blob: accf6b3030d096972ec1102f9dd6944fc7553524 (
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
|
/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.tuscany.core.context.impl;
import java.util.HashMap;
import java.util.Map;
import org.apache.tuscany.core.context.EventContext;
import org.apache.tuscany.core.context.ScopeIdentifier;
/**
* An implementation of an {@link org.apache.tuscany.core.context.EventContext} that handles event-to-thread associations using an
* <code>InheritableThreadLocal</code>
*
* @version $Rev$ $Date$
*/
public class EventContextImpl implements EventContext {
// @TODO design a proper propagation strategy for creating new threads
/*
* a map ( associated with the current thread) of scope identifiers keyed on the event context id type. the scope identifier
* may be a {@link ScopeIdentifier} or an opaque id
*/
private ThreadLocal<Map> eventContext = new InheritableThreadLocal();
public Object getIdentifier(Object type) {
Map map = eventContext.get();
if (map == null) {
return null;
}
Object currentId = map.get(type);
if (currentId instanceof ScopeIdentifier) {
currentId = ((ScopeIdentifier) currentId).getIdentifier();
// once we have accessed the id, replace the lazy wrapper
map.put(type, currentId);
}
return currentId;
}
public void setIdentifier(Object type, Object identifier) {
Map map = eventContext.get();
if (map == null) {
map = new HashMap();
eventContext.set(map);
}
map.put(type, identifier);
}
public void clearIdentifier(Object type) {
if (type == null) {
return;
}
Map map = eventContext.get();
if (map != null) {
map.remove(type);
}
}
public EventContextImpl() {
super();
}
}
|
