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org.opendaylight.controller.eos.akka.AkkaEntityOwnershipService Maven / Gradle / Ivy
/*
* Copyright (c) 2021 PANTHEON.tech, s.r.o. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.controller.eos.akka;
import akka.actor.ActorSystem;
import akka.actor.typed.ActorRef;
import akka.actor.typed.Scheduler;
import akka.actor.typed.javadsl.Adapter;
import akka.actor.typed.javadsl.AskPattern;
import akka.actor.typed.javadsl.Behaviors;
import akka.cluster.typed.Cluster;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import java.time.Duration;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.function.Function;
import javax.annotation.PreDestroy;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.opendaylight.controller.cluster.ActorSystemProvider;
import org.opendaylight.controller.eos.akka.bootstrap.EOSMain;
import org.opendaylight.controller.eos.akka.bootstrap.command.BootstrapCommand;
import org.opendaylight.controller.eos.akka.bootstrap.command.GetRunningContext;
import org.opendaylight.controller.eos.akka.bootstrap.command.RunningContext;
import org.opendaylight.controller.eos.akka.bootstrap.command.Terminate;
import org.opendaylight.controller.eos.akka.owner.checker.command.GetEntitiesRequest;
import org.opendaylight.controller.eos.akka.owner.checker.command.GetEntityOwnerReply;
import org.opendaylight.controller.eos.akka.owner.checker.command.GetEntityOwnerRequest;
import org.opendaylight.controller.eos.akka.owner.checker.command.GetEntityReply;
import org.opendaylight.controller.eos.akka.owner.checker.command.GetEntityRequest;
import org.opendaylight.controller.eos.akka.owner.checker.command.GetOwnershipState;
import org.opendaylight.controller.eos.akka.owner.checker.command.GetOwnershipStateReply;
import org.opendaylight.controller.eos.akka.owner.checker.command.StateCheckerCommand;
import org.opendaylight.controller.eos.akka.owner.checker.command.StateCheckerReply;
import org.opendaylight.controller.eos.akka.owner.supervisor.command.ActivateDataCenter;
import org.opendaylight.controller.eos.akka.owner.supervisor.command.DeactivateDataCenter;
import org.opendaylight.controller.eos.akka.owner.supervisor.command.OwnerSupervisorCommand;
import org.opendaylight.controller.eos.akka.registry.candidate.command.CandidateRegistryCommand;
import org.opendaylight.controller.eos.akka.registry.candidate.command.RegisterCandidate;
import org.opendaylight.controller.eos.akka.registry.candidate.command.UnregisterCandidate;
import org.opendaylight.controller.eos.akka.registry.listener.type.command.RegisterListener;
import org.opendaylight.controller.eos.akka.registry.listener.type.command.TypeListenerRegistryCommand;
import org.opendaylight.controller.eos.akka.registry.listener.type.command.UnregisterListener;
import org.opendaylight.mdsal.binding.api.RpcProviderService;
import org.opendaylight.mdsal.binding.dom.codec.api.BindingCodecTree;
import org.opendaylight.mdsal.binding.dom.codec.api.BindingInstanceIdentifierCodec;
import org.opendaylight.mdsal.eos.common.api.CandidateAlreadyRegisteredException;
import org.opendaylight.mdsal.eos.common.api.EntityOwnershipState;
import org.opendaylight.mdsal.eos.dom.api.DOMEntity;
import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipListener;
import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipService;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.entity.owners.norev.GetEntities;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.entity.owners.norev.GetEntitiesInput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.entity.owners.norev.GetEntitiesOutput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.entity.owners.norev.GetEntity;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.entity.owners.norev.GetEntityInput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.entity.owners.norev.GetEntityOutput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.entity.owners.norev.GetEntityOwner;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.entity.owners.norev.GetEntityOwnerInput;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.entity.owners.norev.GetEntityOwnerOutput;
import org.opendaylight.yangtools.concepts.Registration;
import org.opendaylight.yangtools.yang.binding.RpcOutput;
import org.opendaylight.yangtools.yang.common.Empty;
import org.opendaylight.yangtools.yang.common.RpcResult;
import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Deactivate;
import org.osgi.service.component.annotations.Reference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* DOMEntityOwnershipService implementation backed by native Akka clustering constructs. We use distributed-data
* to track all registered candidates and cluster-singleton to maintain a single cluster-wide authority which selects
* the appropriate owners.
*/
@Singleton
@Component(immediate = true, service = { DOMEntityOwnershipService.class, DataCenterControl.class })
public class AkkaEntityOwnershipService implements DOMEntityOwnershipService, DataCenterControl, AutoCloseable {
private static final Logger LOG = LoggerFactory.getLogger(AkkaEntityOwnershipService.class);
private static final String DATACENTER_PREFIX = "dc";
private static final Duration DATACENTER_OP_TIMEOUT = Duration.ofSeconds(20);
private static final Duration QUERY_TIMEOUT = Duration.ofSeconds(10);
private final Set registeredEntities = ConcurrentHashMap.newKeySet();
private final String localCandidate;
private final Scheduler scheduler;
private final String datacenter;
private final ActorRef bootstrap;
private final RunningContext runningContext;
private final ActorRef candidateRegistry;
private final ActorRef listenerRegistry;
private final ActorRef ownerStateChecker;
protected final ActorRef ownerSupervisor;
private final BindingInstanceIdentifierCodec iidCodec;
private Registration reg;
@VisibleForTesting
protected AkkaEntityOwnershipService(final ActorSystem actorSystem, final BindingCodecTree codecTree)
throws ExecutionException, InterruptedException {
final var typedActorSystem = Adapter.toTyped(actorSystem);
scheduler = typedActorSystem.scheduler();
final Cluster cluster = Cluster.get(typedActorSystem);
datacenter = cluster.selfMember().dataCenter();
localCandidate = cluster.selfMember().getRoles().stream()
.filter(role -> !role.contains(DATACENTER_PREFIX))
.findFirst()
.orElseThrow(() -> new IllegalArgumentException("No valid role found."));
iidCodec = codecTree.getInstanceIdentifierCodec();
bootstrap = Adapter.spawn(actorSystem, Behaviors.setup(
context -> EOSMain.create(iidCodec)), "EOSBootstrap");
final CompletionStage ask = AskPattern.ask(bootstrap,
GetRunningContext::new, Duration.ofSeconds(5), scheduler);
runningContext = ask.toCompletableFuture().get();
candidateRegistry = runningContext.getCandidateRegistry();
listenerRegistry = runningContext.getListenerRegistry();
ownerStateChecker = runningContext.getOwnerStateChecker();
ownerSupervisor = runningContext.getOwnerSupervisor();
}
@Inject
@Activate
@SuppressFBWarnings(value = "MC_OVERRIDABLE_METHOD_CALL_IN_CONSTRUCTOR",
justification = "Non-final for testing 'this' reference is expected to be stable at registration time")
public AkkaEntityOwnershipService(@Reference final ActorSystemProvider actorProvider,
@Reference final RpcProviderService rpcProvider, @Reference final BindingCodecTree codecTree)
throws ExecutionException, InterruptedException {
this(actorProvider.getActorSystem(), codecTree);
reg = rpcProvider.registerRpcImplementations(
(GetEntity) this::getEntity,
(GetEntities) this::getEntities,
(GetEntityOwner) this::getEntityOwner);
}
@PreDestroy
@Deactivate
@Override
public void close() throws InterruptedException, ExecutionException {
if (reg != null) {
reg.close();
reg = null;
}
AskPattern.ask(bootstrap, Terminate::new, Duration.ofSeconds(5), scheduler).toCompletableFuture().get();
}
@Override
public Registration registerCandidate(final DOMEntity entity)
throws CandidateAlreadyRegisteredException {
if (!registeredEntities.add(entity)) {
throw new CandidateAlreadyRegisteredException(entity);
}
final RegisterCandidate msg = new RegisterCandidate(entity, localCandidate);
LOG.debug("Registering candidate with message: {}", msg);
candidateRegistry.tell(msg);
return new CandidateRegistration(entity, this);
}
@Override
public Registration registerListener(final String entityType, final DOMEntityOwnershipListener listener) {
LOG.debug("Registering listener {} for type {}", listener, entityType);
listenerRegistry.tell(new RegisterListener(entityType, listener));
return new ListenerRegistration(listener, entityType, this);
}
@Override
public Optional getOwnershipState(final DOMEntity entity) {
LOG.debug("Retrieving ownership state for {}", entity);
final CompletionStage result = AskPattern.ask(ownerStateChecker,
replyTo -> new GetOwnershipState(entity, replyTo),
Duration.ofSeconds(5), scheduler);
final GetOwnershipStateReply reply;
try {
reply = result.toCompletableFuture().get();
} catch (final InterruptedException | ExecutionException exception) {
LOG.warn("Failed to retrieve ownership state for {}", entity, exception);
return Optional.empty();
}
return Optional.ofNullable(reply.getOwnershipState());
}
@Override
public boolean isCandidateRegistered(final DOMEntity forEntity) {
return registeredEntities.contains(forEntity);
}
@Override
public ListenableFuture activateDataCenter() {
LOG.debug("Activating datacenter: {}", datacenter);
return toListenableFuture("Activate",
AskPattern.ask(ownerSupervisor, ActivateDataCenter::new, DATACENTER_OP_TIMEOUT, scheduler));
}
@Override
public ListenableFuture deactivateDataCenter() {
LOG.debug("Deactivating datacenter: {}", datacenter);
return toListenableFuture("Deactivate",
AskPattern.ask(ownerSupervisor, DeactivateDataCenter::new, DATACENTER_OP_TIMEOUT, scheduler));
}
@VisibleForTesting
final ListenableFuture> getEntities(final GetEntitiesInput input) {
return toRpcFuture(AskPattern.ask(ownerStateChecker, GetEntitiesRequest::new, QUERY_TIMEOUT, scheduler),
reply -> reply.toOutput(iidCodec));
}
@VisibleForTesting
final ListenableFuture> getEntity(final GetEntityInput input) {
return toRpcFuture(AskPattern.ask(ownerStateChecker,
(final ActorRef replyTo) -> new GetEntityRequest(replyTo, input), QUERY_TIMEOUT, scheduler),
GetEntityReply::toOutput);
}
@VisibleForTesting
final ListenableFuture> getEntityOwner(final GetEntityOwnerInput input) {
return toRpcFuture(AskPattern.ask(ownerStateChecker,
(final ActorRef replyTo) -> new GetEntityOwnerRequest(replyTo, input), QUERY_TIMEOUT,
scheduler), GetEntityOwnerReply::toOutput);
}
void unregisterCandidate(final DOMEntity entity) {
LOG.debug("Unregistering candidate for {}", entity);
if (registeredEntities.remove(entity)) {
candidateRegistry.tell(new UnregisterCandidate(entity, localCandidate));
}
}
void unregisterListener(final String entityType, final DOMEntityOwnershipListener listener) {
LOG.debug("Unregistering listener {} for type {}", listener, entityType);
listenerRegistry.tell(new UnregisterListener(entityType, listener));
}
@VisibleForTesting
RunningContext getRunningContext() {
return runningContext;
}
private static ListenableFuture> toRpcFuture(
final CompletionStage stage, final Function outputFunction) {
final SettableFuture> future = SettableFuture.create();
stage.whenComplete((reply, failure) -> {
if (failure != null) {
future.setException(failure);
} else {
future.set(RpcResultBuilder.success(outputFunction.apply(reply)).build());
}
});
return future;
}
private static ListenableFuture toListenableFuture(final String op, final CompletionStage stage) {
final SettableFuture future = SettableFuture.create();
stage.whenComplete((reply, failure) -> {
if (failure != null) {
LOG.warn("{} DataCenter failed", op, failure);
future.setException(failure);
} else {
LOG.debug("{} DataCenter successful", op);
future.set(Empty.value());
}
});
return future;
}
}
