| /* |
| * 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.cassandra.cache; |
| |
| import java.util.Iterator; |
| |
| /** |
| * This is similar to the Map interface, but requires maintaining a given capacity |
| * and does not require put or remove to return values, which lets SerializingCache |
| * be more efficient by avoiding deserialize except on get. |
| */ |
| public interface ICache<K, V> |
| { |
| public long capacity(); |
| |
| public void setCapacity(long capacity); |
| |
| public void put(K key, V value); |
| |
| public boolean putIfAbsent(K key, V value); |
| |
| public boolean replace(K key, V old, V value); |
| |
| public V get(K key); |
| |
| public void remove(K key); |
| |
| public int size(); |
| |
| public long weightedSize(); |
| |
| public void clear(); |
| |
| public Iterator<K> keyIterator(); |
| |
| public Iterator<K> hotKeyIterator(int n); |
| |
| public boolean containsKey(K key); |
| } |