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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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  <title>Soprano.Server.ServerCore</title>
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<h1>ServerCore Class Reference</h1>
<code>from PyKDE4.soprano import *</code>
<p>
Inherits: QObject,<a href="../soprano/Soprano.Error.ErrorCache.html">Soprano.Error.ErrorCache</a><br />

Namespace: <a href="../soprano/Soprano.Server.html">Soprano.Server</a><br />
<h2>Detailed Description</h2>

<p>\class ServerCore servercore.h Soprano/Server/ServerCore
</p>
<p>
Central %Soprano server class.
</p>
<p>
The %ServerCore provides a %Soprano server which maintains a set
of named Model instances that can be accessed by clients over
a tcp connection through Server.BackendPlugin.
</p>
<p>
Creating a server is very simple: Either derive from ServerCore or
create an instance and then call start() to make the server listen
for incoming connections.
</p>
<p>
<pre class="fragment">
 Soprano.Server.ServerCore core;
 core.start();
</pre>
</p>
<p>
Optionally ServerCore can be configured using normal BackendSetting
settings through setBackendSettings().
</p>
<p>
Be aware the ServerCode supports multiple ways of communication.
start() opens a TCP socket to accept new connections, registerAsDBusObject()
registers a DBus interface on the DBus session bus. Both ways of
communication can be used simultaneously.
</p>
<p>
ServerCore will spawn a new thread for each incoming TCP or local socket
connection. In addition the D-Bus interface is running in its own thread.
The maximum number of threads that are spawned can be set via setMaximumConnectionCount().
By default there is no restriction on the maximum thread count to keep
backwards compatibility.
</p>
<p>

<dl class="author" compact><dt><b>Author:</b></dt><dd> Sebastian Trueg &lt;trueg@kde.org&gt; </dd></dl>
</p>
<table border="0" cellpadding="0" cellspacing="0"><tr><td colspan="2"><br><h2>Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#varDEFAULT_PORT">DEFAULT_PORT</a></td></tr><tr><td colspan="2"><br><h2>Methods</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ServerCore">__init__</a> (self, QObject parent=0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QStringList&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#allModels">allModels</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../soprano/Soprano.Backend.html">Soprano.Backend</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#backend">backend</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">[<a href="../soprano/Soprano.BackendSetting.html">Soprano.BackendSetting</a>]&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#backendSettings">backendSettings</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../soprano/Soprano.Model.html">Soprano.Model</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#createModel">createModel</a> (self, [<a href="../soprano/Soprano.BackendSetting.html">Soprano.BackendSetting</a>] settings)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#listen">listen</a> (self, int port=Soprano.Server.ServerCore.DEFAULT_PORT)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#maximumConnectionCount">maximumConnectionCount</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../soprano/Soprano.Model.html">Soprano.Model</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#model">model</a> (self, QString name)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#registerAsDBusObject">registerAsDBusObject</a> (self, QString objectPath=QString())</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#removeModel">removeModel</a> (self, QString name)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#serverPort">serverPort</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#setBackend">setBackend</a> (self, <a href="../soprano/Soprano.Backend.html">Soprano.Backend</a> backend)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#setBackendSettings">setBackendSettings</a> (self, [<a href="../soprano/Soprano.BackendSetting.html">Soprano.BackendSetting</a>] settings)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#setMaximumConnectionCount">setMaximumConnectionCount</a> (self, int max)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="#start">start</a> (self, QString socketPath=QString())</td></tr>
</table>
<hr><h2>Method Documentation</h2><a class="anchor" name="ServerCore"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject&nbsp;</td>
<td class="paramname"><em>parent=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"></div></div><a class="anchor" name="allModels"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QStringList allModels</td>
<td>(</td>
<td class="paramtype">&nbsp;</td>
<td class="paramname"><em>self</em>&nbsp;)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Retrieve all models that have been loaded.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> A list of Model names.
</dd></dl>
</p></div></div><a class="anchor" name="backend"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../soprano/Soprano.Backend.html">Soprano.Backend</a> backend</td>
<td>(</td>
<td class="paramtype">&nbsp;</td>
<td class="paramname"><em>self</em>&nbsp;)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>The Backend used by the Server to create Model instances.
</p></div></div><a class="anchor" name="backendSettings"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">[<a href="../soprano/Soprano.BackendSetting.html">Soprano.BackendSetting</a>] backendSettings</td>
<td>(</td>
<td class="paramtype">&nbsp;</td>
<td class="paramname"><em>self</em>&nbsp;)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Retrieve the backend settings configured via setBackendSettings().
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> A list of BackendSetting objects.
</dd></dl>
</p></div></div><a class="anchor" name="createModel"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../soprano/Soprano.Model.html">Soprano.Model</a> createModel</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">[<a href="../soprano/Soprano.BackendSetting.html">Soprano.BackendSetting</a>]&nbsp;</td>
<td class="paramname"><em>settings</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Create a new Model. The default implementation uses the configured Backend
with the configured settings to create a new Model. This method can be
reimplemented to create specialized Model, for example in combination with
some FilterModel.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>settings</em>&nbsp;</td><td> The settings to use (a reimplementation may choose to ignore the
settings.)
</td></tr>
</table></dl>
<p> <dl class="return" compact><dt><b>Returns:</b></dt><dd> A newly create Model.
</dd></dl>
</p></div></div><a class="anchor" name="listen"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool listen</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">int&nbsp;</td>
<td class="paramname"><em>port=Soprano.Server.ServerCore.DEFAULT_PORT</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Start the Server. Calling this method will make the Server
listen on the specified port for incoming client connections.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>port</em>&nbsp;</td><td> The port to listen on for client connections.
</td></tr>
</table></dl>
<p> Use Client.TcpClient to connect.
</p>
<p>
<dl class="warning" compact><dt><b>Warning:</b></dt><dd> Via the TCP connection signals are not supported. Thus, the models created
by it will not emit signals such as Model.statementAdded. Also no permission handling or
any kind of security is implemented at the moment. Thus, if a server is running and is
listening on a port, it is open to connections from any client on any computer in the
network.
</dd></dl> </p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> <b>true</b> if the server was successfully started, <b>false</b> otherwise.
</dd></dl>
</p></div></div><a class="anchor" name="maximumConnectionCount"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">int maximumConnectionCount</td>
<td>(</td>
<td class="paramtype">&nbsp;</td>
<td class="paramname"><em>self</em>&nbsp;)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>The maximum number of incoming connections that are served.
</p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> The maxium number of connections the server will handle
or 0 if there is no restriction.
</dd></dl> </p>
<p>
\sa setMaximumConnectionCount.
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 2.4
</dd></dl>
</p></div></div><a class="anchor" name="model"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../soprano/Soprano.Model.html">Soprano.Model</a> model</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>name</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Get or create Model with the specific name.
The default implementation will use createModel() to create a new Model
if none with the specified name exists and protect it against deadlocks
with a Util.AsyncModel.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>name</em>&nbsp;</td><td> The name of the requested Model.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="registerAsDBusObject"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> registerAsDBusObject</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>objectPath=QString()</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Register the ServerCore as a DBus object. The process needs to be registered
as a DBus service before (QDBusConnection.registerService()).
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>objectPath</em>&nbsp;</td><td> The DBus object path to register the server as. If empty
the default path will be used (/org/soprano/Server).
</td></tr>
</table></dl>
<p> Use Client.DBusClient to connect.
</p>
<p>
In case Soprano is compiled without D-Bus support this method does nothing.
</p>
<p>
D-Bus clients will be served in a separate thread.
</p></div></div><a class="anchor" name="removeModel"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> removeModel</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>name</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Remove a model and delete all data in it.
Use with care.
</p>
<p>
Be aware that the Model instance will also be deleted.
</p>
<p>
Should be reimplemented if model() is reimplemented.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>name</em>&nbsp;</td><td> The name of the requested Model.
</td></tr>
</table></dl>
<p> <dl class="warning" compact><dt><b>Warning:</b></dt><dd> This is not the same as deleting the Model instance.
It will also delete all the data on the harddisk.
</dd></dl>
</p></div></div><a class="anchor" name="serverPort"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">int serverPort</td>
<td>(</td>
<td class="paramtype">&nbsp;</td>
<td class="paramname"><em>self</em>&nbsp;)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p><dl class="return" compact><dt><b>Returns:</b></dt><dd> The port this server is listening on or 0 if listen has not
been called successfully.
</dd></dl> </p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 2.1
</dd></dl>
</p></div></div><a class="anchor" name="setBackend"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setBackend</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../soprano/Soprano.Backend.html">Soprano.Backend</a>&nbsp;</td>
<td class="paramname"><em>backend</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Set the Backend used in the Server to create Models.
</p></div></div><a class="anchor" name="setBackendSettings"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setBackendSettings</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">[<a href="../soprano/Soprano.BackendSetting.html">Soprano.BackendSetting</a>]&nbsp;</td>
<td class="paramname"><em>settings</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Set the settings that are to be used by createModel() to create new Model
instances. Be aware that Soprano.BackendOptionStorageDir will be changed
to include a subdir which is the Model's name.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>settings</em>&nbsp;</td><td> The settings to use for new Models.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="setMaximumConnectionCount"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setMaximumConnectionCount</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">int&nbsp;</td>
<td class="paramname"><em>max</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Set the maximum number of TCP and local socket connections. If the max is reached
new incoming connections are refused.
</p>
<p>
This makes sense to restrict the number of threads the server spawns.
</p>
<p>
A typical usage would be to server a max number of clients via a local
socket connection and let the rest share the one D-Bus interface.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>max</em>&nbsp;</td><td> The maximum number of connections. Using a value of 0 means no restriction.
</td></tr>
</table></dl>
<p> <dl class="since" compact><dt><b>Since:</b></dt><dd> 2.4
</dd></dl>
</p></div></div><a class="anchor" name="start"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool start</td>
<td>(</td>
<td class="paramtype">&nbsp;<em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString&nbsp;</td>
<td class="paramname"><em>socketPath=QString()</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Start the core on a local socket.
On Windows this is a named pipe and on Unix this this is a local domain socket.
</p>
<p>
Use Client.LocalSocketClient to connect.
</p>
<p>
<dl class="warning" compact><dt><b>Warning:</b></dt><dd> Via the local socket connection signals are not supported.
</dd></dl> </p>
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd> <b>true</b> if the local socket could be successfully
opened. <b>false</b> on error. See ErrorCache.lastError() for details.
</dd></dl>
</p></div></div><hr><h2>Attribute Documentation</h2><a class="anchor" name="varDEFAULT_PORT"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr><td class="memname">int DEFAULT_PORT</td>
</tr>
</table>
</div>
<div class="memdoc"></div></div><p>
</div>
</div>
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