blob: dfbc2e2cbfe14c8ccf726863a1034fe3715032ab (
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
129
130
131
132
133
134
135
|
/*
* 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.definitions.xml;
import java.io.IOException;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessorExtensionPoint;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;
import org.apache.tuscany.sca.definitions.Definitions;
import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
import org.apache.tuscany.sca.monitor.MonitorFactory;
/**
* Default implementation of an extension point for XML definitionss.
*
* @version $Rev$ $Date$
*/
public class DefaultDefinitionsExtensionPoint implements DefinitionsExtensionPoint {
private static final Logger logger = Logger.getLogger(DefaultDefinitionsExtensionPoint.class.getName());
private static final URI DEFINITIONS_URI = URI.create("META-INF/definitions.xml");
private ExtensionPointRegistry registry;
private MonitorFactory monitorFactory;
private Set<URL> documents = new HashSet<URL>();
private List<Definitions> definitions = new ArrayList<Definitions>();
private boolean documentsLoaded;
private boolean loaded;
public DefaultDefinitionsExtensionPoint(ExtensionPointRegistry registry) {
this.registry = registry;
this.monitorFactory = registry.getExtensionPoint(UtilityExtensionPoint.class).getUtility(MonitorFactory.class);
}
public void addDefinitionsDocument(URL url) {
documents.add(url);
}
public void removeDefinitionsDocument(URL url) {
documents.remove(url);
}
/**
* Load definitions declarations from META-INF/services/
* org.apache.tuscany.sca.contribution.processor.Definitions files
*/
private synchronized void loadDefinitionsDocuments() {
if (documentsLoaded)
return;
// Get the definitions declarations
Collection<ServiceDeclaration> definitionsDeclarations;
try {
// Get definitions declarations in ranking order.
definitionsDeclarations = registry.getServiceDiscovery().getServiceDeclarations(DEFINITIONS_FILE, true);
} catch (IOException e) {
throw new IllegalStateException(e);
}
// Find each definitions
Set<String> definitionResources = new HashSet<String>();
for (ServiceDeclaration definitionsDeclaration : definitionsDeclarations) {
// Only process the first instance of a given resource name.
// This allows definitions files to be overridden by an embedder.
String resourceName = definitionsDeclaration.getClassName();
if (!definitionResources.contains(resourceName)) {
definitionResources.add(resourceName);
URL url = definitionsDeclaration.getResource(resourceName);
if (url == null) {
throw new IllegalArgumentException(definitionsDeclaration.getClassName() + " cannot be found");
}
documents.add(url);
}
}
documentsLoaded = true;
}
public synchronized List<Definitions> getDefinitions() {
if (!loaded) {
loadDefinitionsDocuments();
URLArtifactProcessorExtensionPoint processors =
registry.getExtensionPoint(URLArtifactProcessorExtensionPoint.class);
URLArtifactProcessor<Definitions> processor = processors.getProcessor(Definitions.class);
ProcessorContext context = new ProcessorContext(monitorFactory.createMonitor());
for (URL url : documents) {
Definitions def;
try {
def = processor.read(null, DEFINITIONS_URI, url, context);
definitions.add(def);
} catch (ContributionReadException e) {
logger.log(Level.SEVERE, e.getMessage(), e);
}
}
loaded = true;
}
return definitions;
}
public void addDefinitions(Definitions def) {
this.definitions.add(def);
}
public void removeDefinitions(Definitions def) {
this.definitions.remove(def);
}
}
|
