1 /***
2 * Copyright 2003-2010 Terracotta, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package net.sf.ehcache.pool;
18
19 import java.util.Collection;
20
21 /***
22 * PoolEvictors are responsible for finding the best candidates in a collection of resources using a shared
23 * resource pool and performing eviction on them.
24 *
25 * @param <T> The type of the resources to free space on.
26 * @author Ludovic Orban
27 */
28 public interface PoolEvictor<T> {
29
30 /***
31 * Free at least N bytes from a collection of resources
32 *
33 * @param from a collection of resources to free from
34 * @param bytes the number of bytes to free up
35 * @return true if at least N bytes could be freed
36 */
37 boolean freeSpace(Collection<T> from, long bytes);
38
39 }