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<?xml version="1.0" ?>
<node name="/Connection_Interface_Keepalive"
xmlns:tp="http://telepathy.freedesktop.org/wiki/DbusSpec#extensions-v0">
<tp:copyright>Copyright © 2010 Collabora Ltd.</tp:copyright>
<tp:copyright>Copyright © 2010 Nokia Corporation</tp:copyright>
<tp:license xmlns="http://www.w3.org/1999/xhtml">
<p>This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.</p>
<p>This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.</p>
<p>You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.</p>
</tp:license>
<interface name="im.telepathy1.Connection.Interface.Keepalive1"
tp:causes-havoc="experimental">
<tp:requires interface="im.telepathy1.Connection"/>
<tp:added version="0.21.2">(draft 1)</tp:added>
<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
<p>Most messaging protocols allow the client to send periodic
content-less pings to the server when the connection is otherwise idle,
to reassure both itself and the server that its connection is still
alive. Depending on the nature of the network connection, and the
device running the client, the desired interval between such pings may
vary.</p>
<tp:rationale>
<p>For instance, on a mobile handset connected via 3G,
overly-frequent keepalives can drain the battery through needlessly
waking up the radio, and a relatively high interval is appropiate. By
contrast, a desktop computer is less likely to be asleep in the first
place, and users expect dropped connections to be noticed as soon as
possible.</p>
</tp:rationale>
<p>This interface provides a
<tp:member-ref>KeepaliveInterval</tp:member-ref> property which
controls the frequency of keepalive pings, if any. Connection managers
implementing this property should also include it in <tp:dbus-ref
namespace='im.telepathy1'>Protocol.Parameters</tp:dbus-ref>
with the <code>DBus_Property</code> flag, allowing the desired value to
be stored in <tp:dbus-ref
namespace='im.telepathy1'>Account.Parameters</tp:dbus-ref>
and passed onto the connection by the account manager.</p>
</tp:docstring>
<property name="KeepaliveInterval" type="u" access="readwrite"
tp:name-for-bindings="Keepalive_Interval"
tp:is-connection-parameter='och aye'>
<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
<p>The time in seconds between pings sent to the server to ensure that
the connection is still alive, or <tt>0</tt> to disable such
pings.</p>
<p>This property (and parameter) supersedes the older
<tt>keepalive-interval</tt>
<tp:type>Connection_Parameter_Name</tp:type>.</p>
</tp:docstring>
</property>
</interface>
</node>
<!-- vim:set sw=2 sts=2 et ft=xml: -->
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