1 | /* |
2 | * Copyright 2006-2007 Aaron Seigo <aseigo@kde.org> |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU Library General Public License as |
6 | * published by the Free Software Foundation; either version 2, or |
7 | * (at your option) any later version. |
8 | * |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | * GNU General Public License for more details |
13 | * |
14 | * You should have received a copy of the GNU Library General Public |
15 | * License along with this program; if not, write to the |
16 | * Free Software Foundation, Inc., |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
18 | */ |
19 | |
20 | #include "dataenginemanager.h" |
21 | |
22 | #include <QFile> |
23 | #include <QTextStream> |
24 | |
25 | #include <kdebug.h> |
26 | #include <kglobal.h> |
27 | #include <kstandarddirs.h> |
28 | #include <kservicetypetrader.h> |
29 | |
30 | #include "datacontainer.h" |
31 | #include "pluginloader.h" |
32 | #include "private/componentinstaller_p.h" |
33 | #include "private/dataengine_p.h" |
34 | #include "private/datacontainer_p.h" |
35 | #include "scripting/scriptengine.h" |
36 | |
37 | namespace Plasma |
38 | { |
39 | |
40 | class NullEngine : public DataEngine |
41 | { |
42 | public: |
43 | NullEngine(QObject *parent = 0) |
44 | : DataEngine(parent) |
45 | { |
46 | setValid(false); |
47 | |
48 | // ref() ourselves to ensure we never get deleted |
49 | d->ref(); |
50 | } |
51 | }; |
52 | |
53 | class DataEngineManagerPrivate |
54 | { |
55 | public: |
56 | DataEngineManagerPrivate() |
57 | : nullEng(0) |
58 | {} |
59 | |
60 | ~DataEngineManagerPrivate() |
61 | { |
62 | foreach (Plasma::DataEngine *engine, engines) { |
63 | delete engine; |
64 | } |
65 | engines.clear(); |
66 | delete nullEng; |
67 | } |
68 | |
69 | DataEngine *nullEngine() |
70 | { |
71 | if (!nullEng) { |
72 | nullEng = new NullEngine; |
73 | } |
74 | |
75 | return nullEng; |
76 | } |
77 | |
78 | DataEngine::Dict engines; |
79 | DataEngine *nullEng; |
80 | }; |
81 | |
82 | class DataEngineManagerSingleton |
83 | { |
84 | public: |
85 | DataEngineManager self; |
86 | }; |
87 | |
88 | K_GLOBAL_STATIC(DataEngineManagerSingleton, privateDataEngineManagerSelf) |
89 | |
90 | DataEngineManager *DataEngineManager::self() |
91 | { |
92 | return &privateDataEngineManagerSelf->self; |
93 | } |
94 | |
95 | DataEngineManager::DataEngineManager() |
96 | : d(new DataEngineManagerPrivate) |
97 | { |
98 | //startTimer(30000); |
99 | } |
100 | |
101 | DataEngineManager::~DataEngineManager() |
102 | { |
103 | delete d; |
104 | } |
105 | |
106 | Plasma::DataEngine *DataEngineManager::engine(const QString &name) const |
107 | { |
108 | if (name.isEmpty()) { |
109 | return d->nullEngine(); |
110 | } |
111 | |
112 | Plasma::DataEngine::Dict::const_iterator it = d->engines.constFind(name); |
113 | if (it != d->engines.constEnd()) { |
114 | // ref and return the engine |
115 | //Plasma::DataEngine *engine = *it; |
116 | return *it; |
117 | } |
118 | |
119 | return d->nullEngine(); |
120 | } |
121 | |
122 | Plasma::DataEngine *DataEngineManager::loadEngine(const QString &name) |
123 | { |
124 | Plasma::DataEngine::Dict::const_iterator it = d->engines.constFind(name); |
125 | |
126 | if (it != d->engines.constEnd()) { |
127 | DataEngine *engine = *it; |
128 | engine->d->ref(); |
129 | return engine; |
130 | } |
131 | |
132 | DataEngine *engine = PluginLoader::pluginLoader()->loadDataEngine(name); |
133 | if (!engine) { |
134 | // Try installing the engine. However, it's too late for this request. |
135 | ComponentInstaller::self()->installMissingComponent("dataengine" , name); |
136 | |
137 | return d->nullEngine(); |
138 | } |
139 | |
140 | engine->init(); |
141 | d->engines[name] = engine; |
142 | return engine; |
143 | } |
144 | |
145 | void DataEngineManager::unloadEngine(const QString &name) |
146 | { |
147 | Plasma::DataEngine::Dict::iterator it = d->engines.find(name); |
148 | |
149 | if (it != d->engines.end()) { |
150 | Plasma::DataEngine *engine = *it; |
151 | engine->d->deref(); |
152 | |
153 | if (!engine->d->isUsed()) { |
154 | d->engines.erase(it); |
155 | delete engine; |
156 | } |
157 | } |
158 | } |
159 | |
160 | QStringList DataEngineManager::listAllEngines(const QString &parentApp) |
161 | { |
162 | QString constraint; |
163 | |
164 | if (parentApp.isEmpty()) { |
165 | constraint.append("(not exist [X-KDE-ParentApp] or [X-KDE-ParentApp] == '')" ); |
166 | } else { |
167 | constraint.append("[X-KDE-ParentApp] == '" ).append(parentApp).append("'" ); |
168 | } |
169 | |
170 | KService::List offers = KServiceTypeTrader::self()->query("Plasma/DataEngine" , constraint); |
171 | |
172 | QStringList engines; |
173 | foreach (const KService::Ptr &service, offers) { |
174 | QString name = service->property("X-KDE-PluginInfo-Name" ).toString(); |
175 | if (!name.isEmpty()) { |
176 | engines.append(name); |
177 | } |
178 | } |
179 | |
180 | return engines; |
181 | } |
182 | |
183 | KPluginInfo::List DataEngineManager::listEngineInfo(const QString &parentApp) |
184 | { |
185 | return PluginLoader::pluginLoader()->listDataEngineInfo(parentApp); |
186 | } |
187 | |
188 | KPluginInfo::List DataEngineManager::listEngineInfoByCategory(const QString &category, const QString &parentApp) |
189 | { |
190 | QString constraint = QString("[X-KDE-PluginInfo-Category] == '%1'" ).arg(category); |
191 | |
192 | if (parentApp.isEmpty()) { |
193 | constraint.append(" and not exist [X-KDE-ParentApp]" ); |
194 | } else { |
195 | constraint.append(" and [X-KDE-ParentApp] == '" ).append(parentApp).append("'" ); |
196 | } |
197 | |
198 | KService::List offers = KServiceTypeTrader::self()->query("Plasma/DataEngine" , constraint); |
199 | return KPluginInfo::fromServices(offers); |
200 | } |
201 | |
202 | void DataEngineManager::timerEvent(QTimerEvent *) |
203 | { |
204 | #ifndef NDEBUG |
205 | QString path = KGlobal::dirs()->locateLocal("appdata" , "plasma_dataenginemanager_log" ); |
206 | QFile f(path); |
207 | if (!f.open(QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text)) { |
208 | kDebug() << "faild to open" << path; |
209 | return; |
210 | } |
211 | |
212 | QTextStream out(&f); |
213 | |
214 | QHashIterator<QString, DataEngine*> it(d->engines); |
215 | out << "================================== " << KGlobal::locale()->formatDateTime(QDateTime::currentDateTime()) << endl; |
216 | while (it.hasNext()) { |
217 | it.next(); |
218 | DataEngine *engine = it.value(); |
219 | out << "DataEngine: " << it.key() << ' ' << engine << endl; |
220 | out << " Claimed # of sources: " << engine->sources().count() << endl; |
221 | out << " Actual # of sources: " << engine->containerDict().count() << endl; |
222 | out << endl << " Source Details" << endl; |
223 | |
224 | foreach (DataContainer *dc, engine->containerDict()) { |
225 | out << " * " << dc->objectName() << endl; |
226 | out << " Data count: " << dc->d->data.count() << endl; |
227 | out << " Stored: " << dc->isStorageEnabled() << ' ' << endl; |
228 | const int directs = dc->receivers(SIGNAL(dataUpdated(QString,Plasma::DataEngine::Data))); |
229 | if (directs > 0) { |
230 | out << " Direction Connections: " << directs << ' ' << endl; |
231 | } |
232 | |
233 | const int relays = dc->d->relays.count(); |
234 | if (relays > 0) { |
235 | out << " Relays: " << dc->d->relays.count() << endl; |
236 | QString times; |
237 | foreach (SignalRelay *relay, dc->d->relays) { |
238 | times.append(' ').append(QString::number(relay->m_interval)); |
239 | } |
240 | out << " Relay Timeouts: " << times << ' ' << endl; |
241 | } |
242 | } |
243 | |
244 | out << endl << "-----" << endl; |
245 | } |
246 | out << endl << endl; |
247 | #endif |
248 | // killTimer(event->timerId()); |
249 | } |
250 | |
251 | } // namespace Plasma |
252 | |
253 | #include "dataenginemanager.moc" |
254 | |