2 * Copyright (c) 2021 PANTHEON.tech, s.r.o. and others. All rights reserved.
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
8 package org.opendaylight.controller.eos.akka.owner.supervisor;
10 import akka.actor.typed.ActorRef;
11 import akka.actor.typed.Behavior;
12 import akka.actor.typed.javadsl.AbstractBehavior;
13 import akka.actor.typed.javadsl.ActorContext;
14 import akka.actor.typed.javadsl.Behaviors;
15 import akka.actor.typed.javadsl.Receive;
16 import akka.cluster.ddata.LWWRegister;
17 import akka.cluster.ddata.LWWRegisterKey;
18 import akka.cluster.ddata.ORMap;
19 import akka.cluster.ddata.ORSet;
20 import akka.cluster.ddata.typed.javadsl.DistributedData;
21 import akka.cluster.ddata.typed.javadsl.Replicator;
22 import akka.cluster.ddata.typed.javadsl.ReplicatorMessageAdapter;
23 import java.time.Duration;
24 import java.util.HashMap;
25 import java.util.HashSet;
28 import org.opendaylight.controller.eos.akka.owner.supervisor.command.InitialCandidateSync;
29 import org.opendaylight.controller.eos.akka.owner.supervisor.command.InitialOwnerSync;
30 import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorCommand;
31 import org.opendaylight.controller.eos.akka.registry.candidate.CandidateRegistry;
32 import org.opendaylight.mdsal.eos.dom.api.DOMEntity;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
37 * Behavior that retrieves current candidates/owners from distributed-data and switches to OwnerSupervisor when the
40 public final class OwnerSyncer extends AbstractBehavior<OwnerSupervisorCommand> {
41 private static final Logger LOG = LoggerFactory.getLogger(OwnerSyncer.class);
43 private final ReplicatorMessageAdapter<OwnerSupervisorCommand, LWWRegister<String>> ownerReplicator;
44 private final Map<DOMEntity, Set<String>> currentCandidates = new HashMap<>();
45 private final Map<DOMEntity, String> currentOwners = new HashMap<>();
47 // String representation of Entity to DOMEntity
48 private final Map<String, DOMEntity> entityLookup = new HashMap<>();
50 private int toSync = -1;
52 private OwnerSyncer(final ActorContext<OwnerSupervisorCommand> context) {
54 LOG.debug("Starting candidate and owner sync");
56 final ActorRef<Replicator.Command> replicator = DistributedData.get(context.getSystem()).replicator();
58 this.ownerReplicator = new ReplicatorMessageAdapter<>(context, replicator, Duration.ofSeconds(5));
60 new ReplicatorMessageAdapter<OwnerSupervisorCommand, ORMap<DOMEntity, ORSet<String>>>(context, replicator,
61 Duration.ofSeconds(5)).askGet(
62 askReplyTo -> new Replicator.Get<>(CandidateRegistry.KEY, Replicator.readLocal(), askReplyTo),
63 InitialCandidateSync::new);
66 public static Behavior<OwnerSupervisorCommand> create() {
67 return Behaviors.setup(OwnerSyncer::new);
71 public Receive<OwnerSupervisorCommand> createReceive() {
72 return newReceiveBuilder()
73 .onMessage(InitialCandidateSync.class, this::onInitialCandidateSync)
74 .onMessage(InitialOwnerSync.class, this::onInitialOwnerSync)
78 private Behavior<OwnerSupervisorCommand> onInitialCandidateSync(final InitialCandidateSync rsp) {
79 final Replicator.GetResponse<ORMap<DOMEntity, ORSet<String>>> response = rsp.getResponse();
80 if (response instanceof Replicator.GetSuccess) {
81 return doInitialSync((Replicator.GetSuccess<ORMap<DOMEntity, ORSet<String>>>) response);
82 } else if (response instanceof Replicator.NotFound) {
83 LOG.debug("No candidates found switching to supervisor");
84 return switchToSupervisor();
86 LOG.debug("Initial candidate sync failed, switching to supervisor. Sync reply: {}", response);
87 return switchToSupervisor();
91 private Behavior<OwnerSupervisorCommand> doInitialSync(
92 final Replicator.GetSuccess<ORMap<DOMEntity, ORSet<String>>> response) {
94 final ORMap<DOMEntity, ORSet<String>> candidates = response.get(CandidateRegistry.KEY);
95 candidates.getEntries().entrySet().forEach(entry -> {
96 currentCandidates.put(entry.getKey(), new HashSet<>(entry.getValue().getElements()));
99 toSync = candidates.keys().size();
100 for (final DOMEntity entity : candidates.keys().getElements()) {
101 entityLookup.put(entity.toString(), entity);
103 ownerReplicator.askGet(
104 askReplyTo -> new Replicator.Get<>(
105 new LWWRegisterKey<>(entity.toString()),
106 Replicator.readLocal(),
108 InitialOwnerSync::new);
114 private Behavior<OwnerSupervisorCommand> onInitialOwnerSync(final InitialOwnerSync rsp) {
115 final Replicator.GetResponse<LWWRegister<String>> response = rsp.getResponse();
116 if (response instanceof Replicator.GetSuccess) {
117 handleOwnerRsp((Replicator.GetSuccess<LWWRegister<String>>) response);
118 } else if (response instanceof Replicator.NotFound) {
119 handleNotFoundOwnerRsp((Replicator.NotFound<LWWRegister<String>>) response);
121 LOG.debug("Initial sync failed response: {}", response);
124 // count the responses, on last switch behaviors
127 return switchToSupervisor();
133 private Behavior<OwnerSupervisorCommand> switchToSupervisor() {
134 LOG.debug("Initial sync done, switching to supervisor. candidates: {}, owners: {}",
135 currentCandidates, currentOwners);
136 return Behaviors.setup(ctx ->
137 OwnerSupervisor.create(currentCandidates, currentOwners));
140 private void handleOwnerRsp(final Replicator.GetSuccess<LWWRegister<String>> rsp) {
141 final DOMEntity entity = entityLookup.get(rsp.key().id());
142 final String owner = rsp.get(rsp.key()).getValue();
144 currentOwners.put(entity, owner);
147 private static void handleNotFoundOwnerRsp(final Replicator.NotFound<LWWRegister<String>> rsp) {
148 LOG.debug("Owner not found. {}", rsp);