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<div class="refentry">
<a name="InfAdoptedSession"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="InfAdoptedSession.top_of_page"></a>InfAdoptedSession</span></h2>
<p>InfAdoptedSession — Session handling concurrency control via the adOPTed
algorithm.</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="InfAdoptedSession.stability-level"></a><h2>Stability Level</h2>
<a href="http://foldoc.org/Unstable"><span class="acronym">Unstable</span></a>, unless otherwise indicated
</div>
<div class="refsect1">
<a name="InfAdoptedSession.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="InfIo.html" title="InfIo"><span class="returnvalue">InfIo</span></a> *
</td>
<td class="function_name">
<a class="link" href="InfAdoptedSession.html#inf-adopted-session-get-io" title="inf_adopted_session_get_io ()">inf_adopted_session_get_io</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="returnvalue">InfAdoptedAlgorithm</span></a> *
</td>
<td class="function_name">
<a class="link" href="InfAdoptedSession.html#inf-adopted-session-get-algorithm" title="inf_adopted_session_get_algorithm ()">inf_adopted_session_get_algorithm</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="InfAdoptedSession.html#inf-adopted-session-broadcast-request" title="inf_adopted_session_broadcast_request ()">inf_adopted_session_broadcast_request</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="InfAdoptedSession.html#inf-adopted-session-undo" title="inf_adopted_session_undo ()">inf_adopted_session_undo</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="InfAdoptedSession.html#inf-adopted-session-redo" title="inf_adopted_session_redo ()">inf_adopted_session_redo</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="InfAdoptedSession.html#inf-adopted-session-read-request-info" title="inf_adopted_session_read_request_info ()">inf_adopted_session_read_request_info</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="InfAdoptedSession.html#inf-adopted-session-write-request-info" title="inf_adopted_session_write_request_info ()">inf_adopted_session_write_request_info</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.properties"></a><h2>Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type">
<a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="type">InfAdoptedAlgorithm</span></a> *</td>
<td class="property_name"><a class="link" href="InfAdoptedSession.html#InfAdoptedSession--algorithm" title="The “algorithm” property">algorithm</a></td>
<td class="property_flags">Read</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="InfIo.html" title="InfIo"><span class="type">InfIo</span></a> *</td>
<td class="property_name"><a class="link" href="InfAdoptedSession.html#InfAdoptedSession--io" title="The “io” property">io</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
<tr>
<td class="property_type"><span class="type">guint</span></td>
<td class="property_name"><a class="link" href="InfAdoptedSession.html#InfAdoptedSession--max-total-log-size" title="The “max-total-log-size” property">max-total-log-size</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.signals"></a><h2>Signals</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="signals_return">
<col width="300px" class="signals_name">
<col width="200px" class="signals_flags">
</colgroup>
<tbody><tr>
<td class="signal_type"><span class="returnvalue">gboolean</span></td>
<td class="signal_name"><a class="link" href="InfAdoptedSession.html#InfAdoptedSession-check-request" title="The “check-request” signal">check-request</a></td>
<td class="signal_flags">Run Last</td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="InfAdoptedSession.html#InfAdoptedSessionError" title="enum InfAdoptedSessionError">InfAdoptedSessionError</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="InfAdoptedSession.html#InfAdoptedSession-struct" title="struct InfAdoptedSession">InfAdoptedSession</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="InfAdoptedSession.html#InfAdoptedSessionClass" title="struct InfAdoptedSessionClass">InfAdoptedSessionClass</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> GObject
<span class="lineart">╰──</span> <a class="link" href="InfSession.html" title="InfSession">InfSession</a>
<span class="lineart">╰──</span> InfAdoptedSession
</pre>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
InfAdoptedSession implements
<a class="link" href="InfCommunicationObject.html" title="InfCommunicationObject">InfCommunicationObject</a>.</p>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <libinfinity/adopted/inf-adopted-session.h>
</pre>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.description"></a><h2>Description</h2>
<p><a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> handles concurrency control with an <a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="type">InfAdoptedAlgorithm</span></a>
on top of a <a class="link" href="InfSession.html" title="InfSession"><span class="type">InfSession</span></a>. It takes care of sending all necessary information
to joining users, receives requests from the network (passing them to
<a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="type">InfAdoptedAlgorithm</span></a>) and transfers local requests to the other users. It
also makes sure to periodically send the state the local host is in to
other uses even if the local users are idle (which is required for others
to cleanup their request logs and request caches).</p>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="inf-adopted-session-get-io"></a><h3>inf_adopted_session_get_io ()</h3>
<pre class="programlisting"><a class="link" href="InfIo.html" title="InfIo"><span class="returnvalue">InfIo</span></a> *
inf_adopted_session_get_io (<em class="parameter"><code><a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> *session</code></em>);</pre>
<p>Returns the <a class="link" href="InfIo.html" title="InfIo"><span class="type">InfIo</span></a> object of <em class="parameter"><code>session</code></em>
.</p>
<div class="refsect3">
<a name="id-1.4.2.12.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>session</p></td>
<td class="parameter_description"><p>A <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.2.12.2.6"></a><h4>Returns</h4>
<p> A <a class="link" href="InfIo.html" title="InfIo"><span class="type">InfIo</span></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="inf-adopted-session-get-algorithm"></a><h3>inf_adopted_session_get_algorithm ()</h3>
<pre class="programlisting"><a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="returnvalue">InfAdoptedAlgorithm</span></a> *
inf_adopted_session_get_algorithm (<em class="parameter"><code><a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> *session</code></em>);</pre>
<p>Returns the <a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="type">InfAdoptedAlgorithm</span></a> object of <em class="parameter"><code>session</code></em>
. Returns <code class="literal">NULL</code> if
<em class="parameter"><code>session</code></em>
has status <a class="link" href="InfSession.html#INF-SESSION-PRESYNC:CAPS"><code class="literal">INF_SESSION_PRESYNC</code></a> or <a class="link" href="InfSession.html#INF-SESSION-SYNCHRONIZING:CAPS"><code class="literal">INF_SESSION_SYNCHRONIZING</code></a>
because there the algorithm object is not yet created before successful
synchronization.</p>
<div class="refsect3">
<a name="id-1.4.2.12.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>session</p></td>
<td class="parameter_description"><p>A <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.2.12.3.6"></a><h4>Returns</h4>
<p> A <a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="type">InfAdoptedAlgorithm</span></a>, or <code class="literal">NULL</code>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="inf-adopted-session-broadcast-request"></a><h3>inf_adopted_session_broadcast_request ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
inf_adopted_session_broadcast_request (<em class="parameter"><code><a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> *session</code></em>,
<em class="parameter"><code><a class="link" href="InfAdoptedRequest.html" title="InfAdoptedRequest"><span class="type">InfAdoptedRequest</span></a> *request</code></em>);</pre>
<p>Sends a request to all subscribed connections. The request should originate
from a call to <code class="function">inf_adopted_algorithm_generate_request_noexec()</code>,
<a class="link" href="InfAdoptedAlgorithm.html#inf-adopted-algorithm-generate-request" title="inf_adopted_algorithm_generate_request ()"><code class="function">inf_adopted_algorithm_generate_request()</code></a>,
<code class="function">inf_adopted_algorithm_generate_undo()</code> or
<code class="function">inf_adopted_algorithm_generate_redo()</code> with <em class="parameter"><code>session</code></em>
's <a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="type">InfAdoptedAlgorithm</span></a>.</p>
<div class="refsect3">
<a name="id-1.4.2.12.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>session</p></td>
<td class="parameter_description"><p>A <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>request</p></td>
<td class="parameter_description"><p>A <a class="link" href="InfAdoptedRequest.html" title="InfAdoptedRequest"><span class="type">InfAdoptedRequest</span></a> obtained from <em class="parameter"><code>session</code></em>
's algorithm.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="inf-adopted-session-undo"></a><h3>inf_adopted_session_undo ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
inf_adopted_session_undo (<em class="parameter"><code><a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> *session</code></em>,
<em class="parameter"><code><a class="link" href="InfAdoptedUser.html" title="InfAdoptedUser"><span class="type">InfAdoptedUser</span></a> *user</code></em>,
<em class="parameter"><code><span class="type">guint</span> n</code></em>);</pre>
<p>This is a shortcut for creating <em class="parameter"><code>n</code></em>
undo requests and broadcasting them.
If <em class="parameter"><code>n</code></em>
> 1 then this is also more efficient.</p>
<div class="refsect3">
<a name="id-1.4.2.12.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>session</p></td>
<td class="parameter_description"><p>A <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user</p></td>
<td class="parameter_description"><p>A local <a class="link" href="InfAdoptedUser.html" title="InfAdoptedUser"><span class="type">InfAdoptedUser</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p>The number of undo requests to issue.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="inf-adopted-session-redo"></a><h3>inf_adopted_session_redo ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
inf_adopted_session_redo (<em class="parameter"><code><a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> *session</code></em>,
<em class="parameter"><code><a class="link" href="InfAdoptedUser.html" title="InfAdoptedUser"><span class="type">InfAdoptedUser</span></a> *user</code></em>,
<em class="parameter"><code><span class="type">guint</span> n</code></em>);</pre>
<p>This is a shortcut for creating <em class="parameter"><code>n</code></em>
redo requests and broadcasting them.
If <em class="parameter"><code>n</code></em>
> 1 then this is also more efficient.</p>
<div class="refsect3">
<a name="id-1.4.2.12.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>session</p></td>
<td class="parameter_description"><p>A <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user</p></td>
<td class="parameter_description"><p>A local <a class="link" href="InfAdoptedUser.html" title="InfAdoptedUser"><span class="type">InfAdoptedUser</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p>The number of redo requests to issue.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="inf-adopted-session-read-request-info"></a><h3>inf_adopted_session_read_request_info ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
inf_adopted_session_read_request_info (<em class="parameter"><code><a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> *session</code></em>,
<em class="parameter"><code><span class="type">xmlNodePtr</span> xml</code></em>,
<em class="parameter"><code><a class="link" href="InfAdoptedStateVector.html" title="InfAdoptedStateVector"><span class="type">InfAdoptedStateVector</span></a> *diff_vec</code></em>,
<em class="parameter"><code><a class="link" href="InfAdoptedUser.html" title="InfAdoptedUser"><span class="type">InfAdoptedUser</span></a> **user</code></em>,
<em class="parameter"><code><a class="link" href="InfAdoptedStateVector.html" title="InfAdoptedStateVector"><span class="type">InfAdoptedStateVector</span></a> **time</code></em>,
<em class="parameter"><code><span class="type">xmlNodePtr</span> *operation</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>This function reads common information such as the state vector the request
was made and the user that made the request from XML. It is most likely to
be used by implementations of the xml_to_request virtual function.</p>
<div class="refsect3">
<a name="id-1.4.2.12.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>session</p></td>
<td class="parameter_description"><p>A <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>xml</p></td>
<td class="parameter_description"><p>The XML to read the data from.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>diff_vec</p></td>
<td class="parameter_description"><p>The reference vector of the time vector of the request, or
<code class="literal">NULL</code>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user</p></td>
<td class="parameter_description"><p>Location to store the user of the request, or <code class="literal">NULL</code>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>time</p></td>
<td class="parameter_description"><p>Location to store the state the request was made, or <code class="literal">NULL</code>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>operation</p></td>
<td class="parameter_description"><p>Location to store the operation of the request, or <code class="literal">NULL</code>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Location to place an error, if any.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.2.12.7.6"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the data could be read successfully, <code class="literal">FALSE</code> if the XML
request does not contain valid request data, in which case <em class="parameter"><code>error</code></em>
is set.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="inf-adopted-session-write-request-info"></a><h3>inf_adopted_session_write_request_info ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
inf_adopted_session_write_request_info
(<em class="parameter"><code><a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> *session</code></em>,
<em class="parameter"><code><a class="link" href="InfAdoptedRequest.html" title="InfAdoptedRequest"><span class="type">InfAdoptedRequest</span></a> *request</code></em>,
<em class="parameter"><code><a class="link" href="InfAdoptedStateVector.html" title="InfAdoptedStateVector"><span class="type">InfAdoptedStateVector</span></a> *diff_vec</code></em>,
<em class="parameter"><code><span class="type">xmlNodePtr</span> xml</code></em>,
<em class="parameter"><code><span class="type">xmlNodePtr</span> operation</code></em>);</pre>
<p>This function writes common data from <em class="parameter"><code>request</code></em>
, such as the user that
issued the request and the state in which the request was made into <em class="parameter"><code>xml</code></em>
.
If <em class="parameter"><code>diff_vec</code></em>
is given, then the state is written as a diff to this vector,
see <a class="link" href="InfAdoptedStateVector.html#inf-adopted-state-vector-to-string-diff" title="inf_adopted_state_vector_to_string_diff ()"><code class="function">inf_adopted_state_vector_to_string_diff()</code></a>. Deserializing this data
again (via <a class="link" href="InfAdoptedSession.html#inf-adopted-session-read-request-info" title="inf_adopted_session_read_request_info ()"><code class="function">inf_adopted_session_read_request_info()</code></a>) requires the same
<em class="parameter"><code>diff_vec</code></em>
then.</p>
<p>This function is most likely to be used by implementations of the
request_to_xml virtual function.</p>
<div class="refsect3">
<a name="id-1.4.2.12.8.6"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>session</p></td>
<td class="parameter_description"><p>A <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>request</p></td>
<td class="parameter_description"><p>The <a class="link" href="InfAdoptedRequest.html" title="InfAdoptedRequest"><span class="type">InfAdoptedRequest</span></a> whose info to write.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>diff_vec</p></td>
<td class="parameter_description"><p>A reference state vector, or <code class="literal">NULL</code>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>xml</p></td>
<td class="parameter_description"><p>The XML node to write the data into.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>operation</p></td>
<td class="parameter_description"><p>An XML node representing the operation of the request, or
<code class="literal">NULL</code>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="InfAdoptedSessionError"></a><h3>enum InfAdoptedSessionError</h3>
<p>Error codes for <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a>. These only occur when invalid requests
are received from the network.</p>
<div class="refsect3">
<a name="id-1.4.2.13.2.4"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="INF-ADOPTED-SESSION-ERROR-NO-SUCH-USER:CAPS"></a>INF_ADOPTED_SESSION_ERROR_NO_SUCH_USER</p></td>
<td class="enum_member_description">
<p>The "user" field in a request
message does not contain a valid user ID.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="INF-ADOPTED-SESSION-ERROR-MISSING-OPERATION:CAPS"></a>INF_ADOPTED_SESSION_ERROR_MISSING_OPERATION</p></td>
<td class="enum_member_description">
<p>A request message does not
contain an operation.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="INF-ADOPTED-SESSION-ERROR-INVALID-REQUEST:CAPS"></a>INF_ADOPTED_SESSION_ERROR_INVALID_REQUEST</p></td>
<td class="enum_member_description">
<p>A request in a synchronized
request log is invalid. Invalid means that it is not the request that
was issued after the previous request in the log, or that it is an Undo
or Redo request without a request to Undo or Redo, respectively.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="INF-ADOPTED-SESSION-ERROR-MISSING-STATE-VECTOR:CAPS"></a>INF_ADOPTED_SESSION_ERROR_MISSING_STATE_VECTOR</p></td>
<td class="enum_member_description">
<p>A synchronized user does
not contain that the state that user currently is in.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="INF-ADOPTED-SESSION-ERROR-FAILED:CAPS"></a>INF_ADOPTED_SESSION_ERROR_FAILED</p></td>
<td class="enum_member_description">
<p>No further specified error code.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="InfAdoptedSession-struct"></a><h3>struct InfAdoptedSession</h3>
<pre class="programlisting">struct InfAdoptedSession;</pre>
<p><a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> is an opaque data type. You should only access it via
the public API functions.</p>
</div>
<hr>
<div class="refsect2">
<a name="InfAdoptedSessionClass"></a><h3>struct InfAdoptedSessionClass</h3>
<pre class="programlisting">struct InfAdoptedSessionClass {
InfAdoptedRequest*(*xml_to_request)(InfAdoptedSession* session,
xmlNodePtr xml,
InfAdoptedStateVector* diff_vec,
gboolean for_sync,
GError** error);
void(*request_to_xml)(InfAdoptedSession* session,
xmlNodePtr xml,
InfAdoptedRequest* request,
InfAdoptedStateVector* diff_vec,
gboolean for_sync);
/* Signals */
gboolean(*check_request)(InfAdoptedSession* session,
InfAdoptedRequest* request,
InfAdoptedUser* user);
};
</pre>
<p>Virtual functions and default signal handlers for <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a>.</p>
<div class="refsect3">
<a name="id-1.4.2.13.4.5"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="InfAdoptedSessionClass.xml-to-request"></a>xml_to_request</code></em> ()</p></td>
<td class="struct_member_description"><p>Virtual function to deserialize an <a class="link" href="InfAdoptedRequest.html" title="InfAdoptedRequest"><span class="type">InfAdoptedRequest</span></a>
from XML. The implementation of this function can use
<a class="link" href="InfAdoptedSession.html#inf-adopted-session-read-request-info" title="inf_adopted_session_read_request_info ()"><code class="function">inf_adopted_session_read_request_info()</code></a> to read the common info.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="InfAdoptedSessionClass.request-to-xml"></a>request_to_xml</code></em> ()</p></td>
<td class="struct_member_description"><p>Virtual function to serialize an <a class="link" href="InfAdoptedRequest.html" title="InfAdoptedRequest"><span class="type">InfAdoptedRequest</span></a>
to XML. This function should add properties and children to the given XML
node. At might use <a class="link" href="InfAdoptedSession.html#inf-adopted-session-write-request-info" title="inf_adopted_session_write_request_info ()"><code class="function">inf_adopted_session_write_request_info()</code></a> to write the
common info.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="InfAdoptedSessionClass.check-request"></a>check_request</code></em> ()</p></td>
<td class="struct_member_description"><p>Default signal handler of the
InfAdoptedSession::check-request signal.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="InfAdoptedSession--algorithm"></a><h3>The <code class="literal">“algorithm”</code> property</h3>
<pre class="programlisting"> “algorithm” <a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="type">InfAdoptedAlgorithm</span></a> *</pre>
<p>The adOPTed algorithm used for translating incoming requests.</p>
<p>Flags: Read</p>
</div>
<hr>
<div class="refsect2">
<a name="InfAdoptedSession--io"></a><h3>The <code class="literal">“io”</code> property</h3>
<pre class="programlisting"> “io” <a class="link" href="InfIo.html" title="InfIo"><span class="type">InfIo</span></a> *</pre>
<p>The IO object used for timeouts.</p>
<p>Flags: Read / Write / Construct Only</p>
</div>
<hr>
<div class="refsect2">
<a name="InfAdoptedSession--max-total-log-size"></a><h3>The <code class="literal">“max-total-log-size”</code> property</h3>
<pre class="programlisting"> “max-total-log-size” <span class="type">guint</span></pre>
<p>The maximum number of requests to keep in all user's logs.</p>
<p>Flags: Read / Write / Construct Only</p>
<p>Default value: 2048</p>
</div>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="InfAdoptedSession-check-request"></a><h3>The <code class="literal">“check-request”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
user_function (<a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> *session,
<a class="link" href="InfAdoptedRequest.html" title="InfAdoptedRequest"><span class="type">InfAdoptedRequest</span></a> *request,
<a class="link" href="InfAdoptedUser.html" title="InfAdoptedUser"><span class="type">InfAdoptedUser</span></a> *user,
<span class="type">gpointer</span> user_data)</pre>
<p>This signal is emitted whenever the session received a request from a
non-local user. It is used to decide whether the request should be
processed or not. Note that generally not processing a request results is
loss of synchronization, since other hosts might process the request.
Only if the same condition can be applied on all sites a request should
be rejected. Another possibility is to reject a request at a central host
before it gets distributed to all other clients. If there is one signal
handler returning <code class="literal">TRUE</code> the request is rejected, i.e. only if all signal
handlers return <code class="literal">FALSE</code> it is accepted.</p>
<div class="refsect3">
<a name="id-1.4.2.15.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>session</p></td>
<td class="parameter_description"><p>The <a class="link" href="InfAdoptedSession.html" title="InfAdoptedSession"><span class="type">InfAdoptedSession</span></a> which is about to process a request.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>request</p></td>
<td class="parameter_description"><p>The request to be processed.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user</p></td>
<td class="parameter_description"><p>The user who issued the request.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run Last</p>
</div>
</div>
<div class="refsect1">
<a name="InfAdoptedSession.see-also"></a><h2>See Also</h2>
<p><a class="link" href="InfSession.html" title="InfSession"><span class="type">InfSession</span></a>, <a class="link" href="InfAdoptedAlgorithm.html" title="InfAdoptedAlgorithm"><span class="type">InfAdoptedAlgorithm</span></a></p>
</div>
</div>
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