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<ul>
<li><a class="reference internal" href="#">log.handlers</a><ul>
<li><a class="reference internal" href="#module-zmq.log.handlers">Module: <tt class="docutils literal"><span class="pre">log.handlers</span></tt></a><ul>
<li><a class="reference internal" href="#authors">Authors</a></li>
</ul>
</li>
<li><a class="reference internal" href="#classes">Classes</a><ul>
<li><a class="reference internal" href="#pubhandler"><tt class="docutils literal"><span class="pre">PUBHandler</span></tt></a></li>
<li><a class="reference internal" href="#topiclogger"><tt class="docutils literal"><span class="pre">TopicLogger</span></tt></a></li>
</ul>
</li>
</ul>
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<div class="section" id="log-handlers">
<h1>log.handlers<a class="headerlink" href="#log-handlers" title="Permalink to this headline">¶</a></h1>
<div class="section" id="module-zmq.log.handlers">
<span id="module-log-handlers"></span><h2>Module: <tt class="xref py py-mod docutils literal"><span class="pre">log.handlers</span></tt><a class="headerlink" href="#module-zmq.log.handlers" title="Permalink to this headline">¶</a></h2>
<p>pyzmq logging handlers.</p>
<p>This mainly defines the PUBHandler object for publishing logging messages over
a zmq.PUB socket.</p>
<p>The PUBHandler can be used with the regular logging module, as in:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">logging</span>
<span class="gp">>>> </span><span class="n">handler</span> <span class="o">=</span> <span class="n">PUBHandler</span><span class="p">(</span><span class="s">'tcp://127.0.0.1:12345'</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">handler</span><span class="o">.</span><span class="n">root_topic</span> <span class="o">=</span> <span class="s">'foo'</span>
<span class="gp">>>> </span><span class="n">logger</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="s">'foobar'</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">logger</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">DEBUG</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">logger</span><span class="o">.</span><span class="n">addHandler</span><span class="p">(</span><span class="n">handler</span><span class="p">)</span>
</pre></div>
</div>
<p>After this point, all messages logged by <tt class="docutils literal"><span class="pre">logger</span></tt> will be published on the
PUB socket.</p>
<p>Code adapted from StarCluster:</p>
<blockquote>
<div><a class="reference external" href="http://github.com/jtriley/StarCluster/blob/master/starcluster/logger.py">http://github.com/jtriley/StarCluster/blob/master/starcluster/logger.py</a></div></blockquote>
<div class="section" id="authors">
<h3>Authors<a class="headerlink" href="#authors" title="Permalink to this headline">¶</a></h3>
<ul class="simple">
<li>Min RK</li>
</ul>
</div>
</div>
<div class="section" id="classes">
<h2>Classes<a class="headerlink" href="#classes" title="Permalink to this headline">¶</a></h2>
<div class="section" id="pubhandler">
<h3><a class="reference internal" href="#zmq.log.handlers.PUBHandler" title="zmq.log.handlers.PUBHandler"><tt class="xref py py-class docutils literal"><span class="pre">PUBHandler</span></tt></a><a class="headerlink" href="#pubhandler" title="Permalink to this headline">¶</a></h3>
<dl class="class">
<dt id="zmq.log.handlers.PUBHandler">
<em class="property">class </em><tt class="descclassname">zmq.log.handlers.</tt><tt class="descname">PUBHandler</tt><big>(</big><em>interface_or_socket</em>, <em>context=None</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler" title="Permalink to this definition">¶</a></dt>
<dd><p>A basic logging handler that emits log messages through a PUB socket.</p>
<p>Takes a PUB socket already bound to interfaces or an interface to bind to.</p>
<p>Example:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">sock</span> <span class="o">=</span> <span class="n">context</span><span class="o">.</span><span class="n">socket</span><span class="p">(</span><span class="n">zmq</span><span class="o">.</span><span class="n">PUB</span><span class="p">)</span>
<span class="n">sock</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="s">'inproc://log'</span><span class="p">)</span>
<span class="n">handler</span> <span class="o">=</span> <span class="n">PUBHandler</span><span class="p">(</span><span class="n">sock</span><span class="p">)</span>
</pre></div>
</div>
<p>Or:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">handler</span> <span class="o">=</span> <span class="n">PUBHandler</span><span class="p">(</span><span class="s">'inproc://loc'</span><span class="p">)</span>
</pre></div>
</div>
<p>These are equivalent.</p>
<p>Log messages handled by this handler are broadcast with ZMQ topics
<tt class="docutils literal"><span class="pre">this.root_topic</span></tt> comes first, followed by the log level
(DEBUG,INFO,etc.), followed by any additional subtopics specified in the
message by: log.debug(“subtopic.subsub::the real message”)</p>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.acquire">
<tt class="descname">acquire</tt><big>(</big><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.acquire" title="Permalink to this definition">¶</a></dt>
<dd><p>Acquire the I/O thread lock.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.addFilter">
<tt class="descname">addFilter</tt><big>(</big><em>filter</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.addFilter" title="Permalink to this definition">¶</a></dt>
<dd><p>Add the specified filter to this handler.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.close">
<tt class="descname">close</tt><big>(</big><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.close" title="Permalink to this definition">¶</a></dt>
<dd><p>Tidy up any resources used by the handler.</p>
<p>This version does removes the handler from an internal list
of handlers which is closed when shutdown() is called. Subclasses
should ensure that this gets called from overridden close()
methods.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.createLock">
<tt class="descname">createLock</tt><big>(</big><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.createLock" title="Permalink to this definition">¶</a></dt>
<dd><p>Acquire a thread lock for serializing access to the underlying I/O.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.emit">
<tt class="descname">emit</tt><big>(</big><em>record</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.emit" title="Permalink to this definition">¶</a></dt>
<dd><p>Emit a log message on my socket.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.filter">
<tt class="descname">filter</tt><big>(</big><em>record</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.filter" title="Permalink to this definition">¶</a></dt>
<dd><p>Determine if a record is loggable by consulting all the filters.</p>
<p>The default is to allow the record to be logged; any filter can veto
this and the record is then dropped. Returns a zero value if a record
is to be dropped, else non-zero.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.flush">
<tt class="descname">flush</tt><big>(</big><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.flush" title="Permalink to this definition">¶</a></dt>
<dd><p>Ensure all logging output has been flushed.</p>
<p>This version does nothing and is intended to be implemented by
subclasses.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.format">
<tt class="descname">format</tt><big>(</big><em>record</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.format" title="Permalink to this definition">¶</a></dt>
<dd><p>Format a record.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.handle">
<tt class="descname">handle</tt><big>(</big><em>record</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.handle" title="Permalink to this definition">¶</a></dt>
<dd><p>Conditionally emit the specified logging record.</p>
<p>Emission depends on filters which may have been added to the handler.
Wrap the actual emission of the record with acquisition/release of
the I/O thread lock. Returns whether the filter passed the record for
emission.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.handleError">
<tt class="descname">handleError</tt><big>(</big><em>record</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.handleError" title="Permalink to this definition">¶</a></dt>
<dd><p>Handle errors which occur during an emit() call.</p>
<p>This method should be called from handlers when an exception is
encountered during an emit() call. If raiseExceptions is false,
exceptions get silently ignored. This is what is mostly wanted
for a logging system - most users will not care about errors in
the logging system, they are more interested in application errors.
You could, however, replace this with a custom handler if you wish.
The record which was being processed is passed in to this method.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.release">
<tt class="descname">release</tt><big>(</big><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.release" title="Permalink to this definition">¶</a></dt>
<dd><p>Release the I/O thread lock.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.removeFilter">
<tt class="descname">removeFilter</tt><big>(</big><em>filter</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.removeFilter" title="Permalink to this definition">¶</a></dt>
<dd><p>Remove the specified filter from this handler.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.setFormatter">
<tt class="descname">setFormatter</tt><big>(</big><em>fmt</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.setFormatter" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the formatter for this handler.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.PUBHandler.setLevel">
<tt class="descname">setLevel</tt><big>(</big><em>level</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.PUBHandler.setLevel" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the logging level of this handler.</p>
</dd></dl>
</dd></dl>
</div>
<div class="section" id="topiclogger">
<h3><a class="reference internal" href="#zmq.log.handlers.TopicLogger" title="zmq.log.handlers.TopicLogger"><tt class="xref py py-class docutils literal"><span class="pre">TopicLogger</span></tt></a><a class="headerlink" href="#topiclogger" title="Permalink to this headline">¶</a></h3>
<dl class="class">
<dt id="zmq.log.handlers.TopicLogger">
<em class="property">class </em><tt class="descclassname">zmq.log.handlers.</tt><tt class="descname">TopicLogger</tt><big>(</big><em>name</em>, <em>level=0</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger" title="Permalink to this definition">¶</a></dt>
<dd><p>A simple wrapper that takes an additional argument to log methods.</p>
<p>All the regular methods exist, but instead of one msg argument, two
arguments: topic, msg are passed.</p>
<p>That is:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s">'msg'</span><span class="p">)</span>
</pre></div>
</div>
<p>Would become:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s">'topic.sub'</span><span class="p">,</span> <span class="s">'msg'</span><span class="p">)</span>
</pre></div>
</div>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.addFilter">
<tt class="descname">addFilter</tt><big>(</big><em>filter</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.addFilter" title="Permalink to this definition">¶</a></dt>
<dd><p>Add the specified filter to this handler.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.addHandler">
<tt class="descname">addHandler</tt><big>(</big><em>hdlr</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.addHandler" title="Permalink to this definition">¶</a></dt>
<dd><p>Add the specified handler to this logger.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.callHandlers">
<tt class="descname">callHandlers</tt><big>(</big><em>record</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.callHandlers" title="Permalink to this definition">¶</a></dt>
<dd><p>Pass a record to all relevant handlers.</p>
<p>Loop through all handlers for this logger and its parents in the
logger hierarchy. If no handler was found, output a one-off error
message to sys.stderr. Stop searching up the hierarchy whenever a
logger with the “propagate” attribute set to zero is found - that
will be the last logger whose handlers are called.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.critical">
<tt class="descname">critical</tt><big>(</big><em>level</em>, <em>topic</em>, <em>msg</em>, <em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.critical" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.debug">
<tt class="descname">debug</tt><big>(</big><em>level</em>, <em>topic</em>, <em>msg</em>, <em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.debug" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.error">
<tt class="descname">error</tt><big>(</big><em>level</em>, <em>topic</em>, <em>msg</em>, <em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.error" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.exception">
<tt class="descname">exception</tt><big>(</big><em>msg</em>, <em>*args</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.exception" title="Permalink to this definition">¶</a></dt>
<dd><p>Convenience method for logging an ERROR with exception information.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.fatal">
<tt class="descname">fatal</tt><big>(</big><em>level</em>, <em>topic</em>, <em>msg</em>, <em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.fatal" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.filter">
<tt class="descname">filter</tt><big>(</big><em>record</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.filter" title="Permalink to this definition">¶</a></dt>
<dd><p>Determine if a record is loggable by consulting all the filters.</p>
<p>The default is to allow the record to be logged; any filter can veto
this and the record is then dropped. Returns a zero value if a record
is to be dropped, else non-zero.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.findCaller">
<tt class="descname">findCaller</tt><big>(</big><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.findCaller" title="Permalink to this definition">¶</a></dt>
<dd><p>Find the stack frame of the caller so that we can note the source
file name, line number and function name.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.getEffectiveLevel">
<tt class="descname">getEffectiveLevel</tt><big>(</big><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.getEffectiveLevel" title="Permalink to this definition">¶</a></dt>
<dd><p>Get the effective level for this logger.</p>
<p>Loop through this logger and its parents in the logger hierarchy,
looking for a non-zero logging level. Return the first one found.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.handle">
<tt class="descname">handle</tt><big>(</big><em>record</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.handle" title="Permalink to this definition">¶</a></dt>
<dd><p>Call the handlers for the specified record.</p>
<p>This method is used for unpickled records received from a socket, as
well as those created locally. Logger-level filtering is applied.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.info">
<tt class="descname">info</tt><big>(</big><em>msg</em>, <em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.info" title="Permalink to this definition">¶</a></dt>
<dd><p>Log ‘msg % args’ with severity ‘INFO’.</p>
<p>To pass exception information, use the keyword argument exc_info with
a true value, e.g.</p>
<p>logger.info(“Houston, we have a %s”, “interesting problem”, exc_info=1)</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.isEnabledFor">
<tt class="descname">isEnabledFor</tt><big>(</big><em>level</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.isEnabledFor" title="Permalink to this definition">¶</a></dt>
<dd><p>Is this logger enabled for level ‘level’?</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.log">
<tt class="descname">log</tt><big>(</big><em>level</em>, <em>topic</em>, <em>msg</em>, <em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.log" title="Permalink to this definition">¶</a></dt>
<dd><p>Log ‘msg % args’ with level and topic.</p>
<p>To pass exception information, use the keyword argument exc_info
with a True value:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">logger</span><span class="o">.</span><span class="n">log</span><span class="p">(</span><span class="n">level</span><span class="p">,</span> <span class="s">"zmq.fun"</span><span class="p">,</span> <span class="s">"We have a </span><span class="si">%s</span><span class="s">"</span><span class="p">,</span>
<span class="s">"mysterious problem"</span><span class="p">,</span> <span class="n">exc_info</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.makeRecord">
<tt class="descname">makeRecord</tt><big>(</big><em>name</em>, <em>level</em>, <em>fn</em>, <em>lno</em>, <em>msg</em>, <em>args</em>, <em>exc_info</em>, <em>func=None</em>, <em>extra=None</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.makeRecord" title="Permalink to this definition">¶</a></dt>
<dd><p>A factory method which can be overridden in subclasses to create
specialized LogRecords.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.removeFilter">
<tt class="descname">removeFilter</tt><big>(</big><em>filter</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.removeFilter" title="Permalink to this definition">¶</a></dt>
<dd><p>Remove the specified filter from this handler.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.removeHandler">
<tt class="descname">removeHandler</tt><big>(</big><em>hdlr</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.removeHandler" title="Permalink to this definition">¶</a></dt>
<dd><p>Remove the specified handler from this logger.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.setLevel">
<tt class="descname">setLevel</tt><big>(</big><em>level</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.setLevel" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the logging level of this logger.</p>
</dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.warn">
<tt class="descname">warn</tt><big>(</big><em>level</em>, <em>topic</em>, <em>msg</em>, <em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.warn" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="zmq.log.handlers.TopicLogger.warning">
<tt class="descname">warning</tt><big>(</big><em>level</em>, <em>topic</em>, <em>msg</em>, <em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#zmq.log.handlers.TopicLogger.warning" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
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