blob: 9e88b6a68c7b41d9d608d30e38085cc55f72e386 (
plain)
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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* 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 org.apache.qpid.server.exchange;
import org.apache.qpid.server.queue.AMQQueue;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.CopyOnWriteArrayList;
/**
* An index of queues against routing key. Allows multiple queues to be stored
* against the same key. Used in the DestNameExchange.
*/
class Index
{
private ConcurrentMap<String, List<AMQQueue>> _index
= new ConcurrentHashMap<String, List<AMQQueue>>();
boolean add(String key, AMQQueue queue)
{
List<AMQQueue> queues = _index.get(key);
if(queues == null)
{
queues = new CopyOnWriteArrayList<AMQQueue>();
//next call is atomic, so there is no race to create the list
List<AMQQueue> active = _index.putIfAbsent(key, queues);
if(active != null)
{
//someone added the new one in faster than we did, so use theirs
queues = active;
}
}
if(queues.contains(queue))
{
return false;
}
else
{
return queues.add(queue);
}
}
boolean remove(String key, AMQQueue queue)
{
List<AMQQueue> queues = _index.get(key);
if (queues != null)
{
boolean removed = queues.remove(queue);
if (queues.size() == 0)
{
_index.remove(key);
}
return removed;
}
return false;
}
List<AMQQueue> get(String key)
{
return _index.get(key);
}
Map<String, List<AMQQueue>> getBindingsMap()
{
return _index;
}
}
|