Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 1 | package org.onlab.onos.store.service.impl; |
| 2 | |
| 3 | import static com.google.common.base.Preconditions.checkArgument; |
| 4 | import static com.google.common.base.Preconditions.checkState; |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 5 | import static com.google.common.base.Verify.verifyNotNull; |
Madan Jampani | 348a9fe | 2014-11-09 01:37:51 -0800 | [diff] [blame] | 6 | import static org.slf4j.LoggerFactory.getLogger; |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 7 | |
| 8 | import java.io.File; |
| 9 | import java.io.IOException; |
| 10 | import java.util.ArrayList; |
| 11 | import java.util.Arrays; |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 12 | import java.util.Iterator; |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 13 | import java.util.List; |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 14 | import java.util.Map; |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 15 | import java.util.concurrent.ConcurrentNavigableMap; |
| 16 | |
| 17 | import net.kuujo.copycat.log.Entry; |
| 18 | import net.kuujo.copycat.log.Log; |
| 19 | import net.kuujo.copycat.log.LogIndexOutOfBoundsException; |
| 20 | |
| 21 | import org.mapdb.Atomic; |
| 22 | import org.mapdb.BTreeMap; |
| 23 | import org.mapdb.DB; |
| 24 | import org.mapdb.DBMaker; |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 25 | import org.mapdb.Serializer; |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 26 | import org.mapdb.TxBlock; |
| 27 | import org.mapdb.TxMaker; |
| 28 | import org.onlab.onos.store.serializers.StoreSerializer; |
Madan Jampani | 348a9fe | 2014-11-09 01:37:51 -0800 | [diff] [blame] | 29 | import org.slf4j.Logger; |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 30 | |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 31 | /** |
| 32 | * MapDB based log implementation. |
| 33 | */ |
| 34 | public class MapDBLog implements Log { |
| 35 | |
Madan Jampani | 348a9fe | 2014-11-09 01:37:51 -0800 | [diff] [blame] | 36 | private final Logger log = getLogger(getClass()); |
| 37 | |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 38 | private final File dbFile; |
| 39 | private TxMaker txMaker; |
| 40 | private final StoreSerializer serializer; |
| 41 | private static final String LOG_NAME = "log"; |
| 42 | private static final String SIZE_FIELD_NAME = "size"; |
| 43 | |
Yuta HIGUCHI | 413573d | 2014-11-10 09:45:18 -0800 | [diff] [blame^] | 44 | private int cacheSize = 256; |
| 45 | |
Madan Jampani | 2ee2000 | 2014-11-06 20:06:12 -0800 | [diff] [blame] | 46 | public MapDBLog(String dbFileName, StoreSerializer serializer) { |
| 47 | this.dbFile = new File(dbFileName); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 48 | this.serializer = serializer; |
| 49 | } |
| 50 | |
| 51 | @Override |
| 52 | public void open() throws IOException { |
| 53 | txMaker = DBMaker |
| 54 | .newFileDB(dbFile) |
Yuta HIGUCHI | 413573d | 2014-11-10 09:45:18 -0800 | [diff] [blame^] | 55 | .cacheLRUEnable() |
| 56 | .cacheSize(cacheSize) |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 57 | .makeTxMaker(); |
| 58 | } |
| 59 | |
| 60 | @Override |
| 61 | public void close() throws IOException { |
| 62 | assertIsOpen(); |
| 63 | txMaker.close(); |
| 64 | txMaker = null; |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public boolean isOpen() { |
| 69 | return txMaker != null; |
| 70 | } |
| 71 | |
| 72 | protected void assertIsOpen() { |
| 73 | checkState(isOpen(), "The log is not currently open."); |
| 74 | } |
| 75 | |
| 76 | @Override |
| 77 | public long appendEntry(Entry entry) { |
| 78 | checkArgument(entry != null, "expecting non-null entry"); |
| 79 | return appendEntries(entry).get(0); |
| 80 | } |
| 81 | |
| 82 | @Override |
| 83 | public List<Long> appendEntries(Entry... entries) { |
| 84 | checkArgument(entries != null, "expecting non-null entries"); |
| 85 | return appendEntries(Arrays.asList(entries)); |
| 86 | } |
| 87 | |
| 88 | @Override |
| 89 | public List<Long> appendEntries(List<Entry> entries) { |
| 90 | assertIsOpen(); |
| 91 | checkArgument(entries != null, "expecting non-null entries"); |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 92 | final List<Long> indices = new ArrayList<>(entries.size()); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 93 | |
| 94 | txMaker.execute(new TxBlock() { |
| 95 | @Override |
| 96 | public void tx(DB db) { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 97 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 98 | Atomic.Long size = db.getAtomicLong(SIZE_FIELD_NAME); |
| 99 | long nextIndex = log.isEmpty() ? 1 : log.lastKey() + 1; |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 100 | long addedBytes = 0; |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 101 | for (Entry entry : entries) { |
| 102 | byte[] entryBytes = serializer.encode(entry); |
| 103 | log.put(nextIndex, entryBytes); |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 104 | addedBytes += entryBytes.length; |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 105 | indices.add(nextIndex); |
| 106 | nextIndex++; |
| 107 | } |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 108 | size.addAndGet(addedBytes); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 109 | } |
| 110 | }); |
| 111 | |
| 112 | return indices; |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public boolean containsEntry(long index) { |
| 117 | assertIsOpen(); |
| 118 | DB db = txMaker.makeTx(); |
| 119 | try { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 120 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 121 | return log.containsKey(index); |
| 122 | } finally { |
| 123 | db.close(); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | @Override |
| 128 | public void delete() throws IOException { |
| 129 | assertIsOpen(); |
| 130 | txMaker.execute(new TxBlock() { |
| 131 | @Override |
| 132 | public void tx(DB db) { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 133 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 134 | Atomic.Long size = db.getAtomicLong(SIZE_FIELD_NAME); |
| 135 | log.clear(); |
| 136 | size.set(0); |
| 137 | } |
| 138 | }); |
| 139 | } |
| 140 | |
| 141 | @Override |
| 142 | public <T extends Entry> T firstEntry() { |
| 143 | assertIsOpen(); |
| 144 | DB db = txMaker.makeTx(); |
| 145 | try { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 146 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 147 | return log.isEmpty() ? null : serializer.decode(log.firstEntry().getValue()); |
| 148 | } finally { |
| 149 | db.close(); |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | @Override |
| 154 | public long firstIndex() { |
| 155 | assertIsOpen(); |
| 156 | DB db = txMaker.makeTx(); |
| 157 | try { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 158 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 159 | return log.isEmpty() ? 0 : log.firstKey(); |
| 160 | } finally { |
| 161 | db.close(); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | @Override |
| 166 | public <T extends Entry> List<T> getEntries(long from, long to) { |
| 167 | assertIsOpen(); |
| 168 | DB db = txMaker.makeTx(); |
| 169 | try { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 170 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 171 | if (log.isEmpty()) { |
| 172 | throw new LogIndexOutOfBoundsException("Log is empty"); |
| 173 | } else if (from < log.firstKey()) { |
| 174 | throw new LogIndexOutOfBoundsException("From index out of bounds."); |
| 175 | } else if (to > log.lastKey()) { |
| 176 | throw new LogIndexOutOfBoundsException("To index out of bounds."); |
| 177 | } |
| 178 | List<T> entries = new ArrayList<>((int) (to - from + 1)); |
| 179 | for (long i = from; i <= to; i++) { |
| 180 | T entry = serializer.decode(log.get(i)); |
| 181 | entries.add(entry); |
| 182 | } |
| 183 | return entries; |
| 184 | } finally { |
| 185 | db.close(); |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | @Override |
| 190 | public <T extends Entry> T getEntry(long index) { |
| 191 | assertIsOpen(); |
| 192 | DB db = txMaker.makeTx(); |
| 193 | try { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 194 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 195 | byte[] entryBytes = log.get(index); |
| 196 | return entryBytes == null ? null : serializer.decode(entryBytes); |
| 197 | } finally { |
| 198 | db.close(); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | @Override |
| 203 | public boolean isEmpty() { |
| 204 | assertIsOpen(); |
| 205 | DB db = txMaker.makeTx(); |
| 206 | try { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 207 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 208 | return log.isEmpty(); |
| 209 | } finally { |
| 210 | db.close(); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | @Override |
| 215 | public <T extends Entry> T lastEntry() { |
| 216 | assertIsOpen(); |
| 217 | DB db = txMaker.makeTx(); |
| 218 | try { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 219 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 220 | return log.isEmpty() ? null : serializer.decode(log.lastEntry().getValue()); |
| 221 | } finally { |
| 222 | db.close(); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | @Override |
| 227 | public long lastIndex() { |
| 228 | assertIsOpen(); |
| 229 | DB db = txMaker.makeTx(); |
| 230 | try { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 231 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 232 | return log.isEmpty() ? 0 : log.lastKey(); |
| 233 | } finally { |
| 234 | db.close(); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | @Override |
| 239 | public void removeAfter(long index) { |
| 240 | assertIsOpen(); |
| 241 | txMaker.execute(new TxBlock() { |
| 242 | @Override |
| 243 | public void tx(DB db) { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 244 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 245 | Atomic.Long size = db.getAtomicLong(SIZE_FIELD_NAME); |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 246 | long removedBytes = 0; |
| 247 | ConcurrentNavigableMap<Long, byte[]> tailMap = log.tailMap(index, false); |
| 248 | Iterator<Map.Entry<Long, byte[]>> it = tailMap.entrySet().iterator(); |
| 249 | while (it.hasNext()) { |
| 250 | Map.Entry<Long, byte[]> entry = it.next(); |
| 251 | removedBytes += entry.getValue().length; |
| 252 | it.remove(); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 253 | } |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 254 | size.addAndGet(-removedBytes); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 255 | } |
| 256 | }); |
| 257 | } |
| 258 | |
| 259 | @Override |
| 260 | public long size() { |
| 261 | assertIsOpen(); |
| 262 | DB db = txMaker.makeTx(); |
| 263 | try { |
| 264 | Atomic.Long size = db.getAtomicLong(SIZE_FIELD_NAME); |
| 265 | return size.get(); |
| 266 | } finally { |
| 267 | db.close(); |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | @Override |
| 272 | public void sync() throws IOException { |
| 273 | assertIsOpen(); |
| 274 | } |
| 275 | |
| 276 | @Override |
| 277 | public void compact(long index, Entry entry) throws IOException { |
| 278 | |
| 279 | assertIsOpen(); |
| 280 | txMaker.execute(new TxBlock() { |
| 281 | @Override |
| 282 | public void tx(DB db) { |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 283 | BTreeMap<Long, byte[]> log = getLogMap(db); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 284 | Atomic.Long size = db.getAtomicLong(SIZE_FIELD_NAME); |
| 285 | ConcurrentNavigableMap<Long, byte[]> headMap = log.headMap(index); |
Yuta HIGUCHI | ebaa157 | 2014-11-09 19:14:31 -0800 | [diff] [blame] | 286 | Iterator<Map.Entry<Long, byte[]>> it = headMap.entrySet().iterator(); |
| 287 | |
| 288 | long deletedBytes = 0; |
| 289 | while (it.hasNext()) { |
| 290 | Map.Entry<Long, byte[]> e = it.next(); |
| 291 | deletedBytes += e.getValue().length; |
| 292 | it.remove(); |
| 293 | } |
| 294 | size.addAndGet(-deletedBytes); |
| 295 | byte[] entryBytes = verifyNotNull(serializer.encode(entry)); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 296 | byte[] existingEntry = log.put(index, entryBytes); |
Madan Jampani | 348a9fe | 2014-11-09 01:37:51 -0800 | [diff] [blame] | 297 | if (existingEntry != null) { |
| 298 | size.addAndGet(entryBytes.length - existingEntry.length); |
| 299 | } else { |
| 300 | size.addAndGet(entryBytes.length); |
| 301 | } |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 302 | db.compact(); |
| 303 | } |
| 304 | }); |
| 305 | } |
Yuta HIGUCHI | 94ecb89 | 2014-11-06 23:31:44 -0800 | [diff] [blame] | 306 | |
| 307 | private BTreeMap<Long, byte[]> getLogMap(DB db) { |
| 308 | return db.createTreeMap(LOG_NAME) |
| 309 | .valuesOutsideNodesEnable() |
| 310 | .keySerializerWrap(Serializer.LONG) |
| 311 | .valueSerializer(Serializer.BYTE_ARRAY) |
| 312 | .makeOrGet(); |
| 313 | } |
Madan Jampani | 2ee2000 | 2014-11-06 20:06:12 -0800 | [diff] [blame] | 314 | } |