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<span class="target" id="module-kombu.transport.virtual.exchange"></span><div class="section" id="kombu-transport-virtual-exchange">
<h1>kombu.transport.virtual.exchange<a class="headerlink" href="#kombu-transport-virtual-exchange" title="Permalink to this headline">¶</a></h1>
<p>Implementations of the standard exchanges defined
by the AMQ protocol (excluding the <cite>headers</cite> exchange).</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">copyright:</th><td class="field-body"><ol class="first loweralpha simple" start="3">
<li>2009 - 2012 by Ask Solem.</li>
</ol>
</td>
</tr>
<tr class="field-even field"><th class="field-name">license:</th><td class="field-body"><p class="first last">BSD, see LICENSE for more details.</p>
</td>
</tr>
</tbody>
</table>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><a class="reference internal" href="#direct" id="id1">Direct</a></li>
<li><a class="reference internal" href="#topic" id="id2">Topic</a></li>
<li><a class="reference internal" href="#fanout" id="id3">Fanout</a></li>
<li><a class="reference internal" href="#interface" id="id4">Interface</a></li>
</ul>
</div>
<div class="section" id="direct">
<h2><a class="toc-backref" href="#id1">Direct</a><a class="headerlink" href="#direct" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="kombu.transport.virtual.exchange.DirectExchange">
<em class="property">class </em><tt class="descclassname">kombu.transport.virtual.exchange.</tt><tt class="descname">DirectExchange</tt><big>(</big><em>channel</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.DirectExchange" title="Permalink to this definition">¶</a></dt>
<dd><p>The <cite>direct</cite> exchange routes based on exact routing keys.</p>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.DirectExchange.deliver">
<tt class="descname">deliver</tt><big>(</big><em>message</em>, <em>exchange</em>, <em>routing_key</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.DirectExchange.deliver" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.DirectExchange.lookup">
<tt class="descname">lookup</tt><big>(</big><em>table</em>, <em>exchange</em>, <em>routing_key</em>, <em>default</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.DirectExchange.lookup" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="attribute">
<dt id="kombu.transport.virtual.exchange.DirectExchange.type">
<tt class="descname">type</tt><em class="property"> = 'direct'</em><a class="headerlink" href="#kombu.transport.virtual.exchange.DirectExchange.type" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
</div>
<div class="section" id="topic">
<h2><a class="toc-backref" href="#id2">Topic</a><a class="headerlink" href="#topic" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="kombu.transport.virtual.exchange.TopicExchange">
<em class="property">class </em><tt class="descclassname">kombu.transport.virtual.exchange.</tt><tt class="descname">TopicExchange</tt><big>(</big><em>channel</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.TopicExchange" title="Permalink to this definition">¶</a></dt>
<dd><p>The <cite>topic</cite> exchange routes messages based on words separated by
dots, using wildcard characters <tt class="docutils literal"><span class="pre">*</span></tt> (any single word), and <tt class="docutils literal"><span class="pre">#</span></tt>
(one or more words).</p>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.TopicExchange.deliver">
<tt class="descname">deliver</tt><big>(</big><em>message</em>, <em>exchange</em>, <em>routing_key</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.TopicExchange.deliver" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.TopicExchange.key_to_pattern">
<tt class="descname">key_to_pattern</tt><big>(</big><em>rkey</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.TopicExchange.key_to_pattern" title="Permalink to this definition">¶</a></dt>
<dd><p>Get the corresponding regex for any routing key.</p>
</dd></dl>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.TopicExchange.lookup">
<tt class="descname">lookup</tt><big>(</big><em>table</em>, <em>exchange</em>, <em>routing_key</em>, <em>default</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.TopicExchange.lookup" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.TopicExchange.prepare_bind">
<tt class="descname">prepare_bind</tt><big>(</big><em>queue</em>, <em>exchange</em>, <em>routing_key</em>, <em>arguments</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.TopicExchange.prepare_bind" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="attribute">
<dt id="kombu.transport.virtual.exchange.TopicExchange.type">
<tt class="descname">type</tt><em class="property"> = 'topic'</em><a class="headerlink" href="#kombu.transport.virtual.exchange.TopicExchange.type" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="attribute">
<dt id="kombu.transport.virtual.exchange.TopicExchange.wildcards">
<tt class="descname">wildcards</tt><em class="property"> = {'#': '.*?', '*': '.*?[^\\.]'}</em><a class="headerlink" href="#kombu.transport.virtual.exchange.TopicExchange.wildcards" title="Permalink to this definition">¶</a></dt>
<dd><p>map of wildcard to regex conversions</p>
</dd></dl>
</dd></dl>
</div>
<div class="section" id="fanout">
<h2><a class="toc-backref" href="#id3">Fanout</a><a class="headerlink" href="#fanout" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="kombu.transport.virtual.exchange.FanoutExchange">
<em class="property">class </em><tt class="descclassname">kombu.transport.virtual.exchange.</tt><tt class="descname">FanoutExchange</tt><big>(</big><em>channel</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.FanoutExchange" title="Permalink to this definition">¶</a></dt>
<dd><p>The <cite>fanout</cite> exchange implements broadcast messaging by delivering
copies of all messages to all queues bound the the exchange.</p>
<p>To support fanout the virtual channel needs to store the table
as shared state. This requires that the <cite>Channel.supports_fanout</cite>
attribute is set to true, and the <cite>Channel._queue_bind</cite> and
<cite>Channel.get_table</cite> methods are implemented. See the redis backend
for an example implementation of these methods.</p>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.FanoutExchange.deliver">
<tt class="descname">deliver</tt><big>(</big><em>message</em>, <em>exchange</em>, <em>routing_key</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.FanoutExchange.deliver" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.FanoutExchange.lookup">
<tt class="descname">lookup</tt><big>(</big><em>table</em>, <em>exchange</em>, <em>routing_key</em>, <em>default</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.FanoutExchange.lookup" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="attribute">
<dt id="kombu.transport.virtual.exchange.FanoutExchange.type">
<tt class="descname">type</tt><em class="property"> = 'fanout'</em><a class="headerlink" href="#kombu.transport.virtual.exchange.FanoutExchange.type" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
</div>
<div class="section" id="interface">
<h2><a class="toc-backref" href="#id4">Interface</a><a class="headerlink" href="#interface" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="kombu.transport.virtual.exchange.ExchangeType">
<em class="property">class </em><tt class="descclassname">kombu.transport.virtual.exchange.</tt><tt class="descname">ExchangeType</tt><big>(</big><em>channel</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.ExchangeType" title="Permalink to this definition">¶</a></dt>
<dd><p>Implements the specifics for an exchange type.</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"><strong>channel</strong> – AMQ Channel</td>
</tr>
</tbody>
</table>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.ExchangeType.equivalent">
<tt class="descname">equivalent</tt><big>(</big><em>prev</em>, <em>exchange</em>, <em>type</em>, <em>durable</em>, <em>auto_delete</em>, <em>arguments</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.ExchangeType.equivalent" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns true if <cite>prev</cite> and <cite>exchange</cite> is equivalent.</p>
</dd></dl>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.ExchangeType.lookup">
<tt class="descname">lookup</tt><big>(</big><em>table</em>, <em>exchange</em>, <em>routing_key</em>, <em>default</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.ExchangeType.lookup" title="Permalink to this definition">¶</a></dt>
<dd><p>Lookup all queues matching <cite>routing_key</cite> in <cite>exchange</cite>.</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">Returns:</th><td class="field-body"><cite>default</cite> if no queues matched.</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="kombu.transport.virtual.exchange.ExchangeType.prepare_bind">
<tt class="descname">prepare_bind</tt><big>(</big><em>queue</em>, <em>exchange</em>, <em>routing_key</em>, <em>arguments</em><big>)</big><a class="headerlink" href="#kombu.transport.virtual.exchange.ExchangeType.prepare_bind" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns tuple of <cite>(routing_key, regex, queue)</cite> to be stored
for bindings to this exchange.</p>
</dd></dl>
<dl class="attribute">
<dt id="kombu.transport.virtual.exchange.ExchangeType.type">
<tt class="descname">type</tt><em class="property"> = None</em><a class="headerlink" href="#kombu.transport.virtual.exchange.ExchangeType.type" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
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<h3><a href="../index.html">Table Of Contents</a></h3>
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<li><a class="reference internal" href="#">kombu.transport.virtual.exchange</a><ul>
<li><a class="reference internal" href="#direct">Direct</a></li>
<li><a class="reference internal" href="#topic">Topic</a></li>
<li><a class="reference internal" href="#fanout">Fanout</a></li>
<li><a class="reference internal" href="#interface">Interface</a></li>
</ul>
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