com.hazelcast.map.impl.eviction.Evictor Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2015, Hazelcast, Inc. All Rights Reserved.
*
* 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.
*/
package com.hazelcast.map.impl.eviction;
import com.hazelcast.map.impl.recordstore.RecordStore;
/**
* Evicts a {@link RecordStore}.
*
* When the {@link RecordStore} needs to be evicted according to {@link EvictionChecker#checkEvictionPossible},
* {@link Evictor} removes records from {@link RecordStore}.
*/
public interface Evictor {
/**
* Find size to evict from a record-store.
*
* @param recordStore the recordStore
* @return removal size.
*/
int findRemovalSize(RecordStore recordStore);
/**
* Remove supplied number of elements from record-store.
*
* @param removalSize supplied size to remove.
* @param recordStore the recordStore
*/
void removeSize(int removalSize, RecordStore recordStore);
/**
* Get eviction checker for this {@link Evictor}
*
* @return the {@link EvictionChecker}
*/
EvictionChecker getEvictionChecker();
}