| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.polygene.test.cache; |
| |
| import java.util.Objects; |
| import java.util.concurrent.ConcurrentHashMap; |
| import org.apache.polygene.spi.cache.Cache; |
| |
| import static org.apache.polygene.api.util.Collectors.single; |
| |
| /** |
| * In-Memory CachePool Mixin based on ConcurrentHashMap. |
| */ |
| public abstract class MemoryCachePoolMixin |
| implements MemoryCachePoolService |
| { |
| private final ConcurrentHashMap<String, MemoryCacheImpl<?>> caches = new ConcurrentHashMap<>(); |
| |
| @Override |
| public <T> Cache<T> fetchCache( String cacheId, Class<T> valueType ) |
| { |
| Objects.requireNonNull( cacheId, "cacheId" ); |
| if( cacheId.isEmpty() ) |
| { |
| throw new IllegalArgumentException( "cacheId was empty string" ); |
| } |
| @SuppressWarnings( "unchecked" ) |
| MemoryCacheImpl<T> cache = (MemoryCacheImpl<T>) caches.computeIfAbsent( cacheId, k -> createNewCache( cacheId, valueType ) ); |
| cache.incRefCount(); |
| return cache; |
| } |
| |
| private <T> MemoryCacheImpl<T> createNewCache( String cacheId, Class<T> valueType ) |
| { |
| return new MemoryCacheImpl<>( cacheId, new ConcurrentHashMap<>(), valueType ); |
| } |
| |
| @Override |
| public void returnCache( Cache<?> cache ) |
| { |
| MemoryCacheImpl<?> memory = (MemoryCacheImpl<?>) cache; |
| memory.decRefCount(); |
| if( memory.isNotUsed() ) |
| { |
| caches.remove( memory.cacheId() ); |
| } |
| } |
| |
| @Override |
| public void activateService() |
| throws Exception |
| { |
| caches.clear(); |
| } |
| |
| @Override |
| public void passivateService() |
| throws Exception |
| { |
| caches.clear(); |
| } |
| |
| @Override |
| public MemoryCacheImpl<?> singleCache() |
| { |
| return caches.values().stream().collect( single() ); |
| } |
| } |