opendaylight/md-sal/eos-dom-akka/src/main/java/org/opendaylight/controller/eos/akka/owner/supervisor/IdleSupervisor.java

   1 /*
   2  * Copyright (c) 2021 PANTHEON.tech, s.r.o. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.controller.eos.akka.owner.supervisor;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import akka.actor.typed.Behavior;
  13 import akka.actor.typed.javadsl.AbstractBehavior;
  14 import akka.actor.typed.javadsl.ActorContext;
  15 import akka.actor.typed.javadsl.Behaviors;
  16 import akka.actor.typed.javadsl.Receive;
  17 import akka.cluster.Member;
  18 import akka.cluster.typed.Cluster;
  19 import org.opendaylight.controller.eos.akka.owner.supervisor.command.ActivateDataCenter;
  20 import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorCommand;
  21 import org.opendaylight.mdsal.binding.dom.codec.api.BindingInstanceIdentifierCodec;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 /**
  26  * Initial Supervisor behavior that stays idle and only switches itself to the active behavior when its running
  27  * in the primary datacenter, or is activated on demand. Once the supervisor instance is no longer needed in the
  28  * secondary datacenter it needs to be deactivated manually.
  29  */
  30 public final class IdleSupervisor extends AbstractBehavior<OwnerSupervisorCommand> {
  31     private static final Logger LOG = LoggerFactory.getLogger(IdleSupervisor.class);
  32
  33     private static final String DATACENTER_PREFIX = "dc-";
  34     private static final String DEFAULT_DATACENTER = "dc-default";
  35
  36     private final BindingInstanceIdentifierCodec iidCodec;
  37
  38     private IdleSupervisor(final ActorContext<OwnerSupervisorCommand> context,
  39                            final BindingInstanceIdentifierCodec iidCodec) {
  40         super(context);
  41         this.iidCodec = requireNonNull(iidCodec);
  42         final Cluster cluster = Cluster.get(context.getSystem());
  43
  44         final String datacenterRole = extractDatacenterRole(cluster.selfMember());
  45         if (datacenterRole.equals(DEFAULT_DATACENTER)) {
  46             LOG.debug("No datacenter configured, activating default data center");
  47             context.getSelf().tell(new ActivateDataCenter(null));
  48         }
  49
  50         LOG.debug("Idle supervisor started on {}.", cluster.selfMember());
  51     }
  52
  53     public static Behavior<OwnerSupervisorCommand> create(final BindingInstanceIdentifierCodec iidCodec) {
  54
  55         return Behaviors.setup(context -> new IdleSupervisor(context, iidCodec));
  56     }
  57
  58     @Override
  59     public Receive<OwnerSupervisorCommand> createReceive() {
  60         return newReceiveBuilder()
  61                 .onMessage(ActivateDataCenter.class, this::onActivateDataCenter)
  62                 .build();
  63     }
  64
  65     private Behavior<OwnerSupervisorCommand> onActivateDataCenter(final ActivateDataCenter message) {
  66         LOG.debug("Received ActivateDataCenter command switching to syncer behavior,");
  67         return OwnerSyncer.create(message.getReplyTo(), iidCodec);
  68     }
  69
  70     private String extractDatacenterRole(final Member selfMember) {
  71         return selfMember.getRoles().stream()
  72                 .filter(role -> role.startsWith(DATACENTER_PREFIX))
  73                 .findFirst()
  74                 .orElseThrow(() -> new IllegalArgumentException(selfMember + " does not have a valid role"));
  75     }
  76 }