blob: 054ebeda13cadbe88d0df6c5b0ef6230db3bea04 (
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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.sca.runtime;
import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.LifeCycleListener;
import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
/**
* The default implementation of a <code>WireProcessorExtensionPoint</code>
*
* @version $Rev$ $Date$
*/
public class DefaultWireProcessorExtensionPoint implements RuntimeWireProcessorExtensionPoint, LifeCycleListener {
private ExtensionPointRegistry registry;
private boolean loaded;
/**
* @param registry
*/
public DefaultWireProcessorExtensionPoint(ExtensionPointRegistry registry) {
super();
this.registry = registry;
}
/**
* The list of WireProcessors available to the runtime
*/
private final List<RuntimeWireProcessor> processors = new ArrayList<RuntimeWireProcessor>();
/**
* Registers a wire-processor in the runtime
*
* @param processor The processor to register
*/
public void addWireProcessor(RuntimeWireProcessor processor) {
processors.add(processor);
if (processor instanceof LifeCycleListener) {
((LifeCycleListener)processor).start();
}
}
/**
* De-registers a wire-processor in the runtime
*
* @param processor The processor to de-register
*/
public void removeWireProcessor(RuntimeWireProcessor processor) {
boolean found = processors.remove(processor);
if (found && (processor instanceof LifeCycleListener)) {
((LifeCycleListener)processor).stop();
}
}
/**
* Returns a list of registered wire-processors.
*
* @return The list of wire processors
*/
public List<RuntimeWireProcessor> getWireProcessors() {
loadWireProcessors();
return processors;
}
private synchronized void loadWireProcessors() {
if (loaded) {
return;
}
try {
Collection<ServiceDeclaration> sds =
registry.getServiceDiscovery().getServiceDeclarations(RuntimeWireProcessor.class, true);
sds = ServiceDiscovery.removeDuplicateDeclarations(sds);
for (ServiceDeclaration sd : sds) {
Class type = sd.loadClass();
Constructor constructor = null;
RuntimeWireProcessor processor = null;
try {
constructor = type.getConstructor(ExtensionPointRegistry.class);
processor = (RuntimeWireProcessor)constructor.newInstance(registry);
} catch (NoSuchMethodException e) {
constructor = type.getConstructor();
processor = (RuntimeWireProcessor)constructor.newInstance();
}
if (processor != null) {
addWireProcessor(processor);
}
}
loaded = true;
} catch (Throwable e) {
throw new IllegalStateException(e);
}
}
public void start() {
}
public void stop() {
for (RuntimeWireProcessor processor : processors) {
if ((processor instanceof LifeCycleListener)) {
((LifeCycleListener)processor).stop();
}
}
processors.clear();
}
}
|
