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  22 <div class="chapter" title="Migrating from dbus-glib to GDBus">
  23 <div class="titlepage"><div><div><h2 class="title">
  24 <a name="id586289"></a>Migrating from dbus-glib to GDBus</h2></div></div></div>
  25 <div class="toc"><dl>
  26 <dt><span class="section"><a href="ch28.html#id748567">Conceptual differences</a></span></dt>
  27 <dt><span class="section"><a href="ch28s02.html">API comparison</a></span></dt>
  28 <dt><span class="section"><a href="ch28s03.html">Owning bus names</a></span></dt>
  29 <dt><span class="section"><a href="ch28s04.html">Creating proxies for well-known names</a></span></dt>
  30 <dt><span class="section"><a href="ch28s05.html">Client-side GObject bindings</a></span></dt>
  31 <dt><span class="section"><a href="ch28s06.html">Exporting objects</a></span></dt>
  32 </dl></div>
  33 <div class="section" title="Conceptual differences">
  34 <div class="titlepage"><div><div><h2 class="title" style="clear: both">
  35 <a name="id748567"></a>Conceptual differences</h2></div></div></div>
  36 <p>
  37       The central concepts of D-Bus are modelled in a very similar way
  38       in dbus-glib and GDBus. Both have a objects representing connections,
  39       proxies and method invocations. But there are some important
  40       differences:
  41       </p>
  42 <div class="itemizedlist"><ul class="itemizedlist" type="disc">
  43 <li class="listitem"><p>
  44           dbus-glib uses libdbus, GDBus doesn't. Instead, it relies on GIO
  45           streams as transport layer, and has its own implementation for the
  46           the D-Bus connection setup and authentication. Apart from using
  47           streams as transport, avoiding libdbus also lets GDBus avoid some
  48           thorny multithreading issues.
  49         </p></li>
  50 <li class="listitem"><p>
  51           dbus-glib uses the GObject type system for method arguments and
  52           return values, including a homegrown container specialization
  53           mechanism. GDBus relies uses the <a href="/home/desrt/local/share/gtk-doc/html/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> type system which is
  54           explicitly designed to match D-Bus types.
  55         </p></li>
  56 <li class="listitem"><p>
  57           The typical way to export an object in dbus-glib involves generating
  58           glue code from XML introspection data using <span class="command"><strong>dbus-binding-tool</strong></span>. GDBus does not (yet?) use code generation; you are expected to
  59           embed the introspection data in your application code.
  60         </p></li>
  61 </ul></div>
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