package org.opendaylight.controller.cluster.datastore;
+import akka.actor.ActorPath;
+import akka.actor.ActorRef;
import akka.actor.Address;
-import akka.actor.UntypedActor;
+import akka.actor.Props;
import akka.event.Logging;
import akka.event.LoggingAdapter;
+import akka.japi.Creator;
import org.opendaylight.controller.cluster.datastore.messages.FindPrimary;
+import org.opendaylight.controller.cluster.datastore.messages.PrimaryFound;
import org.opendaylight.controller.cluster.datastore.messages.PrimaryNotFound;
+import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
import java.util.HashMap;
import java.util.List;
/**
* The ShardManager has the following jobs,
- *
- * - Create all the local shard replicas that belong on this cluster member
- * - Find the primary replica for any given shard
- * - Engage in shard replica elections which decide which replica should be the primary
- *
- * Creation of Shard replicas
- * ==========================
- * When the ShardManager is constructed it reads the cluster configuration to find out which shard replicas
- * belong on this member. It finds out the name of the current cluster member from the Akka Clustering Service.
- *
- * Replica Elections
- * =================
- * The Shard Manager uses multiple cues to initiate election.
- * - When a member of the cluster dies
- * - When a local shard replica dies
- * - When a local shard replica comes alive
+ * <p>
+ * <li> Create all the local shard replicas that belong on this cluster member
+ * <li> Find the primary replica for any given shard
+ * <li> Engage in shard replica elections which decide which replica should be the primary
+ * </p>
+ * <p/>
+ * <h3>>Creation of Shard replicas</h3
+ * <p>
+ * When the ShardManager is constructed it reads the cluster configuration to find out which shard replicas
+ * belong on this member. It finds out the name of the current cluster member from the Akka Clustering Service.
+ * </p>
+ * <p/>
+ * <h3> Replica Elections </h3>
+ * <p/>
+ * <p>
+ * The Shard Manager uses multiple cues to initiate election.
+ * <li> When a member of the cluster dies
+ * <li> When a local shard replica dies
+ * <li> When a local shard replica comes alive
+ * </p>
*/
-public class ShardManager extends UntypedActor {
+public class ShardManager extends AbstractUntypedActor {
// Stores a mapping between a shard name and the address of the current primary
- private final Map<String, Address> shardNameToPrimaryAddress = new HashMap<>();
+ private final Map<String, Address> shardNameToPrimaryAddress =
+ new HashMap<>();
// Stores a mapping between a member name and the address of the member
private final Map<String, Address> memberNameToAddress = new HashMap<>();
// Stores a mapping between the shard name and all the members on which a replica of that shard are available
- private final Map<String, List<String>> shardNameToMembers = new HashMap<>();
+ private final Map<String, List<String>> shardNameToMembers =
+ new HashMap<>();
+
+ private final LoggingAdapter log =
+ Logging.getLogger(getContext().system(), this);
+
+
+ private final Map<String, ActorPath> localShards = new HashMap<>();
+
+
+ private final ClusterWrapper cluster;
+
+ /**
+ * @param type defines the kind of data that goes into shards created by this shard manager. Examples of type would be
+ * configuration or operational
+ */
+ private ShardManager(String type, ClusterWrapper cluster, Configuration configuration) {
+ this.cluster = cluster;
+ String memberName = cluster.getCurrentMemberName();
+ List<String> memberShardNames =
+ configuration.getMemberShardNames(memberName);
- LoggingAdapter log = Logging.getLogger(getContext().system(), this);
+ for(String shardName : memberShardNames){
+ ActorRef actor = getContext()
+ .actorOf(Shard.props(memberName + "-shard-" + shardName + "-" + type),
+ memberName + "-shard-" + shardName + "-" + type);
+ ActorPath path = actor.path();
+ localShards.put(shardName, path);
+ }
+ }
+
+ public static Props props(final String type,
+ final ClusterWrapper cluster,
+ final Configuration configuration) {
+ return Props.create(new Creator<ShardManager>() {
+
+ @Override
+ public ShardManager create() throws Exception {
+ return new ShardManager(type, cluster, configuration);
+ }
+ });
+ }
@Override
- public void onReceive(Object message) throws Exception {
- if(message instanceof FindPrimary ){
+ public void handleReceive(Object message) throws Exception {
+ if (message instanceof FindPrimary) {
FindPrimary msg = ((FindPrimary) message);
- getSender().tell(new PrimaryNotFound(msg.getShardName()), getSelf());
+ String shardName = msg.getShardName();
+
+
+ if (Shard.DEFAULT_NAME.equals(shardName)) {
+ ActorPath defaultShardPath = localShards.get(shardName);
+ if(defaultShardPath == null){
+ throw new IllegalStateException("local default shard not found");
+ }
+ getSender().tell(new PrimaryFound(defaultShardPath.toString()),
+ getSelf());
+ } else {
+ getSender().tell(new PrimaryNotFound(shardName), getSelf());
+ }
+ } else if (message instanceof UpdateSchemaContext) {
+ for(ActorPath path : localShards.values()){
+ getContext().system().actorSelection(path)
+ .forward(message,
+ getContext());
+ }
}
}
+
+
}
Code Review / controller.git / blobdiff