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

   1 /*
   2  * Copyright (c) 2014 Cisco 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 package org.opendaylight.controller.cluster.datastore;
   9
  10 import static com.google.common.base.Preconditions.checkArgument;
  11 import static java.util.Objects.requireNonNull;
  12
  13 import akka.actor.ActorRef;
  14 import akka.actor.ActorSystem;
  15 import akka.actor.PoisonPill;
  16 import akka.actor.Props;
  17 import com.google.common.annotations.Beta;
  18 import com.google.common.annotations.VisibleForTesting;
  19 import com.google.common.base.Throwables;
  20 import com.google.common.util.concurrent.Uninterruptibles;
  21 import java.util.Set;
  22 import java.util.concurrent.CountDownLatch;
  23 import java.util.concurrent.TimeUnit;
  24 import java.util.concurrent.TimeoutException;
  25 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
  26 import org.opendaylight.controller.cluster.common.actor.Dispatchers;
  27 import org.opendaylight.controller.cluster.databroker.actors.dds.DataStoreClient;
  28 import org.opendaylight.controller.cluster.databroker.actors.dds.DistributedDataStoreClientActor;
  29 import org.opendaylight.controller.cluster.datastore.config.Configuration;
  30 import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
  31 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.DatastoreConfigurationMXBeanImpl;
  32 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.DatastoreInfoMXBeanImpl;
  33 import org.opendaylight.controller.cluster.datastore.persisted.DatastoreSnapshot;
  34 import org.opendaylight.controller.cluster.datastore.shardmanager.AbstractShardManagerCreator;
  35 import org.opendaylight.controller.cluster.datastore.shardmanager.ShardManagerCreator;
  36 import org.opendaylight.controller.cluster.datastore.utils.ActorUtils;
  37 import org.opendaylight.controller.cluster.datastore.utils.ClusterUtils;
  38 import org.opendaylight.controller.cluster.datastore.utils.PrimaryShardInfoFutureCache;
  39 import org.opendaylight.mdsal.dom.api.ClusteredDOMDataTreeChangeListener;
  40 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
  41 import org.opendaylight.mdsal.dom.api.DOMDataTreeCommitCohort;
  42 import org.opendaylight.mdsal.dom.api.DOMDataTreeCommitCohortRegistration;
  43 import org.opendaylight.mdsal.dom.api.DOMDataTreeCommitCohortRegistry;
  44 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  45 import org.opendaylight.mdsal.dom.spi.store.DOMStoreTreeChangePublisher;
  46 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  47 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  48 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  49 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContextListener;
  50 import org.slf4j.Logger;
  51 import org.slf4j.LoggerFactory;
  52 import scala.concurrent.duration.Duration;
  53
  54 /**
  55  * Base implementation of a distributed DOMStore.
  56  */
  57 public abstract class AbstractDataStore implements DistributedDataStoreInterface, EffectiveModelContextListener,
  58         DatastoreContextPropertiesUpdater.Listener, DOMStoreTreeChangePublisher,
  59         DOMDataTreeCommitCohortRegistry, AutoCloseable {
  60
  61     private static final Logger LOG = LoggerFactory.getLogger(AbstractDataStore.class);
  62
  63     private final CountDownLatch waitTillReadyCountDownLatch = new CountDownLatch(1);
  64     private final ClientIdentifier identifier;
  65     private final DataStoreClient client;
  66     private final ActorUtils actorUtils;
  67
  68     private AutoCloseable closeable;
  69     private DatastoreConfigurationMXBeanImpl datastoreConfigMXBean;
  70     private DatastoreInfoMXBeanImpl datastoreInfoMXBean;
  71
  72     @SuppressWarnings("checkstyle:IllegalCatch")
  73     protected AbstractDataStore(final ActorSystem actorSystem, final ClusterWrapper cluster,
  74             final Configuration configuration, final DatastoreContextFactory datastoreContextFactory,
  75             final DatastoreSnapshot restoreFromSnapshot) {
  76         requireNonNull(actorSystem, "actorSystem should not be null");
  77         requireNonNull(cluster, "cluster should not be null");
  78         requireNonNull(configuration, "configuration should not be null");
  79         requireNonNull(datastoreContextFactory, "datastoreContextFactory should not be null");
  80
  81         String shardManagerId = ShardManagerIdentifier.builder()
  82                 .type(datastoreContextFactory.getBaseDatastoreContext().getDataStoreName()).build().toString();
  83
  84         LOG.info("Creating ShardManager : {}", shardManagerId);
  85
  86         String shardDispatcher =
  87                 new Dispatchers(actorSystem.dispatchers()).getDispatcherPath(Dispatchers.DispatcherType.Shard);
  88
  89         PrimaryShardInfoFutureCache primaryShardInfoCache = new PrimaryShardInfoFutureCache();
  90
  91         AbstractShardManagerCreator<?> creator = getShardManagerCreator().cluster(cluster).configuration(configuration)
  92                 .datastoreContextFactory(datastoreContextFactory)
  93                 .waitTillReadyCountDownLatch(waitTillReadyCountDownLatch)
  94                 .primaryShardInfoCache(primaryShardInfoCache)
  95                 .restoreFromSnapshot(restoreFromSnapshot)
  96                 .distributedDataStore(this);
  97
  98         actorUtils = new ActorUtils(actorSystem, createShardManager(actorSystem, creator, shardDispatcher,
  99                 shardManagerId), cluster, configuration, datastoreContextFactory.getBaseDatastoreContext(),
 100                 primaryShardInfoCache);
 101
 102         final Props clientProps = DistributedDataStoreClientActor.props(cluster.getCurrentMemberName(),
 103             datastoreContextFactory.getBaseDatastoreContext().getDataStoreName(), actorUtils);
 104         final ActorRef clientActor = actorSystem.actorOf(clientProps);
 105         try {
 106             client = DistributedDataStoreClientActor.getDistributedDataStoreClient(clientActor, 30, TimeUnit.SECONDS);
 107         } catch (Exception e) {
 108             LOG.error("Failed to get actor for {}", clientProps, e);
 109             clientActor.tell(PoisonPill.getInstance(), ActorRef.noSender());
 110             Throwables.throwIfUnchecked(e);
 111             throw new RuntimeException(e);
 112         }
 113
 114         identifier = client.getIdentifier();
 115         LOG.debug("Distributed data store client {} started", identifier);
 116
 117         datastoreConfigMXBean = new DatastoreConfigurationMXBeanImpl(
 118                 datastoreContextFactory.getBaseDatastoreContext().getDataStoreMXBeanType());
 119         datastoreConfigMXBean.setContext(datastoreContextFactory.getBaseDatastoreContext());
 120         datastoreConfigMXBean.registerMBean();
 121
 122         datastoreInfoMXBean = new DatastoreInfoMXBeanImpl(datastoreContextFactory.getBaseDatastoreContext()
 123                 .getDataStoreMXBeanType(), actorUtils);
 124         datastoreInfoMXBean.registerMBean();
 125     }
 126
 127     @VisibleForTesting
 128     protected AbstractDataStore(final ActorUtils actorUtils, final ClientIdentifier identifier) {
 129         this.actorUtils = requireNonNull(actorUtils, "actorContext should not be null");
 130         this.client = null;
 131         this.identifier = requireNonNull(identifier);
 132     }
 133
 134     @VisibleForTesting
 135     protected AbstractDataStore(final ActorUtils actorUtils, final ClientIdentifier identifier,
 136                                 final DataStoreClient clientActor) {
 137         this.actorUtils = requireNonNull(actorUtils, "actorContext should not be null");
 138         this.client = clientActor;
 139         this.identifier = requireNonNull(identifier);
 140     }
 141
 142     protected AbstractShardManagerCreator<?> getShardManagerCreator() {
 143         return new ShardManagerCreator();
 144     }
 145
 146     protected final DataStoreClient getClient() {
 147         return client;
 148     }
 149
 150     final ClientIdentifier getIdentifier() {
 151         return identifier;
 152     }
 153
 154     public void setCloseable(final AutoCloseable closeable) {
 155         this.closeable = closeable;
 156     }
 157
 158     @Override
 159     public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerTreeChangeListener(
 160             final YangInstanceIdentifier treeId, final L listener) {
 161         requireNonNull(treeId, "treeId should not be null");
 162         requireNonNull(listener, "listener should not be null");
 163
 164         /*
 165          * We need to potentially deal with multi-shard composition for registration targeting the root of the data
 166          * store. If that is the case, we delegate to a more complicated setup invol
 167          */
 168         if (treeId.isEmpty()) {
 169             // User is targeting root of the datastore. If there is more than one shard, we have to register with them
 170             // all and perform data composition.
 171             final Set<String> shardNames = actorUtils.getConfiguration().getAllShardNames();
 172             if (shardNames.size() > 1) {
 173                 checkArgument(listener instanceof ClusteredDOMDataTreeChangeListener,
 174                     "Cannot listen on root without non-clustered listener %s", listener);
 175                 return new RootDataTreeChangeListenerProxy<>(actorUtils, listener, shardNames);
 176             }
 177         }
 178
 179         final String shardName = actorUtils.getShardStrategyFactory().getStrategy(treeId).findShard(treeId);
 180         LOG.debug("Registering tree listener: {} for tree: {} shard: {}", listener, treeId, shardName);
 181
 182         final DataTreeChangeListenerProxy<L> listenerRegistrationProxy =
 183                 new DataTreeChangeListenerProxy<>(actorUtils, listener, treeId);
 184         listenerRegistrationProxy.init(shardName);
 185
 186         return listenerRegistrationProxy;
 187     }
 188
 189     @Override
 190     public <C extends DOMDataTreeCommitCohort> DOMDataTreeCommitCohortRegistration<C> registerCommitCohort(
 191             final DOMDataTreeIdentifier subtree, final C cohort) {
 192         YangInstanceIdentifier treeId = requireNonNull(subtree, "subtree should not be null").getRootIdentifier();
 193         requireNonNull(cohort, "listener should not be null");
 194
 195
 196         final String shardName = actorUtils.getShardStrategyFactory().getStrategy(treeId).findShard(treeId);
 197         LOG.debug("Registering cohort: {} for tree: {} shard: {}", cohort, treeId, shardName);
 198
 199         DataTreeCohortRegistrationProxy<C> cohortProxy =
 200                 new DataTreeCohortRegistrationProxy<>(actorUtils, subtree, cohort);
 201         cohortProxy.init(shardName);
 202         return cohortProxy;
 203     }
 204
 205     @Override
 206     public void onModelContextUpdated(final EffectiveModelContext newModelContext) {
 207         actorUtils.setSchemaContext(newModelContext);
 208     }
 209
 210     @Override
 211     public void onDatastoreContextUpdated(final DatastoreContextFactory contextFactory) {
 212         LOG.info("DatastoreContext updated for data store {}", actorUtils.getDataStoreName());
 213
 214         actorUtils.setDatastoreContext(contextFactory);
 215         datastoreConfigMXBean.setContext(contextFactory.getBaseDatastoreContext());
 216     }
 217
 218     @Override
 219     @SuppressWarnings("checkstyle:IllegalCatch")
 220     public void close() {
 221         LOG.info("Closing data store {}", identifier);
 222
 223         if (datastoreConfigMXBean != null) {
 224             datastoreConfigMXBean.unregisterMBean();
 225         }
 226         if (datastoreInfoMXBean != null) {
 227             datastoreInfoMXBean.unregisterMBean();
 228         }
 229
 230         if (closeable != null) {
 231             try {
 232                 closeable.close();
 233             } catch (Exception e) {
 234                 LOG.debug("Error closing instance", e);
 235             }
 236         }
 237
 238         actorUtils.shutdown();
 239
 240         if (client != null) {
 241             client.close();
 242         }
 243     }
 244
 245     @Override
 246     public ActorUtils getActorUtils() {
 247         return actorUtils;
 248     }
 249
 250     // TODO: consider removing this in favor of awaitReadiness()
 251     public void waitTillReady() {
 252         LOG.info("Beginning to wait for data store to become ready : {}", identifier);
 253
 254         final Duration toWait = initialSettleTime();
 255         try {
 256             if (!awaitReadiness(toWait)) {
 257                 LOG.error("Shard leaders failed to settle in {}, giving up", toWait);
 258                 return;
 259             }
 260         } catch (InterruptedException e) {
 261             LOG.error("Interrupted while waiting for shards to settle", e);
 262             return;
 263         }
 264
 265         LOG.debug("Data store {} is now ready", identifier);
 266     }
 267
 268     @Beta
 269     public boolean awaitReadiness() throws InterruptedException {
 270         return awaitReadiness(initialSettleTime());
 271     }
 272
 273     @Beta
 274     public boolean awaitReadiness(final Duration toWait) throws InterruptedException {
 275         if (toWait.isFinite()) {
 276             return waitTillReadyCountDownLatch.await(toWait.toNanos(), TimeUnit.NANOSECONDS);
 277         }
 278
 279         waitTillReadyCountDownLatch.await();
 280         return true;
 281     }
 282
 283     @Beta
 284     public void awaitReadiness(final long timeout, final TimeUnit unit) throws InterruptedException, TimeoutException {
 285         if (!waitTillReadyCountDownLatch.await(timeout, unit)) {
 286             throw new TimeoutException("Shard leaders failed to settle");
 287         }
 288     }
 289
 290     @SuppressWarnings("checkstyle:IllegalCatch")
 291     private static ActorRef createShardManager(final ActorSystem actorSystem,
 292             final AbstractShardManagerCreator<?> creator, final String shardDispatcher,
 293             final String shardManagerId) {
 294         Exception lastException = null;
 295
 296         for (int i = 0; i < 100; i++) {
 297             try {
 298                 return actorSystem.actorOf(creator.props().withDispatcher(shardDispatcher), shardManagerId);
 299             } catch (Exception e) {
 300                 lastException = e;
 301                 Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
 302                 LOG.debug("Could not create actor {} because of {} - waiting for sometime before retrying "
 303                         + "(retry count = {})", shardManagerId, e.getMessage(), i);
 304             }
 305         }
 306
 307         throw new IllegalStateException("Failed to create Shard Manager", lastException);
 308     }
 309
 310     @VisibleForTesting
 311     public CountDownLatch getWaitTillReadyCountDownLatch() {
 312         return waitTillReadyCountDownLatch;
 313     }
 314
 315     @Override
 316     @SuppressWarnings("unchecked")
 317     public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerProxyListener(
 318             final YangInstanceIdentifier shardLookup, final YangInstanceIdentifier insideShard,
 319             final DOMDataTreeChangeListener delegate) {
 320
 321         requireNonNull(shardLookup, "shardLookup should not be null");
 322         requireNonNull(insideShard, "insideShard should not be null");
 323         requireNonNull(delegate, "delegate should not be null");
 324
 325         final String shardName = actorUtils.getShardStrategyFactory().getStrategy(shardLookup).findShard(shardLookup);
 326         LOG.debug("Registering tree listener: {} for tree: {} shard: {}, path inside shard: {}",
 327                 delegate,shardLookup, shardName, insideShard);
 328
 329         final DataTreeChangeListenerProxy<DOMDataTreeChangeListener> listenerRegistrationProxy =
 330                 new DataTreeChangeListenerProxy<>(actorUtils,
 331                         // wrap this in the ClusteredDOMDataTreeChangeLister interface
 332                         // since we always want clustered registration
 333                         (ClusteredDOMDataTreeChangeListener) delegate::onDataTreeChanged, insideShard);
 334         listenerRegistrationProxy.init(shardName);
 335
 336         return (ListenerRegistration<L>) listenerRegistrationProxy;
 337     }
 338
 339     @Override
 340     @SuppressWarnings("unchecked")
 341     public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerShardConfigListener(
 342             final YangInstanceIdentifier internalPath, final DOMDataTreeChangeListener delegate) {
 343         requireNonNull(delegate, "delegate should not be null");
 344
 345         LOG.debug("Registering a listener for the configuration shard: {}", internalPath);
 346
 347         final DataTreeChangeListenerProxy<DOMDataTreeChangeListener> proxy =
 348                 new DataTreeChangeListenerProxy<>(actorUtils, delegate, internalPath);
 349         proxy.init(ClusterUtils.PREFIX_CONFIG_SHARD_ID);
 350
 351         return (ListenerRegistration<L>) proxy;
 352     }
 353
 354     private Duration initialSettleTime() {
 355         final DatastoreContext context = actorUtils.getDatastoreContext();
 356         final int multiplier = context.getInitialSettleTimeoutMultiplier();
 357         return multiplier == 0 ? Duration.Inf() : context.getShardLeaderElectionTimeout().duration().$times(multiplier);
 358     }
 359 }