| /* |
| * 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 com.google.common.collect.Maps; |
| |
| 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.IdBlock; |
| import org.onosproject.core.IdBlockStore; |
| import org.onosproject.store.service.AtomicCounter; |
| import org.onosproject.store.service.StorageService; |
| import org.slf4j.Logger; |
| |
| import java.util.Map; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Implementation of {@code IdBlockStore} using {@code AtomicCounter}. |
| */ |
| @Component(immediate = true, enabled = true) |
| @Service |
| public class DistributedIdBlockStore implements IdBlockStore { |
| |
| private final Logger log = getLogger(getClass()); |
| private final Map<String, AtomicCounter> topicCounters = Maps.newConcurrentMap(); |
| |
| private static final long DEFAULT_BLOCK_SIZE = 0x100000L; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected StorageService storageService; |
| |
| @Activate |
| public void activate() { |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public IdBlock getIdBlock(String topic) { |
| AtomicCounter counter = topicCounters.computeIfAbsent(topic, storageService::getAtomicCounter); |
| return new IdBlock(counter.getAndAdd(DEFAULT_BLOCK_SIZE), DEFAULT_BLOCK_SIZE); |
| } |
| } |