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 | f4c8850 | 2016-01-21 12:35:36 -0800 | [diff] [blame] | 17 | package org.onosproject.store.primitives.impl; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 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; |
Madan Jampani | f2f086c | 2016-01-13 16:15:39 -0800 | [diff] [blame] | 24 | |
Aaron Kruglikov | 82fd632 | 2015-10-06 12:02:46 -0700 | [diff] [blame] | 25 | import net.kuujo.copycat.state.Initializer; |
| 26 | import net.kuujo.copycat.state.StateContext; |
Madan Jampani | f2f086c | 2016-01-13 16:15:39 -0800 | [diff] [blame] | 27 | |
| 28 | import org.onlab.util.Match; |
Aaron Kruglikov | 82fd632 | 2015-10-06 12:02:46 -0700 | [diff] [blame] | 29 | import org.onosproject.store.service.DatabaseUpdate; |
| 30 | import org.onosproject.store.service.Transaction; |
| 31 | import org.onosproject.store.service.Versioned; |
| 32 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 33 | import java.util.Arrays; |
| 34 | import java.util.Collection; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 35 | import java.util.LinkedList; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 36 | import java.util.Map; |
| 37 | import java.util.Map.Entry; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 38 | import java.util.Queue; |
Aaron Kruglikov | 82fd632 | 2015-10-06 12:02:46 -0700 | [diff] [blame] | 39 | import java.util.Set; |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 40 | import java.util.concurrent.atomic.AtomicLong; |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 41 | import java.util.stream.Collectors; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 42 | |
| 43 | /** |
| 44 | * Default database state. |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 45 | */ |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 46 | public class DefaultDatabaseState implements DatabaseState<String, byte[]> { |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 47 | private Long nextVersion; |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 48 | private Map<String, AtomicLong> counters; |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 49 | private Map<String, Map<String, Versioned<byte[]>>> maps; |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 50 | private Map<String, Queue<byte[]>> queues; |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 51 | |
| 52 | /** |
| 53 | * This locks map has a structure similar to the "tables" map above and |
| 54 | * holds all the provisional updates made during a transaction's prepare phase. |
| 55 | * The entry value is represented as the tuple: (transactionId, newValue) |
| 56 | * If newValue == null that signifies this update is attempting to |
| 57 | * delete the existing value. |
| 58 | * This map also serves as a lock on the entries that are being updated. |
| 59 | * The presence of a entry in this map indicates that element is |
| 60 | * participating in a transaction and is currently locked for updates. |
| 61 | */ |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 62 | private Map<String, Map<String, Update>> locks; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 63 | |
| 64 | @Initializer |
| 65 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 66 | public void init(StateContext<DatabaseState<String, byte[]>> context) { |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 67 | counters = context.get("counters"); |
| 68 | if (counters == null) { |
| 69 | counters = Maps.newConcurrentMap(); |
| 70 | context.put("counters", counters); |
| 71 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 72 | maps = context.get("maps"); |
| 73 | if (maps == null) { |
| 74 | maps = Maps.newConcurrentMap(); |
| 75 | context.put("maps", maps); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 76 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 77 | locks = context.get("locks"); |
| 78 | if (locks == null) { |
| 79 | locks = Maps.newConcurrentMap(); |
| 80 | context.put("locks", locks); |
| 81 | } |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 82 | queues = context.get("queues"); |
| 83 | if (queues == null) { |
| 84 | queues = Maps.newConcurrentMap(); |
| 85 | context.put("queues", queues); |
| 86 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 87 | nextVersion = context.get("nextVersion"); |
| 88 | if (nextVersion == null) { |
Sho SHIMIZU | c355c93 | 2015-09-10 10:51:03 -0700 | [diff] [blame] | 89 | nextVersion = 0L; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 90 | context.put("nextVersion", nextVersion); |
| 91 | } |
| 92 | } |
| 93 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 94 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 95 | public Set<String> maps() { |
| 96 | return ImmutableSet.copyOf(maps.keySet()); |
Madan Jampani | a89f8f9 | 2015-04-01 14:39:54 -0700 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | @Override |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 100 | public Map<String, Long> counters() { |
| 101 | Map<String, Long> counterMap = Maps.newHashMap(); |
| 102 | counters.forEach((k, v) -> counterMap.put(k, v.get())); |
| 103 | return counterMap; |
| 104 | } |
| 105 | |
| 106 | @Override |
Madan Jampani | 3ca9cb6 | 2015-07-21 11:35:44 -0700 | [diff] [blame] | 107 | public int mapSize(String mapName) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 108 | return getMap(mapName).size(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 112 | public boolean mapIsEmpty(String mapName) { |
| 113 | return getMap(mapName).isEmpty(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 117 | public boolean mapContainsKey(String mapName, String key) { |
| 118 | return getMap(mapName).containsKey(key); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 122 | public boolean mapContainsValue(String mapName, byte[] value) { |
| 123 | return getMap(mapName).values().stream().anyMatch(v -> Arrays.equals(v.value(), value)); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 127 | public Versioned<byte[]> mapGet(String mapName, String key) { |
| 128 | return getMap(mapName).get(key); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 129 | } |
| 130 | |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 131 | |
| 132 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 133 | public Result<UpdateResult<String, byte[]>> mapUpdate( |
| 134 | String mapName, |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 135 | String key, |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 136 | Match<byte[]> valueMatch, |
| 137 | Match<Long> versionMatch, |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 138 | byte[] value) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 139 | if (isLockedForUpdates(mapName, key)) { |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 140 | return Result.locked(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 141 | } |
| 142 | Versioned<byte[]> currentValue = getMap(mapName).get(key); |
| 143 | if (!valueMatch.matches(currentValue == null ? null : currentValue.value()) || |
| 144 | !versionMatch.matches(currentValue == null ? null : currentValue.version())) { |
| 145 | return Result.ok(new UpdateResult<>(false, mapName, key, currentValue, currentValue)); |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 146 | } else { |
Madan Jampani | 7c4e09a | 2015-07-22 11:44:29 -0700 | [diff] [blame] | 147 | if (value == null) { |
| 148 | if (currentValue == null) { |
| 149 | return Result.ok(new UpdateResult<>(false, mapName, key, null, null)); |
| 150 | } else { |
| 151 | getMap(mapName).remove(key); |
| 152 | return Result.ok(new UpdateResult<>(true, mapName, key, currentValue, null)); |
| 153 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 154 | } |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 155 | Versioned<byte[]> newValue = new Versioned<>(value, ++nextVersion); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 156 | getMap(mapName).put(key, newValue); |
| 157 | return Result.ok(new UpdateResult<>(true, mapName, key, currentValue, newValue)); |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 158 | } |
| 159 | } |
| 160 | |
| 161 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 162 | public Result<Void> mapClear(String mapName) { |
| 163 | if (areTransactionsInProgress(mapName)) { |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 164 | return Result.locked(); |
| 165 | } |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 166 | getMap(mapName).clear(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 167 | return Result.ok(null); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 171 | public Set<String> mapKeySet(String mapName) { |
| 172 | return ImmutableSet.copyOf(getMap(mapName).keySet()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 176 | public Collection<Versioned<byte[]>> mapValues(String mapName) { |
| 177 | return ImmutableList.copyOf(getMap(mapName).values()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 181 | public Set<Entry<String, Versioned<byte[]>>> mapEntrySet(String mapName) { |
| 182 | return ImmutableSet.copyOf(getMap(mapName) |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 183 | .entrySet() |
| 184 | .stream() |
Madan Jampani | 3ca9cb6 | 2015-07-21 11:35:44 -0700 | [diff] [blame] | 185 | .map(entry -> Maps.immutableEntry(entry.getKey(), entry.getValue())) |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 186 | .collect(Collectors.toSet())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | @Override |
Madan Jampani | 55ac134 | 2015-05-04 19:05:04 -0700 | [diff] [blame] | 190 | public Long counterAddAndGet(String counterName, long delta) { |
| 191 | return getCounter(counterName).addAndGet(delta); |
Madan Jampani | 04aeb45 | 2015-05-02 16:12:24 -0700 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | @Override |
| 195 | public Long counterGetAndAdd(String counterName, long delta) { |
| 196 | return getCounter(counterName).getAndAdd(delta); |
| 197 | } |
| 198 | |
| 199 | @Override |
Aaron Kruglikov | 82fd632 | 2015-10-06 12:02:46 -0700 | [diff] [blame] | 200 | public Boolean counterCompareAndSet(String counterName, long expectedValue, long updateValue) { |
| 201 | return getCounter(counterName).compareAndSet(expectedValue, updateValue); |
| 202 | } |
| 203 | |
| 204 | @Override |
Madan Jampani | 04aeb45 | 2015-05-02 16:12:24 -0700 | [diff] [blame] | 205 | public Long counterGet(String counterName) { |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 206 | return getCounter(counterName).get(); |
| 207 | } |
| 208 | |
| 209 | @Override |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 210 | public Long queueSize(String queueName) { |
| 211 | return Long.valueOf(getQueue(queueName).size()); |
| 212 | } |
| 213 | |
| 214 | @Override |
| 215 | public byte[] queuePeek(String queueName) { |
Madan Jampani | a6d787b | 2015-08-11 11:02:02 -0700 | [diff] [blame] | 216 | return getQueue(queueName).peek(); |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | @Override |
Madan Jampani | a6d787b | 2015-08-11 11:02:02 -0700 | [diff] [blame] | 220 | public byte[] queuePop(String queueName) { |
| 221 | return getQueue(queueName).poll(); |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | @Override |
Madan Jampani | a6d787b | 2015-08-11 11:02:02 -0700 | [diff] [blame] | 225 | public void queuePush(String queueName, byte[] entry) { |
| 226 | getQueue(queueName).offer(entry); |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | @Override |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 230 | public CommitResponse prepareAndCommit(Transaction transaction) { |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 231 | if (prepare(transaction)) { |
| 232 | return commit(transaction); |
| 233 | } |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 234 | return CommitResponse.failure(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | @Override |
| 238 | public boolean prepare(Transaction transaction) { |
| 239 | if (transaction.updates().stream().anyMatch(update -> |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 240 | isLockedByAnotherTransaction(update.mapName(), |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 241 | update.key(), |
| 242 | transaction.id()))) { |
| 243 | return false; |
| 244 | } |
| 245 | |
| 246 | if (transaction.updates().stream().allMatch(this::isUpdatePossible)) { |
| 247 | transaction.updates().forEach(update -> doProvisionalUpdate(update, transaction.id())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 248 | return true; |
| 249 | } |
| 250 | return false; |
| 251 | } |
| 252 | |
| 253 | @Override |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 254 | public CommitResponse commit(Transaction transaction) { |
| 255 | return CommitResponse.success(Lists.transform(transaction.updates(), |
| 256 | update -> commitProvisionalUpdate(update, transaction.id()))); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 257 | } |
| 258 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 259 | @Override |
| 260 | public boolean rollback(Transaction transaction) { |
| 261 | transaction.updates().forEach(update -> undoProvisionalUpdate(update, transaction.id())); |
| 262 | return true; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 263 | } |
| 264 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 265 | private Map<String, Versioned<byte[]>> getMap(String mapName) { |
| 266 | return maps.computeIfAbsent(mapName, name -> Maps.newConcurrentMap()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 267 | } |
| 268 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 269 | private Map<String, Update> getLockMap(String mapName) { |
| 270 | return locks.computeIfAbsent(mapName, name -> Maps.newConcurrentMap()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 271 | } |
| 272 | |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 273 | private AtomicLong getCounter(String counterName) { |
| 274 | return counters.computeIfAbsent(counterName, name -> new AtomicLong(0)); |
| 275 | } |
| 276 | |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 277 | private Queue<byte[]> getQueue(String queueName) { |
| 278 | return queues.computeIfAbsent(queueName, name -> new LinkedList<>()); |
| 279 | } |
| 280 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 281 | private boolean isUpdatePossible(DatabaseUpdate update) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 282 | Versioned<byte[]> existingEntry = mapGet(update.mapName(), update.key()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 283 | switch (update.type()) { |
| 284 | case PUT: |
| 285 | case REMOVE: |
| 286 | return true; |
| 287 | case PUT_IF_ABSENT: |
| 288 | return existingEntry == null; |
| 289 | case PUT_IF_VERSION_MATCH: |
| 290 | return existingEntry != null && existingEntry.version() == update.currentVersion(); |
| 291 | case PUT_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 292 | return existingEntry != null && Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 293 | case REMOVE_IF_VERSION_MATCH: |
| 294 | return existingEntry == null || existingEntry.version() == update.currentVersion(); |
| 295 | case REMOVE_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 296 | return existingEntry == null || Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 297 | default: |
| 298 | throw new IllegalStateException("Unsupported type: " + update.type()); |
| 299 | } |
| 300 | } |
| 301 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 302 | private void doProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 303 | Map<String, Update> lockMap = getLockMap(update.mapName()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 304 | switch (update.type()) { |
| 305 | case PUT: |
| 306 | case PUT_IF_ABSENT: |
| 307 | case PUT_IF_VERSION_MATCH: |
| 308 | case PUT_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 309 | lockMap.put(update.key(), new Update(transactionId, update.value())); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 310 | break; |
| 311 | case REMOVE: |
| 312 | case REMOVE_IF_VERSION_MATCH: |
| 313 | case REMOVE_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 314 | lockMap.put(update.key(), new Update(transactionId, null)); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 315 | break; |
| 316 | default: |
| 317 | throw new IllegalStateException("Unsupported type: " + update.type()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 318 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 319 | } |
| 320 | |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 321 | private UpdateResult<String, byte[]> commitProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 322 | String mapName = update.mapName(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 323 | String key = update.key(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 324 | Update provisionalUpdate = getLockMap(mapName).get(key); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 325 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 326 | getLockMap(mapName).remove(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 327 | } else { |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 328 | throw new IllegalStateException("Invalid transaction Id"); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 329 | } |
Madan Jampani | bab51a4 | 2015-08-10 13:53:35 -0700 | [diff] [blame] | 330 | return mapUpdate(mapName, key, Match.any(), Match.any(), provisionalUpdate.value()).value(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | private void undoProvisionalUpdate(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(); |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 336 | Update provisionalUpdate = getLockMap(mapName).get(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 337 | if (provisionalUpdate == null) { |
| 338 | return; |
| 339 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 340 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 341 | getLockMap(mapName).remove(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 342 | } |
| 343 | } |
| 344 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 345 | private boolean isLockedByAnotherTransaction(String mapName, String key, long transactionId) { |
| 346 | Update update = getLockMap(mapName).get(key); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 347 | return update != null && !Objects.equal(transactionId, update.transactionId()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 348 | } |
| 349 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 350 | private boolean isLockedForUpdates(String mapName, String key) { |
| 351 | return getLockMap(mapName).containsKey(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 352 | } |
| 353 | |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 354 | private boolean areTransactionsInProgress(String mapName) { |
| 355 | return !getLockMap(mapName).isEmpty(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 356 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 357 | |
| 358 | private class Update { |
| 359 | private final long transactionId; |
| 360 | private final byte[] value; |
| 361 | |
| 362 | public Update(long txId, byte[] value) { |
| 363 | this.transactionId = txId; |
| 364 | this.value = value; |
| 365 | } |
| 366 | |
| 367 | public long transactionId() { |
| 368 | return this.transactionId; |
| 369 | } |
| 370 | |
| 371 | public byte[] value() { |
| 372 | return this.value; |
| 373 | } |
| 374 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 375 | } |