Madan Jampani | 2546111 | 2015-02-17 14:17:29 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 17 | package org.onosproject.store.consistent.impl; |
| 18 | |
| 19 | import java.util.Arrays; |
| 20 | import java.util.Collection; |
Madan Jampani | a89f8f9 | 2015-04-01 14:39:54 -0700 | [diff] [blame] | 21 | import java.util.HashSet; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 22 | import java.util.LinkedList; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 23 | import java.util.Map; |
| 24 | import java.util.Map.Entry; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 25 | import java.util.Queue; |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 26 | import java.util.concurrent.atomic.AtomicLong; |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 27 | import java.util.stream.Collectors; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 28 | import java.util.Set; |
| 29 | |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 30 | import org.apache.commons.lang3.tuple.Pair; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 31 | import org.onosproject.cluster.NodeId; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 32 | import org.onosproject.store.service.DatabaseUpdate; |
| 33 | import org.onosproject.store.service.Transaction; |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 34 | import org.onosproject.store.service.Versioned; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 35 | import org.onosproject.store.service.DatabaseUpdate.Type; |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 36 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 37 | import com.google.common.base.Objects; |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 38 | import com.google.common.collect.ImmutableList; |
| 39 | import com.google.common.collect.ImmutableSet; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 40 | import com.google.common.collect.Maps; |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 41 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 42 | import net.kuujo.copycat.state.Initializer; |
| 43 | import net.kuujo.copycat.state.StateContext; |
| 44 | |
| 45 | /** |
| 46 | * Default database state. |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 47 | */ |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 48 | public class DefaultDatabaseState implements DatabaseState<String, byte[]> { |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 49 | private Long nextVersion; |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 50 | private Map<String, AtomicLong> counters; |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 51 | private Map<String, Map<String, Versioned<byte[]>>> maps; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 52 | private Map<String, Queue<byte[]>> queues; |
| 53 | private Map<String, Set<NodeId>> queueUpdateNotificationTargets; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 54 | |
| 55 | /** |
| 56 | * This locks map has a structure similar to the "tables" map above and |
| 57 | * holds all the provisional updates made during a transaction's prepare phase. |
| 58 | * The entry value is represented as the tuple: (transactionId, newValue) |
| 59 | * If newValue == null that signifies this update is attempting to |
| 60 | * delete the existing value. |
| 61 | * This map also serves as a lock on the entries that are being updated. |
| 62 | * The presence of a entry in this map indicates that element is |
| 63 | * participating in a transaction and is currently locked for updates. |
| 64 | */ |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 65 | private Map<String, Map<String, Update>> locks; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 66 | |
| 67 | @Initializer |
| 68 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 69 | public void init(StateContext<DatabaseState<String, byte[]>> context) { |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 70 | counters = context.get("counters"); |
| 71 | if (counters == null) { |
| 72 | counters = Maps.newConcurrentMap(); |
| 73 | context.put("counters", counters); |
| 74 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 75 | maps = context.get("maps"); |
| 76 | if (maps == null) { |
| 77 | maps = Maps.newConcurrentMap(); |
| 78 | context.put("maps", maps); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 79 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 80 | locks = context.get("locks"); |
| 81 | if (locks == null) { |
| 82 | locks = Maps.newConcurrentMap(); |
| 83 | context.put("locks", locks); |
| 84 | } |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 85 | queues = context.get("queues"); |
| 86 | if (queues == null) { |
| 87 | queues = Maps.newConcurrentMap(); |
| 88 | context.put("queues", queues); |
| 89 | } |
| 90 | queueUpdateNotificationTargets = context.get("queueUpdateNotificationTargets"); |
| 91 | if (queueUpdateNotificationTargets == null) { |
| 92 | queueUpdateNotificationTargets = Maps.newConcurrentMap(); |
| 93 | context.put("queueUpdateNotificationTargets", queueUpdateNotificationTargets); |
| 94 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 95 | nextVersion = context.get("nextVersion"); |
| 96 | if (nextVersion == null) { |
| 97 | nextVersion = new Long(0); |
| 98 | context.put("nextVersion", nextVersion); |
| 99 | } |
| 100 | } |
| 101 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 102 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 103 | public Set<String> maps() { |
| 104 | return ImmutableSet.copyOf(maps.keySet()); |
Madan Jampani | a89f8f9 | 2015-04-01 14:39:54 -0700 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | @Override |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 108 | public Map<String, Long> counters() { |
| 109 | Map<String, Long> counterMap = Maps.newHashMap(); |
| 110 | counters.forEach((k, v) -> counterMap.put(k, v.get())); |
| 111 | return counterMap; |
| 112 | } |
| 113 | |
| 114 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 115 | public int size(String mapName) { |
| 116 | return getMap(mapName).size(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 120 | public boolean mapIsEmpty(String mapName) { |
| 121 | return getMap(mapName).isEmpty(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 125 | public boolean mapContainsKey(String mapName, String key) { |
| 126 | return getMap(mapName).containsKey(key); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 130 | public boolean mapContainsValue(String mapName, byte[] value) { |
| 131 | return getMap(mapName).values().stream().anyMatch(v -> Arrays.equals(v.value(), value)); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 135 | public Versioned<byte[]> mapGet(String mapName, String key) { |
| 136 | return getMap(mapName).get(key); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 137 | } |
| 138 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 139 | |
| 140 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 141 | public Result<UpdateResult<String, byte[]>> mapUpdate( |
| 142 | String mapName, |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 143 | String key, |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 144 | Match<byte[]> valueMatch, |
| 145 | Match<Long> versionMatch, |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 146 | byte[] value) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 147 | if (isLockedForUpdates(mapName, key)) { |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 148 | return Result.locked(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 149 | } |
| 150 | Versioned<byte[]> currentValue = getMap(mapName).get(key); |
| 151 | if (!valueMatch.matches(currentValue == null ? null : currentValue.value()) || |
| 152 | !versionMatch.matches(currentValue == null ? null : currentValue.version())) { |
| 153 | return Result.ok(new UpdateResult<>(false, mapName, key, currentValue, currentValue)); |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 154 | } else { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 155 | if (value == null && currentValue != null) { |
| 156 | getMap(mapName).remove(key); |
| 157 | return Result.ok(new UpdateResult<>(true, mapName, key, currentValue, null)); |
| 158 | } |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 159 | Versioned<byte[]> newValue = new Versioned<>(value, ++nextVersion); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 160 | getMap(mapName).put(key, newValue); |
| 161 | return Result.ok(new UpdateResult<>(true, mapName, key, currentValue, newValue)); |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 162 | } |
| 163 | } |
| 164 | |
| 165 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 166 | public Result<Void> mapClear(String mapName) { |
| 167 | if (areTransactionsInProgress(mapName)) { |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 168 | return Result.locked(); |
| 169 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 170 | getMap(mapName).clear(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 171 | return Result.ok(null); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 175 | public Set<String> mapKeySet(String mapName) { |
| 176 | return ImmutableSet.copyOf(getMap(mapName).keySet()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 180 | public Collection<Versioned<byte[]>> mapValues(String mapName) { |
| 181 | return ImmutableList.copyOf(getMap(mapName).values()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 185 | public Set<Entry<String, Versioned<byte[]>>> mapEntrySet(String mapName) { |
| 186 | return ImmutableSet.copyOf(getMap(mapName) |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 187 | .entrySet() |
| 188 | .stream() |
| 189 | .map(entry -> Pair.of(entry.getKey(), entry.getValue())) |
| 190 | .collect(Collectors.toSet())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | @Override |
Madan Jampani | 55ac134 | 2015-05-04 19:05:04 -0700 | [diff] [blame] | 194 | public Long counterAddAndGet(String counterName, long delta) { |
| 195 | return getCounter(counterName).addAndGet(delta); |
Madan Jampani | 04aeb45 | 2015-05-02 16:12:24 -0700 | [diff] [blame] | 196 | } |
| 197 | |
| 198 | @Override |
| 199 | public Long counterGetAndAdd(String counterName, long delta) { |
| 200 | return getCounter(counterName).getAndAdd(delta); |
| 201 | } |
| 202 | |
| 203 | @Override |
| 204 | public Long counterGet(String counterName) { |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 205 | return getCounter(counterName).get(); |
| 206 | } |
| 207 | |
| 208 | @Override |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 209 | public Long queueSize(String queueName) { |
| 210 | return Long.valueOf(getQueue(queueName).size()); |
| 211 | } |
| 212 | |
| 213 | @Override |
| 214 | public byte[] queuePeek(String queueName) { |
| 215 | Queue<byte[]> queue = getQueue(queueName); |
| 216 | return queue.peek(); |
| 217 | } |
| 218 | |
| 219 | @Override |
| 220 | public byte[] queuePop(String queueName, NodeId requestor) { |
| 221 | Queue<byte[]> queue = getQueue(queueName); |
| 222 | if (queue.size() == 0 && requestor != null) { |
| 223 | getQueueUpdateNotificationTargets(queueName).add(requestor); |
| 224 | return null; |
| 225 | } else { |
| 226 | return queue.remove(); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | @Override |
| 231 | public Set<NodeId> queuePush(String queueName, byte[] entry) { |
| 232 | getQueue(queueName).add(entry); |
| 233 | Set<NodeId> notifyList = ImmutableSet.copyOf(getQueueUpdateNotificationTargets(queueName)); |
| 234 | getQueueUpdateNotificationTargets(queueName).clear(); |
| 235 | return notifyList; |
| 236 | } |
| 237 | |
| 238 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 239 | public boolean prepareAndCommit(Transaction transaction) { |
| 240 | if (prepare(transaction)) { |
| 241 | return commit(transaction); |
| 242 | } |
| 243 | return false; |
| 244 | } |
| 245 | |
| 246 | @Override |
| 247 | public boolean prepare(Transaction transaction) { |
| 248 | if (transaction.updates().stream().anyMatch(update -> |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 249 | isLockedByAnotherTransaction(update.mapName(), |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 250 | update.key(), |
| 251 | transaction.id()))) { |
| 252 | return false; |
| 253 | } |
| 254 | |
| 255 | if (transaction.updates().stream().allMatch(this::isUpdatePossible)) { |
| 256 | transaction.updates().forEach(update -> doProvisionalUpdate(update, transaction.id())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 257 | return true; |
| 258 | } |
| 259 | return false; |
| 260 | } |
| 261 | |
| 262 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 263 | public boolean commit(Transaction transaction) { |
| 264 | transaction.updates().forEach(update -> commitProvisionalUpdate(update, transaction.id())); |
| 265 | return true; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 266 | } |
| 267 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 268 | @Override |
| 269 | public boolean rollback(Transaction transaction) { |
| 270 | transaction.updates().forEach(update -> undoProvisionalUpdate(update, transaction.id())); |
| 271 | return true; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 272 | } |
| 273 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 274 | private Map<String, Versioned<byte[]>> getMap(String mapName) { |
| 275 | return maps.computeIfAbsent(mapName, name -> Maps.newConcurrentMap()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 276 | } |
| 277 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 278 | private Map<String, Update> getLockMap(String mapName) { |
| 279 | return locks.computeIfAbsent(mapName, name -> Maps.newConcurrentMap()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 282 | private AtomicLong getCounter(String counterName) { |
| 283 | return counters.computeIfAbsent(counterName, name -> new AtomicLong(0)); |
| 284 | } |
| 285 | |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 286 | private Queue<byte[]> getQueue(String queueName) { |
| 287 | return queues.computeIfAbsent(queueName, name -> new LinkedList<>()); |
| 288 | } |
| 289 | |
| 290 | private Set<NodeId> getQueueUpdateNotificationTargets(String queueName) { |
| 291 | return queueUpdateNotificationTargets.computeIfAbsent(queueName, name -> new HashSet<>()); |
| 292 | } |
| 293 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 294 | private boolean isUpdatePossible(DatabaseUpdate update) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 295 | Versioned<byte[]> existingEntry = mapGet(update.mapName(), update.key()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 296 | switch (update.type()) { |
| 297 | case PUT: |
| 298 | case REMOVE: |
| 299 | return true; |
| 300 | case PUT_IF_ABSENT: |
| 301 | return existingEntry == null; |
| 302 | case PUT_IF_VERSION_MATCH: |
| 303 | return existingEntry != null && existingEntry.version() == update.currentVersion(); |
| 304 | case PUT_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 305 | return existingEntry != null && Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 306 | case REMOVE_IF_VERSION_MATCH: |
| 307 | return existingEntry == null || existingEntry.version() == update.currentVersion(); |
| 308 | case REMOVE_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 309 | return existingEntry == null || Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 310 | default: |
| 311 | throw new IllegalStateException("Unsupported type: " + update.type()); |
| 312 | } |
| 313 | } |
| 314 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 315 | private void doProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 316 | Map<String, Update> lockMap = getLockMap(update.mapName()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 317 | switch (update.type()) { |
| 318 | case PUT: |
| 319 | case PUT_IF_ABSENT: |
| 320 | case PUT_IF_VERSION_MATCH: |
| 321 | case PUT_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 322 | lockMap.put(update.key(), new Update(transactionId, update.value())); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 323 | break; |
| 324 | case REMOVE: |
| 325 | case REMOVE_IF_VERSION_MATCH: |
| 326 | case REMOVE_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 327 | lockMap.put(update.key(), new Update(transactionId, null)); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 328 | break; |
| 329 | default: |
| 330 | throw new IllegalStateException("Unsupported type: " + update.type()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 331 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | private void commitProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 335 | String mapName = update.mapName(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 336 | String key = update.key(); |
| 337 | Type type = update.type(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 338 | Update provisionalUpdate = getLockMap(mapName).get(key); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 339 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 340 | getLockMap(mapName).remove(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 341 | } else { |
| 342 | return; |
| 343 | } |
| 344 | |
| 345 | switch (type) { |
| 346 | case PUT: |
| 347 | case PUT_IF_ABSENT: |
| 348 | case PUT_IF_VERSION_MATCH: |
| 349 | case PUT_IF_VALUE_MATCH: |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 350 | mapUpdate(mapName, key, Match.any(), Match.any(), provisionalUpdate.value()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 351 | break; |
| 352 | case REMOVE: |
| 353 | case REMOVE_IF_VERSION_MATCH: |
| 354 | case REMOVE_IF_VALUE_MATCH: |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 355 | mapUpdate(mapName, key, Match.any(), Match.any(), null); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 356 | break; |
| 357 | default: |
| 358 | break; |
| 359 | } |
| 360 | } |
| 361 | |
| 362 | private void undoProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 363 | String mapName = update.mapName(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 364 | String key = update.key(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 365 | Update provisionalUpdate = getLockMap(mapName).get(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 366 | if (provisionalUpdate == null) { |
| 367 | return; |
| 368 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 369 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 370 | getLockMap(mapName).remove(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 371 | } |
| 372 | } |
| 373 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 374 | private boolean isLockedByAnotherTransaction(String mapName, String key, long transactionId) { |
| 375 | Update update = getLockMap(mapName).get(key); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 376 | return update != null && !Objects.equal(transactionId, update.transactionId()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 377 | } |
| 378 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 379 | private boolean isLockedForUpdates(String mapName, String key) { |
| 380 | return getLockMap(mapName).containsKey(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 381 | } |
| 382 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame^] | 383 | private boolean areTransactionsInProgress(String mapName) { |
| 384 | return !getLockMap(mapName).isEmpty(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 385 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 386 | |
| 387 | private class Update { |
| 388 | private final long transactionId; |
| 389 | private final byte[] value; |
| 390 | |
| 391 | public Update(long txId, byte[] value) { |
| 392 | this.transactionId = txId; |
| 393 | this.value = value; |
| 394 | } |
| 395 | |
| 396 | public long transactionId() { |
| 397 | return this.transactionId; |
| 398 | } |
| 399 | |
| 400 | public byte[] value() { |
| 401 | return this.value; |
| 402 | } |
| 403 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 404 | } |