opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DistributedDataStore.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.databroker.actors.dds.DistributedDataStoreClient;
  23 import org.opendaylight.controller.cluster.databroker.actors.dds.DistributedDataStoreClientActor;
  24 import org.opendaylight.controller.cluster.datastore.config.Configuration;
  25 import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
  26 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.DatastoreConfigurationMXBeanImpl;
  27 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.DatastoreInfoMXBeanImpl;
  28 import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshot;
  29 import org.opendaylight.controller.cluster.datastore.shardmanager.ShardManagerCreator;
  30 import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
  31 import org.opendaylight.controller.cluster.datastore.utils.Dispatchers;
  32 import org.opendaylight.controller.cluster.datastore.utils.PrimaryShardInfoFutureCache;
  33 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
  34 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  35 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
  36 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  37 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
  38 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
  39 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTreeChangePublisher;
  40 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  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.yangtools.concepts.ListenerRegistration;
  46 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  47 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  48 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  49 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  50 import org.slf4j.Logger;
  51 import org.slf4j.LoggerFactory;
  52
  53 /**
  54  *
  55  */
  56 public class DistributedDataStore implements DistributedDataStoreInterface, SchemaContextListener,
  57         DatastoreContextConfigAdminOverlay.Listener, DOMStoreTreeChangePublisher, DOMDataTreeCommitCohortRegistry, AutoCloseable {
  58
  59     private static final Logger LOG = LoggerFactory.getLogger(DistributedDataStore.class);
  60
  61     private static final long READY_WAIT_FACTOR = 3;
  62
  63     private final ActorContext actorContext;
  64     private final long waitTillReadyTimeInMillis;
  65
  66     private AutoCloseable closeable;
  67
  68     private DatastoreConfigurationMXBeanImpl datastoreConfigMXBean;
  69
  70     private DatastoreInfoMXBeanImpl datastoreInfoMXBean;
  71
  72     private final CountDownLatch waitTillReadyCountDownLatch = new CountDownLatch(1);
  73
  74     private final ClientIdentifier identifier;
  75     private final DistributedDataStoreClient client;
  76
  77     private final TransactionContextFactory txContextFactory;
  78
  79     public DistributedDataStore(final ActorSystem actorSystem, final ClusterWrapper cluster,
  80             final Configuration configuration, final DatastoreContextFactory datastoreContextFactory,
  81             final DatastoreSnapshot restoreFromSnapshot) {
  82         Preconditions.checkNotNull(actorSystem, "actorSystem should not be null");
  83         Preconditions.checkNotNull(cluster, "cluster should not be null");
  84         Preconditions.checkNotNull(configuration, "configuration should not be null");
  85         Preconditions.checkNotNull(datastoreContextFactory, "datastoreContextFactory should not be null");
  86
  87         String shardManagerId = ShardManagerIdentifier.builder()
  88                 .type(datastoreContextFactory.getBaseDatastoreContext().getDataStoreName()).build().toString();
  89
  90         LOG.info("Creating ShardManager : {}", shardManagerId);
  91
  92         String shardDispatcher =
  93                 new Dispatchers(actorSystem.dispatchers()).getDispatcherPath(Dispatchers.DispatcherType.Shard);
  94
  95         PrimaryShardInfoFutureCache primaryShardInfoCache = new PrimaryShardInfoFutureCache();
  96
  97         ShardManagerCreator creator = new ShardManagerCreator().cluster(cluster).configuration(configuration).
  98                 datastoreContextFactory(datastoreContextFactory).waitTillReadyCountdownLatch(waitTillReadyCountDownLatch).
  99                 primaryShardInfoCache(primaryShardInfoCache).restoreFromSnapshot(restoreFromSnapshot);
 100
 101         actorContext = new ActorContext(actorSystem, createShardManager(actorSystem, creator, shardDispatcher,
 102                 shardManagerId), cluster, configuration, datastoreContextFactory.getBaseDatastoreContext(), primaryShardInfoCache);
 103
 104         final Props clientProps = DistributedDataStoreClientActor.props(cluster.getCurrentMemberName(),
 105             datastoreContextFactory.getBaseDatastoreContext().getDataStoreName(), actorContext);
 106         final ActorRef clientActor = actorSystem.actorOf(clientProps);
 107         try {
 108             client = DistributedDataStoreClientActor.getDistributedDataStoreClient(clientActor, 30, TimeUnit.SECONDS);
 109         } catch (Exception e) {
 110             LOG.error("Failed to get actor for {}", clientProps, e);
 111             clientActor.tell(PoisonPill.getInstance(), ActorRef.noSender());
 112             throw Throwables.propagate(e);
 113         }
 114
 115         identifier = client.getIdentifier();
 116         LOG.debug("Distributed data store client {} started", identifier);
 117
 118         this.waitTillReadyTimeInMillis =
 119                 actorContext.getDatastoreContext().getShardLeaderElectionTimeout().duration().toMillis() * READY_WAIT_FACTOR;
 120
 121         this.txContextFactory = new TransactionContextFactory(actorContext, identifier);
 122
 123         datastoreConfigMXBean = new DatastoreConfigurationMXBeanImpl(
 124                 datastoreContextFactory.getBaseDatastoreContext().getDataStoreMXBeanType());
 125         datastoreConfigMXBean.setContext(datastoreContextFactory.getBaseDatastoreContext());
 126         datastoreConfigMXBean.registerMBean();
 127
 128         datastoreInfoMXBean = new DatastoreInfoMXBeanImpl(datastoreContextFactory.getBaseDatastoreContext().
 129                 getDataStoreMXBeanType(), actorContext);
 130         datastoreInfoMXBean.registerMBean();
 131     }
 132
 133     @VisibleForTesting
 134     DistributedDataStore(final ActorContext actorContext, final ClientIdentifier identifier) {
 135         this.actorContext = Preconditions.checkNotNull(actorContext, "actorContext should not be null");
 136         this.client = null;
 137         this.identifier = Preconditions.checkNotNull(identifier);
 138         this.txContextFactory = new TransactionContextFactory(actorContext, identifier);
 139         this.waitTillReadyTimeInMillis =
 140                 actorContext.getDatastoreContext().getShardLeaderElectionTimeout().duration().toMillis() * READY_WAIT_FACTOR;
 141     }
 142
 143     public void setCloseable(final AutoCloseable closeable) {
 144         this.closeable = closeable;
 145     }
 146
 147     @SuppressWarnings("unchecked")
 148     @Override
 149     public <L extends AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
 150                                               ListenerRegistration<L> registerChangeListener(
 151         final YangInstanceIdentifier path, final L listener,
 152         final AsyncDataBroker.DataChangeScope scope) {
 153
 154         Preconditions.checkNotNull(path, "path should not be null");
 155         Preconditions.checkNotNull(listener, "listener should not be null");
 156
 157         LOG.debug("Registering listener: {} for path: {} scope: {}", listener, path, scope);
 158
 159         String shardName = actorContext.getShardStrategyFactory().getStrategy(path).findShard(path);
 160
 161         final DataChangeListenerRegistrationProxy listenerRegistrationProxy =
 162                 new DataChangeListenerRegistrationProxy(shardName, actorContext, listener);
 163         listenerRegistrationProxy.init(path, scope);
 164
 165         return listenerRegistrationProxy;
 166     }
 167
 168     @Override
 169     public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerTreeChangeListener(final YangInstanceIdentifier treeId, final L listener) {
 170         Preconditions.checkNotNull(treeId, "treeId should not be null");
 171         Preconditions.checkNotNull(listener, "listener should not be null");
 172
 173         final String shardName = actorContext.getShardStrategyFactory().getStrategy(treeId).findShard(treeId);
 174         LOG.debug("Registering tree listener: {} for tree: {} shard: {}", listener, treeId, shardName);
 175
 176         final DataTreeChangeListenerProxy<L> listenerRegistrationProxy =
 177                 new DataTreeChangeListenerProxy<L>(actorContext, listener);
 178         listenerRegistrationProxy.init(shardName, treeId);
 179
 180         return listenerRegistrationProxy;
 181     }
 182
 183
 184     @Override
 185     public <C extends DOMDataTreeCommitCohort> DOMDataTreeCommitCohortRegistration<C> registerCommitCohort(
 186             final DOMDataTreeIdentifier subtree, final C cohort) {
 187         YangInstanceIdentifier treeId =
 188                 Preconditions.checkNotNull(subtree, "subtree should not be null").getRootIdentifier();
 189         Preconditions.checkNotNull(cohort, "listener should not be null");
 190
 191
 192         final String shardName = actorContext.getShardStrategyFactory().getStrategy(treeId).findShard(treeId);
 193         LOG.debug("Registering cohort: {} for tree: {} shard: {}", cohort, treeId, shardName);
 194
 195         DataTreeCohortRegistrationProxy<C> cohortProxy = new DataTreeCohortRegistrationProxy<C>(actorContext, subtree, cohort);
 196         cohortProxy.init(shardName);
 197         return cohortProxy;
 198     }
 199
 200     @Override
 201     public DOMStoreTransactionChain createTransactionChain() {
 202         return txContextFactory.createTransactionChain();
 203     }
 204
 205     @Override
 206     public DOMStoreReadTransaction newReadOnlyTransaction() {
 207        return new TransactionProxy(txContextFactory, TransactionType.READ_ONLY);
 208     }
 209
 210     @Override
 211     public DOMStoreWriteTransaction newWriteOnlyTransaction() {
 212         actorContext.acquireTxCreationPermit();
 213         return new TransactionProxy(txContextFactory, TransactionType.WRITE_ONLY);
 214     }
 215
 216     @Override
 217     public DOMStoreReadWriteTransaction newReadWriteTransaction() {
 218         actorContext.acquireTxCreationPermit();
 219         return new TransactionProxy(txContextFactory, TransactionType.READ_WRITE);
 220     }
 221
 222     @Override
 223     public void onGlobalContextUpdated(final SchemaContext schemaContext) {
 224         actorContext.setSchemaContext(schemaContext);
 225     }
 226
 227     @Override
 228     public void onDatastoreContextUpdated(final DatastoreContextFactory contextFactory) {
 229         LOG.info("DatastoreContext updated for data store {}", actorContext.getDataStoreName());
 230
 231         actorContext.setDatastoreContext(contextFactory);
 232         datastoreConfigMXBean.setContext(contextFactory.getBaseDatastoreContext());
 233     }
 234
 235     @Override
 236     public void close() {
 237         LOG.info("Closing data store {}", identifier);
 238
 239         if (datastoreConfigMXBean != null) {
 240             datastoreConfigMXBean.unregisterMBean();
 241         }
 242         if (datastoreInfoMXBean != null) {
 243             datastoreInfoMXBean.unregisterMBean();
 244         }
 245
 246         if (closeable != null) {
 247             try {
 248                 closeable.close();
 249             } catch (Exception e) {
 250                 LOG.debug("Error closing instance", e);
 251             }
 252         }
 253
 254         txContextFactory.close();
 255         actorContext.shutdown();
 256
 257         if (client != null) {
 258             client.close();
 259         }
 260     }
 261
 262     @Override
 263     public ActorContext getActorContext() {
 264         return actorContext;
 265     }
 266
 267     public void waitTillReady(){
 268         LOG.info("Beginning to wait for data store to become ready : {}", identifier);
 269
 270         try {
 271             if (waitTillReadyCountDownLatch.await(waitTillReadyTimeInMillis, TimeUnit.MILLISECONDS)) {
 272                 LOG.debug("Data store {} is now ready", identifier);
 273             } else {
 274                 LOG.error("Shared leaders failed to settle in {} seconds, giving up", TimeUnit.MILLISECONDS.toSeconds(waitTillReadyTimeInMillis));
 275             }
 276         } catch (InterruptedException e) {
 277             LOG.error("Interrupted while waiting for shards to settle", e);
 278         }
 279     }
 280
 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).withMailbox(
 288                         ActorContext.BOUNDED_MAILBOX), shardManagerId);
 289             } catch (Exception e){
 290                 lastException = e;
 291                 Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
 292                 LOG.debug("Could not create actor {} because of {} - waiting for sometime before retrying (retry count = {})",
 293                     shardManagerId, e.getMessage(), i);
 294             }
 295         }
 296
 297         throw new IllegalStateException("Failed to create Shard Manager", lastException);
 298     }
 299
 300     @VisibleForTesting
 301     public CountDownLatch getWaitTillReadyCountDownLatch() {
 302         return waitTillReadyCountDownLatch;
 303     }
 304 }