--- /dev/null
+/*
+ * Copyright (c) 2021 PANTHEON.tech, s.r.o. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.eos.akka.registry.candidate;
+
+import akka.actor.typed.Behavior;
+import akka.actor.typed.javadsl.AbstractBehavior;
+import akka.actor.typed.javadsl.ActorContext;
+import akka.actor.typed.javadsl.Behaviors;
+import akka.actor.typed.javadsl.Receive;
+import akka.actor.typed.javadsl.StashBuffer;
+import akka.cluster.ddata.ORMap;
+import akka.cluster.ddata.ORSet;
+import akka.cluster.ddata.SelfUniqueAddress;
+import akka.cluster.ddata.typed.javadsl.DistributedData;
+import akka.cluster.ddata.typed.javadsl.Replicator;
+import akka.cluster.ddata.typed.javadsl.ReplicatorMessageAdapter;
+import akka.cluster.typed.Cluster;
+import java.time.Duration;
+import java.util.Map;
+import java.util.Set;
+import org.opendaylight.controller.eos.akka.registry.candidate.command.CandidateRegistryCommand;
+import org.opendaylight.controller.eos.akka.registry.candidate.command.InitialCandidateSync;
+import org.opendaylight.controller.eos.akka.registry.candidate.command.InternalUpdateResponse;
+import org.opendaylight.controller.eos.akka.registry.candidate.command.RegisterCandidate;
+import org.opendaylight.controller.eos.akka.registry.candidate.command.UnregisterCandidate;
+import org.opendaylight.mdsal.eos.dom.api.DOMEntity;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class CandidateRegistryInit extends AbstractBehavior<CandidateRegistryCommand> {
+
+ private static final Logger LOG = LoggerFactory.getLogger(CandidateRegistryInit.class);
+
+ private static final String DATACENTER_PREFIX = "dc-";
+
+ private final StashBuffer<CandidateRegistryCommand> stash;
+ private final ReplicatorMessageAdapter<CandidateRegistryCommand,
+ ORMap<DOMEntity, ORSet<String>>> candidateReplicator;
+ private final String selfRole;
+ private final SelfUniqueAddress node;
+
+ public CandidateRegistryInit(final ActorContext<CandidateRegistryCommand> ctx,
+ final StashBuffer<CandidateRegistryCommand> stash,
+ final ReplicatorMessageAdapter<CandidateRegistryCommand,
+ ORMap<DOMEntity, ORSet<String>>> candidateReplicator) {
+ super(ctx);
+ this.stash = stash;
+ this.candidateReplicator = candidateReplicator;
+ selfRole = extractRole(Cluster.get(ctx.getSystem()).selfMember().getRoles());
+
+ this.node = DistributedData.get(ctx.getSystem()).selfUniqueAddress();
+
+
+ this.candidateReplicator.askGet(
+ askReplyTo -> new Replicator.Get<>(
+ CandidateRegistry.KEY,
+ new Replicator.ReadAll(Duration.ofSeconds(15)), askReplyTo),
+ InitialCandidateSync::new);
+
+ LOG.debug("CandidateRegistry syncing behavior started.");
+ }
+
+ public static Behavior<CandidateRegistryCommand> create() {
+ return Behaviors.withStash(100,
+ stash ->
+ Behaviors.setup(ctx -> DistributedData.withReplicatorMessageAdapter(
+ (ReplicatorMessageAdapter<CandidateRegistryCommand,
+ ORMap<DOMEntity, ORSet<String>>> replicatorAdapter) ->
+ new CandidateRegistryInit(ctx, stash, replicatorAdapter))));
+ }
+
+ @Override
+ public Receive<CandidateRegistryCommand> createReceive() {
+ return newReceiveBuilder()
+ .onMessage(InitialCandidateSync.class, this::handleCandidateSync)
+ .onMessage(RegisterCandidate.class, this::stashCommand)
+ .onMessage(UnregisterCandidate.class, this::stashCommand)
+ .build();
+ }
+
+ private Behavior<CandidateRegistryCommand> stashCommand(final CandidateRegistryCommand command) {
+ stash.stash(command);
+ return this;
+ }
+
+ private Behavior<CandidateRegistryCommand> handleCandidateSync(final InitialCandidateSync command) {
+ final Replicator.GetResponse<ORMap<DOMEntity, ORSet<String>>> response = command.getResponse();
+ if (response instanceof Replicator.GetSuccess) {
+ clearExistingCandidates((Replicator.GetSuccess<ORMap<DOMEntity, ORSet<String>>>) response);
+ }
+ // TODO implement other cases if needed, seems like only a retry would be needed here when we get a failure
+ // from distributed data
+ return switchToCandidateRegistry();
+ }
+
+ private void clearExistingCandidates(final Replicator.GetSuccess<ORMap<DOMEntity, ORSet<String>>> response) {
+ final Map<DOMEntity, ORSet<String>> entitiesToCandidates = response.get(response.key()).getEntries();
+
+ for (Map.Entry<DOMEntity, ORSet<String>> entry : entitiesToCandidates.entrySet()) {
+ if (entry.getValue().getElements().contains(selfRole)) {
+ LOG.debug("Clearing candidate: {} from entity: {}, current state of entity candidates: {}",
+ selfRole, entry.getKey(), entry.getValue().getElements());
+ clearRegistration(entry.getKey());
+ }
+ }
+ }
+
+ private void clearRegistration(final DOMEntity entity) {
+ candidateReplicator.askUpdate(
+ askReplyTo -> new Replicator.Update<>(
+ CandidateRegistry.KEY,
+ ORMap.empty(),
+ Replicator.writeLocal(),
+ askReplyTo,
+ map -> map.update(node, entity, ORSet.empty(),
+ value -> value.remove(node, selfRole))),
+ InternalUpdateResponse::new);
+ }
+
+ private Behavior<CandidateRegistryCommand> switchToCandidateRegistry() {
+ LOG.debug("Clearing of candidates from previous instance done, switching to CandidateRegistry.");
+ return stash.unstashAll(CandidateRegistry.create());
+ }
+
+ private static String extractRole(final Set<String> roles) {
+ return roles.stream().filter(role -> !role.contains(DATACENTER_PREFIX))
+ .findFirst().orElseThrow(() -> new IllegalArgumentException("No valid role found."));
+ }
+}
Code Review / controller.git / blobdiff