twisted.flow.stage.Concurrent.html [plain text]
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>twisted.flow.stage.Concurrent</title>
<link rel="stylesheet" href="epydoc.css" type="text/css"></link>
</head>
<body bgcolor="white" text="black" link="blue" vlink="#204080"
alink="#204080">
<!-- =========== START OF NAVBAR =========== -->
<table class="navbar" border="0" width="100%" cellpadding="0" bgcolor="#a0c0ff" cellspacing="0">
<tr valign="center">
<th class="navbar"> <a class="navbar" href="twisted.html">Home</a> </th>
<th class="navbar"> <a class="navbar" href="trees.html">Trees</a> </th>
<th class="navbar"> <a class="navbar" href="indices.html">Index</a> </th>
<th class="navbar"> <a class="navbar" href="help.html">Help</a> </th>
<th class="navbar" align="right" width="100%">
<table border="0" cellpadding="0" cellspacing="0">
<tr><th class="navbar" align="center">
<p class="nomargin">
<a class="navbar" target="_top" href="http://twistedmatrix.com/">Twisted 1.3.0rc1</a>
</p></th></tr></table>
</th>
</tr>
</table>
<table width="100%" cellpadding="0" cellspacing="0">
<tr valign="top">
<td width="100%">
<font size="-1"><b class="breadcrumbs">
<a href="twisted.html">Package twisted</a> ::
<a href="twisted.flow.html">Package flow</a> ::
<a href="twisted.flow.stage.html">Module stage</a> ::
Class Concurrent
</b></font></br>
</td>
<td><table cellpadding="0" cellspacing="0">
<tr><td align="right"><font size="-2">[<a href="frames.html"target="_top">frames</a> | <a href="twisted.flow.stage.Concurrent.html" target="_top">no frames</a>]</font></td></tr>
</table></td>
</tr></table>
<!-- =========== START OF CLASS DESCRIPTION =========== -->
<h2 class="class">Class Concurrent</h2>
<pre class="base-tree">
<a href="twisted.flow.base.Instruction.html"><code>Instruction</code></a> --+
|
<a href="twisted.flow.base.Stage.html"><code>Stage</code></a> --+
|
<b>Concurrent</b>
</pre><br />
<hr/>
<p>Executes stages concurrently</p>
This stage allows two or more stages (branches) to be executed at the
same time. It returns each stage as it becomes available. This can be
used if you have N callbacks, and you want to yield and wait for the
first available one that produces results. Once a stage is retuned, its
next() method should be used to extract the value for the stage.
<hr/>
<!-- =========== START OF METHOD SUMMARY =========== -->
<table class="summary" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="summary">
<th colspan="2">Method Summary</th></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1"> </font></td>
<td><code><a name="__init__"></a><span class="summary-sig"><span class="summary-sig-name">__init__</span>(<span class=summary-sig-arg>self</span>,
<span class="summary-sig-vararg">*stages</span>)</span></code>
</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1"> </font></td>
<td><code><span class="summary-sig"><a href="twisted.flow.stage.Concurrent.html#_yield" class="summary-sig-name"><code>_yield</code></a>(<span class=summary-sig-arg>self</span>)</span></code>
<br />
executed during a yield statement by previous stage</td></tr>
<tr bgcolor="#e8f0f8" class="group">
<th colspan="2"> Inherited from Stage</th></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1"> </font></td>
<td><code><span class="summary-sig"><a href="twisted.flow.base.Stage.html#__iter__" class="summary-sig-name"><code>__iter__</code></a>(<span class=summary-sig-arg>self</span>)</span></code>
</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1"> </font></td>
<td><code><span class="summary-sig"><a href="twisted.flow.base.Stage.html#next" class="summary-sig-name"><code>next</code></a>(<span class=summary-sig-arg>self</span>)</span></code>
<br />
return current result</td></tr>
</table><br />
<!-- =========== START OF CLASS VARIABLE SUMMARY =========== -->
<table class="summary" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="summary">
<th colspan="2">Class Variable Summary</th></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1"><code>class</code></font></td>
<td><a name="Instruction"></a><b><code>Instruction</code></b> = <a href="twisted.flow.stage.Instruction.html"><code>twisted.flow.stage.Instruction</code></a></td></tr>
</table><br />
<!-- =========== START OF METHOD DETAILS =========== -->
<table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="details">
<th colspan="2">Method Details</th></tr>
</table>
<a name="_yield"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
<h3><span class="sig"><span class="sig-name">_yield</span>(<span class=sig-arg>self</span>)</span>
</h3>
<p>executed during a yield statement by previous stage</p>
This method is private within the scope of the flow module, it is
used by one stage in the flow to ask a subsequent stage to produce its
value. The result of the yield is then stored in self.result and is an
instance of Failure if a problem occurred.
<dl><dt></dt><dd>
<dl><dt><b>Overrides:</b></dt>
<dd><a href="twisted.flow.base.Stage.html#_yield"><code>twisted.flow.base.Stage._yield</code></a> <i>(inherited documentation)</i>
</dd>
</dl>
</dd></dl>
</td></tr></table>
<br />
<!-- =========== START OF NAVBAR =========== -->
<table class="navbar" border="0" width="100%" cellpadding="0" bgcolor="#a0c0ff" cellspacing="0">
<tr valign="center">
<th class="navbar"> <a class="navbar" href="twisted.html">Home</a> </th>
<th class="navbar"> <a class="navbar" href="trees.html">Trees</a> </th>
<th class="navbar"> <a class="navbar" href="indices.html">Index</a> </th>
<th class="navbar"> <a class="navbar" href="help.html">Help</a> </th>
<th class="navbar" align="right" width="100%">
<table border="0" cellpadding="0" cellspacing="0">
<tr><th class="navbar" align="center">
<p class="nomargin">
<a class="navbar" target="_top" href="http://twistedmatrix.com/">Twisted 1.3.0rc1</a>
</p></th></tr></table>
</th>
</tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left"><font size="-2">Generated by Epydoc 2.0 on Sat May 15 20:07:42 2004</font></td>
<td align="right"><a href="http://epydoc.sourceforge.net"
><font size="-2">http://epydoc.sf.net</font></a></td>
</tr>
</table>
</body>
</html>