Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 1 | package org.onlab.onos.store.service.impl; |
| 2 | |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 3 | import static org.slf4j.LoggerFactory.getLogger; |
| 4 | |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 5 | import java.io.ByteArrayInputStream; |
| 6 | import java.io.ByteArrayOutputStream; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 7 | import java.util.ArrayList; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 8 | import java.util.Arrays; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 9 | import java.util.List; |
| 10 | import java.util.Map; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 11 | import java.util.Set; |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 12 | import java.util.zip.DeflaterOutputStream; |
| 13 | import java.util.zip.InflaterInputStream; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 14 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 15 | import net.kuujo.copycat.Command; |
| 16 | import net.kuujo.copycat.Query; |
| 17 | import net.kuujo.copycat.StateMachine; |
| 18 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 19 | import org.onlab.onos.store.cluster.messaging.MessageSubject; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 20 | import org.onlab.onos.store.serializers.KryoSerializer; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 21 | import org.onlab.onos.store.service.BatchReadRequest; |
| 22 | import org.onlab.onos.store.service.BatchWriteRequest; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 23 | import org.onlab.onos.store.service.ReadRequest; |
| 24 | import org.onlab.onos.store.service.ReadResult; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 25 | import org.onlab.onos.store.service.ReadStatus; |
Madan Jampani | 37c2e70 | 2014-11-04 18:11:10 -0800 | [diff] [blame] | 26 | import org.onlab.onos.store.service.VersionedValue; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 27 | import org.onlab.onos.store.service.WriteRequest; |
| 28 | import org.onlab.onos.store.service.WriteResult; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 29 | import org.onlab.onos.store.service.WriteStatus; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 30 | import org.onlab.util.KryoNamespace; |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 31 | import org.slf4j.Logger; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 32 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 33 | import com.google.common.collect.ImmutableSet; |
Madan Jampani | 932c6ba | 2014-11-12 01:36:04 -0800 | [diff] [blame] | 34 | import com.google.common.collect.Lists; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 35 | import com.google.common.collect.Maps; |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 36 | import com.google.common.collect.Sets; |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 37 | import com.google.common.io.ByteStreams; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 38 | |
Madan Jampani | 686fa18 | 2014-11-04 23:16:27 -0800 | [diff] [blame] | 39 | /** |
| 40 | * StateMachine whose transitions are coordinated/replicated |
| 41 | * by Raft consensus. |
| 42 | * Each Raft cluster member has a instance of this state machine that is |
| 43 | * independently updated in lock step once there is consensus |
| 44 | * on the next transition. |
| 45 | */ |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 46 | public class DatabaseStateMachine implements StateMachine { |
| 47 | |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 48 | private final Logger log = getLogger(getClass()); |
| 49 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 50 | // message subject for database update notifications. |
Madan Jampani | 44e6a54 | 2014-11-12 01:06:51 -0800 | [diff] [blame] | 51 | public static final MessageSubject DATABASE_UPDATE_EVENTS = |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 52 | new MessageSubject("database-update-events"); |
| 53 | |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 54 | // serializer used for snapshot |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 55 | public static final KryoSerializer SERIALIZER = new KryoSerializer() { |
| 56 | @Override |
| 57 | protected void setupKryoPool() { |
| 58 | serializerPool = KryoNamespace.newBuilder() |
| 59 | .register(VersionedValue.class) |
| 60 | .register(State.class) |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 61 | .register(TableMetadata.class) |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 62 | .register(BatchReadRequest.class) |
| 63 | .register(BatchWriteRequest.class) |
| 64 | .register(ReadStatus.class) |
| 65 | .register(WriteStatus.class) |
| 66 | // TODO: Move this out ? |
| 67 | .register(TableModificationEvent.class) |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 68 | .register(ClusterMessagingProtocol.COMMON) |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 69 | .build() |
| 70 | .populate(1); |
| 71 | } |
| 72 | }; |
| 73 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 74 | private final Set<DatabaseUpdateEventListener> listeners = Sets.newIdentityHashSet(); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 75 | |
| 76 | // durable internal state of the database. |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 77 | private State state = new State(); |
| 78 | |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 79 | private boolean compressSnapshot = false; |
| 80 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 81 | @Command |
| 82 | public boolean createTable(String tableName) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 83 | TableMetadata metadata = new TableMetadata(tableName); |
| 84 | return createTable(metadata); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | @Command |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 88 | public boolean createTable(String tableName, int ttlMillis) { |
| 89 | TableMetadata metadata = new TableMetadata(tableName, ttlMillis); |
| 90 | return createTable(metadata); |
| 91 | } |
| 92 | |
| 93 | private boolean createTable(TableMetadata metadata) { |
| 94 | Map<String, VersionedValue> existingTable = state.getTable(metadata.tableName()); |
| 95 | if (existingTable != null) { |
| 96 | return false; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 97 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 98 | state.createTable(metadata); |
| 99 | for (DatabaseUpdateEventListener listener : listeners) { |
| 100 | listener.tableCreated(metadata); |
| 101 | } |
| 102 | return true; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | @Command |
| 106 | public boolean dropTable(String tableName) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 107 | if (state.removeTable(tableName)) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 108 | for (DatabaseUpdateEventListener listener : listeners) { |
| 109 | listener.tableDeleted(tableName); |
| 110 | } |
| 111 | return true; |
| 112 | } |
| 113 | return false; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | @Command |
| 117 | public boolean dropAllTables() { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 118 | Set<String> tableNames = state.getTableNames(); |
| 119 | state.removeAllTables(); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 120 | for (DatabaseUpdateEventListener listener : listeners) { |
| 121 | for (String tableName : tableNames) { |
| 122 | listener.tableDeleted(tableName); |
| 123 | } |
| 124 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 125 | return true; |
| 126 | } |
| 127 | |
| 128 | @Query |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 129 | public Set<String> listTables() { |
| 130 | return ImmutableSet.copyOf(state.getTableNames()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | @Query |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 134 | public List<ReadResult> read(BatchReadRequest batchRequest) { |
| 135 | List<ReadResult> results = new ArrayList<>(batchRequest.batchSize()); |
| 136 | for (ReadRequest request : batchRequest.getAsList()) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 137 | Map<String, VersionedValue> table = state.getTable(request.tableName()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 138 | if (table == null) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 139 | results.add(new ReadResult(ReadStatus.NO_SUCH_TABLE, request.tableName(), request.key(), null)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 140 | continue; |
| 141 | } |
Yuta HIGUCHI | 3bd8cdc | 2014-11-05 19:11:44 -0800 | [diff] [blame] | 142 | VersionedValue value = VersionedValue.copy(table.get(request.key())); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 143 | results.add(new ReadResult(ReadStatus.OK, request.tableName(), request.key(), value)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 144 | } |
| 145 | return results; |
| 146 | } |
| 147 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 148 | WriteStatus checkIfApplicable(WriteRequest request, |
| 149 | VersionedValue value) { |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 150 | |
| 151 | switch (request.type()) { |
| 152 | case PUT: |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 153 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 154 | |
| 155 | case PUT_IF_ABSENT: |
| 156 | if (value == null) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 157 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 158 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 159 | return WriteStatus.PRECONDITION_VIOLATION; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 160 | case PUT_IF_VALUE: |
| 161 | case REMOVE_IF_VALUE: |
| 162 | if (value != null && Arrays.equals(value.value(), request.oldValue())) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 163 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 164 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 165 | return WriteStatus.PRECONDITION_VIOLATION; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 166 | case PUT_IF_VERSION: |
| 167 | case REMOVE_IF_VERSION: |
| 168 | if (value != null && request.previousVersion() == value.version()) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 169 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 170 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 171 | return WriteStatus.PRECONDITION_VIOLATION; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 172 | case REMOVE: |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 173 | return WriteStatus.OK; |
Yuta HIGUCHI | c6b8f61 | 2014-11-06 19:04:13 -0800 | [diff] [blame] | 174 | default: |
| 175 | break; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 176 | } |
| 177 | log.error("Should never reach here {}", request); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 178 | return WriteStatus.ABORTED; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 179 | } |
| 180 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 181 | @Command |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 182 | public List<WriteResult> write(BatchWriteRequest batchRequest) { |
Yuta HIGUCHI | bddc81c4 | 2014-11-05 18:53:09 -0800 | [diff] [blame] | 183 | |
| 184 | // applicability check |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 185 | boolean abort = false; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 186 | List<WriteStatus> validationResults = new ArrayList<>(batchRequest.batchSize()); |
| 187 | for (WriteRequest request : batchRequest.getAsList()) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 188 | Map<String, VersionedValue> table = state.getTable(request.tableName()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 189 | if (table == null) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 190 | validationResults.add(WriteStatus.NO_SUCH_TABLE); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 191 | abort = true; |
| 192 | continue; |
| 193 | } |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 194 | final VersionedValue value = table.get(request.key()); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 195 | WriteStatus result = checkIfApplicable(request, value); |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 196 | validationResults.add(result); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 197 | if (result != WriteStatus.OK) { |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 198 | abort = true; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 199 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 200 | } |
| 201 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 202 | List<WriteResult> results = new ArrayList<>(batchRequest.batchSize()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 203 | |
| 204 | if (abort) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 205 | for (WriteStatus validationResult : validationResults) { |
| 206 | if (validationResult == WriteStatus.OK) { |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 207 | // aborted due to applicability check failure on other request |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 208 | results.add(new WriteResult(WriteStatus.ABORTED, null)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 209 | } else { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 210 | results.add(new WriteResult(validationResult, null)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 211 | } |
| 212 | } |
| 213 | return results; |
| 214 | } |
| 215 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 216 | List<TableModificationEvent> tableModificationEvents = Lists.newLinkedList(); |
| 217 | |
Yuta HIGUCHI | bddc81c4 | 2014-11-05 18:53:09 -0800 | [diff] [blame] | 218 | // apply changes |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 219 | for (WriteRequest request : batchRequest.getAsList()) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 220 | Map<String, VersionedValue> table = state.getTable(request.tableName()); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 221 | |
| 222 | TableModificationEvent tableModificationEvent = null; |
Yuta HIGUCHI | bddc81c4 | 2014-11-05 18:53:09 -0800 | [diff] [blame] | 223 | // FIXME: If this method could be called by multiple thread, |
| 224 | // synchronization scope is wrong. |
| 225 | // Whole function including applicability check needs to be protected. |
| 226 | // Confirm copycat's thread safety requirement for StateMachine |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 227 | // TODO: If we need isolation, we need to block reads also |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 228 | synchronized (table) { |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 229 | switch (request.type()) { |
| 230 | case PUT: |
| 231 | case PUT_IF_ABSENT: |
| 232 | case PUT_IF_VALUE: |
| 233 | case PUT_IF_VERSION: |
| 234 | VersionedValue newValue = new VersionedValue(request.newValue(), state.nextVersion()); |
| 235 | VersionedValue previousValue = table.put(request.key(), newValue); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 236 | WriteResult putResult = new WriteResult(WriteStatus.OK, previousValue); |
| 237 | results.add(putResult); |
| 238 | tableModificationEvent = (previousValue == null) ? |
Madan Jampani | 9b37d57 | 2014-11-12 11:53:24 -0800 | [diff] [blame] | 239 | TableModificationEvent.rowAdded(request.tableName(), request.key(), newValue) : |
| 240 | TableModificationEvent.rowUpdated(request.tableName(), request.key(), newValue); |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 241 | break; |
| 242 | |
| 243 | case REMOVE: |
| 244 | case REMOVE_IF_VALUE: |
| 245 | case REMOVE_IF_VERSION: |
| 246 | VersionedValue removedValue = table.remove(request.key()); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 247 | WriteResult removeResult = new WriteResult(WriteStatus.OK, removedValue); |
| 248 | results.add(removeResult); |
| 249 | if (removedValue != null) { |
| 250 | tableModificationEvent = |
Madan Jampani | 9b37d57 | 2014-11-12 11:53:24 -0800 | [diff] [blame] | 251 | TableModificationEvent.rowDeleted(request.tableName(), request.key(), removedValue); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 252 | } |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 253 | break; |
| 254 | |
| 255 | default: |
| 256 | log.error("Invalid WriteRequest type {}", request.type()); |
| 257 | break; |
| 258 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 259 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 260 | |
| 261 | if (tableModificationEvent != null) { |
| 262 | tableModificationEvents.add(tableModificationEvent); |
| 263 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 264 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 265 | |
| 266 | // notify listeners of table mod events. |
| 267 | for (DatabaseUpdateEventListener listener : listeners) { |
| 268 | for (TableModificationEvent tableModificationEvent : tableModificationEvents) { |
| 269 | listener.tableModified(tableModificationEvent); |
| 270 | } |
| 271 | } |
| 272 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 273 | return results; |
| 274 | } |
| 275 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 276 | public static class State { |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 277 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 278 | private final Map<String, TableMetadata> tableMetadata = Maps.newHashMap(); |
| 279 | private final Map<String, Map<String, VersionedValue>> tableData = Maps.newHashMap(); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 280 | private long versionCounter = 1; |
| 281 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 282 | public Map<String, VersionedValue> getTable(String tableName) { |
| 283 | return tableData.get(tableName); |
| 284 | } |
| 285 | |
| 286 | void createTable(TableMetadata metadata) { |
| 287 | tableMetadata.put(metadata.tableName, metadata); |
| 288 | tableData.put(metadata.tableName, Maps.newHashMap()); |
| 289 | } |
| 290 | |
| 291 | TableMetadata getTableMetadata(String tableName) { |
| 292 | return tableMetadata.get(tableName); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | long nextVersion() { |
| 296 | return versionCounter++; |
| 297 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 298 | |
| 299 | Set<String> getTableNames() { |
| 300 | return ImmutableSet.copyOf(tableMetadata.keySet()); |
| 301 | } |
| 302 | |
| 303 | |
| 304 | boolean removeTable(String tableName) { |
| 305 | if (!tableMetadata.containsKey(tableName)) { |
| 306 | return false; |
| 307 | } |
| 308 | tableMetadata.remove(tableName); |
| 309 | tableData.remove(tableName); |
| 310 | return true; |
| 311 | } |
| 312 | |
| 313 | void removeAllTables() { |
| 314 | tableMetadata.clear(); |
| 315 | tableData.clear(); |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | public static class TableMetadata { |
| 320 | private final String tableName; |
| 321 | private final boolean expireOldEntries; |
| 322 | private final int ttlMillis; |
| 323 | |
| 324 | public TableMetadata(String tableName) { |
| 325 | this.tableName = tableName; |
| 326 | this.expireOldEntries = false; |
| 327 | this.ttlMillis = Integer.MAX_VALUE; |
| 328 | |
| 329 | } |
| 330 | |
| 331 | public TableMetadata(String tableName, int ttlMillis) { |
| 332 | this.tableName = tableName; |
| 333 | this.expireOldEntries = true; |
| 334 | this.ttlMillis = ttlMillis; |
| 335 | } |
| 336 | |
| 337 | public String tableName() { |
| 338 | return tableName; |
| 339 | } |
| 340 | |
| 341 | public boolean expireOldEntries() { |
| 342 | return expireOldEntries; |
| 343 | } |
| 344 | |
| 345 | public int ttlMillis() { |
| 346 | return ttlMillis; |
| 347 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | @Override |
| 351 | public byte[] takeSnapshot() { |
| 352 | try { |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 353 | if (compressSnapshot) { |
| 354 | byte[] input = SERIALIZER.encode(state); |
| 355 | ByteArrayOutputStream comp = new ByteArrayOutputStream(input.length); |
| 356 | DeflaterOutputStream compressor = new DeflaterOutputStream(comp); |
| 357 | compressor.write(input, 0, input.length); |
| 358 | compressor.close(); |
| 359 | return comp.toByteArray(); |
| 360 | } else { |
| 361 | return SERIALIZER.encode(state); |
| 362 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 363 | } catch (Exception e) { |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 364 | log.error("Failed to take snapshot", e); |
| 365 | throw new SnapshotException(e); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 366 | } |
| 367 | } |
| 368 | |
| 369 | @Override |
| 370 | public void installSnapshot(byte[] data) { |
| 371 | try { |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 372 | if (compressSnapshot) { |
| 373 | ByteArrayInputStream in = new ByteArrayInputStream(data); |
| 374 | InflaterInputStream decompressor = new InflaterInputStream(in); |
| 375 | ByteStreams.toByteArray(decompressor); |
| 376 | this.state = SERIALIZER.decode(ByteStreams.toByteArray(decompressor)); |
| 377 | } else { |
| 378 | this.state = SERIALIZER.decode(data); |
| 379 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 380 | |
| 381 | // FIXME: synchronize. |
| 382 | for (DatabaseUpdateEventListener listener : listeners) { |
| 383 | listener.snapshotInstalled(state); |
| 384 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 385 | } catch (Exception e) { |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 386 | log.error("Failed to install from snapshot", e); |
| 387 | throw new SnapshotException(e); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 388 | } |
| 389 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 390 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 391 | /** |
| 392 | * Adds specified DatabaseUpdateEventListener. |
| 393 | * @param listener listener to add |
| 394 | */ |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 395 | public void addEventListener(DatabaseUpdateEventListener listener) { |
| 396 | listeners.add(listener); |
| 397 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 398 | |
| 399 | /** |
| 400 | * Removes specified DatabaseUpdateEventListener. |
| 401 | * @param listener listener to remove |
| 402 | */ |
| 403 | public void removeEventListener(DatabaseUpdateEventListener listener) { |
| 404 | listeners.remove(listener); |
| 405 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 406 | } |