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<link title="Get" rel="Chapter" href="Get.html"><title>Ocamlnet 4 Reference Manual : Netlog</title>
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<h1>Module <a href="type_Netlog.html">Netlog</a></h1>
<pre><span id="MODULENetlog"><span class="keyword">module</span> Netlog</span>: <code class="code">sig</code> <a href="Netlog.html">..</a> <code class="code">end</code></pre><div class="info module top">
<div class="info-desc">
<p>Basic logging facility</p>
<p>The purpose of this module is to define a mutable logging function
which ensures to be always pointing to a valid logging implementation.
By default, the function prints the messages to stderr, prepended
by a timestamp. In Netplex context, the implementation is changed so
that the Netplex logger is used instead (see <a href="Netplex_log.html"><code class="code">Netplex_log</code></a>), and
the <code class="code">log</code> and <code class="code">logf</code> functions below have the same effect as
the counterparts in <a href="Netplex_cenv.html"><code class="code">Netplex_cenv</code></a> with the same name.</p>
</div>
</div>
<hr width="100%">
<pre><span id="TYPElevel"><span class="keyword">type</span> <code class="type"></code>level</span> = <code class="type">[ `Alert | `Crit | `Debug | `Emerg | `Err | `Info | `Notice | `Warning ]</code> </pre>
<div class="info ">
<div class="info-desc">
<p>The log levels (syslog-like)</p>
</div>
</div>
<pre><span id="TYPElogger"><span class="keyword">type</span> <code class="type"></code>logger</span> = <code class="type"><a href="Netlog.html#TYPElevel">level</a> -> string -> unit</code> </pre>
<div class="info ">
<div class="info-desc">
<p>A logging function takes a level, and the message</p>
</div>
</div>
<pre><span id="VALchannel_logger"><span class="keyword">val</span> channel_logger</span> : <code class="type">Stdlib.out_channel -> <a href="Netlog.html#TYPElevel">level</a> -> <a href="Netlog.html#TYPElogger">logger</a></code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">channel_logger ch lev</code>: Prints all messages with a level of <code class="code">lev</code>
and higher to the channel <code class="code">ch</code>. The output buffer is flushed after
each message,</p>
</div>
</div>
<pre><span id="VALcurrent_logger"><span class="keyword">val</span> current_logger</span> : <code class="type"><a href="Netlog.html#TYPElogger">logger</a> Stdlib.ref</code></pre><div class="info ">
<div class="info-desc">
<p>The variable containing the current logger function.
Defaults to <code class="code">channel_logger stderr `Debug</code> at program startup.
Assign something else to this variable in order to change the
log destination or the log level.</p>
<p>Note that the function <a href="Netplex_main.html#VALrun"><code class="code">Netplex_main.run</code></a> modifies <code class="code">current_logger</code>
so log messages are forwarded to the Netplex logger. It is then the
Netplex framework that determines log destination and level.</p>
</div>
</div>
<pre><span id="VALlog"><span class="keyword">val</span> log</span> : <code class="type"><a href="Netlog.html#TYPElevel">level</a> -> string -> unit</code></pre><div class="info ">
<div class="info-desc">
<p>Writes a log message</p>
</div>
</div>
<pre><span id="VALlogf"><span class="keyword">val</span> logf</span> : <code class="type"><a href="Netlog.html#TYPElevel">level</a> -> ('a, unit, string, unit) Stdlib.format4 -> 'a</code></pre><div class="info ">
<div class="info-desc">
<p>Writes a log message like <code class="code">printf</code></p>
</div>
</div>
<pre><span id="VALlevel_weight"><span class="keyword">val</span> level_weight</span> : <code class="type"><a href="Netlog.html#TYPElevel">level</a> -> int</code></pre><div class="info ">
<div class="info-desc">
<p>A number correspondig to the level</p>
</div>
</div>
<pre><span id="VALlevel_of_string"><span class="keyword">val</span> level_of_string</span> : <code class="type">string -> <a href="Netlog.html#TYPElevel">level</a></code></pre>
<pre><span id="VALstring_of_level"><span class="keyword">val</span> string_of_level</span> : <code class="type"><a href="Netlog.html#TYPElevel">level</a> -> string</code></pre><div class="info ">
<div class="info-desc">
<p>Convert level names to strings and vice versa</p>
</div>
</div>
<pre><span id="VALlevel_names"><span class="keyword">val</span> level_names</span> : <code class="type">string array</code></pre><div class="info ">
<div class="info-desc">
<p>The level names indexed by weight</p>
</div>
</div>
<pre><span id="TYPEformat"><span class="keyword">type</span> <code class="type"></code>format</span> = <code class="type">[ `ISO | `Std ]</code> </pre>
<pre><span id="VALformat_timestamp"><span class="keyword">val</span> format_timestamp</span> : <code class="type"><a href="Netlog.html#TYPEformat">format</a> -> int -> float * int -> string</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">format_timestamp fmt digits (seconds,nanos)</code>: Formats the timestamp
<code class="code">(seconds,nanos)</code> and returns the string. Pass in <code class="code">digits</code> the number
of digits for fractional seconds.</p>
<ul>
<li><code class="code">`Std</code>: This is the "%c" format of <code class="code">Netdate</code></li>
<li><code class="code">`ISO</code>: ISO-8601 format</li>
</ul>
</div>
</div>
<pre><span id="VALcurrent_formatter"><span class="keyword">val</span> current_formatter</span> : <code class="type">(float * int -> string) Stdlib.ref</code></pre><div class="info ">
<div class="info-desc">
<p>The current timestamp formatter</p>
<p>Example: Change the format of timestamps to ISO with a precision
of milliseconds:</p>
<pre class="codepre"><code class="code"> Netlog.current_formatter := Netlog.format_timestamp `ISO 3
</code></pre></div>
</div>
<pre><span id="MODULEDebug"><span class="keyword">module</span> <a href="Netlog.Debug.html">Debug</a></span>: <code class="code">sig</code> <a href="Netlog.Debug.html">..</a> <code class="code">end</code></pre></body></html>
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