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 akka.pattern.StatusReply;
  20 import org.opendaylight.controller.eos.akka.owner.supervisor.command.ActivateDataCenter;
  21 import org.opendaylight.controller.eos.akka.owner.supervisor.command.GetEntitiesBackendRequest;
  22 import org.opendaylight.controller.eos.akka.owner.supervisor.command.GetEntityBackendRequest;
  23 import org.opendaylight.controller.eos.akka.owner.supervisor.command.GetEntityOwnerBackendRequest;
  24 import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorCommand;
  25 import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorRequest;
  26 import org.opendaylight.mdsal.binding.dom.codec.api.BindingInstanceIdentifierCodec;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 /**
  31  * Initial Supervisor behavior that stays idle and only switches itself to the active behavior when its running
  32  * in the primary datacenter, or is activated on demand. Once the supervisor instance is no longer needed in the
  33  * secondary datacenter it needs to be deactivated manually.
  34  */
  35 public final class IdleSupervisor extends AbstractBehavior<OwnerSupervisorCommand> {
  36     private static final Logger LOG = LoggerFactory.getLogger(IdleSupervisor.class);
  37
  38     private static final String DATACENTER_PREFIX = "dc-";
  39     private static final String DEFAULT_DATACENTER = "dc-default";
  40
  41     private final BindingInstanceIdentifierCodec iidCodec;
  42
  43     private IdleSupervisor(final ActorContext<OwnerSupervisorCommand> context,
  44                            final BindingInstanceIdentifierCodec iidCodec) {
  45         super(context);
  46         this.iidCodec = requireNonNull(iidCodec);
  47         final Cluster cluster = Cluster.get(context.getSystem());
  48
  49         final String datacenterRole = extractDatacenterRole(cluster.selfMember());
  50         if (datacenterRole.equals(DEFAULT_DATACENTER)) {
  51             LOG.debug("No datacenter configured, activating default data center");
  52             context.getSelf().tell(new ActivateDataCenter(null));
  53         }
  54
  55         LOG.debug("Idle supervisor started on {}.", cluster.selfMember());
  56     }
  57
  58     public static Behavior<OwnerSupervisorCommand> create(final BindingInstanceIdentifierCodec iidCodec) {
  59
  60         return Behaviors.setup(context -> new IdleSupervisor(context, iidCodec));
  61     }
  62
  63     @Override
  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                 .build();
  71     }
  72
  73     private Behavior<OwnerSupervisorCommand> onFailEntityRpc(final OwnerSupervisorRequest message) {
  74         LOG.debug("Failing rpc request. {}", message);
  75         message.getReplyTo().tell(StatusReply.error("OwnerSupervisor is inactive so it"
  76                 + " cannot handle entity rpc requests."));
  77         return this;
  78     }
  79
  80     private Behavior<OwnerSupervisorCommand> onActivateDataCenter(final ActivateDataCenter message) {
  81         LOG.debug("Received ActivateDataCenter command switching to syncer behavior,");
  82         return OwnerSyncer.create(message.getReplyTo(), iidCodec);
  83     }
  84
  85     private String extractDatacenterRole(final Member selfMember) {
  86         return selfMember.getRoles().stream()
  87                 .filter(role -> role.startsWith(DATACENTER_PREFIX))
  88                 .findFirst()
  89                 .orElseThrow(() -> new IllegalArgumentException(selfMember + " does not have a valid role"));
  90     }
  91 }