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.impl;
18
19 import net.sf.ehcache.pool.PoolableStore;
20 import net.sf.ehcache.pool.PoolEvictor;
21
22 import java.util.Collection;
23
24 /***
25 * @author Ludovic Orban
26 */
27 public class RoundRobinOnHeapPoolEvictor implements PoolEvictor<PoolableStore> {
28 public boolean freeSpace(Collection<PoolableStore> from, long bytes) {
29 long remaining = bytes;
30
31 while (true) {
32 for (PoolableStore poolableStore : from) {
33 long beforeEvictionSize = poolableStore.getInMemorySizeInBytes();
34 if (!poolableStore.evictFromOnHeap(1, bytes)) {
35 return false;
36 }
37 long afterEvictionSize = poolableStore.getInMemorySizeInBytes();
38
39 remaining -= (beforeEvictionSize - afterEvictionSize);
40 if (remaining <= 0L) {
41 return true;
42 }
43 }
44 }
45 }
46 }