| /* |
| * Copyright 2015-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.store.trivial; |
| |
| import org.onosproject.core.IdBlock; |
| import org.onosproject.core.IdBlockStore; |
| import org.osgi.service.component.annotations.Component; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| /** |
| * Simple implementation of id block store. |
| */ |
| @Component(immediate = true, service = IdBlockStore.class) |
| public class SimpleIdBlockStore implements IdBlockStore { |
| |
| private static final long DEFAULT_BLOCK_SIZE = 0x1000L; |
| |
| private final Map<String, AtomicLong> topicBlocks = new ConcurrentHashMap<>(); |
| |
| @Override |
| public synchronized IdBlock getIdBlock(String topic) { |
| AtomicLong blockGenerator = topicBlocks.get(topic); |
| if (blockGenerator == null) { |
| blockGenerator = new AtomicLong(0); |
| topicBlocks.put(topic, blockGenerator); |
| } |
| Long blockBase = blockGenerator.getAndAdd(DEFAULT_BLOCK_SIZE); |
| return new IdBlock(blockBase, DEFAULT_BLOCK_SIZE); |
| } |
| } |