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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* 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.implementation.osgi.invocation;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Hashtable;
import java.util.List;
import java.util.Random;
import java.util.jar.JarOutputStream;
import java.util.jar.Manifest;
import org.apache.tuscany.sca.assembly.ComponentService;
import org.apache.tuscany.sca.core.context.InstanceWrapper;
import org.apache.tuscany.sca.core.scope.Scope;
import org.apache.tuscany.sca.core.scope.TargetDestructionException;
import org.apache.tuscany.sca.core.scope.TargetInitializationException;
import org.apache.tuscany.sca.interfacedef.Interface;
import org.apache.tuscany.sca.runtime.EndpointReference;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
/**
* InstanceWrapper for creating instances for OSGi components.
* This class needs to implement InstanceWrapper since the wrapper is stored in
* the scope container. But getInstance() is called on this wrapper only through the
* OSGi target invoker. OSGiTargetInvoker always invokes getInstance for a specific
* service since one OSGi SCA component can associate different objects with
* different services (this is different from Java SCA components which always associate
* a single component instance with multiple services).
*
*/
public class OSGiInstanceWrapper<T> implements InstanceWrapper<T> {
private OSGiImplementationProvider provider;
private BundleContext bundleContext;
private Hashtable<Object,InstanceInfo<T>> instanceInfoList =
new Hashtable<Object,InstanceInfo<T>>();
public OSGiInstanceWrapper(OSGiImplementationProvider provider,
BundleContext bundleContext) {
this.provider = provider;
this.bundleContext = bundleContext;
}
public synchronized T getInstance(ComponentService service) throws TargetInitializationException {
if (instanceInfoList.get(service) != null)
return instanceInfoList.get(service).osgiInstance;
Bundle refBundle = provider.startBundle();
if (!provider.getImplementation().getScope().equals(Scope.COMPOSITE)) {
refBundle = getDummyReferenceBundle();
}
InstanceInfo<T> instanceInfo = new InstanceInfo<T>();
instanceInfoList.put(service, instanceInfo);
instanceInfo.osgiServiceReference = provider.getOSGiServiceReference(service);
instanceInfo.refBundleContext = refBundle.getBundleContext();
instanceInfo.osgiInstance = (T)instanceInfo.refBundleContext.getService(instanceInfo.osgiServiceReference);
provider.injectProperties(instanceInfo.osgiInstance);
return instanceInfo.osgiInstance;
}
public synchronized T getCallbackInstance(EndpointReference from, Interface callbackInterface)
throws TargetInitializationException {
if (instanceInfoList.get(callbackInterface) != null)
return instanceInfoList.get(callbackInterface).osgiInstance;
Bundle refBundle = provider.startBundle();
if (!provider.getImplementation().getScope().equals(Scope.COMPOSITE)) {
refBundle = getDummyReferenceBundle();
}
InstanceInfo<T> instanceInfo = new InstanceInfo<T>();
instanceInfoList.put(callbackInterface, instanceInfo);
instanceInfo.osgiServiceReference = provider.getOSGiServiceReference(from, callbackInterface);
instanceInfo.refBundleContext = refBundle.getBundleContext();
instanceInfo.osgiInstance = (T)instanceInfo.refBundleContext.getService(instanceInfo.osgiServiceReference);
return instanceInfo.osgiInstance;
}
// This method is provided purely to implement InstanceWrapper interface, and is never called.
public T getInstance() {
return null;
}
public void start() throws TargetInitializationException {
if (provider.isEagerInit()) {
List<ComponentService> services = provider.getRuntimeComponent().getServices();
for (ComponentService service : services) {
getInstance(service);
}
}
}
public synchronized void stop() throws TargetDestructionException {
for (InstanceInfo<T> instanceInfo : instanceInfoList.values()) {
if (instanceInfo.osgiInstance != null && instanceInfo.osgiServiceReference != null) {
instanceInfo.refBundleContext.ungetService(instanceInfo.osgiServiceReference);
instanceInfo.osgiInstance = null;
instanceInfo.osgiServiceReference = null;
try {
if (instanceInfo.dummyBundle != null) {
instanceInfo.dummyBundle.uninstall();
}
} catch (Exception e) {
throw new TargetDestructionException(e);
}
}
}
instanceInfoList.clear();
}
private Bundle getDummyReferenceBundle() throws TargetInitializationException {
Bundle dummyBundle = null;
ByteArrayOutputStream out = new ByteArrayOutputStream();
String EOL = System.getProperty("line.separator");
String bundleName = "dummy.sca." + new Random().nextInt();
String manifestStr = "Manifest-Version: 1.0" + EOL +
"Bundle-ManifestVersion: 2" + EOL +
"Bundle-Name: " + bundleName + EOL +
"Bundle-SymbolicName: " + bundleName + EOL +
"Bundle-Version: " + "1.0.0" + EOL +
"Bundle-Localization: plugin" + EOL;
StringBuilder manifestBuf = new StringBuilder();
manifestBuf.append(manifestStr);
try {
ByteArrayInputStream manifestStream = new ByteArrayInputStream(manifestBuf.toString().getBytes());
Manifest manifest = new Manifest();
manifest.read(manifestStream);
JarOutputStream jarOut = new JarOutputStream(out, manifest);
jarOut.close();
out.close();
ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
dummyBundle = bundleContext.installBundle("file://" + bundleName + ".jar", in);
dummyBundle.start();
} catch (Exception e) {
throw new TargetInitializationException(e);
}
return dummyBundle;
}
private static class InstanceInfo<T> {
private T osgiInstance;
private ServiceReference osgiServiceReference;
private Bundle dummyBundle;
private BundleContext refBundleContext;
}
}
|
