| /* |
| * Copyright 2014-present Open Networking Laboratory |
| * |
| * 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.store.flow.impl; |
| |
| import com.google.common.collect.ImmutableList; |
| 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.NodeId; |
| import org.onosproject.cluster.RoleInfo; |
| import org.onosproject.event.EventDeliveryService; |
| import org.onosproject.event.ListenerRegistry; |
| import org.onosproject.mastership.MastershipEvent; |
| import org.onosproject.mastership.MastershipListener; |
| import org.onosproject.mastership.MastershipService; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.store.flow.ReplicaInfo; |
| import org.onosproject.store.flow.ReplicaInfoEvent; |
| import org.onosproject.store.flow.ReplicaInfoEventListener; |
| import org.onosproject.store.flow.ReplicaInfoService; |
| import org.slf4j.Logger; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.onosproject.store.flow.ReplicaInfoEvent.Type.BACKUPS_CHANGED; |
| import static org.onosproject.store.flow.ReplicaInfoEvent.Type.MASTER_CHANGED; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Manages replica placement information. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class ReplicaInfoManager implements ReplicaInfoService { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private final MastershipListener mastershipListener = new InternalMastershipListener(); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected EventDeliveryService eventDispatcher; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected MastershipService mastershipService; |
| |
| protected final ListenerRegistry<ReplicaInfoEvent, ReplicaInfoEventListener> |
| listenerRegistry = new ListenerRegistry<>(); |
| |
| @Activate |
| public void activate() { |
| eventDispatcher.addSink(ReplicaInfoEvent.class, listenerRegistry); |
| mastershipService.addListener(mastershipListener); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| eventDispatcher.removeSink(ReplicaInfoEvent.class); |
| mastershipService.removeListener(mastershipListener); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public ReplicaInfo getReplicaInfoFor(DeviceId deviceId) { |
| return buildFromRoleInfo(mastershipService.getNodesFor(deviceId)); |
| } |
| |
| @Override |
| public void addListener(ReplicaInfoEventListener listener) { |
| listenerRegistry.addListener(checkNotNull(listener)); |
| } |
| |
| @Override |
| public void removeListener(ReplicaInfoEventListener listener) { |
| listenerRegistry.removeListener(checkNotNull(listener)); |
| } |
| |
| private static ReplicaInfo buildFromRoleInfo(RoleInfo roles) { |
| List<NodeId> backups = roles.backups() == null ? |
| Collections.emptyList() : ImmutableList.copyOf(roles.backups()); |
| return new ReplicaInfo(roles.master(), backups); |
| } |
| |
| final class InternalMastershipListener implements MastershipListener { |
| |
| @Override |
| public void event(MastershipEvent event) { |
| final ReplicaInfo replicaInfo = buildFromRoleInfo(event.roleInfo()); |
| switch (event.type()) { |
| case MASTER_CHANGED: |
| eventDispatcher.post(new ReplicaInfoEvent(MASTER_CHANGED, |
| event.subject(), |
| replicaInfo)); |
| break; |
| case BACKUPS_CHANGED: |
| eventDispatcher.post(new ReplicaInfoEvent(BACKUPS_CHANGED, |
| event.subject(), |
| replicaInfo)); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| } |