opendaylight/md-sal/eos-dom-akka/src/main/java/org/opendaylight/controller/eos/akka/registry/candidate/CandidateRegistryInit.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.registry.candidate;
   9
  10 import akka.actor.typed.ActorRef;
  11 import akka.actor.typed.Behavior;
  12 import akka.actor.typed.javadsl.AbstractBehavior;
  13 import akka.actor.typed.javadsl.ActorContext;
  14 import akka.actor.typed.javadsl.Behaviors;
  15 import akka.actor.typed.javadsl.Receive;
  16 import akka.actor.typed.javadsl.StashBuffer;
  17 import akka.cluster.Cluster;
  18 import java.time.Duration;
  19 import java.util.Set;
  20 import org.opendaylight.controller.eos.akka.owner.supervisor.command.ClearCandidatesForMember;
  21 import org.opendaylight.controller.eos.akka.owner.supervisor.command.ClearCandidatesResponse;
  22 import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorCommand;
  23 import org.opendaylight.controller.eos.akka.registry.candidate.command.CandidateRegistryCommand;
  24 import org.opendaylight.controller.eos.akka.registry.candidate.command.CandidateRemovalFailed;
  25 import org.opendaylight.controller.eos.akka.registry.candidate.command.CandidateRemovalFinished;
  26 import org.opendaylight.controller.eos.akka.registry.candidate.command.RegisterCandidate;
  27 import org.opendaylight.controller.eos.akka.registry.candidate.command.RemovePreviousCandidates;
  28 import org.opendaylight.controller.eos.akka.registry.candidate.command.UnregisterCandidate;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 public class CandidateRegistryInit extends AbstractBehavior<CandidateRegistryCommand> {
  33
  34     private static final Logger LOG = LoggerFactory.getLogger(CandidateRegistryInit.class);
  35
  36     private static final String DATACENTER_PREFIX = "dc-";
  37
  38     private final StashBuffer<CandidateRegistryCommand> stash;
  39     private final ActorRef<OwnerSupervisorCommand> ownerSupervisor;
  40     private final String selfRole;
  41
  42     public CandidateRegistryInit(final ActorContext<CandidateRegistryCommand> ctx,
  43                                  final StashBuffer<CandidateRegistryCommand> stash,
  44                                  final ActorRef<OwnerSupervisorCommand> ownerSupervisor) {
  45         super(ctx);
  46         this.stash = stash;
  47         this.ownerSupervisor = ownerSupervisor;
  48         this.selfRole = extractRole(Cluster.get(ctx.getSystem()).selfMember().getRoles());
  49
  50         ctx.getSelf().tell(new RemovePreviousCandidates());
  51
  52         LOG.debug("{} : CandidateRegistry syncing behavior started.", selfRole);
  53     }
  54
  55     public static Behavior<CandidateRegistryCommand> create(final ActorRef<OwnerSupervisorCommand> ownerSupervisor) {
  56         return Behaviors.withStash(100,
  57                 stash ->
  58                         Behaviors.setup(ctx -> new CandidateRegistryInit(ctx, stash, ownerSupervisor)));
  59     }
  60
  61     @Override
  62     public Receive<CandidateRegistryCommand> createReceive() {
  63         return newReceiveBuilder()
  64                 .onMessage(RemovePreviousCandidates.class, this::onRemoveCandidates)
  65                 .onMessage(CandidateRemovalFinished.class, command -> switchToCandidateRegistry())
  66                 .onMessage(CandidateRemovalFailed.class, this::candidateRemovalFailed)
  67                 .onMessage(RegisterCandidate.class, this::stashCommand)
  68                 .onMessage(UnregisterCandidate.class, this::stashCommand)
  69                 .build();
  70     }
  71
  72     private Behavior<CandidateRegistryCommand> candidateRemovalFailed(final CandidateRemovalFailed command) {
  73         LOG.warn("{} : Initial removal of candidates from previous iteration failed. Rescheduling.", selfRole,
  74                 command.getThrowable());
  75         getContext().getSelf().tell(new RemovePreviousCandidates());
  76         return this;
  77     }
  78
  79     private Behavior<CandidateRegistryCommand> onRemoveCandidates(final RemovePreviousCandidates command) {
  80         LOG.debug("Sending RemovePreviousCandidates.");
  81         getContext().ask(ClearCandidatesResponse.class,
  82                 ownerSupervisor, Duration.ofSeconds(5),
  83                 ref -> new ClearCandidatesForMember(ref, selfRole),
  84                 (response, throwable) -> {
  85                     if (response != null) {
  86                         return new CandidateRemovalFinished();
  87                     } else {
  88                         return new CandidateRemovalFailed(throwable);
  89                     }
  90                 });
  91
  92         return this;
  93     }
  94
  95     private Behavior<CandidateRegistryCommand> stashCommand(final CandidateRegistryCommand command) {
  96         LOG.debug("Stashing {}", command);
  97         stash.stash(command);
  98         return this;
  99     }
 100
 101     private Behavior<CandidateRegistryCommand> switchToCandidateRegistry() {
 102         LOG.debug("{} : Clearing of candidates from previous instance done, switching to CandidateRegistry.", selfRole);
 103         return stash.unstashAll(CandidateRegistry.create());
 104     }
 105
 106     private static String extractRole(final Set<String> roles) {
 107         return roles.stream().filter(role -> !role.contains(DATACENTER_PREFIX))
 108                 .findFirst().orElseThrow(() -> new IllegalArgumentException("No valid role found."));
 109     }
 110 }