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Diffstat (limited to 'appc-common/src/main/java/org/onap/appc/cache/impl/LRUCache.java')
-rw-r--r-- | appc-common/src/main/java/org/onap/appc/cache/impl/LRUCache.java | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/appc-common/src/main/java/org/onap/appc/cache/impl/LRUCache.java b/appc-common/src/main/java/org/onap/appc/cache/impl/LRUCache.java new file mode 100644 index 000000000..b82552f20 --- /dev/null +++ b/appc-common/src/main/java/org/onap/appc/cache/impl/LRUCache.java @@ -0,0 +1,59 @@ +/*- + * ============LICENSE_START======================================================= + * ONAP : APPC + * ================================================================================ + * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Copyright (C) 2017 Amdocs + * ============================================================================= + * 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. + * + * ECOMP is a trademark and service mark of AT&T Intellectual Property. + * ============LICENSE_END========================================================= + */ + +package org.onap.appc.cache.impl; + +import java.util.LinkedHashMap; +import java.util.Map; + +import org.onap.appc.cache.CacheStrategy; + +/** + * LRU cache implements CacheStategy<K, V> + * @param <K> Key + * @param <V> Value + */ +public class LRUCache<K,V> implements CacheStrategy<K,V> { + + private Map<K,V> map; + + LRUCache(final Integer capacity){ + map = new LinkedHashMap<K,V>(capacity, 0.75F, true) { + @Override + protected boolean removeEldestEntry(Map.Entry<K, V> eldest){ + return size() > capacity; + } + }; + } + + @Override + public V getObject(K key) { + return map.get(key); + } + + @Override + public void putObject(K key, V value) { + map.put(key,value); + } +} |