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/*
* Copyright 2015 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.onlab.util.KryoNamespace;
import org.onlab.util.Tools;
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.Serializer;
import org.onosproject.store.service.StorageException;
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 ConsistentApplicationIdStore 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<String, ApplicationId> nameToAppIdCache = Maps.newConcurrentMap();
private Map<Short, ApplicationId> idToAppIdCache = Maps.newConcurrentMap();
private static final Serializer SERIALIZER = Serializer.using(new KryoNamespace.Builder()
.register(KryoNamespaces.API)
.nextId(KryoNamespaces.BEGIN_USER_CUSTOM_ID)
.build());
@Activate
public void activate() {
appIdCounter = storageService.atomicCounterBuilder()
.withName("onos-app-id-counter")
.withPartitionsDisabled()
.build();
registeredIds = storageService.<String, ApplicationId>consistentMapBuilder()
.withName("onos-app-ids")
.withPartitionsDisabled()
.withSerializer(SERIALIZER)
.build();
primeAppIds();
log.info("Started");
}
@Deactivate
public void deactivate() {
log.info("Stopped");
}
@Override
public Set<ApplicationId> getAppIds() {
// TODO: Rework this when we have notification support in ConsistentMap.
primeAppIds();
return ImmutableSet.copyOf(nameToAppIdCache.values());
}
@Override
public ApplicationId getAppId(Short id) {
if (!idToAppIdCache.containsKey(id)) {
primeAppIds();
}
return idToAppIdCache.get(id);
}
@Override
public ApplicationId getAppId(String name) {
ApplicationId appId = nameToAppIdCache.computeIfAbsent(name, key -> {
Versioned<ApplicationId> existingAppId = registeredIds.get(key);
return existingAppId != null ? existingAppId.value() : null;
});
if (appId != null) {
idToAppIdCache.putIfAbsent(appId.id(), appId);
}
return appId;
}
@Override
public ApplicationId registerApplication(String name) {
ApplicationId appId = nameToAppIdCache.computeIfAbsent(name, key -> {
Versioned<ApplicationId> existingAppId = registeredIds.get(name);
if (existingAppId == null) {
int id = Tools.retryable(appIdCounter::incrementAndGet, StorageException.class, 1, 2000)
.get()
.intValue();
DefaultApplicationId newAppId = new DefaultApplicationId(id, name);
existingAppId = registeredIds.putIfAbsent(name, newAppId);
if (existingAppId != null) {
return existingAppId.value();
} else {
return newAppId;
}
} else {
return existingAppId.value();
}
});
idToAppIdCache.putIfAbsent(appId.id(), appId);
return appId;
}
private void primeAppIds() {
registeredIds.values()
.stream()
.map(Versioned::value)
.forEach(appId -> {
nameToAppIdCache.putIfAbsent(appId.name(), appId);
idToAppIdCache.putIfAbsent(appId.id(), appId);
});
}
}
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