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
|
/*******************************************************************************
* Copyright (c) 2006-2007 Cognos Incorporated, IBM Corporation and others
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Cognos Incorporated - initial API and implementation
* IBM Corporation - bug fixes and enhancements
*******************************************************************************/
package org.eclipse.equinox.internal.cm;
import java.util.*;
import java.util.Map.Entry;
import org.osgi.framework.*;
import org.osgi.service.cm.*;
import org.osgi.service.log.LogService;
import org.osgi.util.tracker.ServiceTracker;
/**
* ManagedServiceTracker tracks... ManagedServices and notifies them about related configuration changes
*/
class ManagedServiceTracker extends ServiceTracker {
final ConfigurationAdminFactory configurationAdminFactory;
private final ConfigurationStore configurationStore;
// managedServiceReferences guards both managedServices and managedServiceReferences
private final Map managedServices = new HashMap();
private final Map managedServiceReferences = new HashMap();
private final SerializedTaskQueue queue = new SerializedTaskQueue("ManagedService Update Queue"); //$NON-NLS-1$
public ManagedServiceTracker(ConfigurationAdminFactory configurationAdminFactory, ConfigurationStore configurationStore, BundleContext context) {
super(context, ManagedService.class.getName(), null);
this.configurationAdminFactory = configurationAdminFactory;
this.configurationStore = configurationStore;
}
protected void notifyDeleted(ConfigurationImpl config) {
config.checkLocked();
String pid = config.getPid(false);
ServiceReference reference = getManagedServiceReference(pid);
if (reference != null && config.bind(reference.getBundle()))
asynchUpdated(getManagedService(pid), null);
}
protected void notifyUpdated(ConfigurationImpl config) {
config.checkLocked();
String pid = config.getPid();
ServiceReference reference = getManagedServiceReference(pid);
if (reference != null && config.bind(reference.getBundle())) {
Dictionary properties = config.getProperties();
configurationAdminFactory.modifyConfiguration(reference, properties);
asynchUpdated(getManagedService(pid), properties);
}
}
public Object addingService(ServiceReference reference) {
String pid = (String) reference.getProperty(Constants.SERVICE_PID);
if (pid == null)
return null;
ManagedService service = (ManagedService) context.getService(reference);
if (service == null)
return null;
synchronized (configurationStore) {
add(reference, pid, service);
}
return service;
}
public void modifiedService(ServiceReference reference, Object service) {
String pid = (String) reference.getProperty(Constants.SERVICE_PID);
synchronized (configurationStore) {
if (getManagedService(pid) == service)
return;
String previousPid = getPidForManagedService(service);
remove(reference, previousPid);
addingService(reference);
}
}
public void removedService(ServiceReference reference, Object service) {
String pid = (String) reference.getProperty(Constants.SERVICE_PID);
synchronized (configurationStore) {
remove(reference, pid);
}
context.ungetService(reference);
}
private void add(ServiceReference reference, String pid, ManagedService service) {
ConfigurationImpl config = configurationStore.findConfiguration(pid);
if (config == null && trackManagedService(pid, reference, service)) {
asynchUpdated(service, null);
} else {
try {
config.lock();
if (trackManagedService(pid, reference, service)) {
if (config.getFactoryPid() != null) {
configurationAdminFactory.log(LogService.LOG_WARNING, "Configuration for " + Constants.SERVICE_PID + "=" + pid + " should only be used by a " + ManagedServiceFactory.class.getName()); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
} else if (config.isDeleted()) {
asynchUpdated(service, null);
} else if (config.bind(reference.getBundle())) {
Dictionary properties = config.getProperties();
configurationAdminFactory.modifyConfiguration(reference, properties);
asynchUpdated(service, properties);
} else {
configurationAdminFactory.log(LogService.LOG_WARNING, "Configuration for " + Constants.SERVICE_PID + "=" + pid + " could not be bound to " + reference.getBundle().getLocation()); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
}
}
} finally {
config.unlock();
}
}
}
private void remove(ServiceReference reference, String pid) {
ConfigurationImpl config = configurationStore.findConfiguration(pid);
if (config == null) {
untrackManagedService(pid, reference);
} else {
try {
config.lock();
untrackManagedService(pid, reference);
} finally {
config.unlock();
}
}
}
private boolean trackManagedService(String pid, ServiceReference reference, ManagedService service) {
synchronized (managedServiceReferences) {
if (managedServiceReferences.containsKey(pid)) {
String message = ManagedService.class.getName() + " already registered for " + Constants.SERVICE_PID + "=" + pid; //$NON-NLS-1$ //$NON-NLS-2$
configurationAdminFactory.log(LogService.LOG_WARNING, message);
return false;
}
managedServiceReferences.put(pid, reference);
managedServices.put(pid, service);
return true;
}
}
private void untrackManagedService(String pid, ServiceReference reference) {
synchronized (managedServiceReferences) {
managedServiceReferences.remove(pid);
managedServices.remove(pid);
}
}
private ManagedService getManagedService(String pid) {
synchronized (managedServiceReferences) {
return (ManagedService) managedServices.get(pid);
}
}
private ServiceReference getManagedServiceReference(String pid) {
synchronized (managedServiceReferences) {
return (ServiceReference) managedServiceReferences.get(pid);
}
}
private String getPidForManagedService(Object service) {
synchronized (managedServiceReferences) {
for (Iterator it = managedServices.entrySet().iterator(); it.hasNext();) {
Entry entry = (Entry) it.next();
if (entry.getValue() == service)
return (String) entry.getKey();
}
return null;
}
}
private void asynchUpdated(final ManagedService service, final Dictionary properties) {
queue.put(new Runnable() {
public void run() {
try {
service.updated(properties);
} catch (ConfigurationException e) {
// we might consider doing more for ConfigurationExceptions
Throwable cause = e.getCause();
configurationAdminFactory.log(LogService.LOG_ERROR, e.getMessage(), cause != null ? cause : e);
} catch (Throwable t) {
configurationAdminFactory.log(LogService.LOG_ERROR, t.getMessage(), t);
}
}
});
}
}
|
