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 | |
Aaron Kruglikov | 82fd632 | 2015-10-06 12:02:46 -0700 | [diff] [blame] | 19 | import com.google.common.base.Objects; |
| 20 | import com.google.common.collect.ImmutableList; |
| 21 | import com.google.common.collect.ImmutableSet; |
| 22 | import com.google.common.collect.Lists; |
| 23 | import com.google.common.collect.Maps; |
| 24 | import net.kuujo.copycat.state.Initializer; |
| 25 | import net.kuujo.copycat.state.StateContext; |
| 26 | import org.onosproject.store.service.DatabaseUpdate; |
| 27 | import org.onosproject.store.service.Transaction; |
| 28 | import org.onosproject.store.service.Versioned; |
| 29 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 30 | import java.util.Arrays; |
| 31 | import java.util.Collection; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 32 | import java.util.LinkedList; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 33 | import java.util.Map; |
| 34 | import java.util.Map.Entry; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 35 | import java.util.Queue; |
Aaron Kruglikov | 82fd632 | 2015-10-06 12:02:46 -0700 | [diff] [blame] | 36 | import java.util.Set; |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 37 | import java.util.concurrent.atomic.AtomicLong; |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 38 | import java.util.stream.Collectors; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 39 | |
| 40 | /** |
| 41 | * Default database state. |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 42 | */ |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 43 | public class DefaultDatabaseState implements DatabaseState<String, byte[]> { |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 44 | private Long nextVersion; |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 45 | private Map<String, AtomicLong> counters; |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 46 | private Map<String, Map<String, Versioned<byte[]>>> maps; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 47 | private Map<String, Queue<byte[]>> queues; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 48 | |
| 49 | /** |
| 50 | * This locks map has a structure similar to the "tables" map above and |
| 51 | * holds all the provisional updates made during a transaction's prepare phase. |
| 52 | * The entry value is represented as the tuple: (transactionId, newValue) |
| 53 | * If newValue == null that signifies this update is attempting to |
| 54 | * delete the existing value. |
| 55 | * This map also serves as a lock on the entries that are being updated. |
| 56 | * The presence of a entry in this map indicates that element is |
| 57 | * participating in a transaction and is currently locked for updates. |
| 58 | */ |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 59 | private Map<String, Map<String, Update>> locks; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 60 | |
| 61 | @Initializer |
| 62 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 63 | public void init(StateContext<DatabaseState<String, byte[]>> context) { |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 64 | counters = context.get("counters"); |
| 65 | if (counters == null) { |
| 66 | counters = Maps.newConcurrentMap(); |
| 67 | context.put("counters", counters); |
| 68 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 69 | maps = context.get("maps"); |
| 70 | if (maps == null) { |
| 71 | maps = Maps.newConcurrentMap(); |
| 72 | context.put("maps", maps); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 73 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 74 | locks = context.get("locks"); |
| 75 | if (locks == null) { |
| 76 | locks = Maps.newConcurrentMap(); |
| 77 | context.put("locks", locks); |
| 78 | } |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 79 | queues = context.get("queues"); |
| 80 | if (queues == null) { |
| 81 | queues = Maps.newConcurrentMap(); |
| 82 | context.put("queues", queues); |
| 83 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 84 | nextVersion = context.get("nextVersion"); |
| 85 | if (nextVersion == null) { |
Sho SHIMIZU | c355c93 | 2015-09-10 10:51:03 -0700 | [diff] [blame] | 86 | nextVersion = 0L; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 87 | context.put("nextVersion", nextVersion); |
| 88 | } |
| 89 | } |
| 90 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 91 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 92 | public Set<String> maps() { |
| 93 | return ImmutableSet.copyOf(maps.keySet()); |
Madan Jampani | a89f8f9 | 2015-04-01 14:39:54 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | @Override |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 97 | public Map<String, Long> counters() { |
| 98 | Map<String, Long> counterMap = Maps.newHashMap(); |
| 99 | counters.forEach((k, v) -> counterMap.put(k, v.get())); |
| 100 | return counterMap; |
| 101 | } |
| 102 | |
| 103 | @Override |
Madan Jampani | 3ca9cb6 | 2015-07-21 11:35:44 -0700 | [diff] [blame] | 104 | public int mapSize(String mapName) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 105 | return getMap(mapName).size(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 109 | public boolean mapIsEmpty(String mapName) { |
| 110 | return getMap(mapName).isEmpty(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 114 | public boolean mapContainsKey(String mapName, String key) { |
| 115 | return getMap(mapName).containsKey(key); |
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 mapContainsValue(String mapName, byte[] value) { |
| 120 | return getMap(mapName).values().stream().anyMatch(v -> Arrays.equals(v.value(), value)); |
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 Versioned<byte[]> mapGet(String mapName, String key) { |
| 125 | return getMap(mapName).get(key); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 126 | } |
| 127 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 128 | |
| 129 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 130 | public Result<UpdateResult<String, byte[]>> mapUpdate( |
| 131 | String mapName, |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 132 | String key, |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 133 | Match<byte[]> valueMatch, |
| 134 | Match<Long> versionMatch, |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 135 | byte[] value) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 136 | if (isLockedForUpdates(mapName, key)) { |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 137 | return Result.locked(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 138 | } |
| 139 | Versioned<byte[]> currentValue = getMap(mapName).get(key); |
| 140 | if (!valueMatch.matches(currentValue == null ? null : currentValue.value()) || |
| 141 | !versionMatch.matches(currentValue == null ? null : currentValue.version())) { |
| 142 | return Result.ok(new UpdateResult<>(false, mapName, key, currentValue, currentValue)); |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 143 | } else { |
Madan Jampani | 7c4e09a | 2015-07-22 11:44:29 -0700 | [diff] [blame] | 144 | if (value == null) { |
| 145 | if (currentValue == null) { |
| 146 | return Result.ok(new UpdateResult<>(false, mapName, key, null, null)); |
| 147 | } else { |
| 148 | getMap(mapName).remove(key); |
| 149 | return Result.ok(new UpdateResult<>(true, mapName, key, currentValue, null)); |
| 150 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 151 | } |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 152 | Versioned<byte[]> newValue = new Versioned<>(value, ++nextVersion); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 153 | getMap(mapName).put(key, newValue); |
| 154 | return Result.ok(new UpdateResult<>(true, mapName, key, currentValue, newValue)); |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 155 | } |
| 156 | } |
| 157 | |
| 158 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 159 | public Result<Void> mapClear(String mapName) { |
| 160 | if (areTransactionsInProgress(mapName)) { |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 161 | return Result.locked(); |
| 162 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 163 | getMap(mapName).clear(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 164 | return Result.ok(null); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 168 | public Set<String> mapKeySet(String mapName) { |
| 169 | return ImmutableSet.copyOf(getMap(mapName).keySet()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 173 | public Collection<Versioned<byte[]>> mapValues(String mapName) { |
| 174 | return ImmutableList.copyOf(getMap(mapName).values()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 178 | public Set<Entry<String, Versioned<byte[]>>> mapEntrySet(String mapName) { |
| 179 | return ImmutableSet.copyOf(getMap(mapName) |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 180 | .entrySet() |
| 181 | .stream() |
Madan Jampani | 3ca9cb6 | 2015-07-21 11:35:44 -0700 | [diff] [blame] | 182 | .map(entry -> Maps.immutableEntry(entry.getKey(), entry.getValue())) |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 183 | .collect(Collectors.toSet())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | @Override |
Madan Jampani | 55ac134 | 2015-05-04 19:05:04 -0700 | [diff] [blame] | 187 | public Long counterAddAndGet(String counterName, long delta) { |
| 188 | return getCounter(counterName).addAndGet(delta); |
Madan Jampani | 04aeb45 | 2015-05-02 16:12:24 -0700 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | @Override |
| 192 | public Long counterGetAndAdd(String counterName, long delta) { |
| 193 | return getCounter(counterName).getAndAdd(delta); |
| 194 | } |
| 195 | |
| 196 | @Override |
Aaron Kruglikov | 82fd632 | 2015-10-06 12:02:46 -0700 | [diff] [blame] | 197 | public Boolean counterCompareAndSet(String counterName, long expectedValue, long updateValue) { |
| 198 | return getCounter(counterName).compareAndSet(expectedValue, updateValue); |
| 199 | } |
| 200 | |
| 201 | @Override |
Madan Jampani | 04aeb45 | 2015-05-02 16:12:24 -0700 | [diff] [blame] | 202 | public Long counterGet(String counterName) { |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 203 | return getCounter(counterName).get(); |
| 204 | } |
| 205 | |
| 206 | @Override |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 207 | public Long queueSize(String queueName) { |
| 208 | return Long.valueOf(getQueue(queueName).size()); |
| 209 | } |
| 210 | |
| 211 | @Override |
| 212 | public byte[] queuePeek(String queueName) { |
Madan Jampani | a6d787b | 2015-08-11 11:02:02 -0700 | [diff] [blame] | 213 | return getQueue(queueName).peek(); |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | @Override |
Madan Jampani | a6d787b | 2015-08-11 11:02:02 -0700 | [diff] [blame] | 217 | public byte[] queuePop(String queueName) { |
| 218 | return getQueue(queueName).poll(); |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | @Override |
Madan Jampani | a6d787b | 2015-08-11 11:02:02 -0700 | [diff] [blame] | 222 | public void queuePush(String queueName, byte[] entry) { |
| 223 | getQueue(queueName).offer(entry); |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | @Override |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 227 | public CommitResponse prepareAndCommit(Transaction transaction) { |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 228 | if (prepare(transaction)) { |
| 229 | return commit(transaction); |
| 230 | } |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 231 | return CommitResponse.failure(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | @Override |
| 235 | public boolean prepare(Transaction transaction) { |
| 236 | if (transaction.updates().stream().anyMatch(update -> |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 237 | isLockedByAnotherTransaction(update.mapName(), |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 238 | update.key(), |
| 239 | transaction.id()))) { |
| 240 | return false; |
| 241 | } |
| 242 | |
| 243 | if (transaction.updates().stream().allMatch(this::isUpdatePossible)) { |
| 244 | transaction.updates().forEach(update -> doProvisionalUpdate(update, transaction.id())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 245 | return true; |
| 246 | } |
| 247 | return false; |
| 248 | } |
| 249 | |
| 250 | @Override |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 251 | public CommitResponse commit(Transaction transaction) { |
| 252 | return CommitResponse.success(Lists.transform(transaction.updates(), |
| 253 | update -> commitProvisionalUpdate(update, transaction.id()))); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 254 | } |
| 255 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 256 | @Override |
| 257 | public boolean rollback(Transaction transaction) { |
| 258 | transaction.updates().forEach(update -> undoProvisionalUpdate(update, transaction.id())); |
| 259 | return true; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 260 | } |
| 261 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 262 | private Map<String, Versioned<byte[]>> getMap(String mapName) { |
| 263 | return maps.computeIfAbsent(mapName, name -> Maps.newConcurrentMap()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 264 | } |
| 265 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 266 | private Map<String, Update> getLockMap(String mapName) { |
| 267 | return locks.computeIfAbsent(mapName, name -> Maps.newConcurrentMap()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 268 | } |
| 269 | |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 270 | private AtomicLong getCounter(String counterName) { |
| 271 | return counters.computeIfAbsent(counterName, name -> new AtomicLong(0)); |
| 272 | } |
| 273 | |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 274 | private Queue<byte[]> getQueue(String queueName) { |
| 275 | return queues.computeIfAbsent(queueName, name -> new LinkedList<>()); |
| 276 | } |
| 277 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 278 | private boolean isUpdatePossible(DatabaseUpdate update) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 279 | Versioned<byte[]> existingEntry = mapGet(update.mapName(), update.key()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 280 | switch (update.type()) { |
| 281 | case PUT: |
| 282 | case REMOVE: |
| 283 | return true; |
| 284 | case PUT_IF_ABSENT: |
| 285 | return existingEntry == null; |
| 286 | case PUT_IF_VERSION_MATCH: |
| 287 | return existingEntry != null && existingEntry.version() == update.currentVersion(); |
| 288 | case PUT_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 289 | return existingEntry != null && Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 290 | case REMOVE_IF_VERSION_MATCH: |
| 291 | return existingEntry == null || existingEntry.version() == update.currentVersion(); |
| 292 | case REMOVE_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 293 | return existingEntry == null || Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 294 | default: |
| 295 | throw new IllegalStateException("Unsupported type: " + update.type()); |
| 296 | } |
| 297 | } |
| 298 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 299 | private void doProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 300 | Map<String, Update> lockMap = getLockMap(update.mapName()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 301 | switch (update.type()) { |
| 302 | case PUT: |
| 303 | case PUT_IF_ABSENT: |
| 304 | case PUT_IF_VERSION_MATCH: |
| 305 | case PUT_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 306 | lockMap.put(update.key(), new Update(transactionId, update.value())); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 307 | break; |
| 308 | case REMOVE: |
| 309 | case REMOVE_IF_VERSION_MATCH: |
| 310 | case REMOVE_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 311 | lockMap.put(update.key(), new Update(transactionId, null)); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 312 | break; |
| 313 | default: |
| 314 | throw new IllegalStateException("Unsupported type: " + update.type()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 315 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 316 | } |
| 317 | |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 318 | private UpdateResult<String, byte[]> commitProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 319 | String mapName = update.mapName(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 320 | String key = update.key(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 321 | Update provisionalUpdate = getLockMap(mapName).get(key); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 322 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 323 | getLockMap(mapName).remove(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 324 | } else { |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 325 | throw new IllegalStateException("Invalid transaction Id"); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 326 | } |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 327 | return mapUpdate(mapName, key, Match.any(), Match.any(), provisionalUpdate.value()).value(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | private void undoProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 331 | String mapName = update.mapName(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 332 | String key = update.key(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 333 | Update provisionalUpdate = getLockMap(mapName).get(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 334 | if (provisionalUpdate == null) { |
| 335 | return; |
| 336 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 337 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 338 | getLockMap(mapName).remove(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 339 | } |
| 340 | } |
| 341 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 342 | private boolean isLockedByAnotherTransaction(String mapName, String key, long transactionId) { |
| 343 | Update update = getLockMap(mapName).get(key); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 344 | return update != null && !Objects.equal(transactionId, update.transactionId()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 345 | } |
| 346 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 347 | private boolean isLockedForUpdates(String mapName, String key) { |
| 348 | return getLockMap(mapName).containsKey(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 349 | } |
| 350 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 351 | private boolean areTransactionsInProgress(String mapName) { |
| 352 | return !getLockMap(mapName).isEmpty(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 353 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 354 | |
| 355 | private class Update { |
| 356 | private final long transactionId; |
| 357 | private final byte[] value; |
| 358 | |
| 359 | public Update(long txId, byte[] value) { |
| 360 | this.transactionId = txId; |
| 361 | this.value = value; |
| 362 | } |
| 363 | |
| 364 | public long transactionId() { |
| 365 | return this.transactionId; |
| 366 | } |
| 367 | |
| 368 | public byte[] value() { |
| 369 | return this.value; |
| 370 | } |
| 371 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 372 | } |