alshabib | ab98466 | 2014-12-04 18:56:18 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2014 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 | */ |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 16 | package org.onosproject.store.service.impl; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 17 | |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 18 | import static org.onlab.util.Tools.namedThreads; |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 19 | import static org.slf4j.LoggerFactory.getLogger; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 20 | import static org.onosproject.store.service.impl.ClusterMessagingProtocol.DB_SERIALIZER; |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 21 | |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 22 | import java.io.ByteArrayInputStream; |
| 23 | import java.io.ByteArrayOutputStream; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 24 | import java.util.ArrayList; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 25 | import java.util.Arrays; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 26 | import java.util.List; |
| 27 | import java.util.Map; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 28 | import java.util.Set; |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 29 | import java.util.concurrent.ExecutorService; |
| 30 | import java.util.concurrent.Executors; |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 31 | import java.util.zip.DeflaterOutputStream; |
| 32 | import java.util.zip.InflaterInputStream; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 33 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 34 | import net.kuujo.copycat.Command; |
| 35 | import net.kuujo.copycat.Query; |
| 36 | import net.kuujo.copycat.StateMachine; |
| 37 | |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 38 | import org.onosproject.store.cluster.messaging.MessageSubject; |
| 39 | import org.onosproject.store.service.BatchReadRequest; |
| 40 | import org.onosproject.store.service.BatchWriteRequest; |
| 41 | import org.onosproject.store.service.ReadRequest; |
| 42 | import org.onosproject.store.service.ReadResult; |
| 43 | import org.onosproject.store.service.ReadStatus; |
| 44 | import org.onosproject.store.service.VersionedValue; |
| 45 | import org.onosproject.store.service.WriteRequest; |
| 46 | import org.onosproject.store.service.WriteResult; |
| 47 | import org.onosproject.store.service.WriteStatus; |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 48 | import org.slf4j.Logger; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 49 | |
Madan Jampani | f5d263b | 2014-11-13 10:04:40 -0800 | [diff] [blame] | 50 | import com.google.common.base.MoreObjects; |
Yuta HIGUCHI | 841c0b6 | 2014-11-13 20:27:14 -0800 | [diff] [blame] | 51 | import com.google.common.collect.ImmutableMap; |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 52 | import com.google.common.collect.ImmutableSet; |
Madan Jampani | 932c6ba | 2014-11-12 01:36:04 -0800 | [diff] [blame] | 53 | import com.google.common.collect.Lists; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 54 | import com.google.common.collect.Maps; |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 55 | import com.google.common.collect.Sets; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 56 | |
Madan Jampani | 686fa18 | 2014-11-04 23:16:27 -0800 | [diff] [blame] | 57 | /** |
| 58 | * StateMachine whose transitions are coordinated/replicated |
| 59 | * by Raft consensus. |
| 60 | * Each Raft cluster member has a instance of this state machine that is |
| 61 | * independently updated in lock step once there is consensus |
| 62 | * on the next transition. |
| 63 | */ |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 64 | public class DatabaseStateMachine implements StateMachine { |
| 65 | |
Yuta HIGUCHI | 39ae550 | 2014-11-05 16:42:12 -0800 | [diff] [blame] | 66 | private final Logger log = getLogger(getClass()); |
| 67 | |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 68 | private final ExecutorService updatesExecutor = |
| 69 | Executors.newSingleThreadExecutor(namedThreads("database-statemachine-updates")); |
| 70 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 71 | // message subject for database update notifications. |
Madan Jampani | 44e6a54 | 2014-11-12 01:06:51 -0800 | [diff] [blame] | 72 | public static final MessageSubject DATABASE_UPDATE_EVENTS = |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 73 | new MessageSubject("database-update-events"); |
| 74 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 75 | private final Set<DatabaseUpdateEventListener> listeners = Sets.newIdentityHashSet(); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 76 | |
| 77 | // durable internal state of the database. |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 78 | private State state = new State(); |
| 79 | |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 80 | // TODO make this configurable |
| 81 | private boolean compressSnapshot = true; |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 82 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 83 | @Command |
| 84 | public boolean createTable(String tableName) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 85 | TableMetadata metadata = new TableMetadata(tableName); |
| 86 | return createTable(metadata); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | @Command |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 90 | public boolean createTable(String tableName, Integer ttlMillis) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 91 | TableMetadata metadata = new TableMetadata(tableName, ttlMillis); |
| 92 | return createTable(metadata); |
| 93 | } |
| 94 | |
| 95 | private boolean createTable(TableMetadata metadata) { |
| 96 | Map<String, VersionedValue> existingTable = state.getTable(metadata.tableName()); |
| 97 | if (existingTable != null) { |
| 98 | return false; |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 99 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 100 | state.createTable(metadata); |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 101 | |
| 102 | updatesExecutor.submit(new Runnable() { |
| 103 | @Override |
| 104 | public void run() { |
| 105 | for (DatabaseUpdateEventListener listener : listeners) { |
| 106 | listener.tableCreated(metadata); |
| 107 | } |
| 108 | } |
| 109 | }); |
| 110 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 111 | return true; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | @Command |
| 115 | public boolean dropTable(String tableName) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 116 | if (state.removeTable(tableName)) { |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 117 | |
| 118 | updatesExecutor.submit(new Runnable() { |
| 119 | @Override |
| 120 | public void run() { |
| 121 | for (DatabaseUpdateEventListener listener : listeners) { |
| 122 | listener.tableDeleted(tableName); |
| 123 | } |
| 124 | } |
| 125 | }); |
| 126 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 127 | return true; |
| 128 | } |
| 129 | return false; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | @Command |
| 133 | public boolean dropAllTables() { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 134 | Set<String> tableNames = state.getTableNames(); |
| 135 | state.removeAllTables(); |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 136 | |
| 137 | updatesExecutor.submit(new Runnable() { |
| 138 | @Override |
| 139 | public void run() { |
| 140 | for (DatabaseUpdateEventListener listener : listeners) { |
| 141 | for (String tableName : tableNames) { |
| 142 | listener.tableDeleted(tableName); |
| 143 | } |
| 144 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 145 | } |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 146 | }); |
| 147 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 148 | return true; |
| 149 | } |
| 150 | |
| 151 | @Query |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 152 | public Set<String> listTables() { |
| 153 | return ImmutableSet.copyOf(state.getTableNames()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | @Query |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 157 | public List<ReadResult> read(BatchReadRequest batchRequest) { |
| 158 | List<ReadResult> results = new ArrayList<>(batchRequest.batchSize()); |
| 159 | for (ReadRequest request : batchRequest.getAsList()) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 160 | Map<String, VersionedValue> table = state.getTable(request.tableName()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 161 | if (table == null) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 162 | 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] | 163 | continue; |
| 164 | } |
Yuta HIGUCHI | 3bd8cdc | 2014-11-05 19:11:44 -0800 | [diff] [blame] | 165 | VersionedValue value = VersionedValue.copy(table.get(request.key())); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 166 | results.add(new ReadResult(ReadStatus.OK, request.tableName(), request.key(), value)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 167 | } |
| 168 | return results; |
| 169 | } |
| 170 | |
Yuta HIGUCHI | 841c0b6 | 2014-11-13 20:27:14 -0800 | [diff] [blame] | 171 | @Query |
| 172 | public Map<String, VersionedValue> getAll(String tableName) { |
| 173 | return ImmutableMap.copyOf(state.getTable(tableName)); |
| 174 | } |
| 175 | |
| 176 | |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 177 | WriteStatus checkIfApplicable(WriteRequest request, VersionedValue value) { |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 178 | |
| 179 | switch (request.type()) { |
| 180 | case PUT: |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 181 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 182 | |
| 183 | case PUT_IF_ABSENT: |
| 184 | if (value == null) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 185 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 186 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 187 | return WriteStatus.PRECONDITION_VIOLATION; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 188 | |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 189 | case PUT_IF_VALUE: |
| 190 | case REMOVE_IF_VALUE: |
| 191 | if (value != null && Arrays.equals(value.value(), request.oldValue())) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 192 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 193 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 194 | return WriteStatus.PRECONDITION_VIOLATION; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 195 | |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 196 | case PUT_IF_VERSION: |
| 197 | case REMOVE_IF_VERSION: |
| 198 | if (value != null && request.previousVersion() == value.version()) { |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 199 | return WriteStatus.OK; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 200 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 201 | return WriteStatus.PRECONDITION_VIOLATION; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 202 | |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 203 | case REMOVE: |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 204 | return WriteStatus.OK; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 205 | |
Yuta HIGUCHI | c6b8f61 | 2014-11-06 19:04:13 -0800 | [diff] [blame] | 206 | default: |
| 207 | break; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 208 | } |
| 209 | log.error("Should never reach here {}", request); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 210 | return WriteStatus.ABORTED; |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 211 | } |
| 212 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 213 | @Command |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 214 | public List<WriteResult> write(BatchWriteRequest batchRequest) { |
Yuta HIGUCHI | bddc81c4 | 2014-11-05 18:53:09 -0800 | [diff] [blame] | 215 | |
| 216 | // applicability check |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 217 | boolean abort = false; |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 218 | List<WriteResult> results = new ArrayList<>(batchRequest.batchSize()); |
| 219 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 220 | for (WriteRequest request : batchRequest.getAsList()) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 221 | Map<String, VersionedValue> table = state.getTable(request.tableName()); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 222 | if (table == null) { |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 223 | results.add(new WriteResult(WriteStatus.NO_SUCH_TABLE, null)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 224 | abort = true; |
| 225 | continue; |
| 226 | } |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 227 | final VersionedValue value = table.get(request.key()); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 228 | WriteStatus result = checkIfApplicable(request, value); |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 229 | results.add(new WriteResult(result, value)); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 230 | if (result != WriteStatus.OK) { |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 231 | abort = true; |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 232 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 233 | } |
| 234 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 235 | if (abort) { |
Yuta HIGUCHI | fd0db48 | 2014-11-14 16:03:26 -0800 | [diff] [blame] | 236 | for (int i = 0; i < results.size(); ++i) { |
| 237 | if (results.get(i).status() == WriteStatus.OK) { |
| 238 | results.set(i, new WriteResult(WriteStatus.ABORTED, null)); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 239 | } |
| 240 | } |
| 241 | return results; |
| 242 | } |
| 243 | |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 244 | List<TableModificationEvent> tableModificationEvents = Lists.newLinkedList(); |
| 245 | |
Yuta HIGUCHI | bddc81c4 | 2014-11-05 18:53:09 -0800 | [diff] [blame] | 246 | // apply changes |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 247 | for (WriteRequest request : batchRequest.getAsList()) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 248 | Map<String, VersionedValue> table = state.getTable(request.tableName()); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 249 | |
| 250 | TableModificationEvent tableModificationEvent = null; |
Yuta HIGUCHI | bddc81c4 | 2014-11-05 18:53:09 -0800 | [diff] [blame] | 251 | // FIXME: If this method could be called by multiple thread, |
| 252 | // synchronization scope is wrong. |
| 253 | // Whole function including applicability check needs to be protected. |
| 254 | // Confirm copycat's thread safety requirement for StateMachine |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 255 | // TODO: If we need isolation, we need to block reads also |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 256 | synchronized (table) { |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 257 | switch (request.type()) { |
| 258 | case PUT: |
| 259 | case PUT_IF_ABSENT: |
| 260 | case PUT_IF_VALUE: |
| 261 | case PUT_IF_VERSION: |
| 262 | VersionedValue newValue = new VersionedValue(request.newValue(), state.nextVersion()); |
| 263 | VersionedValue previousValue = table.put(request.key(), newValue); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 264 | WriteResult putResult = new WriteResult(WriteStatus.OK, previousValue); |
| 265 | results.add(putResult); |
| 266 | tableModificationEvent = (previousValue == null) ? |
Madan Jampani | 9b37d57 | 2014-11-12 11:53:24 -0800 | [diff] [blame] | 267 | TableModificationEvent.rowAdded(request.tableName(), request.key(), newValue) : |
| 268 | TableModificationEvent.rowUpdated(request.tableName(), request.key(), newValue); |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 269 | break; |
| 270 | |
| 271 | case REMOVE: |
| 272 | case REMOVE_IF_VALUE: |
| 273 | case REMOVE_IF_VERSION: |
| 274 | VersionedValue removedValue = table.remove(request.key()); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 275 | WriteResult removeResult = new WriteResult(WriteStatus.OK, removedValue); |
| 276 | results.add(removeResult); |
| 277 | if (removedValue != null) { |
| 278 | tableModificationEvent = |
Madan Jampani | 9b37d57 | 2014-11-12 11:53:24 -0800 | [diff] [blame] | 279 | TableModificationEvent.rowDeleted(request.tableName(), request.key(), removedValue); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 280 | } |
Yuta HIGUCHI | 361664e | 2014-11-06 17:28:47 -0800 | [diff] [blame] | 281 | break; |
| 282 | |
| 283 | default: |
| 284 | log.error("Invalid WriteRequest type {}", request.type()); |
| 285 | break; |
| 286 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 287 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 288 | |
| 289 | if (tableModificationEvent != null) { |
| 290 | tableModificationEvents.add(tableModificationEvent); |
| 291 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 292 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 293 | |
| 294 | // notify listeners of table mod events. |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 295 | |
| 296 | updatesExecutor.submit(new Runnable() { |
| 297 | @Override |
| 298 | public void run() { |
| 299 | for (DatabaseUpdateEventListener listener : listeners) { |
| 300 | for (TableModificationEvent tableModificationEvent : tableModificationEvents) { |
| 301 | log.trace("Publishing table modification event: {}", tableModificationEvent); |
| 302 | listener.tableModified(tableModificationEvent); |
| 303 | } |
| 304 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 305 | } |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 306 | }); |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 307 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 308 | return results; |
| 309 | } |
| 310 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 311 | public static class State { |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 312 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 313 | private final Map<String, TableMetadata> tableMetadata = Maps.newHashMap(); |
| 314 | private final Map<String, Map<String, VersionedValue>> tableData = Maps.newHashMap(); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 315 | private long versionCounter = 1; |
| 316 | |
Yuta HIGUCHI | 4490a73 | 2014-11-18 20:20:30 -0800 | [diff] [blame] | 317 | Map<String, VersionedValue> getTable(String tableName) { |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 318 | return tableData.get(tableName); |
| 319 | } |
| 320 | |
| 321 | void createTable(TableMetadata metadata) { |
| 322 | tableMetadata.put(metadata.tableName, metadata); |
| 323 | tableData.put(metadata.tableName, Maps.newHashMap()); |
| 324 | } |
| 325 | |
| 326 | TableMetadata getTableMetadata(String tableName) { |
| 327 | return tableMetadata.get(tableName); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | long nextVersion() { |
| 331 | return versionCounter++; |
| 332 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 333 | |
| 334 | Set<String> getTableNames() { |
| 335 | return ImmutableSet.copyOf(tableMetadata.keySet()); |
| 336 | } |
| 337 | |
| 338 | |
| 339 | boolean removeTable(String tableName) { |
| 340 | if (!tableMetadata.containsKey(tableName)) { |
| 341 | return false; |
| 342 | } |
| 343 | tableMetadata.remove(tableName); |
| 344 | tableData.remove(tableName); |
| 345 | return true; |
| 346 | } |
| 347 | |
| 348 | void removeAllTables() { |
| 349 | tableMetadata.clear(); |
| 350 | tableData.clear(); |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | public static class TableMetadata { |
| 355 | private final String tableName; |
| 356 | private final boolean expireOldEntries; |
| 357 | private final int ttlMillis; |
| 358 | |
| 359 | public TableMetadata(String tableName) { |
| 360 | this.tableName = tableName; |
| 361 | this.expireOldEntries = false; |
| 362 | this.ttlMillis = Integer.MAX_VALUE; |
| 363 | |
| 364 | } |
| 365 | |
| 366 | public TableMetadata(String tableName, int ttlMillis) { |
| 367 | this.tableName = tableName; |
| 368 | this.expireOldEntries = true; |
| 369 | this.ttlMillis = ttlMillis; |
| 370 | } |
| 371 | |
| 372 | public String tableName() { |
| 373 | return tableName; |
| 374 | } |
| 375 | |
| 376 | public boolean expireOldEntries() { |
| 377 | return expireOldEntries; |
| 378 | } |
| 379 | |
| 380 | public int ttlMillis() { |
| 381 | return ttlMillis; |
| 382 | } |
Madan Jampani | f5d263b | 2014-11-13 10:04:40 -0800 | [diff] [blame] | 383 | |
| 384 | @Override |
| 385 | public String toString() { |
| 386 | return MoreObjects.toStringHelper(getClass()) |
| 387 | .add("tableName", tableName) |
| 388 | .add("expireOldEntries", expireOldEntries) |
| 389 | .add("ttlMillis", ttlMillis) |
| 390 | .toString(); |
| 391 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | @Override |
| 395 | public byte[] takeSnapshot() { |
| 396 | try { |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 397 | if (compressSnapshot) { |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 398 | byte[] input = DB_SERIALIZER.encode(state); |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 399 | ByteArrayOutputStream comp = new ByteArrayOutputStream(input.length); |
| 400 | DeflaterOutputStream compressor = new DeflaterOutputStream(comp); |
| 401 | compressor.write(input, 0, input.length); |
| 402 | compressor.close(); |
| 403 | return comp.toByteArray(); |
| 404 | } else { |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 405 | return DB_SERIALIZER.encode(state); |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 406 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 407 | } catch (Exception e) { |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 408 | log.error("Failed to take snapshot", e); |
| 409 | throw new SnapshotException(e); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 410 | } |
| 411 | } |
| 412 | |
| 413 | @Override |
| 414 | public void installSnapshot(byte[] data) { |
| 415 | try { |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 416 | if (compressSnapshot) { |
| 417 | ByteArrayInputStream in = new ByteArrayInputStream(data); |
| 418 | InflaterInputStream decompressor = new InflaterInputStream(in); |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 419 | this.state = DB_SERIALIZER.decode(decompressor); |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 420 | } else { |
Yuta HIGUCHI | 91768e3 | 2014-11-22 05:06:35 -0800 | [diff] [blame] | 421 | this.state = DB_SERIALIZER.decode(data); |
Yuta HIGUCHI | a7680a3 | 2014-11-06 22:17:37 -0800 | [diff] [blame] | 422 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 423 | |
Madan Jampani | a88d1f5 | 2014-11-14 16:45:24 -0800 | [diff] [blame] | 424 | updatesExecutor.submit(new Runnable() { |
| 425 | @Override |
| 426 | public void run() { |
| 427 | for (DatabaseUpdateEventListener listener : listeners) { |
| 428 | listener.snapshotInstalled(state); |
| 429 | } |
| 430 | } |
| 431 | }); |
| 432 | |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 433 | } catch (Exception e) { |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 434 | log.error("Failed to install from snapshot", e); |
| 435 | throw new SnapshotException(e); |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 436 | } |
| 437 | } |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 438 | |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 439 | /** |
| 440 | * Adds specified DatabaseUpdateEventListener. |
| 441 | * @param listener listener to add |
| 442 | */ |
Madan Jampani | 12390c1 | 2014-11-12 00:35:56 -0800 | [diff] [blame] | 443 | public void addEventListener(DatabaseUpdateEventListener listener) { |
| 444 | listeners.add(listener); |
| 445 | } |
Madan Jampani | def2c65 | 2014-11-12 13:50:10 -0800 | [diff] [blame] | 446 | |
| 447 | /** |
| 448 | * Removes specified DatabaseUpdateEventListener. |
| 449 | * @param listener listener to remove |
| 450 | */ |
| 451 | public void removeEventListener(DatabaseUpdateEventListener listener) { |
| 452 | listeners.remove(listener); |
| 453 | } |
Madan Jampani | 08822c4 | 2014-11-04 17:17:46 -0800 | [diff] [blame] | 454 | } |