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<section id="module-evennia.scripts.monitorhandler">
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<span id="evennia-scripts-monitorhandler"></span><h1>evennia.scripts.monitorhandler<a class="headerlink" href="#module-evennia.scripts.monitorhandler" title="Link to this heading">¶</a></h1>
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<p>Monitors - catch changes to model fields and Attributes.</p>
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<p>The MONITOR_HANDLER singleton from this module offers the following
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functionality:</p>
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<ul class="simple">
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<li><dl class="simple">
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<dt>Field-monitor - track a object’s specific database field and perform</dt><dd><p>an action whenever that field <em>changes</em> for whatever reason.</p>
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</dd>
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</dl>
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</li>
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<li><dl class="simple">
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<dt>Attribute-monitor tracks an object’s specific Attribute and perform</dt><dd><p>an action whenever that Attribute <em>changes</em> for whatever reason.</p>
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</dd>
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</dl>
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</li>
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</ul>
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<dl class="py class">
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<dt class="sig sig-object py" id="evennia.scripts.monitorhandler.MonitorHandler">
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<em class="property"><span class="k"><span class="pre">class</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">evennia.scripts.monitorhandler.</span></span><span class="sig-name descname"><span class="pre">MonitorHandler</span></span><a class="reference internal" href="../_modules/evennia/scripts/monitorhandler.html#MonitorHandler"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#evennia.scripts.monitorhandler.MonitorHandler" title="Link to this definition">¶</a></dt>
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<dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></p>
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<p>This is a resource singleton that allows for registering
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callbacks for when a field or Attribute is updated (saved).</p>
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<dl class="py method">
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<dt class="sig sig-object py" id="evennia.scripts.monitorhandler.MonitorHandler.__init__">
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<span class="sig-name descname"><span class="pre">__init__</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/evennia/scripts/monitorhandler.html#MonitorHandler.__init__"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#evennia.scripts.monitorhandler.MonitorHandler.__init__" title="Link to this definition">¶</a></dt>
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<dd><p>Initialize the handler.</p>
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</dd></dl>
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<dl class="py method">
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<dt class="sig sig-object py" id="evennia.scripts.monitorhandler.MonitorHandler.save">
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<span class="sig-name descname"><span class="pre">save</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/evennia/scripts/monitorhandler.html#MonitorHandler.save"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#evennia.scripts.monitorhandler.MonitorHandler.save" title="Link to this definition">¶</a></dt>
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<dd><p>Store our monitors to the database. This is called
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by the server process.</p>
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<p>Since dbserialize can’t handle defaultdicts, we convert to an
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intermediary save format ((obj,fieldname, idstring, callback, kwargs), …)</p>
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</dd></dl>
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<dl class="py method">
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<dt class="sig sig-object py" id="evennia.scripts.monitorhandler.MonitorHandler.restore">
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<span class="sig-name descname"><span class="pre">restore</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">server_reload</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">True</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/evennia/scripts/monitorhandler.html#MonitorHandler.restore"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#evennia.scripts.monitorhandler.MonitorHandler.restore" title="Link to this definition">¶</a></dt>
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<dd><p>Restore our monitors after a reload. This is called
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by the server process.</p>
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<dl class="field-list simple">
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<dt class="field-odd">Parameters<span class="colon">:</span></dt>
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<dd class="field-odd"><p><strong>server_reload</strong> (<em>bool</em><em>, </em><em>optional</em>) – If this is False, it means
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the server went through a cold reboot and all
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non-persistent tickers must be killed.</p>
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</dd>
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</dl>
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</dd></dl>
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<dl class="py method">
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<dt class="sig sig-object py" id="evennia.scripts.monitorhandler.MonitorHandler.at_update">
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<span class="sig-name descname"><span class="pre">at_update</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fieldname</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/evennia/scripts/monitorhandler.html#MonitorHandler.at_update"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#evennia.scripts.monitorhandler.MonitorHandler.at_update" title="Link to this definition">¶</a></dt>
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<dd><p>Called by the field/attribute as it saves.</p>
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</dd></dl>
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<dl class="py method">
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<dt class="sig sig-object py" id="evennia.scripts.monitorhandler.MonitorHandler.add">
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<span class="sig-name descname"><span class="pre">add</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fieldname</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">callback</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">idstring</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">''</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">persistent</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">False</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">category</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/evennia/scripts/monitorhandler.html#MonitorHandler.add"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#evennia.scripts.monitorhandler.MonitorHandler.add" title="Link to this definition">¶</a></dt>
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<dd><p>Add monitoring to a given field or Attribute. A field must
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be specified with the full db_* name or it will be assumed
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to be an Attribute (so <strong>db_key</strong>, not just <strong>key</strong>).</p>
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<dl class="field-list simple">
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<dt class="field-odd">Parameters<span class="colon">:</span></dt>
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||
<dd class="field-odd"><ul class="simple">
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||
<li><p><strong>obj</strong> (<em>Typeclassed Entity</em>) – The entity on which to monitor a
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||
field or Attribute.</p></li>
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||
<li><p><strong>fieldname</strong> (<em>str</em>) – Name of field (db_*) or Attribute to monitor.</p></li>
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||
<li><p><strong>callback</strong> (<em>callable</em>) – A callable on the form <a href="#id1"><span class="problematic" id="id2">**</span></a>callable(<a href="#id3"><span class="problematic" id="id4">**</span></a>kwargs),
|
||
where kwargs holds keys fieldname and obj.</p></li>
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<li><p><strong>idstring</strong> (<em>str</em><em>, </em><em>optional</em>) – An id to separate this monitor from other monitors
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||
of the same field and object.</p></li>
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<li><p><strong>persistent</strong> (<em>bool</em><em>, </em><em>optional</em>) – If False, the monitor will survive
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||
a server reload but not a cold restart. This is default.</p></li>
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||
<li><p><strong>category</strong> (<em>str</em><em>, </em><em>optional</em>) – This is only used if <strong>fieldname</strong> refers to
|
||
an Attribute (i.e. it does not start with <strong>db_</strong>). You must specify this
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||
if you want to target an Attribute with a category.</p></li>
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</ul>
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</dd>
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<dt class="field-even">Keyword Arguments<span class="colon">:</span></dt>
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<dd class="field-even"><ul class="simple">
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<li><p><strong>session</strong> (<a class="reference internal" href="evennia.server.session.html#evennia.server.session.Session" title="evennia.server.session.Session"><em>Session</em></a>) – If this keyword is given, the monitorhandler will
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||
correctly analyze it and remove the monitor if after a reload/reboot
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||
the session is no longer valid.</p></li>
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<li><p><strong>any</strong> (<em>any</em>) – Any other kwargs are passed on to the callback. Remember that
|
||
all kwargs must be possible to pickle!</p></li>
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||
</ul>
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</dd>
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</dl>
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</dd></dl>
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<dl class="py method">
|
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<dt class="sig sig-object py" id="evennia.scripts.monitorhandler.MonitorHandler.remove">
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<span class="sig-name descname"><span class="pre">remove</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fieldname</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">idstring</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">''</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">category</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/evennia/scripts/monitorhandler.html#MonitorHandler.remove"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#evennia.scripts.monitorhandler.MonitorHandler.remove" title="Link to this definition">¶</a></dt>
|
||
<dd><p>Remove a monitor.</p>
|
||
</dd></dl>
|
||
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||
<dl class="py method">
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||
<dt class="sig sig-object py" id="evennia.scripts.monitorhandler.MonitorHandler.clear">
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||
<span class="sig-name descname"><span class="pre">clear</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/evennia/scripts/monitorhandler.html#MonitorHandler.clear"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#evennia.scripts.monitorhandler.MonitorHandler.clear" title="Link to this definition">¶</a></dt>
|
||
<dd><p>Delete all monitors.</p>
|
||
</dd></dl>
|
||
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<dl class="py method">
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<dt class="sig sig-object py" id="evennia.scripts.monitorhandler.MonitorHandler.all">
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<span class="sig-name descname"><span class="pre">all</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">obj</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/evennia/scripts/monitorhandler.html#MonitorHandler.all"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#evennia.scripts.monitorhandler.MonitorHandler.all" title="Link to this definition">¶</a></dt>
|
||
<dd><p>List all monitors or all monitors of a given object.</p>
|
||
<dl class="field-list simple">
|
||
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
|
||
<dd class="field-odd"><p><strong>obj</strong> (<em>Object</em>) – The object on which to list all monitors.</p>
|
||
</dd>
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||
<dt class="field-even">Returns<span class="colon">:</span></dt>
|
||
<dd class="field-even"><p><em>monitors (list)</em> – The handled monitors.</p>
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||
</dd>
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||
</dl>
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</dd></dl>
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</dd></dl>
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<h3><a href="../index.html">Table of Contents</a></h3>
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<ul>
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<li><a class="reference internal" href="#">evennia.scripts.monitorhandler</a><ul>
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<li><a class="reference internal" href="#evennia.scripts.monitorhandler.MonitorHandler"><code class="docutils literal notranslate"><span class="pre">MonitorHandler</span></code></a><ul>
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<li><a class="reference internal" href="#evennia.scripts.monitorhandler.MonitorHandler.__init__"><code class="docutils literal notranslate"><span class="pre">MonitorHandler.__init__()</span></code></a></li>
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<li><a class="reference internal" href="#evennia.scripts.monitorhandler.MonitorHandler.save"><code class="docutils literal notranslate"><span class="pre">MonitorHandler.save()</span></code></a></li>
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<li><a class="reference internal" href="#evennia.scripts.monitorhandler.MonitorHandler.restore"><code class="docutils literal notranslate"><span class="pre">MonitorHandler.restore()</span></code></a></li>
|
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<li><a class="reference internal" href="#evennia.scripts.monitorhandler.MonitorHandler.at_update"><code class="docutils literal notranslate"><span class="pre">MonitorHandler.at_update()</span></code></a></li>
|
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<li><a class="reference internal" href="#evennia.scripts.monitorhandler.MonitorHandler.add"><code class="docutils literal notranslate"><span class="pre">MonitorHandler.add()</span></code></a></li>
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<li><a class="reference internal" href="#evennia.scripts.monitorhandler.MonitorHandler.remove"><code class="docutils literal notranslate"><span class="pre">MonitorHandler.remove()</span></code></a></li>
|
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<li><a class="reference internal" href="#evennia.scripts.monitorhandler.MonitorHandler.clear"><code class="docutils literal notranslate"><span class="pre">MonitorHandler.clear()</span></code></a></li>
|
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<li><a class="reference internal" href="#evennia.scripts.monitorhandler.MonitorHandler.all"><code class="docutils literal notranslate"><span class="pre">MonitorHandler.all()</span></code></a></li>
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