org.opendaylight.controller.remote.rpc.OpsRegistrar Maven / Gradle / Ivy
/*
* Copyright (c) 2017 Cisco Systems, Inc. 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.remote.rpc;
import static java.util.Objects.requireNonNull;
import akka.actor.Address;
import akka.actor.Props;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor;
import org.opendaylight.controller.remote.rpc.registry.ActionRegistry.Messages.UpdateRemoteActionEndpoints;
import org.opendaylight.controller.remote.rpc.registry.ActionRegistry.RemoteActionEndpoint;
import org.opendaylight.controller.remote.rpc.registry.RpcRegistry.Messages.UpdateRemoteEndpoints;
import org.opendaylight.controller.remote.rpc.registry.RpcRegistry.RemoteRpcEndpoint;
import org.opendaylight.mdsal.dom.api.DOMActionProviderService;
import org.opendaylight.mdsal.dom.api.DOMRpcProviderService;
import org.opendaylight.yangtools.concepts.Registration;
/**
* Actor handling registration of RPCs and Actions available on remote nodes with the local
* {@link DOMRpcProviderService} and {@link DOMActionProviderService}.
*/
final class OpsRegistrar extends AbstractUntypedActor {
private final Map rpcRegs = new HashMap<>();
private final Map actionRegs = new HashMap<>();
private final DOMRpcProviderService rpcProviderService;
private final RemoteOpsProviderConfig config;
private final DOMActionProviderService actionProviderService;
OpsRegistrar(final RemoteOpsProviderConfig config, final DOMRpcProviderService rpcProviderService,
final DOMActionProviderService actionProviderService) {
this.config = requireNonNull(config);
this.rpcProviderService = requireNonNull(rpcProviderService);
this.actionProviderService = requireNonNull(actionProviderService);
}
public static Props props(final RemoteOpsProviderConfig config, final DOMRpcProviderService rpcProviderService,
final DOMActionProviderService actionProviderService) {
return Props.create(OpsRegistrar.class, requireNonNull(config),
requireNonNull(rpcProviderService, "DOMRpcProviderService cannot be null"),
requireNonNull(actionProviderService, "DOMActionProviderService cannot be null"));
}
@Override
public void postStop() throws Exception {
rpcRegs.values().forEach(Registration::close);
rpcRegs.clear();
actionRegs.values().forEach(Registration::close);
actionRegs.clear();
super.postStop();
}
@Override
protected void handleReceive(final Object message) {
if (message instanceof UpdateRemoteEndpoints updateEndpoints) {
LOG.debug("Handling updateRemoteEndpoints message");
updateRemoteRpcEndpoints(updateEndpoints.getRpcEndpoints());
} else if (message instanceof UpdateRemoteActionEndpoints updateEndpoints) {
LOG.debug("Handling updateRemoteActionEndpoints message");
updateRemoteActionEndpoints(updateEndpoints.getActionEndpoints());
} else {
unknownMessage(message);
}
}
private void updateRemoteRpcEndpoints(final Map> rpcEndpoints) {
/*
* Updating RPC providers is a two-step process. We first add the newly-discovered RPCs and then close
* the old registration. This minimizes churn observed by listeners, as they will not observe RPC
* unavailability which would occur if we were to do it the other way around.
*
* Note that when an RPC moves from one remote node to another, we also do not want to expose the gap,
* hence we register all new implementations before closing all registrations.
*/
final var prevRegs = new ArrayList(rpcEndpoints.size());
for (Entry> e : rpcEndpoints.entrySet()) {
LOG.debug("Updating RPC registrations for {}", e.getKey());
final Registration prevReg;
final Optional maybeEndpoint = e.getValue();
if (maybeEndpoint.isPresent()) {
final RemoteRpcEndpoint endpoint = maybeEndpoint.orElseThrow();
final RemoteRpcImplementation impl = new RemoteRpcImplementation(endpoint.getRouter(), config);
prevReg = rpcRegs.put(e.getKey(), rpcProviderService.registerRpcImplementation(impl,
endpoint.getRpcs()));
} else {
prevReg = rpcRegs.remove(e.getKey());
}
if (prevReg != null) {
prevRegs.add(prevReg);
}
}
prevRegs.forEach(Registration::close);
}
/**
* Updates the action endpoints, Adding new registrations first before removing previous registrations.
*/
private void updateRemoteActionEndpoints(final Map> actionEndpoints) {
/*
* Updating Action providers is a two-step process. We first add the newly-discovered RPCs and then close
* the old registration. This minimizes churn observed by listeners, as they will not observe RPC
* unavailability which would occur if we were to do it the other way around.
*
* Note that when an Action moves from one remote node to another, we also do not want to expose the gap,
* hence we register all new implementations before closing all registrations.
*/
final var prevRegs = new ArrayList(actionEndpoints.size());
for (Entry> e : actionEndpoints.entrySet()) {
LOG.debug("Updating action registrations for {}", e.getKey());
final Registration prevReg;
final Optional maybeEndpoint = e.getValue();
if (maybeEndpoint.isPresent()) {
final RemoteActionEndpoint endpoint = maybeEndpoint.orElseThrow();
final RemoteActionImplementation impl = new RemoteActionImplementation(endpoint.getRouter(), config);
prevReg = actionRegs.put(e.getKey(), actionProviderService.registerActionImplementation(impl,
endpoint.getActions()));
} else {
prevReg = actionRegs.remove(e.getKey());
}
if (prevReg != null) {
prevRegs.add(prevReg);
}
}
prevRegs.forEach(Registration::close);
}
}