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
   9 package org.opendaylight.controller.cluster.datastore;
  10
  11 import akka.actor.ActorRef;
  12 import akka.actor.ActorSystem;
  13 import akka.actor.PoisonPill;
  14 import akka.actor.Props;
  15 import com.google.common.annotations.VisibleForTesting;
  16 import com.google.common.base.Preconditions;
  17 import com.google.common.base.Throwables;
  18 import com.google.common.util.concurrent.Uninterruptibles;
  19 import java.util.concurrent.CountDownLatch;
  20 import java.util.concurrent.TimeUnit;
  21 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
  22 import org.opendaylight.controller.cluster.common.actor.Dispatchers;
  23 import org.opendaylight.controller.cluster.databroker.actors.dds.DataStoreClient;
  24 import org.opendaylight.controller.cluster.databroker.actors.dds.DistributedDataStoreClientActor;
  25 import org.opendaylight.controller.cluster.datastore.config.Configuration;
  26 import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
  27 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.DatastoreConfigurationMXBeanImpl;
  28 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.DatastoreInfoMXBeanImpl;
  29 import org.opendaylight.controller.cluster.datastore.persisted.DatastoreSnapshot;
  30 import org.opendaylight.controller.cluster.datastore.shardmanager.ShardManagerCreator;
  31 import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
  32 import org.opendaylight.controller.cluster.datastore.utils.ClusterUtils;
  33 import org.opendaylight.controller.cluster.datastore.utils.PrimaryShardInfoFutureCache;
  34 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
  35 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  36 import org.opendaylight.controller.md.sal.dom.api.ClusteredDOMDataTreeChangeListener;
  37 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
  38 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTreeChangePublisher;
  39 import org.opendaylight.mdsal.dom.api.DOMDataTreeCommitCohort;
  40 import org.opendaylight.mdsal.dom.api.DOMDataTreeCommitCohortRegistration;
  41 import org.opendaylight.mdsal.dom.api.DOMDataTreeCommitCohortRegistry;
  42 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  43 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  44 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  45 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  46 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  47 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  48 import org.slf4j.Logger;
  49 import org.slf4j.LoggerFactory;
  50
  51 /**
  52  * Base implementation of a distributed DOMStore.
  53  */
  54 public abstract class AbstractDataStore implements DistributedDataStoreInterface, SchemaContextListener,
  55         DatastoreContextConfigAdminOverlay.Listener, DOMStoreTreeChangePublisher,
  56         DOMDataTreeCommitCohortRegistry, AutoCloseable {
  57
  58     private static final Logger LOG = LoggerFactory.getLogger(AbstractDataStore.class);
  59
  60     private static final long READY_WAIT_FACTOR = 3;
  61
  62     private final ActorContext actorContext;
  63     private final long waitTillReadyTimeInMillis;
  64
  65     private AutoCloseable closeable;
  66
  67     private DatastoreConfigurationMXBeanImpl datastoreConfigMXBean;
  68
  69     private DatastoreInfoMXBeanImpl datastoreInfoMXBean;
  70
  71     private final CountDownLatch waitTillReadyCountDownLatch = new CountDownLatch(1);
  72
  73     private final ClientIdentifier identifier;
  74     private final DataStoreClient client;
  75
  76     @SuppressWarnings("checkstyle:IllegalCatch")
  77     protected AbstractDataStore(final ActorSystem actorSystem, final ClusterWrapper cluster,
  78             final Configuration configuration, final DatastoreContextFactory datastoreContextFactory,
  79             final DatastoreSnapshot restoreFromSnapshot) {
  80         Preconditions.checkNotNull(actorSystem, "actorSystem should not be null");
  81         Preconditions.checkNotNull(cluster, "cluster should not be null");
  82         Preconditions.checkNotNull(configuration, "configuration should not be null");
  83         Preconditions.checkNotNull(datastoreContextFactory, "datastoreContextFactory should not be null");
  84
  85         String shardManagerId = ShardManagerIdentifier.builder()
  86                 .type(datastoreContextFactory.getBaseDatastoreContext().getDataStoreName()).build().toString();
  87
  88         LOG.info("Creating ShardManager : {}", shardManagerId);
  89
  90         String shardDispatcher =
  91                 new Dispatchers(actorSystem.dispatchers()).getDispatcherPath(Dispatchers.DispatcherType.Shard);
  92
  93         PrimaryShardInfoFutureCache primaryShardInfoCache = new PrimaryShardInfoFutureCache();
  94
  95         ShardManagerCreator creator = new ShardManagerCreator().cluster(cluster).configuration(configuration)
  96                 .datastoreContextFactory(datastoreContextFactory)
  97                 .waitTillReadyCountDownLatch(waitTillReadyCountDownLatch)
  98                 .primaryShardInfoCache(primaryShardInfoCache)
  99                 .restoreFromSnapshot(restoreFromSnapshot)
 100                 .distributedDataStore(this);
 101
 102         actorContext = new ActorContext(actorSystem, createShardManager(actorSystem, creator, shardDispatcher,
 103                 shardManagerId), cluster, configuration, datastoreContextFactory.getBaseDatastoreContext(),
 104                 primaryShardInfoCache);
 105
 106         final Props clientProps = DistributedDataStoreClientActor.props(cluster.getCurrentMemberName(),
 107             datastoreContextFactory.getBaseDatastoreContext().getDataStoreName(), actorContext);
 108         final ActorRef clientActor = actorSystem.actorOf(clientProps);
 109         try {
 110             client = DistributedDataStoreClientActor.getDistributedDataStoreClient(clientActor, 30, TimeUnit.SECONDS);
 111         } catch (Exception e) {
 112             LOG.error("Failed to get actor for {}", clientProps, e);
 113             clientActor.tell(PoisonPill.getInstance(), ActorRef.noSender());
 114             Throwables.throwIfUnchecked(e);
 115             throw new RuntimeException(e);
 116         }
 117
 118         identifier = client.getIdentifier();
 119         LOG.debug("Distributed data store client {} started", identifier);
 120
 121         this.waitTillReadyTimeInMillis = actorContext.getDatastoreContext().getShardLeaderElectionTimeout()
 122                 .duration().toMillis() * READY_WAIT_FACTOR;
 123
 124         datastoreConfigMXBean = new DatastoreConfigurationMXBeanImpl(
 125                 datastoreContextFactory.getBaseDatastoreContext().getDataStoreMXBeanType());
 126         datastoreConfigMXBean.setContext(datastoreContextFactory.getBaseDatastoreContext());
 127         datastoreConfigMXBean.registerMBean();
 128
 129         datastoreInfoMXBean = new DatastoreInfoMXBeanImpl(datastoreContextFactory.getBaseDatastoreContext()
 130                 .getDataStoreMXBeanType(), actorContext);
 131         datastoreInfoMXBean.registerMBean();
 132     }
 133
 134     @VisibleForTesting
 135     protected AbstractDataStore(final ActorContext actorContext, final ClientIdentifier identifier) {
 136         this.actorContext = Preconditions.checkNotNull(actorContext, "actorContext should not be null");
 137         this.client = null;
 138         this.identifier = Preconditions.checkNotNull(identifier);
 139         this.waitTillReadyTimeInMillis = actorContext.getDatastoreContext().getShardLeaderElectionTimeout()
 140                 .duration().toMillis() * READY_WAIT_FACTOR;
 141     }
 142
 143     @VisibleForTesting
 144     protected AbstractDataStore(final ActorContext actorContext, final ClientIdentifier identifier,
 145                                 final DataStoreClient clientActor) {
 146         this.actorContext = Preconditions.checkNotNull(actorContext, "actorContext should not be null");
 147         this.client = clientActor;
 148         this.identifier = Preconditions.checkNotNull(identifier);
 149         this.waitTillReadyTimeInMillis = actorContext.getDatastoreContext().getShardLeaderElectionTimeout()
 150                 .duration().toMillis() * READY_WAIT_FACTOR;
 151     }
 152
 153     protected final DataStoreClient getClient() {
 154         return client;
 155     }
 156
 157     final ClientIdentifier getIdentifier() {
 158         return identifier;
 159     }
 160
 161     public void setCloseable(final AutoCloseable closeable) {
 162         this.closeable = closeable;
 163     }
 164
 165     @SuppressWarnings("unchecked")
 166     @Override
 167     public <L extends AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
 168                                               ListenerRegistration<L> registerChangeListener(
 169         final YangInstanceIdentifier path, final L listener,
 170         final AsyncDataBroker.DataChangeScope scope) {
 171
 172         Preconditions.checkNotNull(path, "path should not be null");
 173         Preconditions.checkNotNull(listener, "listener should not be null");
 174
 175         LOG.debug("Registering listener: {} for path: {} scope: {}", listener, path, scope);
 176
 177         String shardName = actorContext.getShardStrategyFactory().getStrategy(path).findShard(path);
 178
 179         final DataChangeListenerRegistrationProxy listenerRegistrationProxy =
 180                 new DataChangeListenerRegistrationProxy(shardName, actorContext, listener);
 181         listenerRegistrationProxy.init(path, scope);
 182
 183         return listenerRegistrationProxy;
 184     }
 185
 186     @Override
 187     public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerTreeChangeListener(
 188             final YangInstanceIdentifier treeId, final L listener) {
 189         Preconditions.checkNotNull(treeId, "treeId should not be null");
 190         Preconditions.checkNotNull(listener, "listener should not be null");
 191
 192         final String shardName = actorContext.getShardStrategyFactory().getStrategy(treeId).findShard(treeId);
 193         LOG.debug("Registering tree listener: {} for tree: {} shard: {}", listener, treeId, shardName);
 194
 195         final DataTreeChangeListenerProxy<L> listenerRegistrationProxy =
 196                 new DataTreeChangeListenerProxy<>(actorContext, listener, treeId);
 197         listenerRegistrationProxy.init(shardName);
 198
 199         return listenerRegistrationProxy;
 200     }
 201
 202
 203     @Override
 204     public <C extends DOMDataTreeCommitCohort> DOMDataTreeCommitCohortRegistration<C> registerCommitCohort(
 205             final DOMDataTreeIdentifier subtree, final C cohort) {
 206         YangInstanceIdentifier treeId =
 207                 Preconditions.checkNotNull(subtree, "subtree should not be null").getRootIdentifier();
 208         Preconditions.checkNotNull(cohort, "listener should not be null");
 209
 210
 211         final String shardName = actorContext.getShardStrategyFactory().getStrategy(treeId).findShard(treeId);
 212         LOG.debug("Registering cohort: {} for tree: {} shard: {}", cohort, treeId, shardName);
 213
 214         DataTreeCohortRegistrationProxy<C> cohortProxy =
 215                 new DataTreeCohortRegistrationProxy<>(actorContext, subtree, cohort);
 216         cohortProxy.init(shardName);
 217         return cohortProxy;
 218     }
 219
 220     @Override
 221     public void onGlobalContextUpdated(final SchemaContext schemaContext) {
 222         actorContext.setSchemaContext(schemaContext);
 223     }
 224
 225     @Override
 226     public void onDatastoreContextUpdated(final DatastoreContextFactory contextFactory) {
 227         LOG.info("DatastoreContext updated for data store {}", actorContext.getDataStoreName());
 228
 229         actorContext.setDatastoreContext(contextFactory);
 230         datastoreConfigMXBean.setContext(contextFactory.getBaseDatastoreContext());
 231     }
 232
 233     @Override
 234     @SuppressWarnings("checkstyle:IllegalCatch")
 235     public void close() {
 236         LOG.info("Closing data store {}", identifier);
 237
 238         if (datastoreConfigMXBean != null) {
 239             datastoreConfigMXBean.unregisterMBean();
 240         }
 241         if (datastoreInfoMXBean != null) {
 242             datastoreInfoMXBean.unregisterMBean();
 243         }
 244
 245         if (closeable != null) {
 246             try {
 247                 closeable.close();
 248             } catch (Exception e) {
 249                 LOG.debug("Error closing instance", e);
 250             }
 251         }
 252
 253         actorContext.shutdown();
 254
 255         if (client != null) {
 256             client.close();
 257         }
 258     }
 259
 260     @Override
 261     public ActorContext getActorContext() {
 262         return actorContext;
 263     }
 264
 265     public void waitTillReady() {
 266         LOG.info("Beginning to wait for data store to become ready : {}", identifier);
 267
 268         try {
 269             if (waitTillReadyCountDownLatch.await(waitTillReadyTimeInMillis, TimeUnit.MILLISECONDS)) {
 270                 LOG.debug("Data store {} is now ready", identifier);
 271             } else {
 272                 LOG.error("Shard leaders failed to settle in {} seconds, giving up",
 273                         TimeUnit.MILLISECONDS.toSeconds(waitTillReadyTimeInMillis));
 274             }
 275         } catch (InterruptedException e) {
 276             LOG.error("Interrupted while waiting for shards to settle", e);
 277         }
 278     }
 279
 280     @SuppressWarnings("checkstyle:IllegalCatch")
 281     private static ActorRef createShardManager(final ActorSystem actorSystem, final ShardManagerCreator creator,
 282             final String shardDispatcher, final String shardManagerId) {
 283         Exception lastException = null;
 284
 285         for (int i = 0; i < 100; i++) {
 286             try {
 287                 return actorSystem.actorOf(creator.props().withDispatcher(shardDispatcher), shardManagerId);
 288             } catch (Exception e) {
 289                 lastException = e;
 290                 Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
 291                 LOG.debug("Could not create actor {} because of {} - waiting for sometime before retrying "
 292                         + "(retry count = {})", shardManagerId, e.getMessage(), i);
 293             }
 294         }
 295
 296         throw new IllegalStateException("Failed to create Shard Manager", lastException);
 297     }
 298
 299     @VisibleForTesting
 300     public CountDownLatch getWaitTillReadyCountDownLatch() {
 301         return waitTillReadyCountDownLatch;
 302     }
 303
 304     @SuppressWarnings("unchecked")
 305     public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerProxyListener(
 306             final YangInstanceIdentifier shardLookup,
 307             final YangInstanceIdentifier insideShard,
 308             final org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener delegate) {
 309
 310         Preconditions.checkNotNull(shardLookup, "shardLookup should not be null");
 311         Preconditions.checkNotNull(insideShard, "insideShard should not be null");
 312         Preconditions.checkNotNull(delegate, "delegate should not be null");
 313
 314         final String shardName = actorContext.getShardStrategyFactory().getStrategy(shardLookup).findShard(shardLookup);
 315         LOG.debug("Registering tree listener: {} for tree: {} shard: {}, path inside shard: {}",
 316                 delegate,shardLookup, shardName, insideShard);
 317
 318         final DataTreeChangeListenerProxy<DOMDataTreeChangeListener> listenerRegistrationProxy =
 319                 new DataTreeChangeListenerProxy<>(actorContext,
 320                         // wrap this in the ClusteredDOMDataTreeChangeLister interface
 321                         // since we always want clustered registration
 322                         (ClusteredDOMDataTreeChangeListener) delegate::onDataTreeChanged, insideShard);
 323         listenerRegistrationProxy.init(shardName);
 324
 325         return (ListenerRegistration<L>) listenerRegistrationProxy;
 326     }
 327
 328     @SuppressWarnings("unchecked")
 329     public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerShardConfigListener(
 330             final YangInstanceIdentifier internalPath,
 331             final DOMDataTreeChangeListener delegate) {
 332         Preconditions.checkNotNull(delegate, "delegate should not be null");
 333
 334         LOG.debug("Registering a listener for the configuration shard: {}", internalPath);
 335
 336         final DataTreeChangeListenerProxy<DOMDataTreeChangeListener> proxy =
 337                 new DataTreeChangeListenerProxy<>(actorContext, delegate, internalPath);
 338         proxy.init(ClusterUtils.PREFIX_CONFIG_SHARD_ID);
 339
 340         return (ListenerRegistration<L>) proxy;
 341     }
 342
 343 }