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