Jonathan Hart | 6df9017 | 2014-04-03 10:13:11 -0700 | [diff] [blame] | 1 | package net.onrc.onos.core.datastore.hazelcast; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 2 | |
| 3 | import java.io.IOException; |
| 4 | import java.util.ArrayList; |
| 5 | import java.util.Arrays; |
| 6 | import java.util.List; |
| 7 | import java.util.Set; |
| 8 | import java.util.concurrent.atomic.AtomicLong; |
| 9 | |
Jonathan Hart | 6df9017 | 2014-04-03 10:13:11 -0700 | [diff] [blame] | 10 | import net.onrc.onos.core.datastore.IKVTable; |
| 11 | import net.onrc.onos.core.datastore.IKVTableID; |
| 12 | import net.onrc.onos.core.datastore.ObjectDoesntExistException; |
| 13 | import net.onrc.onos.core.datastore.ObjectExistsException; |
| 14 | import net.onrc.onos.core.datastore.WrongVersionException; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 15 | |
| 16 | import org.slf4j.Logger; |
| 17 | import org.slf4j.LoggerFactory; |
| 18 | |
| 19 | import com.hazelcast.core.IMap; |
| 20 | import com.hazelcast.nio.ObjectDataInput; |
| 21 | import com.hazelcast.nio.ObjectDataOutput; |
| 22 | import com.hazelcast.nio.serialization.IdentifiedDataSerializable; |
| 23 | |
| 24 | public class HZTable implements IKVTable, IKVTableID { |
| 25 | @SuppressWarnings("unused") |
| 26 | private static final Logger log = LoggerFactory.getLogger(HZTable.class); |
| 27 | |
| 28 | // not sure how strict this should be managed |
| 29 | private static final AtomicLong initialVersion = new AtomicLong(HZClient.VERSION_NONEXISTENT); |
| 30 | |
| 31 | /** |
| 32 | * generate a new initial version for an entry. |
| 33 | * @return initial value |
| 34 | */ |
| 35 | protected static long getInitialVersion() { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 36 | long version = initialVersion.incrementAndGet(); |
| 37 | if (version == HZClient.VERSION_NONEXISTENT) { |
| 38 | // used up whole 64bit space? |
| 39 | version = initialVersion.incrementAndGet(); |
| 40 | } |
| 41 | return version; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 42 | } |
| 43 | |
| 44 | /** |
| 45 | * increment version, avoiding VERSION_NONEXISTENT. |
| 46 | * @param version |
| 47 | * @return |
| 48 | */ |
| 49 | protected static long getNextVersion(final long version) { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 50 | long nextVersion = version + 1; |
| 51 | if (nextVersion == HZClient.VERSION_NONEXISTENT) { |
| 52 | ++nextVersion; |
| 53 | } |
| 54 | return nextVersion; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | static class VersionedValue implements IdentifiedDataSerializable { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 58 | private static final long serialVersionUID = -3149375966890712708L; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 59 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 60 | private byte[] value; |
| 61 | private long version; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 62 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 63 | protected VersionedValue() { |
| 64 | value = new byte[0]; |
| 65 | version = HZClient.VERSION_NONEXISTENT; |
| 66 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 67 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 68 | public VersionedValue(final byte[] value, final long version) { |
| 69 | this.value = value; |
| 70 | this.version = version; |
| 71 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 72 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 73 | public byte[] getValue() { |
| 74 | return value; |
| 75 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 76 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 77 | public long getVersion() { |
| 78 | return version; |
| 79 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 80 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 81 | public void setValue(final byte[] value) { |
| 82 | this.value = value; |
| 83 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 84 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 85 | public void setNextVersion() { |
| 86 | this.version = getNextVersion(this.version); |
| 87 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 88 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 89 | @Override |
| 90 | public void writeData(final ObjectDataOutput out) throws IOException { |
| 91 | out.writeLong(version); |
| 92 | out.writeInt(value.length); |
| 93 | if (value.length > 0) { |
| 94 | out.write(value); |
| 95 | } |
| 96 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 97 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 98 | @Override |
| 99 | public void readData(final ObjectDataInput in) throws IOException { |
| 100 | version = in.readLong(); |
| 101 | final int valueLen = in.readInt(); |
| 102 | value = new byte[valueLen]; |
| 103 | in.readFully(value); |
| 104 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 105 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 106 | @Override |
| 107 | public int getFactoryId() { |
| 108 | return VersionedValueSerializableFactory.FACTORY_ID; |
| 109 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 110 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 111 | @Override |
| 112 | public int getId() { |
| 113 | return VersionedValueSerializableFactory.VERSIONED_VALUE_ID; |
| 114 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 115 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 116 | @Override |
| 117 | public int hashCode() { |
| 118 | final int prime = 31; |
| 119 | int result = 1; |
| 120 | result = prime * result + (int) (version ^ (version >>> 32)); |
| 121 | result = prime * result + Arrays.hashCode(value); |
| 122 | return result; |
| 123 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 124 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 125 | @Override |
| 126 | public boolean equals(final Object obj) { |
| 127 | if (this == obj) { |
| 128 | return true; |
| 129 | } |
| 130 | if (obj == null) { |
| 131 | return false; |
| 132 | } |
| 133 | if (getClass() != obj.getClass()) { |
| 134 | return false; |
| 135 | } |
| 136 | VersionedValue other = (VersionedValue) obj; |
| 137 | if (version != other.version) { |
| 138 | return false; |
| 139 | } |
| 140 | if (!Arrays.equals(value, other.value)) { |
| 141 | return false; |
| 142 | } |
| 143 | return true; |
| 144 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | // TODO Refactor and extract common parts |
| 148 | public static class Entry implements IKVEntry { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 149 | final byte[] key; |
| 150 | byte[] value; |
| 151 | long version; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 152 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 153 | public Entry(final byte[] key, final byte[] value, final long version) { |
| 154 | this.key = key; |
| 155 | this.setValue(value); |
| 156 | this.setVersion(version); |
| 157 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 158 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 159 | public Entry(final byte[] key) { |
| 160 | this(key, null, HZClient.VERSION_NONEXISTENT); |
| 161 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 162 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 163 | @Override |
| 164 | public byte[] getKey() { |
| 165 | return key; |
| 166 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 167 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 168 | @Override |
| 169 | public byte[] getValue() { |
| 170 | return value; |
| 171 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 172 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 173 | @Override |
| 174 | public long getVersion() { |
| 175 | return version; |
| 176 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 177 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 178 | void setValue(final byte[] value) { |
| 179 | this.value = value; |
| 180 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 181 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 182 | void setVersion(final long version) { |
| 183 | this.version = version; |
| 184 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | |
| 188 | |
| 189 | private final String mapName; |
| 190 | private final IMap<byte[], VersionedValue> map; |
| 191 | |
| 192 | public HZTable(final String mapName, final IMap<byte[], VersionedValue> map) { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 193 | this.mapName = mapName; |
| 194 | this.map = map; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | @Override |
| 198 | public String getTableName() { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 199 | return mapName; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | @Override |
| 203 | public IKVTableID getTableId() { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 204 | return this; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | @Override |
| 208 | public long create(final byte[] key, final byte[] value) throws ObjectExistsException { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 209 | final long version = getInitialVersion(); |
| 210 | VersionedValue existing = map.putIfAbsent(key, new VersionedValue(value, version)); |
| 211 | if (existing != null) { |
| 212 | throw new ObjectExistsException(this, key); |
| 213 | } |
| 214 | return version; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | @Override |
| 218 | public long forceCreate(final byte[] key, final byte[] value) { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 219 | final long version = getInitialVersion(); |
| 220 | map.set(key, new VersionedValue(value, version)); |
| 221 | return version; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | @Override |
| 225 | public IKVEntry read(final byte[] key) throws ObjectDoesntExistException { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 226 | final VersionedValue value = map.get(key); |
| 227 | if (value == null) { |
| 228 | throw new ObjectDoesntExistException(this, key); |
| 229 | } |
| 230 | return new Entry(key, value.getValue(), value.getVersion()); |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | @Override |
| 234 | public long update(final byte[] key, final byte[] value, final long version) |
| 235 | throws ObjectDoesntExistException, WrongVersionException { |
| 236 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 237 | try { |
| 238 | map.lock(key); |
| 239 | final VersionedValue oldValue = map.get(key); |
| 240 | if (oldValue == null) { |
| 241 | throw new ObjectDoesntExistException(this, key); |
| 242 | } |
| 243 | if (oldValue.getVersion() != version) { |
| 244 | throw new WrongVersionException(this, key, version, oldValue.getVersion()); |
| 245 | } |
| 246 | final long nextVersion = getNextVersion(version); |
| 247 | map.set(key, new VersionedValue(value, nextVersion)); |
| 248 | return nextVersion; |
| 249 | } finally { |
| 250 | map.unlock(key); |
| 251 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | @Override |
| 255 | public long update(final byte[] key, final byte[] value) |
| 256 | throws ObjectDoesntExistException { |
| 257 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 258 | try { |
| 259 | map.lock(key); |
| 260 | final VersionedValue valueInMap = map.get(key); |
| 261 | if (valueInMap == null) { |
| 262 | throw new ObjectDoesntExistException(this, key); |
| 263 | } |
| 264 | valueInMap.setValue(value); |
| 265 | valueInMap.setNextVersion(); |
| 266 | map.set(key, valueInMap); |
| 267 | return valueInMap.getVersion(); |
| 268 | } finally { |
| 269 | map.unlock(key); |
| 270 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | @Override |
| 274 | public long delete(final byte[] key, final long version) |
| 275 | throws ObjectDoesntExistException, WrongVersionException { |
| 276 | |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 277 | try { |
| 278 | map.lock(key); |
| 279 | final VersionedValue oldValue = map.get(key); |
| 280 | if (oldValue == null) { |
| 281 | throw new ObjectDoesntExistException(this, key); |
| 282 | } |
| 283 | if (oldValue.getVersion() != version) { |
| 284 | throw new WrongVersionException(this, key, version, oldValue.getVersion()); |
| 285 | } |
| 286 | map.delete(key); |
| 287 | return oldValue.getVersion(); |
| 288 | } finally { |
| 289 | map.unlock(key); |
| 290 | } |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | @Override |
| 294 | public long forceDelete(final byte[] key) { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 295 | final VersionedValue valueInMap = map.remove(key); |
| 296 | if (valueInMap == null) { |
| 297 | return HZClient.VERSION_NONEXISTENT; |
| 298 | } |
| 299 | return valueInMap.getVersion(); |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 300 | } |
| 301 | |
| 302 | @Override |
| 303 | public Iterable<IKVEntry> getAllEntries() { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 304 | final Set<IMap.Entry<byte[], VersionedValue>> entries = map.entrySet(); |
| 305 | List<IKVEntry> entryList = new ArrayList<IKVTable.IKVEntry>(entries.size()); |
| 306 | for (IMap.Entry<byte[], VersionedValue> entry : entries) { |
| 307 | entryList.add(new Entry(entry.getKey(), entry.getValue().getValue(), entry.getValue().getVersion())); |
| 308 | } |
| 309 | return entryList; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | @Override |
| 313 | public String toString() { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 314 | return "[HZTable " + mapName + "]"; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | IMap<byte[], VersionedValue> getBackendMap() { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 318 | return this.map; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | @Override |
| 322 | public long VERSION_NONEXISTENT() { |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 323 | return HZClient.VERSION_NONEXISTENT; |
Yuta HIGUCHI | 6a64313 | 2014-03-18 22:39:27 -0700 | [diff] [blame] | 324 | } |
| 325 | } |