| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.cluster.impl; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| import java.util.Map; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.onosproject.cluster.ClusterService; |
| import org.onosproject.cluster.Leadership; |
| import org.onosproject.cluster.LeadershipAdminService; |
| import org.onosproject.cluster.LeadershipEvent; |
| import org.onosproject.cluster.LeadershipEventListener; |
| import org.onosproject.cluster.LeadershipService; |
| import org.onosproject.cluster.LeadershipStore; |
| import org.onosproject.cluster.LeadershipStoreDelegate; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.event.AbstractListenerManager; |
| import org.slf4j.Logger; |
| |
| import com.google.common.collect.Maps; |
| |
| /** |
| * Implementation of {@link LeadershipService} and {@link LeadershipAdminService}. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class LeadershipManager |
| extends AbstractListenerManager<LeadershipEvent, LeadershipEventListener> |
| implements LeadershipService, LeadershipAdminService { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private LeadershipStoreDelegate delegate = this::post; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LeadershipStore store; |
| |
| private NodeId localNodeId; |
| |
| @Activate |
| public void activate() { |
| localNodeId = clusterService.getLocalNode().id(); |
| store.setDelegate(delegate); |
| eventDispatcher.addSink(LeadershipEvent.class, listenerRegistry); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| Maps.filterValues(store.getLeaderships(), v -> v.candidates().contains(localNodeId)) |
| .keySet() |
| .forEach(this::withdraw); |
| store.unsetDelegate(delegate); |
| eventDispatcher.removeSink(LeadershipEvent.class); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public Leadership getLeadership(String topic) { |
| return store.getLeadership(topic); |
| } |
| |
| @Override |
| public Leadership runForLeadership(String topic) { |
| return store.addRegistration(topic); |
| } |
| |
| @Override |
| public void withdraw(String topic) { |
| store.removeRegistration(topic); |
| } |
| |
| @Override |
| public Map<String, Leadership> getLeaderBoard() { |
| return store.getLeaderships(); |
| } |
| |
| @Override |
| public boolean transferLeadership(String topic, NodeId to) { |
| return store.moveLeadership(topic, to); |
| } |
| |
| @Override |
| public void unregister(NodeId nodeId) { |
| store.removeRegistration(nodeId); |
| } |
| |
| @Override |
| public boolean promoteToTopOfCandidateList(String topic, NodeId nodeId) { |
| return store.makeTopCandidate(topic, nodeId); |
| } |
| } |