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.Behavior;
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.Member;
17 import akka.cluster.typed.Cluster;
18 import akka.pattern.StatusReply;
19 import org.opendaylight.controller.eos.akka.owner.supervisor.command.ActivateDataCenter;
20 import org.opendaylight.controller.eos.akka.owner.supervisor.command.ClearCandidates;
21 import org.opendaylight.controller.eos.akka.owner.supervisor.command.ClearCandidatesForMember;
22 import org.opendaylight.controller.eos.akka.owner.supervisor.command.GetEntitiesBackendRequest;
23 import org.opendaylight.controller.eos.akka.owner.supervisor.command.GetEntityBackendRequest;
24 import org.opendaylight.controller.eos.akka.owner.supervisor.command.GetEntityOwnerBackendRequest;
25 import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorCommand;
26 import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorRequest;
27 import org.opendaylight.mdsal.binding.dom.codec.api.BindingInstanceIdentifierCodec;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
32 * Initial Supervisor behavior that stays idle and only switches itself to the active behavior when its running
33 * in the primary datacenter, or is activated on demand. Once the supervisor instance is no longer needed in the
34 * secondary datacenter it needs to be deactivated manually.
36 public final class IdleSupervisor extends AbstractSupervisor {
37 private static final Logger LOG = LoggerFactory.getLogger(IdleSupervisor.class);
39 private static final String DATACENTER_PREFIX = "dc-";
40 private static final String DEFAULT_DATACENTER = "dc-default";
42 private final BindingInstanceIdentifierCodec iidCodec;
44 private IdleSupervisor(final ActorContext<OwnerSupervisorCommand> context,
45 final BindingInstanceIdentifierCodec iidCodec) {
47 this.iidCodec = requireNonNull(iidCodec);
48 final Cluster cluster = Cluster.get(context.getSystem());
50 final String datacenterRole = extractDatacenterRole(cluster.selfMember());
51 if (datacenterRole.equals(DEFAULT_DATACENTER)) {
52 LOG.debug("No datacenter configured, activating default data center");
53 context.getSelf().tell(new ActivateDataCenter(null));
56 LOG.debug("Idle supervisor started on {}.", cluster.selfMember());
59 public static Behavior<OwnerSupervisorCommand> create(final BindingInstanceIdentifierCodec iidCodec) {
60 return Behaviors.setup(context -> new IdleSupervisor(context, iidCodec));
64 public Receive<OwnerSupervisorCommand> createReceive() {
65 return newReceiveBuilder()
66 .onMessage(ActivateDataCenter.class, this::onActivateDataCenter)
67 .onMessage(GetEntitiesBackendRequest.class, this::onFailEntityRpc)
68 .onMessage(GetEntityBackendRequest.class, this::onFailEntityRpc)
69 .onMessage(GetEntityOwnerBackendRequest.class, this::onFailEntityRpc)
70 .onMessage(ClearCandidatesForMember.class, this::onClearCandidatesForMember)
71 .onMessage(ClearCandidates.class, this::finishClearCandidates)
75 private Behavior<OwnerSupervisorCommand> onFailEntityRpc(final OwnerSupervisorRequest message) {
76 LOG.debug("Failing rpc request. {}", message);
77 message.getReplyTo().tell(StatusReply.error("OwnerSupervisor is inactive so it"
78 + " cannot handle entity rpc requests."));
82 private Behavior<OwnerSupervisorCommand> onActivateDataCenter(final ActivateDataCenter message) {
83 LOG.debug("Received ActivateDataCenter command switching to syncer behavior,");
84 return OwnerSyncer.create(message.getReplyTo(), iidCodec);
87 private static String extractDatacenterRole(final Member selfMember) {
88 return selfMember.getRoles().stream()
89 .filter(role -> role.startsWith(DATACENTER_PREFIX))
91 .orElseThrow(() -> new IllegalArgumentException(selfMember + " does not have a valid role"));