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 | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 51 | private Map<String, Map<String, Versioned<byte[]>>> tables; |
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 | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 75 | tables = context.get("tables"); |
| 76 | if (tables == null) { |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 77 | tables = Maps.newConcurrentMap(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 78 | context.put("tables", tables); |
| 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 | a89f8f9 | 2015-04-01 14:39:54 -0700 | [diff] [blame] | 103 | public Set<String> tableNames() { |
| 104 | return new HashSet<>(tables.keySet()); |
| 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 | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 115 | public int size(String tableName) { |
| 116 | return getTableMap(tableName).size(); |
| 117 | } |
| 118 | |
| 119 | @Override |
| 120 | public boolean isEmpty(String tableName) { |
| 121 | return getTableMap(tableName).isEmpty(); |
| 122 | } |
| 123 | |
| 124 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 125 | public boolean containsKey(String tableName, String key) { |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 126 | return getTableMap(tableName).containsKey(key); |
| 127 | } |
| 128 | |
| 129 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 130 | public boolean containsValue(String tableName, byte[] value) { |
| 131 | return getTableMap(tableName).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 | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 135 | public Versioned<byte[]> get(String tableName, String key) { |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 136 | return getTableMap(tableName).get(key); |
| 137 | } |
| 138 | |
| 139 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 140 | public Result<Versioned<byte[]>> put(String tableName, String key, byte[] value) { |
| 141 | return isLockedForUpdates(tableName, key) |
| 142 | ? Result.locked() |
| 143 | : Result.ok(getTableMap(tableName).put(key, new Versioned<>(value, ++nextVersion))); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | @Override |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 147 | public Result<UpdateResult<Versioned<byte[]>>> putAndGet(String tableName, |
| 148 | String key, |
| 149 | byte[] value) { |
| 150 | if (isLockedForUpdates(tableName, key)) { |
| 151 | return Result.locked(); |
| 152 | } else { |
| 153 | Versioned<byte[]> newValue = new Versioned<>(value, ++nextVersion); |
| 154 | Versioned<byte[]> oldValue = getTableMap(tableName).put(key, newValue); |
| 155 | return Result.ok(new UpdateResult<>(true, oldValue, newValue)); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | @Override |
| 160 | public Result<UpdateResult<Versioned<byte[]>>> putIfAbsentAndGet(String tableName, |
| 161 | String key, |
| 162 | byte[] value) { |
| 163 | if (isLockedForUpdates(tableName, key)) { |
| 164 | return Result.locked(); |
| 165 | } |
| 166 | Versioned<byte[]> currentValue = getTableMap(tableName).get(key); |
| 167 | if (currentValue != null) { |
| 168 | return Result.ok(new UpdateResult<>(false, currentValue, currentValue)); |
| 169 | } else { |
| 170 | Versioned<byte[]> newValue = new Versioned<>(value, ++nextVersion); |
| 171 | getTableMap(tableName).put(key, newValue); |
| 172 | return Result.ok(new UpdateResult<>(true, null, newValue)); |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 177 | public Result<Versioned<byte[]>> remove(String tableName, String key) { |
| 178 | return isLockedForUpdates(tableName, key) |
| 179 | ? Result.locked() |
| 180 | : Result.ok(getTableMap(tableName).remove(key)); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 184 | public Result<Void> clear(String tableName) { |
| 185 | if (areTransactionsInProgress(tableName)) { |
| 186 | return Result.locked(); |
| 187 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 188 | getTableMap(tableName).clear(); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 189 | return Result.ok(null); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 193 | public Set<String> keySet(String tableName) { |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 194 | return ImmutableSet.copyOf(getTableMap(tableName).keySet()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 198 | public Collection<Versioned<byte[]>> values(String tableName) { |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 199 | return ImmutableList.copyOf(getTableMap(tableName).values()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 203 | public Set<Entry<String, Versioned<byte[]>>> entrySet(String tableName) { |
Madan Jampani | 393e0f0 | 2015-02-12 07:35:39 +0530 | [diff] [blame] | 204 | return ImmutableSet.copyOf(getTableMap(tableName) |
| 205 | .entrySet() |
| 206 | .stream() |
| 207 | .map(entry -> Pair.of(entry.getKey(), entry.getValue())) |
| 208 | .collect(Collectors.toSet())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 212 | public Result<Versioned<byte[]>> putIfAbsent(String tableName, String key, byte[] value) { |
| 213 | if (isLockedForUpdates(tableName, key)) { |
| 214 | return Result.locked(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 215 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 216 | Versioned<byte[]> existingValue = get(tableName, key); |
| 217 | Versioned<byte[]> currentValue = existingValue != null ? existingValue : put(tableName, key, value).value(); |
| 218 | return Result.ok(currentValue); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 222 | public Result<Boolean> remove(String tableName, String key, byte[] value) { |
| 223 | if (isLockedForUpdates(tableName, key)) { |
| 224 | return Result.locked(); |
| 225 | } |
| 226 | Versioned<byte[]> existing = get(tableName, key); |
| 227 | if (existing != null && Arrays.equals(existing.value(), value)) { |
| 228 | getTableMap(tableName).remove(key); |
| 229 | return Result.ok(true); |
| 230 | } |
| 231 | return Result.ok(false); |
| 232 | } |
| 233 | |
| 234 | @Override |
| 235 | public Result<Boolean> remove(String tableName, String key, long version) { |
| 236 | if (isLockedForUpdates(tableName, key)) { |
| 237 | return Result.locked(); |
| 238 | } |
| 239 | Versioned<byte[]> existing = get(tableName, key); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 240 | if (existing != null && existing.version() == version) { |
| 241 | remove(tableName, key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 242 | return Result.ok(true); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 243 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 244 | return Result.ok(false); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 248 | public Result<Boolean> replace(String tableName, String key, byte[] oldValue, byte[] newValue) { |
| 249 | if (isLockedForUpdates(tableName, key)) { |
| 250 | return Result.locked(); |
| 251 | } |
| 252 | Versioned<byte[]> existing = get(tableName, key); |
| 253 | if (existing != null && Arrays.equals(existing.value(), oldValue)) { |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 254 | put(tableName, key, newValue); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 255 | return Result.ok(true); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 256 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 257 | return Result.ok(false); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 261 | public Result<Boolean> replace(String tableName, String key, long oldVersion, byte[] newValue) { |
| 262 | if (isLockedForUpdates(tableName, key)) { |
| 263 | return Result.locked(); |
| 264 | } |
| 265 | Versioned<byte[]> existing = get(tableName, key); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 266 | if (existing != null && existing.version() == oldVersion) { |
| 267 | put(tableName, key, newValue); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 268 | return Result.ok(true); |
| 269 | } |
| 270 | return Result.ok(false); |
| 271 | } |
| 272 | |
| 273 | @Override |
Madan Jampani | 346d4f5 | 2015-05-04 11:09:39 -0700 | [diff] [blame] | 274 | public Result<UpdateResult<Versioned<byte[]>>> replaceAndGet( |
| 275 | String tableName, String key, long oldVersion, byte[] newValue) { |
| 276 | if (isLockedForUpdates(tableName, key)) { |
| 277 | return Result.locked(); |
| 278 | } |
| 279 | boolean updated = false; |
| 280 | Versioned<byte[]> previous = get(tableName, key); |
| 281 | Versioned<byte[]> current = previous; |
| 282 | if (previous != null && previous.version() == oldVersion) { |
| 283 | current = new Versioned<>(newValue, ++nextVersion); |
| 284 | getTableMap(tableName).put(key, current); |
| 285 | updated = true; |
| 286 | } |
| 287 | return Result.ok(new UpdateResult<>(updated, previous, current)); |
| 288 | } |
| 289 | |
| 290 | @Override |
Madan Jampani | 55ac134 | 2015-05-04 19:05:04 -0700 | [diff] [blame] | 291 | public Long counterAddAndGet(String counterName, long delta) { |
| 292 | return getCounter(counterName).addAndGet(delta); |
Madan Jampani | 04aeb45 | 2015-05-02 16:12:24 -0700 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | @Override |
| 296 | public Long counterGetAndAdd(String counterName, long delta) { |
| 297 | return getCounter(counterName).getAndAdd(delta); |
| 298 | } |
| 299 | |
| 300 | @Override |
| 301 | public Long counterGet(String counterName) { |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 302 | return getCounter(counterName).get(); |
| 303 | } |
| 304 | |
| 305 | @Override |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 306 | public Long queueSize(String queueName) { |
| 307 | return Long.valueOf(getQueue(queueName).size()); |
| 308 | } |
| 309 | |
| 310 | @Override |
| 311 | public byte[] queuePeek(String queueName) { |
| 312 | Queue<byte[]> queue = getQueue(queueName); |
| 313 | return queue.peek(); |
| 314 | } |
| 315 | |
| 316 | @Override |
| 317 | public byte[] queuePop(String queueName, NodeId requestor) { |
| 318 | Queue<byte[]> queue = getQueue(queueName); |
| 319 | if (queue.size() == 0 && requestor != null) { |
| 320 | getQueueUpdateNotificationTargets(queueName).add(requestor); |
| 321 | return null; |
| 322 | } else { |
| 323 | return queue.remove(); |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | @Override |
| 328 | public Set<NodeId> queuePush(String queueName, byte[] entry) { |
| 329 | getQueue(queueName).add(entry); |
| 330 | Set<NodeId> notifyList = ImmutableSet.copyOf(getQueueUpdateNotificationTargets(queueName)); |
| 331 | getQueueUpdateNotificationTargets(queueName).clear(); |
| 332 | return notifyList; |
| 333 | } |
| 334 | |
| 335 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 336 | public boolean prepareAndCommit(Transaction transaction) { |
| 337 | if (prepare(transaction)) { |
| 338 | return commit(transaction); |
| 339 | } |
| 340 | return false; |
| 341 | } |
| 342 | |
| 343 | @Override |
| 344 | public boolean prepare(Transaction transaction) { |
| 345 | if (transaction.updates().stream().anyMatch(update -> |
| 346 | isLockedByAnotherTransaction(update.tableName(), |
| 347 | update.key(), |
| 348 | transaction.id()))) { |
| 349 | return false; |
| 350 | } |
| 351 | |
| 352 | if (transaction.updates().stream().allMatch(this::isUpdatePossible)) { |
| 353 | transaction.updates().forEach(update -> doProvisionalUpdate(update, transaction.id())); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 354 | return true; |
| 355 | } |
| 356 | return false; |
| 357 | } |
| 358 | |
| 359 | @Override |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 360 | public boolean commit(Transaction transaction) { |
| 361 | transaction.updates().forEach(update -> commitProvisionalUpdate(update, transaction.id())); |
| 362 | return true; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 363 | } |
| 364 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 365 | @Override |
| 366 | public boolean rollback(Transaction transaction) { |
| 367 | transaction.updates().forEach(update -> undoProvisionalUpdate(update, transaction.id())); |
| 368 | return true; |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 369 | } |
| 370 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 371 | private Map<String, Versioned<byte[]>> getTableMap(String tableName) { |
| 372 | return tables.computeIfAbsent(tableName, name -> Maps.newConcurrentMap()); |
| 373 | } |
| 374 | |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 375 | private Map<String, Update> getLockMap(String tableName) { |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 376 | return locks.computeIfAbsent(tableName, name -> Maps.newConcurrentMap()); |
| 377 | } |
| 378 | |
Madan Jampani | b5d72d5 | 2015-04-03 16:53:50 -0700 | [diff] [blame] | 379 | private AtomicLong getCounter(String counterName) { |
| 380 | return counters.computeIfAbsent(counterName, name -> new AtomicLong(0)); |
| 381 | } |
| 382 | |
Madan Jampani | 63c659f | 2015-06-11 00:52:58 -0700 | [diff] [blame] | 383 | private Queue<byte[]> getQueue(String queueName) { |
| 384 | return queues.computeIfAbsent(queueName, name -> new LinkedList<>()); |
| 385 | } |
| 386 | |
| 387 | private Set<NodeId> getQueueUpdateNotificationTargets(String queueName) { |
| 388 | return queueUpdateNotificationTargets.computeIfAbsent(queueName, name -> new HashSet<>()); |
| 389 | } |
| 390 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 391 | private boolean isUpdatePossible(DatabaseUpdate update) { |
| 392 | Versioned<byte[]> existingEntry = get(update.tableName(), update.key()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 393 | switch (update.type()) { |
| 394 | case PUT: |
| 395 | case REMOVE: |
| 396 | return true; |
| 397 | case PUT_IF_ABSENT: |
| 398 | return existingEntry == null; |
| 399 | case PUT_IF_VERSION_MATCH: |
| 400 | return existingEntry != null && existingEntry.version() == update.currentVersion(); |
| 401 | case PUT_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 402 | return existingEntry != null && Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 403 | case REMOVE_IF_VERSION_MATCH: |
| 404 | return existingEntry == null || existingEntry.version() == update.currentVersion(); |
| 405 | case REMOVE_IF_VALUE_MATCH: |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 406 | return existingEntry == null || Arrays.equals(existingEntry.value(), update.currentValue()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 407 | default: |
| 408 | throw new IllegalStateException("Unsupported type: " + update.type()); |
| 409 | } |
| 410 | } |
| 411 | |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 412 | private void doProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 413 | Map<String, Update> lockMap = getLockMap(update.tableName()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 414 | switch (update.type()) { |
| 415 | case PUT: |
| 416 | case PUT_IF_ABSENT: |
| 417 | case PUT_IF_VERSION_MATCH: |
| 418 | case PUT_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 419 | lockMap.put(update.key(), new Update(transactionId, update.value())); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 420 | break; |
| 421 | case REMOVE: |
| 422 | case REMOVE_IF_VERSION_MATCH: |
| 423 | case REMOVE_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 424 | lockMap.put(update.key(), new Update(transactionId, null)); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 425 | break; |
| 426 | default: |
| 427 | throw new IllegalStateException("Unsupported type: " + update.type()); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 428 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | private void commitProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
| 432 | String tableName = update.tableName(); |
| 433 | String key = update.key(); |
| 434 | Type type = update.type(); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 435 | Update provisionalUpdate = getLockMap(tableName).get(key); |
| 436 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 437 | getLockMap(tableName).remove(key); |
| 438 | } else { |
| 439 | return; |
| 440 | } |
| 441 | |
| 442 | switch (type) { |
| 443 | case PUT: |
| 444 | case PUT_IF_ABSENT: |
| 445 | case PUT_IF_VERSION_MATCH: |
| 446 | case PUT_IF_VALUE_MATCH: |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 447 | put(tableName, key, provisionalUpdate.value()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 448 | break; |
| 449 | case REMOVE: |
| 450 | case REMOVE_IF_VERSION_MATCH: |
| 451 | case REMOVE_IF_VALUE_MATCH: |
| 452 | remove(tableName, key); |
| 453 | break; |
| 454 | default: |
| 455 | break; |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | private void undoProvisionalUpdate(DatabaseUpdate update, long transactionId) { |
| 460 | String tableName = update.tableName(); |
| 461 | String key = update.key(); |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 462 | Update provisionalUpdate = getLockMap(tableName).get(key); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 463 | if (provisionalUpdate == null) { |
| 464 | return; |
| 465 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 466 | if (Objects.equal(transactionId, provisionalUpdate.transactionId())) { |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 467 | getLockMap(tableName).remove(key); |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | private boolean isLockedByAnotherTransaction(String tableName, String key, long transactionId) { |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 472 | Update update = getLockMap(tableName).get(key); |
| 473 | return update != null && !Objects.equal(transactionId, update.transactionId()); |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | private boolean isLockedForUpdates(String tableName, String key) { |
| 477 | return getLockMap(tableName).containsKey(key); |
| 478 | } |
| 479 | |
| 480 | private boolean areTransactionsInProgress(String tableName) { |
| 481 | return !getLockMap(tableName).isEmpty(); |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 482 | } |
Ayaka Koshibe | 2c6b7ef | 2015-04-28 17:18:05 -0700 | [diff] [blame] | 483 | |
| 484 | private class Update { |
| 485 | private final long transactionId; |
| 486 | private final byte[] value; |
| 487 | |
| 488 | public Update(long txId, byte[] value) { |
| 489 | this.transactionId = txId; |
| 490 | this.value = value; |
| 491 | } |
| 492 | |
| 493 | public long transactionId() { |
| 494 | return this.transactionId; |
| 495 | } |
| 496 | |
| 497 | public byte[] value() { |
| 498 | return this.value; |
| 499 | } |
| 500 | } |
Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame] | 501 | } |