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 static java.util.Objects.requireNonNull;
12 import akka.actor.typed.ActorRef;
13 import akka.actor.typed.Behavior;
14 import akka.actor.typed.javadsl.AbstractBehavior;
15 import akka.actor.typed.javadsl.ActorContext;
16 import akka.actor.typed.javadsl.Behaviors;
17 import akka.actor.typed.javadsl.Receive;
18 import akka.cluster.ddata.LWWRegister;
19 import akka.cluster.ddata.LWWRegisterKey;
20 import akka.cluster.ddata.ORMap;
21 import akka.cluster.ddata.ORSet;
22 import akka.cluster.ddata.typed.javadsl.DistributedData;
23 import akka.cluster.ddata.typed.javadsl.Replicator;
24 import akka.cluster.ddata.typed.javadsl.ReplicatorMessageAdapter;
25 import java.time.Duration;
26 import java.util.HashMap;
27 import java.util.HashSet;
30 import org.eclipse.jdt.annotation.Nullable;
31 import org.opendaylight.controller.eos.akka.owner.supervisor.command.DataCenterActivated;
32 import org.opendaylight.controller.eos.akka.owner.supervisor.command.InitialCandidateSync;
33 import org.opendaylight.controller.eos.akka.owner.supervisor.command.InitialOwnerSync;
34 import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorCommand;
35 import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorReply;
36 import org.opendaylight.controller.eos.akka.registry.candidate.CandidateRegistry;
37 import org.opendaylight.mdsal.binding.dom.codec.api.BindingInstanceIdentifierCodec;
38 import org.opendaylight.mdsal.eos.dom.api.DOMEntity;
39 import org.slf4j.Logger;
40 import org.slf4j.LoggerFactory;
43 * Behavior that retrieves current candidates/owners from distributed-data and switches to OwnerSupervisor when the
46 public final class OwnerSyncer extends AbstractBehavior<OwnerSupervisorCommand> {
47 private static final Logger LOG = LoggerFactory.getLogger(OwnerSyncer.class);
49 private final ReplicatorMessageAdapter<OwnerSupervisorCommand, LWWRegister<String>> ownerReplicator;
50 private final Map<DOMEntity, Set<String>> currentCandidates = new HashMap<>();
51 private final Map<DOMEntity, String> currentOwners = new HashMap<>();
53 // String representation of Entity to DOMEntity
54 private final Map<String, DOMEntity> entityLookup = new HashMap<>();
55 private final BindingInstanceIdentifierCodec iidCodec;
57 private int toSync = -1;
59 private OwnerSyncer(final ActorContext<OwnerSupervisorCommand> context,
60 final @Nullable ActorRef<OwnerSupervisorReply> notifyDatacenterStarted,
61 final BindingInstanceIdentifierCodec iidCodec) {
63 this.iidCodec = requireNonNull(iidCodec);
64 LOG.debug("Starting candidate and owner sync");
66 final ActorRef<Replicator.Command> replicator = DistributedData.get(context.getSystem()).replicator();
68 ownerReplicator = new ReplicatorMessageAdapter<>(context, replicator, Duration.ofSeconds(5));
70 new ReplicatorMessageAdapter<OwnerSupervisorCommand, ORMap<DOMEntity, ORSet<String>>>(context, replicator,
71 Duration.ofSeconds(5)).askGet(
72 askReplyTo -> new Replicator.Get<>(CandidateRegistry.KEY, Replicator.readLocal(), askReplyTo),
73 InitialCandidateSync::new);
75 if (notifyDatacenterStarted != null) {
76 notifyDatacenterStarted.tell(DataCenterActivated.INSTANCE);
80 public static Behavior<OwnerSupervisorCommand> create(final ActorRef<OwnerSupervisorReply> notifyDatacenterStarted,
81 final BindingInstanceIdentifierCodec iidCodec) {
82 return Behaviors.setup(ctx -> new OwnerSyncer(ctx, notifyDatacenterStarted, iidCodec));
86 public Receive<OwnerSupervisorCommand> createReceive() {
87 return newReceiveBuilder()
88 .onMessage(InitialCandidateSync.class, this::onInitialCandidateSync)
89 .onMessage(InitialOwnerSync.class, this::onInitialOwnerSync)
93 private Behavior<OwnerSupervisorCommand> onInitialCandidateSync(final InitialCandidateSync rsp) {
94 final Replicator.GetResponse<ORMap<DOMEntity, ORSet<String>>> response = rsp.getResponse();
95 if (response instanceof Replicator.GetSuccess) {
96 return doInitialSync((Replicator.GetSuccess<ORMap<DOMEntity, ORSet<String>>>) response);
97 } else if (response instanceof Replicator.NotFound) {
98 LOG.debug("No candidates found switching to supervisor");
99 return switchToSupervisor();
101 LOG.debug("Initial candidate sync failed, switching to supervisor. Sync reply: {}", response);
102 return switchToSupervisor();
106 private Behavior<OwnerSupervisorCommand> doInitialSync(
107 final Replicator.GetSuccess<ORMap<DOMEntity, ORSet<String>>> response) {
109 final ORMap<DOMEntity, ORSet<String>> candidates = response.get(CandidateRegistry.KEY);
110 candidates.getEntries().entrySet().forEach(entry -> {
111 currentCandidates.put(entry.getKey(), new HashSet<>(entry.getValue().getElements()));
114 toSync = candidates.keys().size();
115 for (final DOMEntity entity : candidates.keys().getElements()) {
116 entityLookup.put(entity.toString(), entity);
118 ownerReplicator.askGet(
119 askReplyTo -> new Replicator.Get<>(
120 new LWWRegisterKey<>(entity.toString()),
121 Replicator.readLocal(),
123 InitialOwnerSync::new);
129 private Behavior<OwnerSupervisorCommand> onInitialOwnerSync(final InitialOwnerSync rsp) {
130 final Replicator.GetResponse<LWWRegister<String>> response = rsp.getResponse();
131 if (response instanceof Replicator.GetSuccess) {
132 handleOwnerRsp((Replicator.GetSuccess<LWWRegister<String>>) response);
133 } else if (response instanceof Replicator.NotFound) {
134 handleNotFoundOwnerRsp((Replicator.NotFound<LWWRegister<String>>) response);
136 LOG.debug("Initial sync failed response: {}", response);
139 // count the responses, on last switch behaviors
142 return switchToSupervisor();
148 private Behavior<OwnerSupervisorCommand> switchToSupervisor() {
149 LOG.debug("Initial sync done, switching to supervisor. candidates: {}, owners: {}",
150 currentCandidates, currentOwners);
151 return Behaviors.setup(ctx -> OwnerSupervisor.create(currentCandidates, currentOwners, iidCodec));
154 private void handleOwnerRsp(final Replicator.GetSuccess<LWWRegister<String>> rsp) {
155 final DOMEntity entity = entityLookup.get(rsp.key().id());
156 final String owner = rsp.get(rsp.key()).getValue();
158 currentOwners.put(entity, owner);
161 private static void handleNotFoundOwnerRsp(final Replicator.NotFound<LWWRegister<String>> rsp) {
162 LOG.debug("Owner not found. {}", rsp);