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<div class="chapter">
<div class="titlepage"><div><div><h2 class="title">
-<a name="id594673"></a>Migrating to GDBus</h2></div></div></div>
+<a name="idp10500944"></a>Migrating from GConf to GSettings</h2></div></div></div>
<div class="toc"><dl>
-<dt><span class="section"><a href="ch30.html#id1095827">Conceptual differences</a></span></dt>
-<dt><span class="section"><a href="ch30s02.html">API comparison</a></span></dt>
-<dt><span class="section"><a href="ch30s03.html">Owning bus names</a></span></dt>
-<dt><span class="section"><a href="ch30s04.html">Creating proxies for well-known names</a></span></dt>
-<dt><span class="section"><a href="ch30s05.html">Generating code and docs</a></span></dt>
-<dd><dl>
-<dt><span class="section"><a href="ch30s05.html#gdbus-example-gdbus-codegen">Using gdbus-codegen</a></span></dt>
-<dt>
-<span class="refentrytitle"><a href="gdbus-org.gtk.GDBus.Example.ObjectManager.Animal.html">org.gtk.GDBus.Example.ObjectManager.Animal</a></span><span class="refpurpose"> — Example docs generated by gdbus-codegen</span>
-</dt>
-<dt>
-<span class="refentrytitle"><a href="gdbus-org.gtk.GDBus.Example.ObjectManager.Cat.html">org.gtk.GDBus.Example.ObjectManager.Cat</a></span><span class="refpurpose"> — More example docs generated by gdbus-codegen</span>
-</dt>
-<dt>
-<span class="refentrytitle"><a href="ExampleAnimal.html">ExampleAnimal</a></span><span class="refpurpose"> — Generated C code for the org.gtk.GDBus.Example.ObjectManager.Animal D-Bus interface</span>
-</dt>
-<dt>
-<span class="refentrytitle"><a href="ExampleCat.html">ExampleCat</a></span><span class="refpurpose"> — Generated C code for the org.gtk.GDBus.Example.ObjectManager.Cat D-Bus interface</span>
-</dt>
-<dt>
-<span class="refentrytitle"><a href="ExampleObject.html">ExampleObject</a></span><span class="refpurpose"> — Specialized GDBusObject types</span>
-</dt>
-<dt>
-<span class="refentrytitle"><a href="ExampleObjectManagerClient.html">ExampleObjectManagerClient</a></span><span class="refpurpose"> — Generated GDBusObjectManagerClient type</span>
-</dt>
-</dl></dd>
+<dt><span class="section"><a href="ch30.html#idp35318128">Before you start</a></span></dt>
+<dt><span class="section"><a href="ch30s02.html">Conceptual differences</a></span></dt>
+<dt><span class="section"><a href="ch30s03.html">GConfClient (and GConfBridge) API conversion</a></span></dt>
+<dt><span class="section"><a href="ch30s04.html">Change notification</a></span></dt>
+<dt><span class="section"><a href="ch30s05.html">Change sets</a></span></dt>
+<dt><span class="section"><a href="ch30s06.html">Schema conversion</a></span></dt>
+<dt><span class="section"><a href="ch30s07.html">Data conversion</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
-<a name="id1095827"></a>Conceptual differences</h2></div></div></div>
+<a name="idp35318128"></a>Before you start</h2></div></div></div>
<p>
- The central concepts of D-Bus are modelled in a very similar way
- in dbus-glib and GDBus. Both have a objects representing connections,
- proxies and method invocations. But there are some important
- differences:
+ Converting individual applications and their settings from GConf to
+ GSettings can be done at will. But desktop-wide settings like font or
+ theme settings often have consumers in multiple modules. Therefore,
+ some consideration has to go into making sure that all users of a setting
+ are converted to GSettings at the same time or that the program
+ responsible for configuring that setting continues to update the value in
+ both places.
</p>
-<div class="itemizedlist"><ul class="itemizedlist" type="disc">
-<li class="listitem"><p>
- dbus-glib uses the <a class="ulink" href="http://www.freedesktop.org/wiki/Software/dbus#ReferenceImplementation.28dbus-daemonandlibdbus.29" target="_top">libdbus
- reference implementation</a>, GDBus doesn't. Instead, it
- relies on GIO streams as transport layer, and has its own
- implementation for the the D-Bus connection setup and
- authentication. Apart from using streams as transport,
- avoiding libdbus also lets GDBus avoid some thorny
- multithreading issues.
- </p></li>
-<li class="listitem"><p>
- dbus-glib uses the GObject type system for method arguments and
- return values, including a homegrown container specialization
- mechanism. GDBus relies on the <a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> type system which is
- explicitly designed to match D-Bus types.
- </p></li>
-<li class="listitem"><p>
- dbus-glib models only D-Bus interfaces and does not provide
- any types for objects. GDBus models both D-Bus interfaces
- (via the <a class="link" href="GDBusInterface.html" title="GDBusInterface"><span class="type">GDBusInterface</span></a>, <a class="link" href="GDBusProxy.html" title="GDBusProxy"><span class="type">GDBusProxy</span></a> and
- <a class="link" href="GDBusInterfaceSkeleton.html" title="GDBusInterfaceSkeleton"><span class="type">GDBusInterfaceSkeleton</span></a> types) and objects (via the
- <a class="link" href="GDBusObject.html" title="GDBusObject"><span class="type">GDBusObject</span></a>, <a class="link" href="GDBusObjectSkeleton.html" title="GDBusObjectSkeleton"><span class="type">GDBusObjectSkeleton</span></a> and <a class="link" href="GDBusObjectProxy.html" title="GDBusObjectProxy"><span class="type">GDBusObjectProxy</span></a> types).
- </p></li>
-<li class="listitem"><p>
- GDBus includes native support for the <a class="ulink" href="http://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-properties" target="_top">org.freedesktop.DBus.Properties</a> (via the <a class="link" href="GDBusProxy.html" title="GDBusProxy"><span class="type">GDBusProxy</span></a> type) and <a class="ulink" href="http://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-objectmanager" target="_top">org.freedesktop.DBus.ObjectManager</a> D-Bus interfaces, dbus-glib doesn't.
- </p></li>
-<li class="listitem"><p>
- The typical way to export an object in dbus-glib involves
- generating glue code from XML introspection data using
- <span class="command"><strong>dbus-binding-tool</strong></span>. GDBus provides a
- similar tool called <span class="command"><strong><a href="gdbus-codegen.html">gdbus-codegen</a></strong></span> that
- can also generate Docbook D-Bus interface documentation.
- </p></li>
-<li class="listitem"><p>
- dbus-glib doesn't provide any convenience API for owning and
- watching bus names, GDBus provides the <a class="link" href="gio-Owning-Bus-Names.html#g-bus-own-name" title="g_bus_own_name ()"><code class="function">g_bus_own_name()</code></a> and
- <a class="link" href="gio-Watching-Bus-Names.html#g-bus-watch-name" title="g_bus_watch_name ()"><code class="function">g_bus_watch_name()</code></a> family of convenience functions.
- </p></li>
-<li class="listitem"><p>
- GDBus provides API to parse, generate and work with <a class="link" href="gio-D-Bus-Introspection-Data.html" title="D-Bus Introspection Data">Introspection
- XML</a>, dbus-glib doesn't.
- </p></li>
-</ul></div>
<p>
- </p>
+ It is always a good idea to have a look at how others have handled
+ similar problems before. An examplaric conversion can be found e.g.
+ in the <a class="ulink" href="http://git.gnome.org/browse/gnome-utils/log/?h=gsettings-tutorial" target="_top">gsettings-tutorial</a> branch of gnome-utils.
+ </p>
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