< IUP ISI | MediaWiki-SilkRevision as of 15:34, 21 October 2010 by Gpaumier (talk | contribs) (fmt)(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) Contents 1 Introduction 2 Choice architecture 3 Technical contacts requirements 4 MediaWiki UML Introduction API The API is composed of some classes (UserGroup, Namespace, General, Page...) and a MediaWiki class to access data. Library architecture at the begining The library is composed of a unique class: MediaWiki. Choice architecture Synchronous or asynchronous? Synchronous Advantage No signals in the public API Disadvantage Multi-threads when used in interface to avoid freeze Latency troubles may increase waiting Asynchronous Advantage Don’t block the interface Disadvantage Wait the signal to access to the result Develop Unique class vs multiple classes? Unique class Advantage No memory managing The request calls are normal : wiki->allpagesRequest() Disadvantage Readability Multiple classes Advantage Readability Disadvantage The memory management Technical contacts requirements First, the technical contacts want a asynchronous interface: ”Even if you use a QEventLoop,you'll often need different threads in the application, and those can be a bitch. You can have a look at the current MediaWiki class to how those signals / slots should look like.” Secondly, to call a request, the code should look like: MediaWiki * mw = new MediaWiki(“mon_url”); mw->allpagesRequest(); connect(mw, SIGNAL(allpagesResult(QList<MediaWiki::Page>)), SLOT(allpagesProcess(QList<MediaWiki::Page>)); MediaWiki UML MediaWiki The MediaWiki class allows developers to call asynchronous request to access the MediaWiki data. For this, developers call a request like allpagesRequest() who send the request with the QNetworkAccessManager. To process the result, developers connect the signal allpagesResult() with his own slot. Because the class MediaWiki needs to emit signals, MediaWiki inherit QObject. Why don’t separate the code To follow the first development of the MediaWiki class and with the agreement of the technical contacts, we don’t separate MediaWiki and its requests. Who manages the memory? There is one class, so the library can manage the memory. Why QNetworkAccessManager? It’s the Qt class for HTTP requests and it is asynchronous. By the way, we can use this class in a synchronous way using QEventLoop. KDE library? At this time, we don’t use KDE library because Qt provides the necessary. Namespace To avoid name conflicts with others libraries, we propose to define a namespace like silk::. mediawiki:: was a possibility but there will be a redundancy (mediawiki::MediaWiki). Binary compatibility For ensure the binary compatibility, we’ll use only a pointer to MediaWikiPrivate, which will contain attributes. In this case, modify the attributes doesn’t fail a class which uses MediaWiki. Retrieved from "https://community.kde.org/index.php?title=IUP_ISI/MediaWiki-Silk/Architecture&oldid=5589" Content is available under Creative Commons License SA 4.0 unless otherwise noted.