Strigi desktop-integration
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This document discusses Strigi, a desktop search engine for KDE. It describes Strigi's features like being fast, lightweight and extensible. It explains how to interact with Strigi using socket or D-Bus interfaces. It also introduces JStreams, which allows accessing compressed files easily. Strigi has clients for different desktops and can be integrated into applications via its interfaces. The document envisions further improving Strigi's clients and user experience.
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Strigi desktop-integration
- 1. Strigi Desktop integration Flavio Castelli
- 2. Strigi desktop integration FOSDEM 2007 Why choose Strigi Strigi's main features ● fast and lightweight ● portable ● extensible ● next KDE4 desktop searching engine ● can be easily accessed from external programs Flavio Castelli
- 3. Strigi desktop integration FOSDEM 2007 What can be done by Strigi Strigi's capabilities ● perform fast searches across heterogeneous data collections ● extract metadata informations from files ● index compressed archives contents ● create/recreate/discover relations between different data Flavio Castelli
- 4. Strigi desktop integration FOSDEM 2007 How to interact with Strigi Strigi communication interfaces socket DBus Flavio Castelli
- 5. Strigi desktop integration FOSDEM 2007 How to interact with Strigi Socket interface Benefits: ● well known mechanism ● can be accessed from different languages / OS Drawbacks: ● actually has less priority --> it isn't fully tested Flavio Castelli
- 6. Strigi desktop integration FOSDEM 2007 How to interact with Strigi DBus interface The best way to access Strigi features: ● simple and fast to use ● IPC protocol used by KDE4 and Gnome ● there are lots of DBus bindings ● actively developed Flavio Castelli
- 7. Strigi desktop integration FOSDEM 2007 How to interact with Strigi Available functions Everything can be performed through the socket and DBus interfaces: ● start/stop Strigi daemon ● add/remove filters ● force index updates ● index a specific resource ● perform searches (and retrieve results ;) Flavio Castelli
- 8. Strigi desktop integration FOSDEM 2007 How to interact with Strigi Available classes for C++ developers Existing C++ classes for playing with Strigi: ● AsyncSocketClient: access socket interface ● DBusClientInterface: access DBus interface Automatically shipped with Strigi installation Flavio Castelli
- 9. Strigi desktop integration FOSDEM 2007 Strigi Clients “main” clients Their code can be taken as example: ● StrigiClient: ● written in C++ ● uses Qt4 ● connection through Dbus interface ● StrigiApplet: ● written in C++ ● uses KDE3 libs ● connection through socket interface Flavio Castelli
- 10. Strigi desktop integration FOSDEM 2007 Strigi Clients Strigi's Gnome DeskBar handler Flavio Castelli
- 11. Strigi desktop integration FOSDEM 2007 Strigi Clients Strigi's Gnome DeskBar handler Features: ● written in python ● communicate using DBus interface ● only 95 lines of code Strigi integration is easy Flavio Castelli
- 12. Strigi desktop integration FOSDEM 2007 JStreams Really short description What are JStreams: ● a C++ “transposition” of Java InputStream childs public StreamDemo(URL url) throws IOException { InputStream filestream = url.openStream(); ZipInputStream zipstream = new ZipInputStream(filestream); ZipEntry entry = zipstream.getNextEntry(); while (entry != null) { handleEntry(zipstream, entry); } } Flavio Castelli
- 13. Strigi desktop integration FOSDEM 2007 JStreams The power of JStreams ● flexible: can be extended for supporting new file types ● really fast (especially while accessing compressed archives) ● easy to use ● code reuse: can be used by other programs with ease Flavio Castelli
- 14. Strigi desktop integration FOSDEM 2007 JStreams JStreams actual status More relevant file types: ● compressed archives: tar, gzip, bz2, ar,... ● linux distribution packages: deb, rpm,... ● pdf files ● email ● ... Flavio Castelli
- 15. Strigi desktop integration FOSDEM 2007 Use JStreams A simple example Flavio Castelli
- 16. Strigi desktop integration FOSDEM 2007 Use JStreams QClient Simple Qt4 program that uses JStreams: ● navigate through archive files ● can open archive file contents How can be done ? Flavio Castelli
- 17. Strigi desktop integration FOSDEM 2007 Use JStreams QArchiveEngine Class QAbstracFileEngine ArchiveEngineBase Access archive files as directories ArchiveEngine Flavio Castelli
- 18. Strigi desktop integration FOSDEM 2007 Use JStreams QArchiveEngine Class For accessing compressed files as directories: ● create a new QAbstractFileEngine child ● use JStreams inside it ● register the new engine All Qt classes that provides file system access will use it whenever it's possible Flavio Castelli
- 19. Strigi desktop integration FOSDEM 2007 Use JStreams into KDE JStreams and KDE Also KDE programs can use JStreams functionalities: JStreams KIOSlave ● Available for KDE3 ● Already into KDE4 trunk Flavio Castelli
- 20. Strigi desktop integration FOSDEM 2007 Use JStreams into KDE JStream KIOSLAVE Flavio Castelli
- 21. Strigi desktop integration FOSDEM 2007 Conclusions Interact with Strigi ● use Strigi's features is really simple ● it can be done from: ● different programming languages ● different window managers ● different OS ● you can use Strigi for: ● desktop searching tasks ● fast and simple access to a large set of file types Flavio Castelli
- 22. Strigi desktop integration FOSDEM 2007 Conclusions Strigi's integration Actually we cover a good set of SCENARIO ● StrigiClient: generic window manager ● StrigiApplet: kde client ● Gnome DeskBar handler: self-explaining In the near future: ● a KDE4 Plasmoid client Flavio Castelli
- 23. Strigi desktop integration FOSDEM 2007 Conclusions Strigi's integration: the future... There is lot of work to be done on the client-side: ● keep improving actual interfaces ● improve usability & integration ● create a better user experience create a better user experience Flavio Castelli