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<span class="target" id="module-eventmq.router"></span><div class="section" id="router-router">
<h1><code class="xref py py-mod docutils literal"><span class="pre">router</span></code> – Router<a class="headerlink" href="#router-router" title="Permalink to this headline">¶</a></h1>
<p>Routes messages to workers (that are in named queues).</p>
<dl class="class">
<dt id="eventmq.router.Router">
<em class="property">class </em><code class="descclassname">eventmq.router.</code><code class="descname">Router</code><span class="sig-paren">(</span><em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router" title="Permalink to this definition">¶</a></dt>
<dd><p>A simple router of messages</p>
<dl class="method">
<dt id="eventmq.router.Router.add_worker">
<code class="descname">add_worker</code><span class="sig-paren">(</span><em>id</em>, <em>queues=None</em><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.add_worker" title="Permalink to this definition">¶</a></dt>
<dd><p>Adds a worker to worker queues</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><strong>worker_id</strong> – unique id of the worker to add</li>
<li><strong>queues</strong> – queue or queues this worker should be a member of</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="eventmq.router.Router.clean_up_dead_workers">
<code class="descname">clean_up_dead_workers</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.clean_up_dead_workers" title="Permalink to this definition">¶</a></dt>
<dd><p>Loops through the worker queues and removes any workers who haven’t
responded in HEARTBEAT_TIMEOUT</p>
</dd></dl>
<dl class="method">
<dt id="eventmq.router.Router.on_heartbeat">
<code class="descname">on_heartbeat</code><span class="sig-paren">(</span><em>sender</em>, <em>msgid</em>, <em>msg</em><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.on_heartbeat" title="Permalink to this definition">¶</a></dt>
<dd><p>a placeholder for a noop command. The actual ‘logic’ for HEARTBEAT is
in <code class="xref py py-meth docutils literal"><span class="pre">self.process_worker_message()</span></code> because any message from a worker
counts as a HEARTBEAT</p>
</dd></dl>
<dl class="method">
<dt id="eventmq.router.Router.on_inform">
<code class="descname">on_inform</code><span class="sig-paren">(</span><em>sender</em>, <em>msgid</em>, <em>msg</em><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.on_inform" title="Permalink to this definition">¶</a></dt>
<dd><p>Handles an INFORM message. Usually when new worker coming online</p>
</dd></dl>
<dl class="method">
<dt id="eventmq.router.Router.on_receive_request">
<code class="descname">on_receive_request</code><span class="sig-paren">(</span><em>msg</em><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.on_receive_request" title="Permalink to this definition">¶</a></dt>
<dd><p>This function is called when a message comes in from the client socket.
It then calls <cite>on_command</cite>. If <cite>on_command</cite> isn’t found, then a
warning is created.</p>
</dd></dl>
<dl class="method">
<dt id="eventmq.router.Router.process_worker_message">
<code class="descname">process_worker_message</code><span class="sig-paren">(</span><em>msg</em><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.process_worker_message" title="Permalink to this definition">¶</a></dt>
<dd><p>This method is called when a message comes in from the worker socket.
It then calls <cite>on_command</cite>. If <cite>on_command</cite> isn’t found, then a warning
is created.</p>
<dl class="docutils">
<dt>def on_inform(msg):</dt>
<dd>pass</dd>
</dl>
</dd></dl>
<dl class="method">
<dt id="eventmq.router.Router.send_ack">
<code class="descname">send_ack</code><span class="sig-paren">(</span><em>socket</em>, <em>recipient</em>, <em>msgid</em><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.send_ack" title="Permalink to this definition">¶</a></dt>
<dd><p>Sends an ACK response</p>
</dd></dl>
<dl class="method">
<dt id="eventmq.router.Router.send_heartbeat">
<code class="descname">send_heartbeat</code><span class="sig-paren">(</span><em>socket</em>, <em>recipient</em><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.send_heartbeat" title="Permalink to this definition">¶</a></dt>
<dd><p>Custom send heartbeat method to take into account the recipient that is
needed when building messages</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><strong>socket</strong> (<a class="reference external" href="https://docs.python.org/library/socket.html#module-socket" title="(in Python v2.7)"><em>socket</em></a>) – the socket to send the heartbeat with</li>
<li><strong>recipient</strong> (<a class="reference external" href="https://docs.python.org/library/functions.html#str" title="(in Python v2.7)"><em>str</em></a>) – Worker I</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="eventmq.router.Router.send_workers_heartbeats">
<code class="descname">send_workers_heartbeats</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.send_workers_heartbeats" title="Permalink to this definition">¶</a></dt>
<dd><p>Send heartbeats to the registered workers.</p>
</dd></dl>
<dl class="method">
<dt id="eventmq.router.Router.start">
<code class="descname">start</code><span class="sig-paren">(</span><em>frontend_addr='tcp://127.0.0.1:47290'</em>, <em>backend_addr='tcp://127.0.0.1:47291'</em><span class="sig-paren">)</span><a class="headerlink" href="#eventmq.router.Router.start" title="Permalink to this definition">¶</a></dt>
<dd><p>Begin listening for connections on the provided connection strings</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><strong>frontend_addr</strong> (<a class="reference external" href="https://docs.python.org/library/functions.html#str" title="(in Python v2.7)"><em>str</em></a>) – connection string to listen for requests</li>
<li><strong>backend_addr</strong> (<a class="reference external" href="https://docs.python.org/library/functions.html#str" title="(in Python v2.7)"><em>str</em></a>) – connection string to listen for workers</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
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