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  <div class="section" id="module-celery.timer">
<h1>Timers - celery.timer<a class="headerlink" href="#module-celery.timer" title="Permalink to this headline">¶</a></h1>
<p>Managing time and events</p>
<dl class="class">
<dt id="celery.timer.EventTimer">
<em class="property">
class </em><tt class="descclassname">celery.timer.</tt><tt class="descname">EventTimer</tt><big>(</big><em>event</em>, <em>interval=None</em><big>)</big><a class="headerlink" href="#celery.timer.EventTimer" title="Permalink to this definition">¶</a></dt>
<dd><p>Do something at an interval.</p>
<dl class="attribute">
<dt id="celery.timer.EventTimer.interval">
<tt class="descname">interval</tt><a class="headerlink" href="#celery.timer.EventTimer.interval" title="Permalink to this definition">¶</a></dt>
<dd>How often we call the event (in seconds).</dd></dl>

<dl class="attribute">
<dt id="celery.timer.EventTimer.event">
<tt class="descname">event</tt><a class="headerlink" href="#celery.timer.EventTimer.event" title="Permalink to this definition">¶</a></dt>
<dd>The event callable to run every <tt class="docutils literal"><span class="pre">interval</span></tt> seconds.</dd></dl>

<dl class="attribute">
<dt id="celery.timer.EventTimer.last_triggered">
<tt class="descname">last_triggered</tt><a class="headerlink" href="#celery.timer.EventTimer.last_triggered" title="Permalink to this definition">¶</a></dt>
<dd>The last time, in unix timestamp format, the event was executed.</dd></dl>

<dl class="method">
<dt id="celery.timer.EventTimer.tick">
<tt class="descname">tick</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.timer.EventTimer.tick" title="Permalink to this definition">¶</a></dt>
<dd><p>Run a event timer clock tick.</p>
<p>When the interval has run, the event will be triggered.
If interval is not set, the event will never be triggered.</p>
</dd></dl>

</dd></dl>

<dl class="exception">
<dt id="celery.timer.TimeoutError">
<em class="property">
exception </em><tt class="descclassname">celery.timer.</tt><tt class="descname">TimeoutError</tt><a class="headerlink" href="#celery.timer.TimeoutError" title="Permalink to this definition">¶</a></dt>
<dd>The event has timed out.</dd></dl>

<dl class="class">
<dt id="celery.timer.TimeoutTimer">
<em class="property">
class </em><tt class="descclassname">celery.timer.</tt><tt class="descname">TimeoutTimer</tt><big>(</big><em>timeout</em>, <em>timeout_msg='The operation timed out'</em><big>)</big><a class="headerlink" href="#celery.timer.TimeoutTimer" title="Permalink to this definition">¶</a></dt>
<dd><p>A timer that raises <a title="celery.timer.TimeoutError" class="reference internal" href="#celery.timer.TimeoutError"><tt class="xref docutils literal"><span class="pre">TimeoutError</span></tt></a> exception when the
time has run out.</p>
<dl class="attribute">
<dt id="celery.timer.TimeoutTimer.timeout">
<tt class="descname">timeout</tt><a class="headerlink" href="#celery.timer.TimeoutTimer.timeout" title="Permalink to this definition">¶</a></dt>
<dd>The timeout in seconds.</dd></dl>

<dl class="attribute">
<dt id="celery.timer.TimeoutTimer.time_start">
<tt class="descname">time_start</tt><a class="headerlink" href="#celery.timer.TimeoutTimer.time_start" title="Permalink to this definition">¶</a></dt>
<dd>The time when the timeout timer instance was constructed.</dd></dl>

<dl class="method">
<dt id="celery.timer.TimeoutTimer.tick">
<tt class="descname">tick</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.timer.TimeoutTimer.tick" title="Permalink to this definition">¶</a></dt>
<dd><p>Run a timeout timer clock tick.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name" colspan="2">Raises <a title="celery.timer.TimeoutError" class="reference internal" href="#celery.timer.TimeoutError">TimeoutError</a>:</th></tr>
<tr><td>&nbsp;</td><td class="field-body">when <a title="celery.timer.TimeoutTimer.timeout" class="reference internal" href="#celery.timer.TimeoutTimer.timeout"><tt class="xref docutils literal"><span class="pre">timeout</span></tt></a> seconds has passed.
If <a title="celery.timer.TimeoutTimer.timeout" class="reference internal" href="#celery.timer.TimeoutTimer.timeout"><tt class="xref docutils literal"><span class="pre">timeout</span></tt></a> is not set, it will never time out.</td>
</tr>
</tbody>
</table>
</dd></dl>

</dd></dl>

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