org.apache.cassandra.cache.ICache Maven / Gradle / Ivy
/*
* 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 extends CacheSize
{
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 void clear();
public Iterator keyIterator();
public Iterator hotKeyIterator(int n);
public boolean containsKey(K key);
}