| /* |
| * Copyright 2015-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.core.impl; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| |
| import java.util.Map; |
| import java.util.Set; |
| |
| |
| 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.core.ApplicationId; |
| import org.onosproject.core.ApplicationIdStore; |
| import org.onosproject.core.DefaultApplicationId; |
| import org.onosproject.store.serializers.KryoNamespaces; |
| import org.onosproject.store.service.AtomicCounter; |
| import org.onosproject.store.service.ConsistentMap; |
| import org.onosproject.store.service.MapEvent; |
| import org.onosproject.store.service.MapEventListener; |
| import org.onosproject.store.service.Serializer; |
| import org.onosproject.store.service.StorageService; |
| import org.onosproject.store.service.Versioned; |
| import org.slf4j.Logger; |
| |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Maps; |
| |
| /** |
| * ApplicationIdStore implementation on top of {@code AtomicCounter} |
| * and {@code ConsistentMap} primitives. |
| */ |
| @Component(immediate = true, enabled = true) |
| @Service |
| public class DistributedApplicationIdStore implements ApplicationIdStore { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected StorageService storageService; |
| |
| private AtomicCounter appIdCounter; |
| private ConsistentMap<String, ApplicationId> registeredIds; |
| private Map<Short, ApplicationId> idToAppIdCache = Maps.newConcurrentMap(); |
| private MapEventListener<String, ApplicationId> mapEventListener = event -> { |
| if (event.type() == MapEvent.Type.INSERT) { |
| idToAppIdCache.put(event.newValue().value().id(), event.newValue().value()); |
| } |
| }; |
| |
| @Activate |
| public void activate() { |
| appIdCounter = storageService.getAtomicCounter("onos-app-id-counter"); |
| |
| registeredIds = storageService.<String, ApplicationId>consistentMapBuilder() |
| .withName("onos-app-ids") |
| .withSerializer(Serializer.using(KryoNamespaces.API)) |
| .withRelaxedReadConsistency() |
| .build(); |
| |
| primeIdToAppIdCache(); |
| registeredIds.addListener(mapEventListener); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| registeredIds.removeListener(mapEventListener); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public Set<ApplicationId> getAppIds() { |
| return ImmutableSet.copyOf(registeredIds.asJavaMap().values()); |
| } |
| |
| @Override |
| public ApplicationId getAppId(Short id) { |
| if (!idToAppIdCache.containsKey(id)) { |
| primeIdToAppIdCache(); |
| } |
| return idToAppIdCache.get(id); |
| } |
| |
| @Override |
| public ApplicationId getAppId(String name) { |
| return registeredIds.asJavaMap().get(name); |
| } |
| |
| @Override |
| public ApplicationId registerApplication(String name) { |
| return Versioned.valueOrNull(registeredIds.computeIfAbsent(name, |
| key -> new DefaultApplicationId((int) appIdCounter.incrementAndGet(), name))); |
| } |
| |
| private void primeIdToAppIdCache() { |
| registeredIds.asJavaMap() |
| .values() |
| .forEach(appId -> { |
| idToAppIdCache.putIfAbsent(appId.id(), appId); |
| }); |
| } |
| } |