commit |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 445 | * @return prepare result |
| 446 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 447 | protected PrepareResult prepare(Commit<? extends TransactionPrepare> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 448 | boolean ok = false; |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 449 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 450 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 451 | TransactionLog<MapUpdate<String, byte[]>> transactionLog = commit.operation().transactionLog(); |
| 452 | |
| 453 | // Iterate through records in the transaction log and perform isolation checks. |
| 454 | for (MapUpdate<String, byte[]> record : transactionLog.records()) { |
| 455 | String key = record.key(); |
| 456 | |
| 457 | // If the record is a VERSION_MATCH then check that the record's version matches the current |
| 458 | // version of the state machine. |
| 459 | if (record.type() == MapUpdate.Type.VERSION_MATCH && key == null) { |
| 460 | if (record.version() > currentVersion) { |
| 461 | return PrepareResult.OPTIMISTIC_LOCK_FAILURE; |
| 462 | } else { |
| 463 | continue; |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | // If the prepared keys already contains the key contained within the record, that indicates a |
| 468 | // conflict with a concurrent transaction. |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 469 | if (preparedKeys.contains(key)) { |
| 470 | return PrepareResult.CONCURRENT_TRANSACTION; |
| 471 | } |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 472 | |
| 473 | // Read the existing value from the map. |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 474 | MapEntryValue existingValue = mapEntries.get(key); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 475 | |
| 476 | // Note: if the existing value is null, that means the key has not changed during the transaction, |
| 477 | // otherwise a tombstone would have been retained. |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 478 | if (existingValue == null) { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 479 | // If the value is null, ensure the version is equal to the transaction version. |
| 480 | if (record.version() != transactionLog.version()) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 481 | return PrepareResult.OPTIMISTIC_LOCK_FAILURE; |
| 482 | } |
| 483 | } else { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 484 | // If the value is non-null, compare the current version with the record version. |
| 485 | if (existingValue.version() > record.version()) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 486 | return PrepareResult.OPTIMISTIC_LOCK_FAILURE; |
| 487 | } |
| 488 | } |
| 489 | } |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 490 | |
| 491 | // No violations detected. Mark modified keys locked for transactions. |
| 492 | transactionLog.records().forEach(record -> { |
| 493 | if (record.type() != MapUpdate.Type.VERSION_MATCH) { |
| 494 | preparedKeys.add(record.key()); |
| 495 | } |
| 496 | }); |
| 497 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 498 | ok = true; |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 499 | |
| 500 | // Update the transaction scope. If the transaction scope is not set on this node, that indicates the |
| 501 | // coordinator is communicating with another node. Transactions assume that the client is communicating |
| 502 | // with a single leader in order to limit the overhead of retaining tombstones. |
| 503 | TransactionScope transactionScope = activeTransactions.get(transactionLog.transactionId()); |
| 504 | if (transactionScope == null) { |
| 505 | activeTransactions.put( |
| 506 | transactionLog.transactionId(), |
| 507 | new TransactionScope(transactionLog.version(), commit)); |
| 508 | return PrepareResult.PARTIAL_FAILURE; |
| 509 | } else { |
| 510 | activeTransactions.put( |
| 511 | transactionLog.transactionId(), |
| 512 | transactionScope.prepared(commit)); |
| 513 | return PrepareResult.OK; |
| 514 | } |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 515 | } catch (Exception e) { |
| 516 | log.warn("Failure applying {}", commit, e); |
| 517 | throw Throwables.propagate(e); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 518 | } finally { |
| 519 | if (!ok) { |
| 520 | commit.close(); |
| 521 | } |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | /** |
| 526 | * Handles an commit commit (ha!). |
| 527 | * |
| 528 | * @param commit transaction commit commit |
| 529 | * @return commit result |
| 530 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 531 | protected CommitResult commit(Commit<? extends TransactionCommit> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 532 | TransactionId transactionId = commit.operation().transactionId(); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 533 | TransactionScope transactionScope = activeTransactions.remove(transactionId); |
| 534 | if (transactionScope == null) { |
| 535 | return CommitResult.UNKNOWN_TRANSACTION_ID; |
| 536 | } |
| 537 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 538 | try { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 539 | this.currentVersion = commit.index(); |
| 540 | return commit(transactionScope.committed(commit)); |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 541 | } catch (Exception e) { |
| 542 | log.warn("Failure applying {}", commit, e); |
| 543 | throw Throwables.propagate(e); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 544 | } finally { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 545 | discardTombstones(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 546 | } |
| 547 | } |
| 548 | |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 549 | /** |
| 550 | * Applies committed operations to the state machine. |
| 551 | */ |
| 552 | private CommitResult commit(TransactionScope transactionScope) { |
| 553 | TransactionLog<MapUpdate<String, byte[]>> transactionLog = transactionScope.transactionLog(); |
| 554 | boolean retainTombstones = !activeTransactions.isEmpty(); |
| 555 | |
| 556 | // Count the total number of keys that will be set by this transaction. This is necessary to do reference |
| 557 | // counting for garbage collection. |
| 558 | long totalReferencesToCommit = transactionLog.records().stream() |
| 559 | // No keys are set for version checks. For deletes, references are only retained of tombstones |
| 560 | // need to be retained for concurrent transactions. |
| 561 | .filter(record -> record.type() != MapUpdate.Type.VERSION_MATCH && record.type() != MapUpdate.Type.LOCK |
| 562 | && (record.type() != MapUpdate.Type.REMOVE_IF_VERSION_MATCH || retainTombstones)) |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 563 | .count(); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 564 | |
| 565 | // Create a count down completer that counts references to the transaction commit for garbage collection. |
| 566 | CountDownCompleter<TransactionScope> completer = new CountDownCompleter<>( |
| 567 | transactionScope, totalReferencesToCommit, TransactionScope::close); |
| 568 | |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 569 | List<MapEvent<String, byte[]>> eventsToPublish = Lists.newArrayList(); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 570 | for (MapUpdate<String, byte[]> record : transactionLog.records()) { |
| 571 | if (record.type() == MapUpdate.Type.VERSION_MATCH) { |
| 572 | continue; |
| 573 | } |
| 574 | |
| 575 | String key = record.key(); |
HIGUCHI Yuta | caad26b | 2016-04-16 16:06:11 -0700 | [diff] [blame] | 576 | checkState(preparedKeys.remove(key), "key is not prepared"); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 577 | |
| 578 | if (record.type() == MapUpdate.Type.LOCK) { |
| 579 | continue; |
| 580 | } |
| 581 | |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 582 | MapEntryValue previousValue = mapEntries.remove(key); |
| 583 | MapEntryValue newValue = null; |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 584 | |
| 585 | // If the record is not a delete, create a transactional commit. |
| 586 | if (record.type() != MapUpdate.Type.REMOVE_IF_VERSION_MATCH) { |
| 587 | newValue = new TransactionalCommit(currentVersion, record.value(), completer); |
| 588 | } else if (retainTombstones) { |
| 589 | // For deletes, if tombstones need to be retained then create and store a tombstone commit. |
| 590 | newValue = new TombstoneCommit(currentVersion, completer); |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 591 | } |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 592 | |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 593 | eventsToPublish.add(new MapEvent<>("", key, toVersioned(newValue), toVersioned(previousValue))); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 594 | |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 595 | if (newValue != null) { |
| 596 | mapEntries.put(key, newValue); |
| 597 | } |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 598 | |
Madan Jampani | 542d9e2 | 2016-04-05 15:39:55 -0700 | [diff] [blame] | 599 | if (previousValue != null) { |
| 600 | previousValue.discard(); |
| 601 | } |
| 602 | } |
| 603 | publish(eventsToPublish); |
| 604 | return CommitResult.OK; |
| 605 | } |
| 606 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 607 | /** |
| 608 | * Handles an rollback commit (ha!). |
| 609 | * |
| 610 | * @param commit transaction rollback commit |
| 611 | * @return rollback result |
| 612 | */ |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 613 | protected RollbackResult rollback(Commit<? extends TransactionRollback> commit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 614 | TransactionId transactionId = commit.operation().transactionId(); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 615 | TransactionScope transactionScope = activeTransactions.remove(transactionId); |
| 616 | if (transactionScope == null) { |
| 617 | return RollbackResult.UNKNOWN_TRANSACTION_ID; |
| 618 | } else if (!transactionScope.isPrepared()) { |
| 619 | discardTombstones(); |
| 620 | transactionScope.close(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 621 | commit.close(); |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 622 | return RollbackResult.OK; |
| 623 | } else { |
| 624 | try { |
| 625 | transactionScope.transactionLog().records() |
| 626 | .forEach(record -> { |
| 627 | if (record.type() != MapUpdate.Type.VERSION_MATCH) { |
| 628 | preparedKeys.remove(record.key()); |
| 629 | } |
| 630 | }); |
| 631 | return RollbackResult.OK; |
| 632 | } finally { |
| 633 | discardTombstones(); |
| 634 | transactionScope.close(); |
| 635 | commit.close(); |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | } |
| 640 | |
| 641 | /** |
| 642 | * Discards tombstones no longer needed by active transactions. |
| 643 | */ |
| 644 | private void discardTombstones() { |
| 645 | if (activeTransactions.isEmpty()) { |
| 646 | Iterator<Map.Entry<String, MapEntryValue>> iterator = mapEntries.entrySet().iterator(); |
| 647 | while (iterator.hasNext()) { |
| 648 | MapEntryValue value = iterator.next().getValue(); |
| 649 | if (value.type() == MapEntryValue.Type.TOMBSTONE) { |
| 650 | iterator.remove(); |
| 651 | value.discard(); |
| 652 | } |
| 653 | } |
| 654 | } else { |
| 655 | long lowWaterMark = activeTransactions.values().stream() |
| 656 | .mapToLong(TransactionScope::version) |
| 657 | .min().getAsLong(); |
| 658 | Iterator<Map.Entry<String, MapEntryValue>> iterator = mapEntries.entrySet().iterator(); |
| 659 | while (iterator.hasNext()) { |
| 660 | MapEntryValue value = iterator.next().getValue(); |
| 661 | if (value.type() == MapEntryValue.Type.TOMBSTONE && value.version < lowWaterMark) { |
| 662 | iterator.remove(); |
| 663 | value.discard(); |
| 664 | } |
| 665 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 666 | } |
| 667 | } |
| 668 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 669 | /** |
| 670 | * Computes the update status that would result if the specified update were to applied to |
| 671 | * the state machine. |
| 672 | * |
| 673 | * @param update update |
| 674 | * @return status |
| 675 | */ |
| 676 | private MapEntryUpdateResult.Status validate(UpdateAndGet update) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 677 | MapEntryValue existingValue = mapEntries.get(update.key()); |
Jordan Halterman | e5ce145 | 2017-05-09 12:15:22 -0700 | [diff] [blame] | 678 | boolean isEmpty = existingValue == null || existingValue.type() == MapEntryValue.Type.TOMBSTONE; |
| 679 | if (isEmpty && update.value() == null) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 680 | return MapEntryUpdateResult.Status.NOOP; |
| 681 | } |
| 682 | if (preparedKeys.contains(update.key())) { |
| 683 | return MapEntryUpdateResult.Status.WRITE_LOCK; |
| 684 | } |
Jordan Halterman | e5ce145 | 2017-05-09 12:15:22 -0700 | [diff] [blame] | 685 | byte[] existingRawValue = isEmpty ? null : existingValue.value(); |
| 686 | Long existingVersion = isEmpty ? null : existingValue.version(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 687 | return update.valueMatch().matches(existingRawValue) |
| 688 | && update.versionMatch().matches(existingVersion) ? MapEntryUpdateResult.Status.OK |
| 689 | : MapEntryUpdateResult.Status.PRECONDITION_FAILED; |
| 690 | } |
| 691 | |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 692 | /** |
| 693 | * Utility for turning a {@code MapEntryValue} to {@code Versioned}. |
| 694 | * @param value map entry value |
| 695 | * @return versioned instance |
| 696 | */ |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 697 | private Versioned<byte[]> toVersioned(MapEntryValue value) { |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 698 | return value != null && value.type() != MapEntryValue.Type.TOMBSTONE |
| 699 | ? new Versioned<>(value.value(), value.version()) : null; |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 700 | } |
| 701 | |
| 702 | /** |
| 703 | * Publishes events to listeners. |
| 704 | * |
| 705 | * @param events list of map event to publish |
| 706 | */ |
| 707 | private void publish(List<MapEvent<String, byte[]>> events) { |
| 708 | listeners.values().forEach(commit -> commit.session().publish(AtomixConsistentMap.CHANGE_SUBJECT, events)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 712 | public void register(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 716 | public void unregister(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 717 | closeListener(session.id()); |
| 718 | } |
| 719 | |
| 720 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 721 | public void expire(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 722 | closeListener(session.id()); |
| 723 | } |
| 724 | |
| 725 | @Override |
Madan Jampani | 3a9911c | 2016-02-21 11:25:45 -0800 | [diff] [blame] | 726 | public void close(ServerSession session) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 727 | closeListener(session.id()); |
| 728 | } |
| 729 | |
| 730 | private void closeListener(Long sessionId) { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 731 | Commit<? extends Listen> commit = listeners.remove(sessionId); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 732 | if (commit != null) { |
| 733 | commit.close(); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | /** |
| 738 | * Interface implemented by map values. |
| 739 | */ |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 740 | private abstract static class MapEntryValue { |
| 741 | protected final Type type; |
| 742 | protected final long version; |
| 743 | |
| 744 | MapEntryValue(Type type, long version) { |
| 745 | this.type = type; |
| 746 | this.version = version; |
| 747 | } |
| 748 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 749 | /** |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 750 | * Returns the value type. |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 751 | * |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 752 | * @return the value type |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 753 | */ |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 754 | Type type() { |
| 755 | return type; |
| 756 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 757 | |
| 758 | /** |
| 759 | * Returns the version of the value. |
| 760 | * |
| 761 | * @return version |
| 762 | */ |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 763 | long version() { |
| 764 | return version; |
| 765 | } |
| 766 | |
| 767 | /** |
| 768 | * Returns the raw {@code byte[]}. |
| 769 | * |
| 770 | * @return raw value |
| 771 | */ |
| 772 | abstract byte[] value(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 773 | |
| 774 | /** |
| 775 | * Discards the value by invoke appropriate clean up actions. |
| 776 | */ |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 777 | abstract void discard(); |
| 778 | |
| 779 | /** |
| 780 | * Value type. |
| 781 | */ |
| 782 | enum Type { |
| 783 | VALUE, |
| 784 | TOMBSTONE, |
| 785 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 786 | } |
| 787 | |
| 788 | /** |
| 789 | * A {@code MapEntryValue} that is derived from a non-transactional update |
| 790 | * i.e. via any standard map update operation. |
| 791 | */ |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 792 | private static class NonTransactionalCommit extends MapEntryValue { |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 793 | private final Commit<? extends UpdateAndGet> commit; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 794 | |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 795 | NonTransactionalCommit(Commit<? extends UpdateAndGet> commit) { |
| 796 | super(Type.VALUE, commit.index()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 797 | this.commit = commit; |
| 798 | } |
| 799 | |
| 800 | @Override |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 801 | byte[] value() { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 802 | return commit.operation().value(); |
| 803 | } |
| 804 | |
| 805 | @Override |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 806 | void discard() { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 807 | commit.close(); |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | /** |
| 812 | * A {@code MapEntryValue} that is derived from updates submitted via a |
| 813 | * transaction. |
| 814 | */ |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 815 | private static class TransactionalCommit extends MapEntryValue { |
| 816 | private final byte[] value; |
| 817 | private final CountDownCompleter<?> completer; |
| 818 | |
| 819 | TransactionalCommit(long version, byte[] value, CountDownCompleter<?> completer) { |
| 820 | super(Type.VALUE, version); |
| 821 | this.value = value; |
| 822 | this.completer = completer; |
| 823 | } |
| 824 | |
| 825 | @Override |
| 826 | byte[] value() { |
| 827 | return value; |
| 828 | } |
| 829 | |
| 830 | @Override |
| 831 | void discard() { |
| 832 | completer.countDown(); |
| 833 | } |
| 834 | } |
| 835 | |
| 836 | /** |
| 837 | * A {@code MapEntryValue} that represents a deleted entry. |
| 838 | */ |
| 839 | private static class TombstoneCommit extends MapEntryValue { |
| 840 | private final CountDownCompleter<?> completer; |
| 841 | |
| 842 | public TombstoneCommit(long version, CountDownCompleter<?> completer) { |
| 843 | super(Type.TOMBSTONE, version); |
| 844 | this.completer = completer; |
| 845 | } |
| 846 | |
| 847 | @Override |
| 848 | byte[] value() { |
| 849 | throw new UnsupportedOperationException(); |
| 850 | } |
| 851 | |
| 852 | @Override |
| 853 | void discard() { |
| 854 | completer.countDown(); |
| 855 | } |
| 856 | } |
| 857 | |
| 858 | /** |
| 859 | * Map transaction scope. |
| 860 | */ |
| 861 | private static final class TransactionScope { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 862 | private final long version; |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 863 | private final Commit<? extends TransactionPrepare> prepareCommit; |
| 864 | private final Commit<? extends TransactionCommit> commitCommit; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 865 | |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 866 | private TransactionScope(long version) { |
| 867 | this(version, null, null); |
| 868 | } |
| 869 | |
| 870 | private TransactionScope( |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 871 | long version, |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 872 | Commit<? extends TransactionPrepare> prepareCommit) { |
| 873 | this(version, prepareCommit, null); |
| 874 | } |
| 875 | |
| 876 | private TransactionScope( |
| 877 | long version, |
| 878 | Commit<? extends TransactionPrepare> prepareCommit, |
| 879 | Commit<? extends TransactionCommit> commitCommit) { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 880 | this.version = version; |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 881 | this.prepareCommit = prepareCommit; |
| 882 | this.commitCommit = commitCommit; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 883 | } |
| 884 | |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 885 | /** |
| 886 | * Returns the transaction version. |
| 887 | * |
| 888 | * @return the transaction version |
| 889 | */ |
| 890 | long version() { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 891 | return version; |
| 892 | } |
| 893 | |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 894 | /** |
| 895 | * Returns whether this is a prepared transaction scope. |
| 896 | * |
| 897 | * @return whether this is a prepared transaction scope |
| 898 | */ |
| 899 | boolean isPrepared() { |
| 900 | return prepareCommit != null; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 901 | } |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 902 | |
Jordan Halterman | 5f97a30 | 2017-04-26 23:41:31 -0700 | [diff] [blame] | 903 | /** |
| 904 | * Returns the transaction commit log. |
| 905 | * |
| 906 | * @return the transaction commit log |
| 907 | */ |
| 908 | TransactionLog<MapUpdate<String, byte[]>> transactionLog() { |
| 909 | checkState(isPrepared()); |
| 910 | return prepareCommit.operation().transactionLog(); |
| 911 | } |
| 912 | |
| 913 | /** |
| 914 | * Returns a new transaction scope with a prepare commit. |
| 915 | * |
| 916 | * @param commit the prepare commit |
| 917 | * @return new transaction scope updated with the prepare commit |
| 918 | */ |
| 919 | TransactionScope prepared(Commit<? extends TransactionPrepare> commit) { |
| 920 | return new TransactionScope(version, commit); |
| 921 | } |
| 922 | |
| 923 | /** |
| 924 | * Returns a new transaction scope with a commit commit. |
| 925 | * |
| 926 | * @param commit the commit commit ;-) |
| 927 | * @return new transaction scope updated with the commit commit |
| 928 | */ |
| 929 | TransactionScope committed(Commit<? extends TransactionCommit> commit) { |
| 930 | checkState(isPrepared()); |
| 931 | return new TransactionScope(version, prepareCommit, commit); |
| 932 | } |
| 933 | |
| 934 | /** |
| 935 | * Closes the transaction and all associated commits. |
| 936 | */ |
| 937 | void close() { |
| 938 | if (prepareCommit != null) { |
| 939 | prepareCommit.close(); |
| 940 | } |
| 941 | if (commitCommit != null) { |
| 942 | commitCommit.close(); |
| 943 | } |
Madan Jampani | cadd70b | 2016-02-08 13:45:43 -0800 | [diff] [blame] | 944 | } |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 945 | } |
| 946 | } |