opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DatastoreContext.java

   1 /*
   2  * Copyright (c) 2014 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.cluster.datastore;
  10
  11 import akka.util.Timeout;
  12 import com.google.common.annotations.VisibleForTesting;
  13 import com.google.common.base.Preconditions;
  14 import com.google.common.collect.Sets;
  15 import java.util.Set;
  16 import java.util.concurrent.TimeUnit;
  17 import org.apache.commons.lang3.text.WordUtils;
  18 import org.opendaylight.controller.cluster.common.actor.AkkaConfigurationReader;
  19 import org.opendaylight.controller.cluster.common.actor.FileAkkaConfigurationReader;
  20 import org.opendaylight.controller.cluster.raft.ConfigParams;
  21 import org.opendaylight.controller.cluster.raft.DefaultConfigParamsImpl;
  22 import org.opendaylight.controller.cluster.raft.PeerAddressResolver;
  23 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  24 import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStoreConfigProperties;
  25 import scala.concurrent.duration.Duration;
  26 import scala.concurrent.duration.FiniteDuration;
  27
  28 /**
  29  * Contains contextual data for a data store.
  30  *
  31  * @author Thomas Pantelis
  32  */
  33 public class DatastoreContext {
  34     public static final String METRICS_DOMAIN = "org.opendaylight.controller.cluster.datastore";
  35
  36     public static final Duration DEFAULT_SHARD_TRANSACTION_IDLE_TIMEOUT = Duration.create(10, TimeUnit.MINUTES);
  37     public static final int DEFAULT_OPERATION_TIMEOUT_IN_MS = 5000;
  38     public static final int DEFAULT_SHARD_TX_COMMIT_TIMEOUT_IN_SECONDS = 30;
  39     public static final int DEFAULT_JOURNAL_RECOVERY_BATCH_SIZE = 1000;
  40     public static final int DEFAULT_SNAPSHOT_BATCH_COUNT = 20000;
  41     public static final int DEFAULT_HEARTBEAT_INTERVAL_IN_MILLIS = 500;
  42     public static final int DEFAULT_ISOLATED_LEADER_CHECK_INTERVAL_IN_MILLIS = DEFAULT_HEARTBEAT_INTERVAL_IN_MILLIS * 10;
  43     public static final int DEFAULT_SHARD_TX_COMMIT_QUEUE_CAPACITY = 50000;
  44     public static final Timeout DEFAULT_SHARD_INITIALIZATION_TIMEOUT = new Timeout(5, TimeUnit.MINUTES);
  45     public static final Timeout DEFAULT_SHARD_LEADER_ELECTION_TIMEOUT = new Timeout(30, TimeUnit.SECONDS);
  46     public static final boolean DEFAULT_PERSISTENT = true;
  47     public static final FileAkkaConfigurationReader DEFAULT_CONFIGURATION_READER = new FileAkkaConfigurationReader();
  48     public static final int DEFAULT_SHARD_SNAPSHOT_DATA_THRESHOLD_PERCENTAGE = 12;
  49     public static final int DEFAULT_SHARD_ELECTION_TIMEOUT_FACTOR = 2;
  50     public static final int DEFAULT_TX_CREATION_INITIAL_RATE_LIMIT = 100;
  51     public static final String UNKNOWN_DATA_STORE_TYPE = "unknown";
  52     public static final int DEFAULT_SHARD_BATCHED_MODIFICATION_COUNT = 1000;
  53     public static final long DEFAULT_SHARD_COMMIT_QUEUE_EXPIRY_TIMEOUT_IN_MS = TimeUnit.MILLISECONDS.convert(2, TimeUnit.MINUTES);
  54     public static final int DEFAULT_SHARD_SNAPSHOT_CHUNK_SIZE = 2048000;
  55
  56     private static final Set<String> globalDatastoreNames = Sets.newConcurrentHashSet();
  57
  58     private InMemoryDOMDataStoreConfigProperties dataStoreProperties;
  59     private Duration shardTransactionIdleTimeout = DatastoreContext.DEFAULT_SHARD_TRANSACTION_IDLE_TIMEOUT;
  60     private long operationTimeoutInMillis = DEFAULT_OPERATION_TIMEOUT_IN_MS;
  61     private String dataStoreMXBeanType;
  62     private int shardTransactionCommitTimeoutInSeconds = DEFAULT_SHARD_TX_COMMIT_TIMEOUT_IN_SECONDS;
  63     private int shardTransactionCommitQueueCapacity = DEFAULT_SHARD_TX_COMMIT_QUEUE_CAPACITY;
  64     private Timeout shardInitializationTimeout = DEFAULT_SHARD_INITIALIZATION_TIMEOUT;
  65     private Timeout shardLeaderElectionTimeout = DEFAULT_SHARD_LEADER_ELECTION_TIMEOUT;
  66     private boolean persistent = DEFAULT_PERSISTENT;
  67     private AkkaConfigurationReader configurationReader = DEFAULT_CONFIGURATION_READER;
  68     private long transactionCreationInitialRateLimit = DEFAULT_TX_CREATION_INITIAL_RATE_LIMIT;
  69     private final DefaultConfigParamsImpl raftConfig = new DefaultConfigParamsImpl();
  70     private String dataStoreName = UNKNOWN_DATA_STORE_TYPE;
  71     private LogicalDatastoreType logicalStoreType = LogicalDatastoreType.OPERATIONAL;
  72     private int shardBatchedModificationCount = DEFAULT_SHARD_BATCHED_MODIFICATION_COUNT;
  73     private boolean writeOnlyTransactionOptimizationsEnabled = true;
  74     private long shardCommitQueueExpiryTimeoutInMillis = DEFAULT_SHARD_COMMIT_QUEUE_EXPIRY_TIMEOUT_IN_MS;
  75     private boolean transactionDebugContextEnabled = false;
  76     private String shardManagerPersistenceId;
  77
  78     public static Set<String> getGlobalDatastoreNames() {
  79         return globalDatastoreNames;
  80     }
  81
  82     private DatastoreContext() {
  83         setShardJournalRecoveryLogBatchSize(DEFAULT_JOURNAL_RECOVERY_BATCH_SIZE);
  84         setSnapshotBatchCount(DEFAULT_SNAPSHOT_BATCH_COUNT);
  85         setHeartbeatInterval(DEFAULT_HEARTBEAT_INTERVAL_IN_MILLIS);
  86         setIsolatedLeaderCheckInterval(DEFAULT_ISOLATED_LEADER_CHECK_INTERVAL_IN_MILLIS);
  87         setSnapshotDataThresholdPercentage(DEFAULT_SHARD_SNAPSHOT_DATA_THRESHOLD_PERCENTAGE);
  88         setElectionTimeoutFactor(DEFAULT_SHARD_ELECTION_TIMEOUT_FACTOR);
  89         setShardSnapshotChunkSize(DEFAULT_SHARD_SNAPSHOT_CHUNK_SIZE);
  90     }
  91
  92     private DatastoreContext(DatastoreContext other) {
  93         this.dataStoreProperties = other.dataStoreProperties;
  94         this.shardTransactionIdleTimeout = other.shardTransactionIdleTimeout;
  95         this.operationTimeoutInMillis = other.operationTimeoutInMillis;
  96         this.dataStoreMXBeanType = other.dataStoreMXBeanType;
  97         this.shardTransactionCommitTimeoutInSeconds = other.shardTransactionCommitTimeoutInSeconds;
  98         this.shardTransactionCommitQueueCapacity = other.shardTransactionCommitQueueCapacity;
  99         this.shardInitializationTimeout = other.shardInitializationTimeout;
 100         this.shardLeaderElectionTimeout = other.shardLeaderElectionTimeout;
 101         this.persistent = other.persistent;
 102         this.configurationReader = other.configurationReader;
 103         this.transactionCreationInitialRateLimit = other.transactionCreationInitialRateLimit;
 104         this.dataStoreName = other.dataStoreName;
 105         this.logicalStoreType = other.logicalStoreType;
 106         this.shardBatchedModificationCount = other.shardBatchedModificationCount;
 107         this.writeOnlyTransactionOptimizationsEnabled = other.writeOnlyTransactionOptimizationsEnabled;
 108         this.shardCommitQueueExpiryTimeoutInMillis = other.shardCommitQueueExpiryTimeoutInMillis;
 109         this.transactionDebugContextEnabled = other.transactionDebugContextEnabled;
 110         this.shardManagerPersistenceId = other.shardManagerPersistenceId;
 111
 112         setShardJournalRecoveryLogBatchSize(other.raftConfig.getJournalRecoveryLogBatchSize());
 113         setSnapshotBatchCount(other.raftConfig.getSnapshotBatchCount());
 114         setHeartbeatInterval(other.raftConfig.getHeartBeatInterval().toMillis());
 115         setIsolatedLeaderCheckInterval(other.raftConfig.getIsolatedCheckIntervalInMillis());
 116         setSnapshotDataThresholdPercentage(other.raftConfig.getSnapshotDataThresholdPercentage());
 117         setElectionTimeoutFactor(other.raftConfig.getElectionTimeoutFactor());
 118         setCustomRaftPolicyImplementation(other.raftConfig.getCustomRaftPolicyImplementationClass());
 119         setShardSnapshotChunkSize(other.raftConfig.getSnapshotChunkSize());
 120         setPeerAddressResolver(other.raftConfig.getPeerAddressResolver());
 121     }
 122
 123     public static Builder newBuilder() {
 124         return new Builder(new DatastoreContext());
 125     }
 126
 127     public static Builder newBuilderFrom(DatastoreContext context) {
 128         return new Builder(new DatastoreContext(context));
 129     }
 130
 131     public InMemoryDOMDataStoreConfigProperties getDataStoreProperties() {
 132         return dataStoreProperties;
 133     }
 134
 135     public Duration getShardTransactionIdleTimeout() {
 136         return shardTransactionIdleTimeout;
 137     }
 138
 139     public String getDataStoreMXBeanType() {
 140         return dataStoreMXBeanType;
 141     }
 142
 143     public long getOperationTimeoutInMillis() {
 144         return operationTimeoutInMillis;
 145     }
 146
 147     public ConfigParams getShardRaftConfig() {
 148         return raftConfig;
 149     }
 150
 151     public int getShardTransactionCommitTimeoutInSeconds() {
 152         return shardTransactionCommitTimeoutInSeconds;
 153     }
 154
 155     public int getShardTransactionCommitQueueCapacity() {
 156         return shardTransactionCommitQueueCapacity;
 157     }
 158
 159     public Timeout getShardInitializationTimeout() {
 160         return shardInitializationTimeout;
 161     }
 162
 163     public Timeout getShardLeaderElectionTimeout() {
 164         return shardLeaderElectionTimeout;
 165     }
 166
 167     public boolean isPersistent() {
 168         return persistent;
 169     }
 170
 171     public AkkaConfigurationReader getConfigurationReader() {
 172         return configurationReader;
 173     }
 174
 175     public long getShardElectionTimeoutFactor(){
 176         return raftConfig.getElectionTimeoutFactor();
 177     }
 178
 179     public String getDataStoreName(){
 180         return dataStoreName;
 181     }
 182
 183     public LogicalDatastoreType getLogicalStoreType() {
 184         return logicalStoreType;
 185     }
 186
 187     public long getTransactionCreationInitialRateLimit() {
 188         return transactionCreationInitialRateLimit;
 189     }
 190
 191     public String getShardManagerPersistenceId() {
 192         return shardManagerPersistenceId;
 193     }
 194
 195     private void setPeerAddressResolver(PeerAddressResolver resolver) {
 196         raftConfig.setPeerAddressResolver(resolver);
 197     }
 198
 199     private void setHeartbeatInterval(long shardHeartbeatIntervalInMillis){
 200         raftConfig.setHeartBeatInterval(new FiniteDuration(shardHeartbeatIntervalInMillis,
 201                 TimeUnit.MILLISECONDS));
 202     }
 203
 204     private void setShardJournalRecoveryLogBatchSize(int shardJournalRecoveryLogBatchSize){
 205         raftConfig.setJournalRecoveryLogBatchSize(shardJournalRecoveryLogBatchSize);
 206     }
 207
 208
 209     private void setIsolatedLeaderCheckInterval(long shardIsolatedLeaderCheckIntervalInMillis) {
 210         raftConfig.setIsolatedLeaderCheckInterval(
 211                 new FiniteDuration(shardIsolatedLeaderCheckIntervalInMillis, TimeUnit.MILLISECONDS));
 212     }
 213
 214     private void setElectionTimeoutFactor(long shardElectionTimeoutFactor) {
 215         raftConfig.setElectionTimeoutFactor(shardElectionTimeoutFactor);
 216     }
 217
 218     private void setCustomRaftPolicyImplementation(String customRaftPolicyImplementation) {
 219         raftConfig.setCustomRaftPolicyImplementationClass(customRaftPolicyImplementation);
 220     }
 221
 222     private void setSnapshotDataThresholdPercentage(int shardSnapshotDataThresholdPercentage) {
 223         raftConfig.setSnapshotDataThresholdPercentage(shardSnapshotDataThresholdPercentage);
 224     }
 225
 226     private void setSnapshotBatchCount(long shardSnapshotBatchCount) {
 227         raftConfig.setSnapshotBatchCount(shardSnapshotBatchCount);
 228     }
 229
 230     private void setShardSnapshotChunkSize(int shardSnapshotChunkSize) {
 231         raftConfig.setSnapshotChunkSize(shardSnapshotChunkSize);
 232     }
 233
 234     public int getShardBatchedModificationCount() {
 235         return shardBatchedModificationCount;
 236     }
 237
 238     public boolean isWriteOnlyTransactionOptimizationsEnabled() {
 239         return writeOnlyTransactionOptimizationsEnabled;
 240     }
 241
 242     public long getShardCommitQueueExpiryTimeoutInMillis() {
 243         return shardCommitQueueExpiryTimeoutInMillis;
 244     }
 245
 246     public boolean isTransactionDebugContextEnabled() {
 247         return transactionDebugContextEnabled;
 248     }
 249
 250     public int getShardSnapshotChunkSize() {
 251         return raftConfig.getSnapshotChunkSize();
 252     }
 253
 254     public static class Builder {
 255         private final DatastoreContext datastoreContext;
 256         private int maxShardDataChangeExecutorPoolSize =
 257                 InMemoryDOMDataStoreConfigProperties.DEFAULT_MAX_DATA_CHANGE_EXECUTOR_POOL_SIZE;
 258         private int maxShardDataChangeExecutorQueueSize =
 259                 InMemoryDOMDataStoreConfigProperties.DEFAULT_MAX_DATA_CHANGE_EXECUTOR_QUEUE_SIZE;
 260         private int maxShardDataChangeListenerQueueSize =
 261                 InMemoryDOMDataStoreConfigProperties.DEFAULT_MAX_DATA_CHANGE_LISTENER_QUEUE_SIZE;
 262         private int maxShardDataStoreExecutorQueueSize =
 263                 InMemoryDOMDataStoreConfigProperties.DEFAULT_MAX_DATA_STORE_EXECUTOR_QUEUE_SIZE;
 264
 265         private Builder(DatastoreContext datastoreContext) {
 266             this.datastoreContext = datastoreContext;
 267
 268             if(datastoreContext.getDataStoreProperties() != null) {
 269                 maxShardDataChangeExecutorPoolSize =
 270                         datastoreContext.getDataStoreProperties().getMaxDataChangeExecutorPoolSize();
 271                 maxShardDataChangeExecutorQueueSize =
 272                         datastoreContext.getDataStoreProperties().getMaxDataChangeExecutorQueueSize();
 273                 maxShardDataChangeListenerQueueSize =
 274                         datastoreContext.getDataStoreProperties().getMaxDataChangeListenerQueueSize();
 275                 maxShardDataStoreExecutorQueueSize =
 276                         datastoreContext.getDataStoreProperties().getMaxDataStoreExecutorQueueSize();
 277             }
 278         }
 279
 280         public Builder boundedMailboxCapacity(int boundedMailboxCapacity) {
 281             // TODO - this is defined in the yang DataStoreProperties but not currently used.
 282             return this;
 283         }
 284
 285         public Builder enableMetricCapture(boolean enableMetricCapture) {
 286             // TODO - this is defined in the yang DataStoreProperties but not currently used.
 287             return this;
 288         }
 289
 290
 291         public Builder shardTransactionIdleTimeout(long timeout, TimeUnit unit) {
 292             datastoreContext.shardTransactionIdleTimeout = Duration.create(timeout, unit);
 293             return this;
 294         }
 295
 296         public Builder shardTransactionIdleTimeoutInMinutes(long timeout) {
 297             return shardTransactionIdleTimeout(timeout, TimeUnit.MINUTES);
 298         }
 299
 300         public Builder operationTimeoutInSeconds(int operationTimeoutInSeconds) {
 301             datastoreContext.operationTimeoutInMillis = TimeUnit.SECONDS.toMillis(operationTimeoutInSeconds);
 302             return this;
 303         }
 304
 305         public Builder operationTimeoutInMillis(long operationTimeoutInMillis) {
 306             datastoreContext.operationTimeoutInMillis = operationTimeoutInMillis;
 307             return this;
 308         }
 309
 310         public Builder dataStoreMXBeanType(String dataStoreMXBeanType) {
 311             datastoreContext.dataStoreMXBeanType = dataStoreMXBeanType;
 312             return this;
 313         }
 314
 315         public Builder shardTransactionCommitTimeoutInSeconds(int shardTransactionCommitTimeoutInSeconds) {
 316             datastoreContext.shardTransactionCommitTimeoutInSeconds = shardTransactionCommitTimeoutInSeconds;
 317             return this;
 318         }
 319
 320         public Builder shardJournalRecoveryLogBatchSize(int shardJournalRecoveryLogBatchSize) {
 321             datastoreContext.setShardJournalRecoveryLogBatchSize(shardJournalRecoveryLogBatchSize);
 322             return this;
 323         }
 324
 325         public Builder shardSnapshotBatchCount(int shardSnapshotBatchCount) {
 326             datastoreContext.setSnapshotBatchCount(shardSnapshotBatchCount);
 327             return this;
 328         }
 329
 330         public Builder shardSnapshotDataThresholdPercentage(int shardSnapshotDataThresholdPercentage) {
 331             datastoreContext.setSnapshotDataThresholdPercentage(shardSnapshotDataThresholdPercentage);
 332             return this;
 333         }
 334
 335         public Builder shardHeartbeatIntervalInMillis(int shardHeartbeatIntervalInMillis) {
 336             datastoreContext.setHeartbeatInterval(shardHeartbeatIntervalInMillis);
 337             return this;
 338         }
 339
 340         public Builder shardTransactionCommitQueueCapacity(int shardTransactionCommitQueueCapacity) {
 341             datastoreContext.shardTransactionCommitQueueCapacity = shardTransactionCommitQueueCapacity;
 342             return this;
 343         }
 344
 345         public Builder shardInitializationTimeout(long timeout, TimeUnit unit) {
 346             datastoreContext.shardInitializationTimeout = new Timeout(timeout, unit);
 347             return this;
 348         }
 349
 350         public Builder shardInitializationTimeoutInSeconds(long timeout) {
 351             return shardInitializationTimeout(timeout, TimeUnit.SECONDS);
 352         }
 353
 354         public Builder shardLeaderElectionTimeout(long timeout, TimeUnit unit) {
 355             datastoreContext.shardLeaderElectionTimeout = new Timeout(timeout, unit);
 356             return this;
 357         }
 358
 359         public Builder shardLeaderElectionTimeoutInSeconds(long timeout) {
 360             return shardLeaderElectionTimeout(timeout, TimeUnit.SECONDS);
 361         }
 362
 363         public Builder configurationReader(AkkaConfigurationReader configurationReader){
 364             datastoreContext.configurationReader = configurationReader;
 365             return this;
 366         }
 367
 368         public Builder persistent(boolean persistent){
 369             datastoreContext.persistent = persistent;
 370             return this;
 371         }
 372
 373         public Builder shardIsolatedLeaderCheckIntervalInMillis(int shardIsolatedLeaderCheckIntervalInMillis) {
 374             datastoreContext.setIsolatedLeaderCheckInterval(shardIsolatedLeaderCheckIntervalInMillis);
 375             return this;
 376         }
 377
 378         public Builder shardElectionTimeoutFactor(long shardElectionTimeoutFactor){
 379             datastoreContext.setElectionTimeoutFactor(shardElectionTimeoutFactor);
 380             return this;
 381         }
 382
 383         public Builder transactionCreationInitialRateLimit(long initialRateLimit){
 384             datastoreContext.transactionCreationInitialRateLimit = initialRateLimit;
 385             return this;
 386         }
 387
 388         public Builder logicalStoreType(LogicalDatastoreType logicalStoreType){
 389             datastoreContext.logicalStoreType = Preconditions.checkNotNull(logicalStoreType);
 390
 391             // Retain compatible naming
 392             switch (logicalStoreType) {
 393             case CONFIGURATION:
 394                 dataStoreName("config");
 395                 break;
 396             case OPERATIONAL:
 397                 dataStoreName("operational");
 398                 break;
 399             default:
 400                 dataStoreName(logicalStoreType.name());
 401             }
 402
 403             return this;
 404         }
 405
 406         public Builder dataStoreName(String dataStoreName){
 407             datastoreContext.dataStoreName = Preconditions.checkNotNull(dataStoreName);
 408             datastoreContext.dataStoreMXBeanType = "Distributed" + WordUtils.capitalize(dataStoreName) + "Datastore";
 409             return this;
 410         }
 411
 412         public Builder shardBatchedModificationCount(int shardBatchedModificationCount) {
 413             datastoreContext.shardBatchedModificationCount = shardBatchedModificationCount;
 414             return this;
 415         }
 416
 417         public Builder writeOnlyTransactionOptimizationsEnabled(boolean value) {
 418             datastoreContext.writeOnlyTransactionOptimizationsEnabled = value;
 419             return this;
 420         }
 421
 422         public Builder shardCommitQueueExpiryTimeoutInMillis(long value) {
 423             datastoreContext.shardCommitQueueExpiryTimeoutInMillis = value;
 424             return this;
 425         }
 426
 427         public Builder shardCommitQueueExpiryTimeoutInSeconds(long value) {
 428             datastoreContext.shardCommitQueueExpiryTimeoutInMillis = TimeUnit.MILLISECONDS.convert(
 429                     value, TimeUnit.SECONDS);
 430             return this;
 431         }
 432
 433         public Builder transactionDebugContextEnabled(boolean value) {
 434             datastoreContext.transactionDebugContextEnabled = value;
 435             return this;
 436         }
 437
 438         public Builder maxShardDataChangeExecutorPoolSize(int maxShardDataChangeExecutorPoolSize) {
 439             this.maxShardDataChangeExecutorPoolSize = maxShardDataChangeExecutorPoolSize;
 440             return this;
 441         }
 442
 443         public Builder maxShardDataChangeExecutorQueueSize(int maxShardDataChangeExecutorQueueSize) {
 444             this.maxShardDataChangeExecutorQueueSize = maxShardDataChangeExecutorQueueSize;
 445             return this;
 446         }
 447
 448         public Builder maxShardDataChangeListenerQueueSize(int maxShardDataChangeListenerQueueSize) {
 449             this.maxShardDataChangeListenerQueueSize = maxShardDataChangeListenerQueueSize;
 450             return this;
 451         }
 452
 453         public Builder maxShardDataStoreExecutorQueueSize(int maxShardDataStoreExecutorQueueSize) {
 454             this.maxShardDataStoreExecutorQueueSize = maxShardDataStoreExecutorQueueSize;
 455             return this;
 456         }
 457
 458         /**
 459          * For unit tests only.
 460          */
 461         @VisibleForTesting
 462         public Builder shardManagerPersistenceId(String id) {
 463             datastoreContext.shardManagerPersistenceId = id;
 464             return this;
 465         }
 466
 467         public DatastoreContext build() {
 468             datastoreContext.dataStoreProperties = InMemoryDOMDataStoreConfigProperties.create(
 469                     maxShardDataChangeExecutorPoolSize, maxShardDataChangeExecutorQueueSize,
 470                     maxShardDataChangeListenerQueueSize, maxShardDataStoreExecutorQueueSize);
 471
 472             if(datastoreContext.dataStoreName != null) {
 473                 globalDatastoreNames.add(datastoreContext.dataStoreName);
 474             }
 475
 476             return datastoreContext;
 477         }
 478
 479         public Builder customRaftPolicyImplementation(String customRaftPolicyImplementation) {
 480             datastoreContext.setCustomRaftPolicyImplementation(customRaftPolicyImplementation);
 481             return this;
 482         }
 483
 484         public Builder shardSnapshotChunkSize(int shardSnapshotChunkSize) {
 485             datastoreContext.setShardSnapshotChunkSize(shardSnapshotChunkSize);
 486             return this;
 487         }
 488
 489         public Builder shardPeerAddressResolver(PeerAddressResolver resolver) {
 490             datastoreContext.setPeerAddressResolver(resolver);
 491             return this;
 492         }
 493     }
 494 }