Thomas Vachuska | e0f804a | 2014-10-27 23:40:48 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.onlab.onos.store.trivial.impl; |
| 20 | |
| 21 | import com.google.common.collect.ImmutableSet; |
| 22 | import org.apache.felix.scr.annotations.Component; |
| 23 | import org.apache.felix.scr.annotations.Service; |
| 24 | import org.onlab.onos.core.ApplicationId; |
| 25 | import org.onlab.onos.core.ApplicationIdStore; |
| 26 | import org.onlab.onos.core.DefaultApplicationId; |
| 27 | |
| 28 | import java.util.Map; |
| 29 | import java.util.Set; |
| 30 | import java.util.concurrent.ConcurrentHashMap; |
| 31 | import java.util.concurrent.atomic.AtomicInteger; |
| 32 | |
| 33 | /** |
| 34 | * Simple implementation of the application ID registry using in-memory |
| 35 | * structures. |
| 36 | */ |
| 37 | @Component(immediate = true) |
| 38 | @Service |
| 39 | public class SimpleApplicationIdStore implements ApplicationIdStore { |
| 40 | |
| 41 | private static final AtomicInteger ID_DISPENSER = new AtomicInteger(1); |
| 42 | |
| 43 | private final Map<Short, DefaultApplicationId> appIds = new ConcurrentHashMap<>(); |
| 44 | private final Map<String, DefaultApplicationId> appIdsByName = new ConcurrentHashMap<>(); |
| 45 | |
| 46 | @Override |
| 47 | public Set<ApplicationId> getAppIds() { |
| 48 | return ImmutableSet.<ApplicationId>copyOf(appIds.values()); |
| 49 | } |
| 50 | |
| 51 | @Override |
| 52 | public ApplicationId getAppId(Short id) { |
| 53 | return appIds.get(id); |
| 54 | } |
| 55 | |
| 56 | @Override |
| 57 | public ApplicationId registerApplication(String name) { |
| 58 | DefaultApplicationId appId = appIdsByName.get(name); |
| 59 | if (appId == null) { |
| 60 | short id = (short) ID_DISPENSER.getAndIncrement(); |
| 61 | appId = new DefaultApplicationId(id, name); |
| 62 | appIds.put(id, appId); |
| 63 | appIdsByName.put(name, appId); |
| 64 | } |
| 65 | return appId; |
| 66 | } |
| 67 | |
| 68 | } |