blob: 6ccecb5007d451eb290be73fc488d8ca5a3bdf5e (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/***************************************************************************
* Copyright (c) 2004 - 2009 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.emf.cdo.internal.common.revision.cache.lru;
import java.text.MessageFormat;
/**
* @author Eike Stepper
*/
public class LRURevisionList extends DLRevisionList
{
private int capacity;
public LRURevisionList(int capacity)
{
this.capacity = capacity;
}
public int capacity()
{
return capacity;
}
/**
* Sets the capacity of LRU cache revisions. A value of zero disables eviction completely such that the cache will
* grow indefinetely.
*/
public void capacity(int capacity)
{
this.capacity = capacity;
eviction();
}
@Override
public void add(DLRevisionHolder holder)
{
addHead(holder);
eviction();
}
@Override
public String toString()
{
return MessageFormat.format("LRURevisionList[size={0}, capacity={1}]", size(), capacity);
}
protected void eviction()
{
if (capacity != 0)
{
while (size() > capacity)
{
evict((LRURevisionHolder)getDLTail());
}
}
}
protected void evict(LRURevisionHolder holder)
{
remove(holder);
}
}
|