Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 1 | package org.onosproject.store.service.impl; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 2 | |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 3 | import static org.onlab.util.Tools.namedThreads; |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 4 | import static org.slf4j.LoggerFactory.getLogger; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 5 | import static org.onosproject.store.service.impl.ClusterMessagingProtocol.DB_SERIALIZER; |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 6 | |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 7 | import java.io.ByteArrayInputStream; |
| 8 | import java.io.ByteArrayOutputStream; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 9 | import java.util.ArrayList; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 10 | import java.util.Arrays; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 11 | import java.util.List; |
| 12 | import java.util.Map; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 13 | import java.util.Set; |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 14 | import java.util.concurrent.ExecutorService; |
| 15 | import java.util.concurrent.Executors; |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 16 | import java.util.zip.DeflaterOutputStream; |
| 17 | import java.util.zip.InflaterInputStream; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 18 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 19 | import net.kuujo.copycat.Command; |
| 20 | import net.kuujo.copycat.Query; |
| 21 | import net.kuujo.copycat.StateMachine; |
| 22 | |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 23 | import org.onosproject.store.cluster.messaging.MessageSubject; |
| 24 | import org.onosproject.store.service.BatchReadRequest; |
| 25 | import org.onosproject.store.service.BatchWriteRequest; |
| 26 | import org.onosproject.store.service.ReadRequest; |
| 27 | import org.onosproject.store.service.ReadResult; |
| 28 | import org.onosproject.store.service.ReadStatus; |
| 29 | import org.onosproject.store.service.VersionedValue; |
| 30 | import org.onosproject.store.service.WriteRequest; |
| 31 | import org.onosproject.store.service.WriteResult; |
| 32 | import org.onosproject.store.service.WriteStatus; |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 33 | import org.slf4j.Logger; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 34 | |
Madan Jampani | f5d263b | 2014-11-13 10:04:40 -0800 | [diff] [blame] | 35 | import com.google.common.base.MoreObjects; |
Yuta HIGUCHI | 841c0b6 | 2014-11-13 20:27:14 -0800 | [diff] [blame] | 36 | import com.google.common.collect.ImmutableMap; |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 37 | import com.google.common.collect.ImmutableSet; |
Madan Jampani | 932c6ba | 2014-11-12 01:36:04 -0800 | [diff] [blame] | 38 | import com.google.common.collect.Lists; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 39 | import com.google.common.collect.Maps; |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 40 | import com.google.common.collect.Sets; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 41 | |
Madan Jampani | 686fa18 | 2014-11-04 23:16:27 -0800 | [diff] [blame] | 42 | /** |
| 43 | * StateMachine whose transitions are coordinated/replicated |
| 44 | * by Raft consensus. |
| 45 | * Each Raft cluster member has a instance of this state machine that is |
| 46 | * independently updated in lock step once there is consensus |
| 47 | * on the next transition. |
| 48 | */ |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 49 | public class DatabaseStateMachine implements StateMachine { |
| 50 | |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 51 | private final Logger log = getLogger(getClass()); |
| 52 | |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 53 | private final ExecutorService updatesExecutor = |
| 54 | Executors.newSingleThreadExecutor(namedThreads("database-statemachine-updates")); |
| 55 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 56 | // message subject for database update notifications. |
Madan Jampani | 44e6a54 | 2014-11-12 01:06:51 -0800 | [diff] [blame] | 57 | public static final MessageSubject DATABASE_UPDATE_EVENTS = |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 58 | new MessageSubject("database-update-events"); |
| 59 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 60 | private final Set<DatabaseUpdateEventListener> listeners = Sets.newIdentityHashSet(); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 61 | |
| 62 | // durable internal state of the database. |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 63 | private State state = new State(); |
| 64 | |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 65 | // TODO make this configurable |
| 66 | private boolean compressSnapshot = true; |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 67 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 68 | @Command |
| 69 | public boolean createTable(String tableName) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 70 | TableMetadata metadata = new TableMetadata(tableName); |
| 71 | return createTable(metadata); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | @Command |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 75 | public boolean createTable(String tableName, Integer ttlMillis) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 76 | TableMetadata metadata = new TableMetadata(tableName, ttlMillis); |
| 77 | return createTable(metadata); |
| 78 | } |
| 79 | |
| 80 | private boolean createTable(TableMetadata metadata) { |
| 81 | Map<String, VersionedValue> existingTable = state.getTable(metadata.tableName()); |
| 82 | if (existingTable != null) { |
| 83 | return false; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 84 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 85 | state.createTable(metadata); |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 86 | |
| 87 | updatesExecutor.submit(new Runnable() { |
| 88 | @Override |
| 89 | public void run() { |
| 90 | for (DatabaseUpdateEventListener listener : listeners) { |
| 91 | listener.tableCreated(metadata); |
| 92 | } |
| 93 | } |
| 94 | }); |
| 95 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 96 | return true; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | @Command |
| 100 | public boolean dropTable(String tableName) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 101 | if (state.removeTable(tableName)) { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 102 | |
| 103 | updatesExecutor.submit(new Runnable() { |
| 104 | @Override |
| 105 | public void run() { |
| 106 | for (DatabaseUpdateEventListener listener : listeners) { |
| 107 | listener.tableDeleted(tableName); |
| 108 | } |
| 109 | } |
| 110 | }); |
| 111 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 112 | return true; |
| 113 | } |
| 114 | return false; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | @Command |
| 118 | public boolean dropAllTables() { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 119 | Set<String> tableNames = state.getTableNames(); |
| 120 | state.removeAllTables(); |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 121 | |
| 122 | updatesExecutor.submit(new Runnable() { |
| 123 | @Override |
| 124 | public void run() { |
| 125 | for (DatabaseUpdateEventListener listener : listeners) { |
| 126 | for (String tableName : tableNames) { |
| 127 | listener.tableDeleted(tableName); |
| 128 | } |
| 129 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 130 | } |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 131 | }); |
| 132 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 133 | return true; |
| 134 | } |
| 135 | |
| 136 | @Query |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 137 | public Set<String> listTables() { |
| 138 | return ImmutableSet.copyOf(state.getTableNames()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | @Query |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 142 | public List<ReadResult> read(BatchReadRequest batchRequest) { |
| 143 | List<ReadResult> results = new ArrayList<>(batchRequest.batchSize()); |
| 144 | for (ReadRequest request : batchRequest.getAsList()) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 145 | Map<String, VersionedValue> table = state.getTable(request.tableName()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 146 | if (table == null) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 147 | 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] | 148 | continue; |
| 149 | } |
Yuta HIGUCHI | 3bd8cdc | 2014-11-05 19:11:44 -0800 | [diff] [blame] | 150 | VersionedValue value = VersionedValue.copy(table.get(request.key())); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 151 | results.add(new ReadResult(ReadStatus.OK, request.tableName(), request.key(), value)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 152 | } |
| 153 | return results; |
| 154 | } |
| 155 | |
Yuta HIGUCHI | 841c0b6 | 2014-11-13 20:27:14 -0800 | [diff] [blame] | 156 | @Query |
| 157 | public Map<String, VersionedValue> getAll(String tableName) { |
| 158 | return ImmutableMap.copyOf(state.getTable(tableName)); |
| 159 | } |
| 160 | |
| 161 | |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 162 | WriteStatus checkIfApplicable(WriteRequest request, VersionedValue value) { |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 163 | |
| 164 | switch (request.type()) { |
| 165 | case PUT: |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 166 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 167 | |
| 168 | case PUT_IF_ABSENT: |
| 169 | if (value == null) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 170 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 171 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 172 | return WriteStatus.PRECONDITION_VIOLATION; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 173 | |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 174 | case PUT_IF_VALUE: |
| 175 | case REMOVE_IF_VALUE: |
| 176 | if (value != null && Arrays.equals(value.value(), request.oldValue())) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 177 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 178 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 179 | return WriteStatus.PRECONDITION_VIOLATION; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 180 | |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 181 | case PUT_IF_VERSION: |
| 182 | case REMOVE_IF_VERSION: |
| 183 | if (value != null && request.previousVersion() == value.version()) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 184 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 185 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 186 | return WriteStatus.PRECONDITION_VIOLATION; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 187 | |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 188 | case REMOVE: |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 189 | return WriteStatus.OK; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 190 | |
Yuta HIGUCHI | c6b8f61 | 2014-11-06 19:04:13 -0800 | [diff] [blame] | 191 | default: |
| 192 | break; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 193 | } |
| 194 | log.error("Should never reach here {}", request); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 195 | return WriteStatus.ABORTED; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 196 | } |
| 197 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 198 | @Command |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 199 | public List<WriteResult> write(BatchWriteRequest batchRequest) { |
Yuta HIGUCHI | bddc81c4 | 2014-11-05 18:53:09 -0800 | [diff] [blame] | 200 | |
| 201 | // applicability check |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 202 | boolean abort = false; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 203 | List<WriteResult> results = new ArrayList<>(batchRequest.batchSize()); |
| 204 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 205 | for (WriteRequest request : batchRequest.getAsList()) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 206 | Map<String, VersionedValue> table = state.getTable(request.tableName()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 207 | if (table == null) { |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 208 | results.add(new WriteResult(WriteStatus.NO_SUCH_TABLE, null)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 209 | abort = true; |
| 210 | continue; |
| 211 | } |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 212 | final VersionedValue value = table.get(request.key()); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 213 | WriteStatus result = checkIfApplicable(request, value); |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 214 | results.add(new WriteResult(result, value)); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 215 | if (result != WriteStatus.OK) { |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 216 | abort = true; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 217 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 218 | } |
| 219 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 220 | if (abort) { |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 221 | for (int i = 0; i < results.size(); ++i) { |
| 222 | if (results.get(i).status() == WriteStatus.OK) { |
| 223 | results.set(i, new WriteResult(WriteStatus.ABORTED, null)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 224 | } |
| 225 | } |
| 226 | return results; |
| 227 | } |
| 228 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 229 | List<TableModificationEvent> tableModificationEvents = Lists.newLinkedList(); |
| 230 | |
Yuta HIGUCHI | bddc81c4 | 2014-11-05 18:53:09 -0800 | [diff] [blame] | 231 | // apply changes |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 232 | for (WriteRequest request : batchRequest.getAsList()) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 233 | Map<String, VersionedValue> table = state.getTable(request.tableName()); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 234 | |
| 235 | TableModificationEvent tableModificationEvent = null; |
Yuta HIGUCHI | bddc81c4 | 2014-11-05 18:53:09 -0800 | [diff] [blame] | 236 | // FIXME: If this method could be called by multiple thread, |
| 237 | // synchronization scope is wrong. |
| 238 | // Whole function including applicability check needs to be protected. |
| 239 | // Confirm copycat's thread safety requirement for StateMachine |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 240 | // TODO: If we need isolation, we need to block reads also |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 241 | synchronized (table) { |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 242 | switch (request.type()) { |
| 243 | case PUT: |
| 244 | case PUT_IF_ABSENT: |
| 245 | case PUT_IF_VALUE: |
| 246 | case PUT_IF_VERSION: |
| 247 | VersionedValue newValue = new VersionedValue(request.newValue(), state.nextVersion()); |
| 248 | VersionedValue previousValue = table.put(request.key(), newValue); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 249 | WriteResult putResult = new WriteResult(WriteStatus.OK, previousValue); |
| 250 | results.add(putResult); |
| 251 | tableModificationEvent = (previousValue == null) ? |
Madan Jampani | 9b37d57 | 2014-11-12 11:53:24 -0800 | [diff] [blame] | 252 | TableModificationEvent.rowAdded(request.tableName(), request.key(), newValue) : |
| 253 | TableModificationEvent.rowUpdated(request.tableName(), request.key(), newValue); |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 254 | break; |
| 255 | |
| 256 | case REMOVE: |
| 257 | case REMOVE_IF_VALUE: |
| 258 | case REMOVE_IF_VERSION: |
| 259 | VersionedValue removedValue = table.remove(request.key()); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 260 | WriteResult removeResult = new WriteResult(WriteStatus.OK, removedValue); |
| 261 | results.add(removeResult); |
| 262 | if (removedValue != null) { |
| 263 | tableModificationEvent = |
Madan Jampani | 9b37d57 | 2014-11-12 11:53:24 -0800 | [diff] [blame] | 264 | TableModificationEvent.rowDeleted(request.tableName(), request.key(), removedValue); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 265 | } |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 266 | break; |
| 267 | |
| 268 | default: |
| 269 | log.error("Invalid WriteRequest type {}", request.type()); |
| 270 | break; |
| 271 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 272 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 273 | |
| 274 | if (tableModificationEvent != null) { |
| 275 | tableModificationEvents.add(tableModificationEvent); |
| 276 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 277 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 278 | |
| 279 | // notify listeners of table mod events. |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 280 | |
| 281 | updatesExecutor.submit(new Runnable() { |
| 282 | @Override |
| 283 | public void run() { |
| 284 | for (DatabaseUpdateEventListener listener : listeners) { |
| 285 | for (TableModificationEvent tableModificationEvent : tableModificationEvents) { |
| 286 | log.trace("Publishing table modification event: {}", tableModificationEvent); |
| 287 | listener.tableModified(tableModificationEvent); |
| 288 | } |
| 289 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 290 | } |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 291 | }); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 292 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 293 | return results; |
| 294 | } |
| 295 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 296 | public static class State { |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 297 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 298 | private final Map<String, TableMetadata> tableMetadata = Maps.newHashMap(); |
| 299 | private final Map<String, Map<String, VersionedValue>> tableData = Maps.newHashMap(); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 300 | private long versionCounter = 1; |
| 301 | |
Yuta HIGUCHI | 4490a73 | 2014-11-18 20:20:30 -0800 | [diff] [blame] | 302 | Map<String, VersionedValue> getTable(String tableName) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 303 | return tableData.get(tableName); |
| 304 | } |
| 305 | |
| 306 | void createTable(TableMetadata metadata) { |
| 307 | tableMetadata.put(metadata.tableName, metadata); |
| 308 | tableData.put(metadata.tableName, Maps.newHashMap()); |
| 309 | } |
| 310 | |
| 311 | TableMetadata getTableMetadata(String tableName) { |
| 312 | return tableMetadata.get(tableName); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | long nextVersion() { |
| 316 | return versionCounter++; |
| 317 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 318 | |
| 319 | Set<String> getTableNames() { |
| 320 | return ImmutableSet.copyOf(tableMetadata.keySet()); |
| 321 | } |
| 322 | |
| 323 | |
| 324 | boolean removeTable(String tableName) { |
| 325 | if (!tableMetadata.containsKey(tableName)) { |
| 326 | return false; |
| 327 | } |
| 328 | tableMetadata.remove(tableName); |
| 329 | tableData.remove(tableName); |
| 330 | return true; |
| 331 | } |
| 332 | |
| 333 | void removeAllTables() { |
| 334 | tableMetadata.clear(); |
| 335 | tableData.clear(); |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | public static class TableMetadata { |
| 340 | private final String tableName; |
| 341 | private final boolean expireOldEntries; |
| 342 | private final int ttlMillis; |
| 343 | |
| 344 | public TableMetadata(String tableName) { |
| 345 | this.tableName = tableName; |
| 346 | this.expireOldEntries = false; |
| 347 | this.ttlMillis = Integer.MAX_VALUE; |
| 348 | |
| 349 | } |
| 350 | |
| 351 | public TableMetadata(String tableName, int ttlMillis) { |
| 352 | this.tableName = tableName; |
| 353 | this.expireOldEntries = true; |
| 354 | this.ttlMillis = ttlMillis; |
| 355 | } |
| 356 | |
| 357 | public String tableName() { |
| 358 | return tableName; |
| 359 | } |
| 360 | |
| 361 | public boolean expireOldEntries() { |
| 362 | return expireOldEntries; |
| 363 | } |
| 364 | |
| 365 | public int ttlMillis() { |
| 366 | return ttlMillis; |
| 367 | } |
Madan Jampani | f5d263b | 2014-11-13 10:04:40 -0800 | [diff] [blame] | 368 | |
| 369 | @Override |
| 370 | public String toString() { |
| 371 | return MoreObjects.toStringHelper(getClass()) |
| 372 | .add("tableName", tableName) |
| 373 | .add("expireOldEntries", expireOldEntries) |
| 374 | .add("ttlMillis", ttlMillis) |
| 375 | .toString(); |
| 376 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | @Override |
| 380 | public byte[] takeSnapshot() { |
| 381 | try { |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 382 | if (compressSnapshot) { |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 383 | byte[] input = DB_SERIALIZER.encode(state); |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 384 | ByteArrayOutputStream comp = new ByteArrayOutputStream(input.length); |
| 385 | DeflaterOutputStream compressor = new DeflaterOutputStream(comp); |
| 386 | compressor.write(input, 0, input.length); |
| 387 | compressor.close(); |
| 388 | return comp.toByteArray(); |
| 389 | } else { |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 390 | return DB_SERIALIZER.encode(state); |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 391 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 392 | } catch (Exception e) { |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 393 | log.error("Failed to take snapshot", e); |
| 394 | throw new SnapshotException(e); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 395 | } |
| 396 | } |
| 397 | |
| 398 | @Override |
| 399 | public void installSnapshot(byte[] data) { |
| 400 | try { |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 401 | if (compressSnapshot) { |
| 402 | ByteArrayInputStream in = new ByteArrayInputStream(data); |
| 403 | InflaterInputStream decompressor = new InflaterInputStream(in); |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 404 | this.state = DB_SERIALIZER.decode(decompressor); |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 405 | } else { |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 406 | this.state = DB_SERIALIZER.decode(data); |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 407 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 408 | |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 409 | updatesExecutor.submit(new Runnable() { |
| 410 | @Override |
| 411 | public void run() { |
| 412 | for (DatabaseUpdateEventListener listener : listeners) { |
| 413 | listener.snapshotInstalled(state); |
| 414 | } |
| 415 | } |
| 416 | }); |
| 417 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 418 | } catch (Exception e) { |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 419 | log.error("Failed to install from snapshot", e); |
| 420 | throw new SnapshotException(e); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 421 | } |
| 422 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 423 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 424 | /** |
| 425 | * Adds specified DatabaseUpdateEventListener. |
| 426 | * @param listener listener to add |
| 427 | */ |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 428 | public void addEventListener(DatabaseUpdateEventListener listener) { |
| 429 | listeners.add(listener); |
| 430 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 431 | |
| 432 | /** |
| 433 | * Removes specified DatabaseUpdateEventListener. |
| 434 | * @param listener listener to remove |
| 435 | */ |
| 436 | public void removeEventListener(DatabaseUpdateEventListener listener) { |
| 437 | listeners.remove(listener); |
| 438 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 439 | } |