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 | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 30 | import org.onosproject.cluster.NodeId; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 31 | import org.onosproject.store.service.DatabaseUpdate; |
| 32 | import org.onosproject.store.service.Transaction; |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 33 | import org.onosproject.store.service.Versioned; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 34 | import org.onosproject.store.service.DatabaseUpdate.Type; |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 35 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 36 | import com.google.common.base.Objects; |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 37 | import com.google.common.collect.ImmutableList; |
| 38 | import com.google.common.collect.ImmutableSet; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 39 | import com.google.common.collect.Maps; |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 40 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 41 | import net.kuujo.copycat.state.Initializer; |
| 42 | import net.kuujo.copycat.state.StateContext; |
| 43 | |
| 44 | /** |
| 45 | * Default database state. |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 46 | */ |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 47 | public class DefaultDatabaseState implements DatabaseState<String, byte[]> { |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 48 | private Long nextVersion; |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 49 | private Map<String, AtomicLong> counters; |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 50 | private Map<String, Map<String, Versioned<byte[]>>> maps; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 51 | private Map<String, Queue<byte[]>> queues; |
| 52 | private Map<String, Set<NodeId>> queueUpdateNotificationTargets; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 53 | |
| 54 | /** |
| 55 | * This locks map has a structure similar to the "tables" map above and |
| 56 | * holds all the provisional updates made during a transaction's prepare phase. |
| 57 | * The entry value is represented as the tuple: (transactionId, newValue) |
| 58 | * If newValue == null that signifies this update is attempting to |
| 59 | * delete the existing value. |
| 60 | * This map also serves as a lock on the entries that are being updated. |
| 61 | * The presence of a entry in this map indicates that element is |
| 62 | * participating in a transaction and is currently locked for updates. |
| 63 | */ |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 64 | private Map<String, Map<String, Update>> locks; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 65 | |
| 66 | @Initializer |
| 67 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 68 | public void init(StateContext<DatabaseState<String, byte[]>> context) { |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 69 | counters = context.get("counters"); |
| 70 | if (counters == null) { |
| 71 | counters = Maps.newConcurrentMap(); |
| 72 | context.put("counters", counters); |
| 73 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 74 | maps = context.get("maps"); |
| 75 | if (maps == null) { |
| 76 | maps = Maps.newConcurrentMap(); |
| 77 | context.put("maps", maps); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 78 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 79 | locks = context.get("locks"); |
| 80 | if (locks == null) { |
| 81 | locks = Maps.newConcurrentMap(); |
| 82 | context.put("locks", locks); |
| 83 | } |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 84 | queues = context.get("queues"); |
| 85 | if (queues == null) { |
| 86 | queues = Maps.newConcurrentMap(); |
| 87 | context.put("queues", queues); |
| 88 | } |
| 89 | queueUpdateNotificationTargets = context.get("queueUpdateNotificationTargets"); |
| 90 | if (queueUpdateNotificationTargets == null) { |
| 91 | queueUpdateNotificationTargets = Maps.newConcurrentMap(); |
| 92 | context.put("queueUpdateNotificationTargets", queueUpdateNotificationTargets); |
| 93 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 94 | nextVersion = context.get("nextVersion"); |
| 95 | if (nextVersion == null) { |
| 96 | nextVersion = new Long(0); |
| 97 | context.put("nextVersion", nextVersion); |
| 98 | } |
| 99 | } |
| 100 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 101 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 102 | public Set<String> maps() { |
| 103 | return ImmutableSet.copyOf(maps.keySet()); |
Madan Jampani | a89f8f9 | 2015-04-01 14:39:54 -0700 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | @Override |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 107 | public Map<String, Long> counters() { |
| 108 | Map<String, Long> counterMap = Maps.newHashMap(); |
| 109 | counters.forEach((k, v) -> counterMap.put(k, v.get())); |
| 110 | return counterMap; |
| 111 | } |
| 112 | |
| 113 | @Override |
Madan Jampani | 3ca9cb6 | 2015-07-21 11:35:44 -0700 | [diff] [blame^] | 114 | public int mapSize(String mapName) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 115 | return getMap(mapName).size(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 119 | public boolean mapIsEmpty(String mapName) { |
| 120 | return getMap(mapName).isEmpty(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 124 | public boolean mapContainsKey(String mapName, String key) { |
| 125 | return getMap(mapName).containsKey(key); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 129 | public boolean mapContainsValue(String mapName, byte[] value) { |
| 130 | return getMap(mapName).values().stream().anyMatch(v -> Arrays.equals(v.value(), value)); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 134 | public Versioned<byte[]> mapGet(String mapName, String key) { |
| 135 | return getMap(mapName).get(key); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 136 | } |
| 137 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 138 | |
| 139 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 140 | public Result<UpdateResult<String, byte[]>> mapUpdate( |
| 141 | String mapName, |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 142 | String key, |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 143 | Match<byte[]> valueMatch, |
| 144 | Match<Long> versionMatch, |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 145 | byte[] value) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 146 | if (isLockedForUpdates(mapName, key)) { |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 147 | return Result.locked(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 148 | } |
| 149 | Versioned<byte[]> currentValue = getMap(mapName).get(key); |
| 150 | if (!valueMatch.matches(currentValue == null ? null : currentValue.value()) || |
| 151 | !versionMatch.matches(currentValue == null ? null : currentValue.version())) { |
| 152 | return Result.ok(new UpdateResult<>(false, mapName, key, currentValue, currentValue)); |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 153 | } else { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 154 | if (value == null && currentValue != null) { |
| 155 | getMap(mapName).remove(key); |
| 156 | return Result.ok(new UpdateResult<>(true, mapName, key, currentValue, null)); |
| 157 | } |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 158 | Versioned<byte[]> newValue = new Versioned<>(value, ++nextVersion); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 159 | getMap(mapName).put(key, newValue); |
| 160 | return Result.ok(new UpdateResult<>(true, mapName, key, currentValue, newValue)); |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 161 | } |
| 162 | } |
| 163 | |
| 164 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 165 | public Result<Void> mapClear(String mapName) { |
| 166 | if (areTransactionsInProgress(mapName)) { |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 167 | return Result.locked(); |
| 168 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 169 | getMap(mapName).clear(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 170 | return Result.ok(null); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 174 | public Set<String> mapKeySet(String mapName) { |
| 175 | return ImmutableSet.copyOf(getMap(mapName).keySet()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 179 | public Collection<Versioned<byte[]>> mapValues(String mapName) { |
| 180 | return ImmutableList.copyOf(getMap(mapName).values()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 184 | public Set<Entry<String, Versioned<byte[]>>> mapEntrySet(String mapName) { |
| 185 | return ImmutableSet.copyOf(getMap(mapName) |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 186 | .entrySet() |
| 187 | .stream() |
Madan Jampani | 3ca9cb6 | 2015-07-21 11:35:44 -0700 | [diff] [blame^] | 188 | .map(entry -> Maps.immutableEntry(entry.getKey(), entry.getValue())) |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 189 | .collect(Collectors.toSet())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | @Override |
Madan Jampani | 55ac134 | 2015-05-04 19:05:04 -0700 | [diff] [blame] | 193 | public Long counterAddAndGet(String counterName, long delta) { |
| 194 | return getCounter(counterName).addAndGet(delta); |
Madan Jampani | 04aeb45 | 2015-05-02 16:12:24 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | @Override |
| 198 | public Long counterGetAndAdd(String counterName, long delta) { |
| 199 | return getCounter(counterName).getAndAdd(delta); |
| 200 | } |
| 201 | |
| 202 | @Override |
| 203 | public Long counterGet(String counterName) { |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 204 | return getCounter(counterName).get(); |
| 205 | } |
| 206 | |
| 207 | @Override |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 208 | public Long queueSize(String queueName) { |
| 209 | return Long.valueOf(getQueue(queueName).size()); |
| 210 | } |
| 211 | |
| 212 | @Override |
| 213 | public byte[] queuePeek(String queueName) { |
| 214 | Queue<byte[]> queue = getQueue(queueName); |
| 215 | return queue.peek(); |
| 216 | } |
| 217 | |
| 218 | @Override |
| 219 | public byte[] queuePop(String queueName, NodeId requestor) { |
| 220 | Queue<byte[]> queue = getQueue(queueName); |
| 221 | if (queue.size() == 0 && requestor != null) { |
| 222 | getQueueUpdateNotificationTargets(queueName).add(requestor); |
| 223 | return null; |
| 224 | } else { |
| 225 | return queue.remove(); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | @Override |
| 230 | public Set<NodeId> queuePush(String queueName, byte[] entry) { |
| 231 | getQueue(queueName).add(entry); |
| 232 | Set<NodeId> notifyList = ImmutableSet.copyOf(getQueueUpdateNotificationTargets(queueName)); |
| 233 | getQueueUpdateNotificationTargets(queueName).clear(); |
| 234 | return notifyList; |
| 235 | } |
| 236 | |
| 237 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 238 | public boolean prepareAndCommit(Transaction transaction) { |
| 239 | if (prepare(transaction)) { |
| 240 | return commit(transaction); |
| 241 | } |
| 242 | return false; |
| 243 | } |
| 244 | |
| 245 | @Override |
| 246 | public boolean prepare(Transaction transaction) { |
| 247 | if (transaction.updates().stream().anyMatch(update -> |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 248 | isLockedByAnotherTransaction(update.mapName(), |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 249 | update.key(), |
| 250 | transaction.id()))) { |
| 251 | return false; |
| 252 | } |
| 253 | |
| 254 | if (transaction.updates().stream().allMatch(this::isUpdatePossible)) { |
| 255 | transaction.updates().forEach(update -> doProvisionalUpdate(update, transaction.id())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 256 | return true; |
| 257 | } |
| 258 | return false; |
| 259 | } |
| 260 | |
| 261 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 262 | public boolean commit(Transaction transaction) { |
| 263 | transaction.updates().forEach(update -> commitProvisionalUpdate(update, transaction.id())); |
| 264 | return true; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 265 | } |
| 266 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 267 | @Override |
| 268 | public boolean rollback(Transaction transaction) { |
| 269 | transaction.updates().forEach(update -> undoProvisionalUpdate(update, transaction.id())); |
| 270 | return true; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 271 | } |
| 272 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 273 | private Map<String, Versioned<byte[]>> getMap(String mapName) { |
| 274 | return maps.computeIfAbsent(mapName, name -> Maps.newConcurrentMap()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 275 | } |
| 276 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 277 | private Map<String, Update> getLockMap(String mapName) { |
| 278 | return locks.computeIfAbsent(mapName, name -> Maps.newConcurrentMap()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 279 | } |
| 280 | |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 281 | private AtomicLong getCounter(String counterName) { |
| 282 | return counters.computeIfAbsent(counterName, name -> new AtomicLong(0)); |
| 283 | } |
| 284 | |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 285 | private Queue<byte[]> getQueue(String queueName) { |
| 286 | return queues.computeIfAbsent(queueName, name -> new LinkedList<>()); |
| 287 | } |
| 288 | |
| 289 | private Set<NodeId> getQueueUpdateNotificationTargets(String queueName) { |
| 290 | return queueUpdateNotificationTargets.computeIfAbsent(queueName, name -> new HashSet<>()); |
| 291 | } |
| 292 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 293 | private boolean isUpdatePossible(DatabaseUpdate update) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 294 | Versioned<byte[]> existingEntry = mapGet(update.mapName(), update.key()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 295 | switch (update.type()) { |
| 296 | case PUT: |
| 297 | case REMOVE: |
| 298 | return true; |
| 299 | case PUT_IF_ABSENT: |
| 300 | return existingEntry == null; |
| 301 | case PUT_IF_VERSION_MATCH: |
| 302 | return existingEntry != null && existingEntry.version() == update.currentVersion(); |
| 303 | case PUT_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 304 | return existingEntry != null && Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 305 | case REMOVE_IF_VERSION_MATCH: |
| 306 | return existingEntry == null || existingEntry.version() == update.currentVersion(); |
| 307 | case REMOVE_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 308 | return existingEntry == null || Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 309 | default: |
| 310 | throw new IllegalStateException("Unsupported type: " + update.type()); |
| 311 | } |
| 312 | } |
| 313 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 314 | private void doProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 315 | Map<String, Update> lockMap = getLockMap(update.mapName()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 316 | switch (update.type()) { |
| 317 | case PUT: |
| 318 | case PUT_IF_ABSENT: |
| 319 | case PUT_IF_VERSION_MATCH: |
| 320 | case PUT_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 321 | lockMap.put(update.key(), new Update(transactionId, update.value())); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 322 | break; |
| 323 | case REMOVE: |
| 324 | case REMOVE_IF_VERSION_MATCH: |
| 325 | case REMOVE_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 326 | lockMap.put(update.key(), new Update(transactionId, null)); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 327 | break; |
| 328 | default: |
| 329 | throw new IllegalStateException("Unsupported type: " + update.type()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 330 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | private void commitProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 334 | String mapName = update.mapName(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 335 | String key = update.key(); |
| 336 | Type type = update.type(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 337 | Update provisionalUpdate = getLockMap(mapName).get(key); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 338 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 339 | getLockMap(mapName).remove(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 340 | } else { |
| 341 | return; |
| 342 | } |
| 343 | |
| 344 | switch (type) { |
| 345 | case PUT: |
| 346 | case PUT_IF_ABSENT: |
| 347 | case PUT_IF_VERSION_MATCH: |
| 348 | case PUT_IF_VALUE_MATCH: |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 349 | mapUpdate(mapName, key, Match.any(), Match.any(), provisionalUpdate.value()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 350 | break; |
| 351 | case REMOVE: |
| 352 | case REMOVE_IF_VERSION_MATCH: |
| 353 | case REMOVE_IF_VALUE_MATCH: |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 354 | mapUpdate(mapName, key, Match.any(), Match.any(), null); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 355 | break; |
| 356 | default: |
| 357 | break; |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | private void undoProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 362 | String mapName = update.mapName(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 363 | String key = update.key(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 364 | Update provisionalUpdate = getLockMap(mapName).get(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 365 | if (provisionalUpdate == null) { |
| 366 | return; |
| 367 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 368 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 369 | getLockMap(mapName).remove(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 370 | } |
| 371 | } |
| 372 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 373 | private boolean isLockedByAnotherTransaction(String mapName, String key, long transactionId) { |
| 374 | Update update = getLockMap(mapName).get(key); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 375 | return update != null && !Objects.equal(transactionId, update.transactionId()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 376 | } |
| 377 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 378 | private boolean isLockedForUpdates(String mapName, String key) { |
| 379 | return getLockMap(mapName).containsKey(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 380 | } |
| 381 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 382 | private boolean areTransactionsInProgress(String mapName) { |
| 383 | return !getLockMap(mapName).isEmpty(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 384 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 385 | |
| 386 | private class Update { |
| 387 | private final long transactionId; |
| 388 | private final byte[] value; |
| 389 | |
| 390 | public Update(long txId, byte[] value) { |
| 391 | this.transactionId = txId; |
| 392 | this.value = value; |
| 393 | } |
| 394 | |
| 395 | public long transactionId() { |
| 396 | return this.transactionId; |
| 397 | } |
| 398 | |
| 399 | public byte[] value() { |
| 400 | return this.value; |
| 401 | } |
| 402 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 403 | } |