package org.opendaylight.controller.cluster.datastore.utils;
+import static akka.pattern.Patterns.ask;
import akka.actor.ActorPath;
import akka.actor.ActorRef;
import akka.actor.ActorSelection;
import akka.actor.ActorSystem;
+import akka.actor.Address;
import akka.actor.PoisonPill;
+import akka.dispatch.Futures;
+import akka.dispatch.Mapper;
+import akka.dispatch.OnComplete;
+import akka.pattern.AskTimeoutException;
import akka.util.Timeout;
+import com.codahale.metrics.JmxReporter;
+import com.codahale.metrics.MetricRegistry;
+import com.codahale.metrics.Timer;
+import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
+import com.google.common.base.Strings;
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.util.concurrent.RateLimiter;
+import java.util.concurrent.TimeUnit;
+import org.opendaylight.controller.cluster.common.actor.CommonConfig;
import org.opendaylight.controller.cluster.datastore.ClusterWrapper;
import org.opendaylight.controller.cluster.datastore.Configuration;
+import org.opendaylight.controller.cluster.datastore.DatastoreContext;
+import org.opendaylight.controller.cluster.datastore.exceptions.LocalShardNotFoundException;
+import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
import org.opendaylight.controller.cluster.datastore.exceptions.NotInitializedException;
+import org.opendaylight.controller.cluster.datastore.exceptions.PrimaryNotFoundException;
import org.opendaylight.controller.cluster.datastore.exceptions.TimeoutException;
-import org.opendaylight.controller.cluster.datastore.messages.ActorNotInitialized;
+import org.opendaylight.controller.cluster.datastore.exceptions.UnknownMessageException;
import org.opendaylight.controller.cluster.datastore.messages.FindLocalShard;
import org.opendaylight.controller.cluster.datastore.messages.FindPrimary;
import org.opendaylight.controller.cluster.datastore.messages.LocalShardFound;
+import org.opendaylight.controller.cluster.datastore.messages.LocalShardNotFound;
import org.opendaylight.controller.cluster.datastore.messages.PrimaryFound;
import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
import org.opendaylight.yangtools.yang.model.api.SchemaContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import scala.concurrent.Await;
+import scala.concurrent.ExecutionContext;
import scala.concurrent.Future;
import scala.concurrent.duration.Duration;
import scala.concurrent.duration.FiniteDuration;
-import java.util.concurrent.TimeUnit;
-
-import static akka.pattern.Patterns.ask;
-
/**
* The ActorContext class contains utility methods which could be used by
* non-actors (like DistributedDataStore) to work with actors a little more
* but should not be passed to actors especially remote actors
*/
public class ActorContext {
- private static final Logger
- LOG = LoggerFactory.getLogger(ActorContext.class);
-
- private static final FiniteDuration DEFAULT_OPER_DURATION = Duration.create(5, TimeUnit.SECONDS);
+ private static final Logger LOG = LoggerFactory.getLogger(ActorContext.class);
+ private static final String UNKNOWN_DATA_STORE_TYPE = "unknown";
+ private static final String DISTRIBUTED_DATA_STORE_METRIC_REGISTRY = "distributed-data-store";
+ private static final String METRIC_RATE = "rate";
+ private static final String DOMAIN = "org.opendaylight.controller.cluster.datastore";
+ private static final Mapper<Throwable, Throwable> FIND_PRIMARY_FAILURE_TRANSFORMER =
+ new Mapper<Throwable, Throwable>() {
+ @Override
+ public Throwable apply(Throwable failure) {
+ Throwable actualFailure = failure;
+ if(failure instanceof AskTimeoutException) {
+ // A timeout exception most likely means the shard isn't initialized.
+ actualFailure = new NotInitializedException(
+ "Timed out trying to find the primary shard. Most likely cause is the " +
+ "shard is not initialized yet.");
+ }
+ return actualFailure;
+ }
+ };
public static final String MAILBOX = "bounded-mailbox";
private final ActorSystem actorSystem;
private final ActorRef shardManager;
private final ClusterWrapper clusterWrapper;
private final Configuration configuration;
+ private DatastoreContext datastoreContext;
+ private FiniteDuration operationDuration;
+ private Timeout operationTimeout;
+ private final String selfAddressHostPort;
+ private RateLimiter txRateLimiter;
+ private final MetricRegistry metricRegistry = new MetricRegistry();
+ private final JmxReporter jmxReporter = JmxReporter.forRegistry(metricRegistry).inDomain(DOMAIN).build();
+ private final int transactionOutstandingOperationLimit;
+ private Timeout transactionCommitOperationTimeout;
+ private Timeout shardInitializationTimeout;
+ private final Dispatchers dispatchers;
+ private Cache<String, Future<ActorSelection>> primaryShardActorSelectionCache;
+
private volatile SchemaContext schemaContext;
- private FiniteDuration operationDuration = DEFAULT_OPER_DURATION;
- private Timeout operationTimeout = new Timeout(operationDuration);
+ private volatile boolean updated;
+
+ public ActorContext(ActorSystem actorSystem, ActorRef shardManager,
+ ClusterWrapper clusterWrapper, Configuration configuration) {
+ this(actorSystem, shardManager, clusterWrapper, configuration,
+ DatastoreContext.newBuilder().build());
+ }
public ActorContext(ActorSystem actorSystem, ActorRef shardManager,
- ClusterWrapper clusterWrapper,
- Configuration configuration) {
+ ClusterWrapper clusterWrapper, Configuration configuration,
+ DatastoreContext datastoreContext) {
this.actorSystem = actorSystem;
this.shardManager = shardManager;
this.clusterWrapper = clusterWrapper;
this.configuration = configuration;
+ this.datastoreContext = datastoreContext;
+ this.dispatchers = new Dispatchers(actorSystem.dispatchers());
+
+ setCachedProperties();
+
+ Address selfAddress = clusterWrapper.getSelfAddress();
+ if (selfAddress != null && !selfAddress.host().isEmpty()) {
+ selfAddressHostPort = selfAddress.host().get() + ":" + selfAddress.port().get();
+ } else {
+ selfAddressHostPort = null;
+ }
+
+ transactionOutstandingOperationLimit = new CommonConfig(this.getActorSystem().settings().config()).getMailBoxCapacity();
+ jmxReporter.start();
+
+ }
+
+ private void setCachedProperties() {
+ txRateLimiter = RateLimiter.create(datastoreContext.getTransactionCreationInitialRateLimit());
+
+ operationDuration = Duration.create(datastoreContext.getOperationTimeoutInSeconds(), TimeUnit.SECONDS);
+ operationTimeout = new Timeout(operationDuration);
+
+ transactionCommitOperationTimeout = new Timeout(Duration.create(
+ datastoreContext.getShardTransactionCommitTimeoutInSeconds(), TimeUnit.SECONDS));
+
+ shardInitializationTimeout = new Timeout(datastoreContext.getShardInitializationTimeout().duration().$times(2));
+
+ primaryShardActorSelectionCache = CacheBuilder.newBuilder()
+ .expireAfterWrite(datastoreContext.getShardLeaderElectionTimeout().duration().toMillis(), TimeUnit.MILLISECONDS)
+ .build();
+ }
+
+ public DatastoreContext getDatastoreContext() {
+ return datastoreContext;
}
public ActorSystem getActorSystem() {
this.schemaContext = schemaContext;
if(shardManager != null) {
- shardManager.tell(new UpdateSchemaContext(schemaContext), null);
+ shardManager.tell(new UpdateSchemaContext(schemaContext), ActorRef.noSender());
}
}
- public void setOperationTimeout(int timeoutInSeconds) {
- operationDuration = Duration.create(timeoutInSeconds, TimeUnit.SECONDS);
- operationTimeout = new Timeout(operationDuration);
+ public void setDatastoreContext(DatastoreContext context) {
+ this.datastoreContext = context;
+ setCachedProperties();
+
+ // We write the 'updated' volatile to trigger a write memory barrier so that the writes above
+ // will be published immediately even though they may not be immediately visible to other
+ // threads due to unsynchronized reads. That's OK though - we're going for eventual
+ // consistency here as immediately visible updates to these members aren't critical. These
+ // members could've been made volatile but wanted to avoid volatile reads as these are
+ // accessed often and updates will be infrequent.
+
+ updated = true;
+
+ if(shardManager != null) {
+ shardManager.tell(context, ActorRef.noSender());
+ }
}
public SchemaContext getSchemaContext() {
return schemaContext;
}
- /**
- * Finds the primary shard for the given shard name
- *
- * @param shardName
- * @return
- */
- public Optional<ActorSelection> findPrimaryShard(String shardName) {
- String path = findPrimaryPathOrNull(shardName);
- if (path == null){
- return Optional.absent();
+ public Future<ActorSelection> findPrimaryShardAsync(final String shardName) {
+ Future<ActorSelection> ret = primaryShardActorSelectionCache.getIfPresent(shardName);
+ if(ret != null){
+ return ret;
}
- return Optional.of(actorSystem.actorSelection(path));
+ Future<Object> future = executeOperationAsync(shardManager,
+ new FindPrimary(shardName, true), shardInitializationTimeout);
+
+ return future.transform(new Mapper<Object, ActorSelection>() {
+ @Override
+ public ActorSelection checkedApply(Object response) throws Exception {
+ if(response instanceof PrimaryFound) {
+ PrimaryFound found = (PrimaryFound)response;
+
+ LOG.debug("Primary found {}", found.getPrimaryPath());
+ ActorSelection actorSelection = actorSystem.actorSelection(found.getPrimaryPath());
+ primaryShardActorSelectionCache.put(shardName, Futures.successful(actorSelection));
+ return actorSelection;
+ } else if(response instanceof NotInitializedException) {
+ throw (NotInitializedException)response;
+ } else if(response instanceof PrimaryNotFoundException) {
+ throw (PrimaryNotFoundException)response;
+ } else if(response instanceof NoShardLeaderException) {
+ throw (NoShardLeaderException)response;
+ }
+
+ throw new UnknownMessageException(String.format(
+ "FindPrimary returned unkown response: %s", response));
+ }
+ }, FIND_PRIMARY_FAILURE_TRANSFORMER, getClientDispatcher());
}
/**
- * Finds a local shard given it's shard name and return it's ActorRef
+ * Finds a local shard given its shard name and return it's ActorRef
*
* @param shardName the name of the local shard that needs to be found
* @return a reference to a local shard actor which represents the shard
* specified by the shardName
*/
public Optional<ActorRef> findLocalShard(String shardName) {
- Object result = executeOperation(shardManager, new FindLocalShard(shardName));
+ Object result = executeOperation(shardManager, new FindLocalShard(shardName, false));
if (result instanceof LocalShardFound) {
LocalShardFound found = (LocalShardFound) result;
return Optional.absent();
}
-
- private String findPrimaryPathOrNull(String shardName) {
- Object result = executeOperation(shardManager, new FindPrimary(shardName).toSerializable());
-
- if (result.getClass().equals(PrimaryFound.SERIALIZABLE_CLASS)) {
- PrimaryFound found = PrimaryFound.fromSerializable(result);
-
- LOG.debug("Primary found {}", found.getPrimaryPath());
- return found.getPrimaryPath();
-
- } else if (result.getClass().equals(ActorNotInitialized.class)){
- throw new NotInitializedException(
- String.format("Found primary shard[%s] but its not initialized yet. Please try again later", shardName)
- );
-
- } else {
- return null;
- }
+ /**
+ * Finds a local shard async given its shard name and return a Future from which to obtain the
+ * ActorRef.
+ *
+ * @param shardName the name of the local shard that needs to be found
+ */
+ public Future<ActorRef> findLocalShardAsync( final String shardName) {
+ Future<Object> future = executeOperationAsync(shardManager,
+ new FindLocalShard(shardName, true), shardInitializationTimeout);
+
+ return future.map(new Mapper<Object, ActorRef>() {
+ @Override
+ public ActorRef checkedApply(Object response) throws Throwable {
+ if(response instanceof LocalShardFound) {
+ LocalShardFound found = (LocalShardFound)response;
+ LOG.debug("Local shard found {}", found.getPath());
+ return found.getPath();
+ } else if(response instanceof NotInitializedException) {
+ throw (NotInitializedException)response;
+ } else if(response instanceof LocalShardNotFound) {
+ throw new LocalShardNotFoundException(
+ String.format("Local shard for %s does not exist.", shardName));
+ }
+
+ throw new UnknownMessageException(String.format(
+ "FindLocalShard returned unkown response: %s", response));
+ }
+ }, getClientDispatcher());
}
-
/**
* Executes an operation on a local actor and wait for it's response
*
Preconditions.checkArgument(actor != null, "actor must not be null");
Preconditions.checkArgument(message != null, "message must not be null");
- LOG.debug("Sending message {} to {}", message.getClass().toString(), actor.toString());
- return ask(actor, message, timeout);
+ LOG.debug("Sending message {} to {}", message.getClass(), actor);
+ return doAsk(actor, message, timeout);
}
/**
*
* @param actor the ActorSelection
* @param message the message to send
+ * @param timeout the operation timeout
* @return a Future containing the eventual result
*/
- public Future<Object> executeOperationAsync(ActorSelection actor, Object message) {
+ public Future<Object> executeOperationAsync(ActorSelection actor, Object message,
+ Timeout timeout) {
Preconditions.checkArgument(actor != null, "actor must not be null");
Preconditions.checkArgument(message != null, "message must not be null");
- LOG.debug("Sending message {} to {}", message.getClass().toString(), actor.toString());
+ LOG.debug("Sending message {} to {}", message.getClass(), actor);
- return ask(actor, message, operationTimeout);
+ return doAsk(actor, message, timeout);
+ }
+
+ /**
+ * Execute an operation on a remote actor asynchronously.
+ *
+ * @param actor the ActorSelection
+ * @param message the message to send
+ * @return a Future containing the eventual result
+ */
+ public Future<Object> executeOperationAsync(ActorSelection actor, Object message) {
+ return executeOperationAsync(actor, message, operationTimeout);
}
/**
Preconditions.checkArgument(actor != null, "actor must not be null");
Preconditions.checkArgument(message != null, "message must not be null");
- LOG.debug("Sending message {} to {}", message.getClass().toString(), actor.toString());
+ LOG.debug("Sending message {} to {}", message.getClass(), actor);
actor.tell(message, ActorRef.noSender());
}
actorSystem.shutdown();
}
+ public ClusterWrapper getClusterWrapper() {
+ return clusterWrapper;
+ }
+
public String getCurrentMemberName(){
return clusterWrapper.getCurrentMemberName();
}
*
* @param message
*/
- public void broadcast(Object message){
- for(String shardName : configuration.getAllShardNames()){
-
- Optional<ActorSelection> primary = findPrimaryShard(shardName);
- if (primary.isPresent()) {
- primary.get().tell(message, ActorRef.noSender());
- } else {
- LOG.warn("broadcast failed to send message {} to shard {}. Primary not found",
- message.getClass().getSimpleName(), shardName);
- }
+ public void broadcast(final Object message){
+ for(final String shardName : configuration.getAllShardNames()){
+
+ Future<ActorSelection> primaryFuture = findPrimaryShardAsync(shardName);
+ primaryFuture.onComplete(new OnComplete<ActorSelection>() {
+ @Override
+ public void onComplete(Throwable failure, ActorSelection primaryShard) {
+ if(failure != null) {
+ LOG.warn("broadcast failed to send message {} to shard {}: {}",
+ message.getClass().getSimpleName(), shardName, failure);
+ } else {
+ primaryShard.tell(message, ActorRef.noSender());
+ }
+ }
+ }, getClientDispatcher());
}
}
public FiniteDuration getOperationDuration() {
return operationDuration;
}
+
+ public boolean isPathLocal(String path) {
+ if (Strings.isNullOrEmpty(path)) {
+ return false;
+ }
+
+ int pathAtIndex = path.indexOf('@');
+ if (pathAtIndex == -1) {
+ //if the path is of local format, then its local and is co-located
+ return true;
+
+ } else if (selfAddressHostPort != null) {
+ // self-address and tx actor path, both are of remote path format
+ int slashIndex = path.indexOf('/', pathAtIndex);
+
+ if (slashIndex == -1) {
+ return false;
+ }
+
+ String hostPort = path.substring(pathAtIndex + 1, slashIndex);
+ return hostPort.equals(selfAddressHostPort);
+
+ } else {
+ // self address is local format and tx actor path is remote format
+ return false;
+ }
+ }
+
+ /**
+ * @deprecated This method is present only to support backward compatibility with Helium and should not be
+ * used any further
+ *
+ *
+ * @param primaryPath
+ * @param localPathOfRemoteActor
+ * @return
+ */
+ @Deprecated
+ public String resolvePath(final String primaryPath,
+ final String localPathOfRemoteActor) {
+ StringBuilder builder = new StringBuilder();
+ String[] primaryPathElements = primaryPath.split("/");
+ builder.append(primaryPathElements[0]).append("//")
+ .append(primaryPathElements[1]).append(primaryPathElements[2]);
+ String[] remotePathElements = localPathOfRemoteActor.split("/");
+ for (int i = 3; i < remotePathElements.length; i++) {
+ builder.append("/").append(remotePathElements[i]);
+ }
+
+ return builder.toString();
+ }
+
+ /**
+ * Get the maximum number of operations that are to be permitted within a transaction before the transaction
+ * should begin throttling the operations
+ *
+ * Parking reading this configuration here because we need to get to the actor system settings
+ *
+ * @return
+ */
+ public int getTransactionOutstandingOperationLimit(){
+ return transactionOutstandingOperationLimit;
+ }
+
+ /**
+ * This is a utility method that lets us get a Timer object for any operation. This is a little open-ended to allow
+ * us to create a timer for pretty much anything.
+ *
+ * @param operationName
+ * @return
+ */
+ public Timer getOperationTimer(String operationName){
+ final String rate = MetricRegistry.name(DISTRIBUTED_DATA_STORE_METRIC_REGISTRY, datastoreContext.getDataStoreType(), operationName, METRIC_RATE);
+ return metricRegistry.timer(rate);
+ }
+
+ /**
+ * Get the type of the data store to which this ActorContext belongs
+ *
+ * @return
+ */
+ public String getDataStoreType() {
+ return datastoreContext.getDataStoreType();
+ }
+
+ /**
+ * Set the number of transaction creation permits that are to be allowed
+ *
+ * @param permitsPerSecond
+ */
+ public void setTxCreationLimit(double permitsPerSecond){
+ txRateLimiter.setRate(permitsPerSecond);
+ }
+
+ /**
+ * Get the current transaction creation rate limit
+ * @return
+ */
+ public double getTxCreationLimit(){
+ return txRateLimiter.getRate();
+ }
+
+ /**
+ * Try to acquire a transaction creation permit. Will block if no permits are available.
+ */
+ public void acquireTxCreationPermit(){
+ txRateLimiter.acquire();
+ }
+
+ /**
+ * Return the operation timeout to be used when committing transactions
+ * @return
+ */
+ public Timeout getTransactionCommitOperationTimeout(){
+ return transactionCommitOperationTimeout;
+ }
+
+ /**
+ * An akka dispatcher that is meant to be used when processing ask Futures which were triggered by client
+ * code on the datastore
+ * @return
+ */
+ public ExecutionContext getClientDispatcher() {
+ return this.dispatchers.getDispatcher(Dispatchers.DispatcherType.Client);
+ }
+
+ public String getNotificationDispatcherPath(){
+ return this.dispatchers.getDispatcherPath(Dispatchers.DispatcherType.Notification);
+ }
+
+ protected Future<Object> doAsk(ActorRef actorRef, Object message, Timeout timeout){
+ return ask(actorRef, message, timeout);
+ }
+
+ protected Future<Object> doAsk(ActorSelection actorRef, Object message, Timeout timeout){
+ return ask(actorRef, message, timeout);
+ }
+
+ @VisibleForTesting
+ Cache<String, Future<ActorSelection>> getPrimaryShardActorSelectionCache() {
+ return primaryShardActorSelectionCache;
+ }
}
Code Review / controller.git / blobdiff