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<a href="#DeePeer.description" class="shortcut">Description</a>
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<a href="#DeePeer.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a href="#DeePeer.properties" class="shortcut">Properties</a>
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<a href="#DeePeer.signals" class="shortcut">Signals</a>
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<div class="refentry">
<a name="DeePeer"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="DeePeer.top_of_page"></a>DeePeer</span></h2>
<p>DeePeer — Finds other objects with the same swarm-name on the bus.</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="DeePeer.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <dee.h>
#define <a class="link" href="DeePeer.html#DEE-PEER-DBUS-IFACE:CAPS" title="DEE_PEER_DBUS_IFACE">DEE_PEER_DBUS_IFACE</a>
struct <a class="link" href="DeePeer.html#DeePeer-struct" title="struct DeePeer">DeePeer</a>;
struct <a class="link" href="DeePeer.html#DeePeerClass" title="struct DeePeerClass">DeePeerClass</a>;
<span class="returnvalue">GSList</span> * <a class="link" href="DeePeer.html#dee-peer-get-connections" title="dee_peer_get_connections ()">dee_peer_get_connections</a> (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);
const <span class="returnvalue">gchar</span> * <a class="link" href="DeePeer.html#dee-peer-get-swarm-leader" title="dee_peer_get_swarm_leader ()">dee_peer_get_swarm_leader</a> (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);
const <span class="returnvalue">gchar</span> * <a class="link" href="DeePeer.html#dee-peer-get-swarm-name" title="dee_peer_get_swarm_name ()">dee_peer_get_swarm_name</a> (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);
<span class="returnvalue">gboolean</span> <a class="link" href="DeePeer.html#dee-peer-is-swarm-leader" title="dee_peer_is_swarm_leader ()">dee_peer_is_swarm_leader</a> (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);
<span class="returnvalue">gboolean</span> <a class="link" href="DeePeer.html#dee-peer-is-swarm-owner" title="dee_peer_is_swarm_owner ()">dee_peer_is_swarm_owner</a> (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);
<span class="returnvalue">gchar</span> ** <a class="link" href="DeePeer.html#dee-peer-list-peers" title="dee_peer_list_peers ()">dee_peer_list_peers</a> (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);
<a class="link" href="DeePeer.html" title="DeePeer"><span class="returnvalue">DeePeer</span></a> * <a class="link" href="DeePeer.html#dee-peer-new" title="dee_peer_new ()">dee_peer_new</a> (<em class="parameter"><code>const <span class="type">gchar</span> *swarm_name</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="DeePeer.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
GObject
+----DeePeer
+----<a class="link" href="DeeClient.html" title="DeeClient">DeeClient</a>
+----<a class="link" href="DeeServer.html" title="DeeServer">DeeServer</a>
</pre>
</div>
<div class="refsect1">
<a name="DeePeer.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="DeePeer.html#DeePeer--swarm-leader" title='The "swarm-leader" property'>swarm-leader</a>" <span class="type">gchar</span>* : Read
"<a class="link" href="DeePeer.html#DeePeer--swarm-name" title='The "swarm-name" property'>swarm-name</a>" <span class="type">gchar</span>* : Read / Write / Construct
"<a class="link" href="DeePeer.html#DeePeer--swarm-owner" title='The "swarm-owner" property'>swarm-owner</a>" <span class="type">gboolean</span> : Read / Write / Construct Only
</pre>
</div>
<div class="refsect1">
<a name="DeePeer.signals"></a><h2>Signals</h2>
<pre class="synopsis">
"<a class="link" href="DeePeer.html#DeePeer-connection-acquired" title='The "connection-acquired" signal'>connection-acquired</a>" : <code class="literal">Run Last</code>
"<a class="link" href="DeePeer.html#DeePeer-connection-closed" title='The "connection-closed" signal'>connection-closed</a>" : <code class="literal">Run Last</code>
"<a class="link" href="DeePeer.html#DeePeer-peer-found" title='The "peer-found" signal'>peer-found</a>" : <code class="literal">Run Last</code>
"<a class="link" href="DeePeer.html#DeePeer-peer-lost" title='The "peer-lost" signal'>peer-lost</a>" : <code class="literal">Run Last</code>
</pre>
</div>
<div class="refsect1">
<a name="DeePeer.description"></a><h2>Description</h2>
<p>
<a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> allows you to build objects that can rendevouz on DBus
without the need for an central registration service. Think of it like
peer-to-peer for your application. The DBus session bus will also implicitly
elect a swarm leader - namely the one owning the swarm name on the bus, but
it's up to the consumer of this API to determine whether swarm leadership has
any concrete responsibilities associated.
</p>
<p>
Peers find eachother through a well-known "swarm-name", which is a
well known DBus name, such as: org.myapp.MyPeers. Choose a namespaced
name that would not normally be used outside of your program.
</p>
<p>
For example:
</p>
<div class="informalexample">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="gtkdoc opt">{</span>
DeePeer <span class="gtkdoc opt">*</span>peer<span class="gtkdoc opt">;</span>
peer <span class="gtkdoc opt">=</span> <span class="function">g_object_new</span> <span class="gtkdoc opt">(</span>DBUS_TYPE_PEER<span class="gtkdoc opt">,</span>
<span class="string">"swarm-name"</span><span class="gtkdoc opt">,</span> <span class="string">"org.myapp.MyPeers"</span><span class="gtkdoc opt">,</span>
NULL<span class="gtkdoc opt">);</span>
<span class="function">g_signal_connect</span> <span class="gtkdoc opt">(</span>peer<span class="gtkdoc opt">,</span> <span class="string">"peer-found"</span><span class="gtkdoc opt">,</span>
<span class="function">G_CALLBACK</span> <span class="gtkdoc opt">(</span>on_peer_found<span class="gtkdoc opt">),</span> NULL<span class="gtkdoc opt">);</span>
<span class="function">g_signal_connect</span> <span class="gtkdoc opt">(</span>peer<span class="gtkdoc opt">,</span> <span class="string">"peer-lost"</span><span class="gtkdoc opt">,</span>
<span class="function">G_CALLBACK</span> <span class="gtkdoc opt">(</span>on_peer_lost<span class="gtkdoc opt">),</span> NULL<span class="gtkdoc opt">);</span>
<span class="gtkdoc opt">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="DeePeer.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="DEE-PEER-DBUS-IFACE:CAPS"></a><h3>DEE_PEER_DBUS_IFACE</h3>
<pre class="programlisting">#define DEE_PEER_DBUS_IFACE "com.canonical.Dee.Peer"
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="DeePeer-struct"></a><h3>struct DeePeer</h3>
<pre class="programlisting">struct DeePeer;</pre>
<p>
All fields in the DeePeer structure are private and should never be
accessed directly
</p>
</div>
<hr>
<div class="refsect2">
<a name="DeePeerClass"></a><h3>struct DeePeerClass</h3>
<pre class="programlisting">struct DeePeerClass {
/*< signals >*/
void (*peer_found) (DeePeer *self, const gchar *name);
void (*peer_lost) (DeePeer *self, const gchar *name);
void (*connection_acquired) (DeePeer *self, GDBusConnection *connection);
void (*connection_closed) (DeePeer *self, GDBusConnection *connection);
/*< vtable >*/
const gchar* (*get_swarm_leader) (DeePeer *self);
gboolean (*is_swarm_leader) (DeePeer *self);
GSList* (*get_connections) (DeePeer *self);
gchar** (*list_peers) (DeePeer *self);
};
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="dee-peer-get-connections"></a><h3>dee_peer_get_connections ()</h3>
<pre class="programlisting"><span class="returnvalue">GSList</span> * dee_peer_get_connections (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);</pre>
<p>
Gets list of <span class="type">GDBusConnection</span> instances used by this <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> instance.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>List of connections. <span class="annotation">[<acronym title="Free data container after the code is done."><span class="acronym">transfer container</span></acronym>][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> Gio.DBusConnection]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="dee-peer-get-swarm-leader"></a><h3>dee_peer_get_swarm_leader ()</h3>
<pre class="programlisting">const <span class="returnvalue">gchar</span> * dee_peer_get_swarm_leader (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);</pre>
<p>
In case this peer is connected to a message bus, gets the unique DBus
address of the current swarm leader, otherwise returns id of the leader.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Unique DBus address of the current swarm leader,
possibly <code class="literal">NULL</code> if the leader has not been detected yet</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="dee-peer-get-swarm-name"></a><h3>dee_peer_get_swarm_name ()</h3>
<pre class="programlisting">const <span class="returnvalue">gchar</span> * dee_peer_get_swarm_name (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);</pre>
<p>
Gets the unique name for this swarm. The swarm leader is the Peer owning
this name on the session bus.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The swarm name</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="dee-peer-is-swarm-leader"></a><h3>dee_peer_is_swarm_leader ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span> dee_peer_is_swarm_leader (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);</pre>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if and only if this peer owns the swarm name on
the session bus</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="dee-peer-is-swarm-owner"></a><h3>dee_peer_is_swarm_owner ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span> dee_peer_is_swarm_owner (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);</pre>
<p>
Gets the value of the :swarm-owner property.
</p>
<p>
Note that this does NOT mean that the peer is leader of the swarm! Check also
<a class="link" href="DeePeer.html#dee-peer-is-swarm-leader" title="dee_peer_is_swarm_leader ()"><code class="function">dee_peer_is_swarm_leader()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the :swarm-owner property was set during construction.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="dee-peer-list-peers"></a><h3>dee_peer_list_peers ()</h3>
<pre class="programlisting"><span class="returnvalue">gchar</span> ** dee_peer_list_peers (<em class="parameter"><code><a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self</code></em>);</pre>
<p>
Gets list of all peers currently in this swarm.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>List of peers (free using <code class="function">g_strfreev()</code>). <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="dee-peer-new"></a><h3>dee_peer_new ()</h3>
<pre class="programlisting"><a class="link" href="DeePeer.html" title="DeePeer"><span class="returnvalue">DeePeer</span></a> * dee_peer_new (<em class="parameter"><code>const <span class="type">gchar</span> *swarm_name</code></em>);</pre>
<p>
Create a new <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a>. The peer will immediately connect to the swarm
and start the peer discovery.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>swarm_name</code></em> :</span></p></td>
<td>The name of the swarm to join.
Fx "org.example.DataProviders"</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly constructed <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a>.
Free with <code class="function">g_object_unref()</code>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="DeePeer.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="DeePeer--swarm-leader"></a><h3>The <code class="literal">"swarm-leader"</code> property</h3>
<pre class="programlisting"> "swarm-leader" <span class="type">gchar</span>* : Read</pre>
<p>Unique DBus address of the swarm leader.</p>
<p>Default value: NULL</p>
</div>
<hr>
<div class="refsect2">
<a name="DeePeer--swarm-name"></a><h3>The <code class="literal">"swarm-name"</code> property</h3>
<pre class="programlisting"> "swarm-name" <span class="type">gchar</span>* : Read / Write / Construct</pre>
<p>Well-known name to find other peers with.</p>
<p>Default value: NULL</p>
</div>
<hr>
<div class="refsect2">
<a name="DeePeer--swarm-owner"></a><h3>The <code class="literal">"swarm-owner"</code> property</h3>
<pre class="programlisting"> "swarm-owner" <span class="type">gboolean</span> : Read / Write / Construct Only</pre>
<p>Try to assume leadership of the swarm.</p>
<p>Default value: FALSE</p>
</div>
</div>
<div class="refsect1">
<a name="DeePeer.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="DeePeer-connection-acquired"></a><h3>The <code class="literal">"connection-acquired"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *deepeer,
<span class="type">GDBusConnection</span> *arg1,
<span class="type">gpointer</span> user_data) : <code class="literal">Run Last</code></pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>deepeer</code></em> :</span></p></td>
<td>the object which received the signal.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="DeePeer-connection-closed"></a><h3>The <code class="literal">"connection-closed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self,
<span class="type">GDBusConnection</span> *connection,
<span class="type">gpointer</span> user_data) : <code class="literal">Run Last</code></pre>
<p>
Connect to this signal to be notified when peers close
their <span class="type">GDBusConnection</span>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>the <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> on which the signal is emitted</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>connection</code></em> :</span></p></td>
<td>the closed <span class="type">GDBusConnection</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="DeePeer-peer-found"></a><h3>The <code class="literal">"peer-found"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self,
<span class="type">gchar</span> *name,
<span class="type">gpointer</span> user_data) : <code class="literal">Run Last</code></pre>
<p>
Connect to this signal to be notified of existing and new peers that are
in your swarm.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>the <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> on which the signal is emitted</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the DBus name of the object found</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="DeePeer-peer-lost"></a><h3>The <code class="literal">"peer-lost"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> *self,
<span class="type">gchar</span> *name,
<span class="type">gpointer</span> user_data) : <code class="literal">Run Last</code></pre>
<p>
Connect to this signal to be notified when peers disconnect from the swarm
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>the <a class="link" href="DeePeer.html" title="DeePeer"><span class="type">DeePeer</span></a> on which the signal is emitted</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the DBus name of the object that disconnected</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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