yangck
/
celery


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210
							<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    
    <title>Task Pool - celery.pool &mdash; Celery v0.3.20 (unstable) documentation</title>
    <link rel="stylesheet" href="../static/nature.css" type="text/css" />
    <link rel="stylesheet" href="../static/pygments.css" type="text/css" />
    <script type="text/javascript">
      var DOCUMENTATION_OPTIONS = {
        URL_ROOT:    '../',
        VERSION:     '0.3.20 (unstable)',
        COLLAPSE_MODINDEX: false,
        FILE_SUFFIX: '.html',
        HAS_SOURCE:  true
      };
    </script>
    <script type="text/javascript" src="../static/jquery.js"></script>
    <script type="text/javascript" src="../static/doctools.js"></script>
    <link rel="top" title="Celery v0.3.20 (unstable) documentation" href="../index.html" />
    <link rel="up" title="Module API Reference" href="index.html" />
    <link rel="next" title="Process Supervisor - celery.supervisor" href="celery.supervisor.html" />
    <link rel="prev" title="Worker Controller Threads - celery.worker.controllers" href="celery.worker.controllers.html" /> 
  </head>
  <body>
    <div class="related">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="../genindex.html" title="General Index"
             accesskey="I">index</a></li>
        <li class="right" >
          <a href="../modindex.html" title="Global Module Index"
             accesskey="M">modules</a> |</li>
        <li class="right" >
          <a href="celery.supervisor.html" title="Process Supervisor - celery.supervisor"
             accesskey="N">next</a> |</li>
        <li class="right" >
          <a href="celery.worker.controllers.html" title="Worker Controller Threads - celery.worker.controllers"
             accesskey="P">previous</a> |</li>
        <li><a href="../index.html">Celery v0.3.20 (unstable) documentation</a> &raquo;</li>
          <li><a href="index.html" accesskey="U">Module API Reference</a> &raquo;</li> 
      </ul>
    </div>  

    <div class="document">
      <div class="documentwrapper">
        <div class="bodywrapper">
          <div class="body">
            
  <div class="section" id="module-celery.pool">
<h1>Task Pool - celery.pool<a class="headerlink" href="#module-celery.pool" title="Permalink to this headline">¶</a></h1>
<p>Process Pools.</p>
<dl class="class">
<dt id="celery.pool.TaskPool">
<em class="property">
class </em><tt class="descclassname">celery.pool.</tt><tt class="descname">TaskPool</tt><big>(</big><em>limit</em>, <em>logger=None</em><big>)</big><a class="headerlink" href="#celery.pool.TaskPool" title="Permalink to this definition">¶</a></dt>
<dd><p>Pool of running child processes, which starts waiting for the
processes to finish when the queue limit has been reached.</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">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>limit</em> &#8211; see <a title="celery.pool.TaskPool.limit" class="reference internal" href="#celery.pool.TaskPool.limit"><tt class="xref docutils literal"><span class="pre">limit</span></tt></a> attribute.</li>
<li><em>logger</em> &#8211; see <a title="celery.pool.TaskPool.logger" class="reference internal" href="#celery.pool.TaskPool.logger"><tt class="xref docutils literal"><span class="pre">logger</span></tt></a> attribute.</li>
</ul>
</td>
</tr>
</tbody>
</table>
<dl class="attribute">
<dt id="celery.pool.TaskPool.limit">
<tt class="descname">limit</tt><a class="headerlink" href="#celery.pool.TaskPool.limit" title="Permalink to this definition">¶</a></dt>
<dd>The number of processes that can run simultaneously until
we start collecting results.</dd></dl>

<dl class="attribute">
<dt id="celery.pool.TaskPool.logger">
<tt class="descname">logger</tt><a class="headerlink" href="#celery.pool.TaskPool.logger" title="Permalink to this definition">¶</a></dt>
<dd>The logger used for debugging.</dd></dl>

<dl class="method">
<dt id="celery.pool.TaskPool.apply_async">
<tt class="descname">apply_async</tt><big>(</big><em>target</em>, <em>args=None</em>, <em>kwargs=None</em>, <em>callbacks=None</em>, <em>errbacks=None</em>, <em>on_acknowledge=None</em>, <em>meta=None</em><big>)</big><a class="headerlink" href="#celery.pool.TaskPool.apply_async" title="Permalink to this definition">¶</a></dt>
<dd><p>Equivalent of the :func:<tt class="docutils literal"><span class="pre">apply</span></tt> built-in function.</p>
<p>All <tt class="docutils literal"><span class="pre">callbacks</span></tt> and <tt class="docutils literal"><span class="pre">errbacks</span></tt> should complete immediately since
otherwise the thread which handles the result will get blocked.</p>
</dd></dl>

<dl class="method">
<dt id="celery.pool.TaskPool.full">
<tt class="descname">full</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.pool.TaskPool.full" title="Permalink to this definition">¶</a></dt>
<dd><p>Is the pool full?</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">Returns:</th><td class="field-body"><tt class="xref docutils literal"><span class="pre">True</span></tt> if the maximum number of concurrent processes
has been reached.</td>
</tr>
</tbody>
</table>
</dd></dl>

<dl class="method">
<dt id="celery.pool.TaskPool.get_worker_pids">
<tt class="descname">get_worker_pids</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.pool.TaskPool.get_worker_pids" title="Permalink to this definition">¶</a></dt>
<dd>Returns the process id&#8217;s of all the pool workers.</dd></dl>

<dl class="method">
<dt id="celery.pool.TaskPool.on_ready">
<tt class="descname">on_ready</tt><big>(</big><em>callbacks</em>, <em>errbacks</em>, <em>meta</em>, <em>ret_value</em><big>)</big><a class="headerlink" href="#celery.pool.TaskPool.on_ready" title="Permalink to this definition">¶</a></dt>
<dd>What to do when a worker task is ready and its return value has
been collected.</dd></dl>

<dl class="method">
<dt id="celery.pool.TaskPool.on_return">
<tt class="descname">on_return</tt><big>(</big><em>tid</em>, <em>callbacks</em>, <em>errbacks</em>, <em>meta</em>, <em>ret_value</em><big>)</big><a class="headerlink" href="#celery.pool.TaskPool.on_return" title="Permalink to this definition">¶</a></dt>
<dd>What to do when the process returns.</dd></dl>

<dl class="method">
<dt id="celery.pool.TaskPool.reap">
<tt class="descname">reap</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.pool.TaskPool.reap" title="Permalink to this definition">¶</a></dt>
<dd>Reap finished tasks.</dd></dl>

<dl class="method">
<dt id="celery.pool.TaskPool.start">
<tt class="descname">start</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.pool.TaskPool.start" title="Permalink to this definition">¶</a></dt>
<dd><p>Run the task pool.</p>
<p>Will pre-fork all workers so they&#8217;re ready to accept tasks.</p>
</dd></dl>

<dl class="method">
<dt id="celery.pool.TaskPool.stop">
<tt class="descname">stop</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.pool.TaskPool.stop" title="Permalink to this definition">¶</a></dt>
<dd>Terminate the pool.</dd></dl>

<dl class="method">
<dt id="celery.pool.TaskPool.wait_for_result">
<tt class="descname">wait_for_result</tt><big>(</big><big>)</big><a class="headerlink" href="#celery.pool.TaskPool.wait_for_result" title="Permalink to this definition">¶</a></dt>
<dd><p>Waits for the first process in the pool to finish.</p>
<p>This operation is blocking.</p>
</dd></dl>

</dd></dl>

</div>


          </div>
        </div>
      </div>
      <div class="sphinxsidebar">
        <div class="sphinxsidebarwrapper">
            <h4>Previous topic</h4>
            <p class="topless"><a href="celery.worker.controllers.html"
                                  title="previous chapter">Worker Controller Threads - celery.worker.controllers</a></p>
            <h4>Next topic</h4>
            <p class="topless"><a href="celery.supervisor.html"
                                  title="next chapter">Process Supervisor - celery.supervisor</a></p>
            <h3>This Page</h3>
            <ul class="this-page-menu">
              <li><a href="../sources/reference/celery.pool.txt"
                     rel="nofollow">Show Source</a></li>
            </ul>
          <div id="searchbox" style="display: none">
            <h3>Quick search</h3>
              <form class="search" action="../search.html" method="get">
                <input type="text" name="q" size="18" />
                <input type="submit" value="Go" />
                <input type="hidden" name="check_keywords" value="yes" />
                <input type="hidden" name="area" value="default" />
              </form>
              <p class="searchtip" style="font-size: 90%">
              Enter search terms or a module, class or function name.
              </p>
          </div>
          <script type="text/javascript">$('#searchbox').show(0);</script>
        </div>
      </div>
      <div class="clearer"></div>
    </div>
    <div class="related">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="../genindex.html" title="General Index"
             >index</a></li>
        <li class="right" >
          <a href="../modindex.html" title="Global Module Index"
             >modules</a> |</li>
        <li class="right" >
          <a href="celery.supervisor.html" title="Process Supervisor - celery.supervisor"
             >next</a> |</li>
        <li class="right" >
          <a href="celery.worker.controllers.html" title="Worker Controller Threads - celery.worker.controllers"
             >previous</a> |</li>
        <li><a href="../index.html">Celery v0.3.20 (unstable) documentation</a> &raquo;</li>
          <li><a href="index.html" >Module API Reference</a> &raquo;</li> 
      </ul>
    </div>
    <div class="footer">
      &copy; Copyright 2009, Ask Solem.
      Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 0.6.2.
    </div>
  </body>
</html>