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Initial commit of OpenSPARC T2 architecture model.
[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / html / python / lib / node348.html
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55<H3><A NAME="SECTION0082953000000000000000">
566.29.5.3 RotatingFileHandler</A>
57</H3>
58
59<P>
60The <tt class="class">RotatingFileHandler</tt> class supports rotation of disk log files.
61
62<P>
63<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
64 <td><nobr><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-2513' xml:id='l2h-2513' class="class">RotatingFileHandler</tt></b>(</nobr></td>
65 <td><var>filename</var><big>[</big><var>, mode</var><big>[</big><var>,
66 maxBytes</var><big>[</big><var>, backupCount</var><big>]</big><var></var><big>]</big><var></var><big>]</big><var></var>)</td></tr></table></dt>
67<dd>
68Returns a new instance of the <tt class="class">RotatingFileHandler</tt> class. The
69specified file is opened and used as the stream for logging. If
70<var>mode</var> is not specified, <code>'a'</code> is used. By default, the
71file grows indefinitely.
72
73<P>
74You can use the <var>maxBytes</var> and
75<var>backupCount</var> values to allow the file to <i class="dfn">rollover</i> at a
76predetermined size. When the size is about to be exceeded, the file is
77closed and a new file is silently opened for output. Rollover occurs
78whenever the current log file is nearly <var>maxBytes</var> in length; if
79<var>maxBytes</var> is zero, rollover never occurs. If <var>backupCount</var>
80is non-zero, the system will save old log files by appending the
81extensions ".1", ".2" etc., to the filename. For example, with
82a <var>backupCount</var> of 5 and a base file name of
83<span class="file">app.log</span>, you would get <span class="file">app.log</span>,
84<span class="file">app.log.1</span>, <span class="file">app.log.2</span>, up to <span class="file">app.log.5</span>. The file being
85written to is always <span class="file">app.log</span>. When this file is filled, it is
86closed and renamed to <span class="file">app.log.1</span>, and if files <span class="file">app.log.1</span>,
87<span class="file">app.log.2</span>, etc. exist, then they are renamed to <span class="file">app.log.2</span>,
88<span class="file">app.log.3</span> etc. respectively.
89</dl>
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92<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
93 <td><nobr><b><tt id='l2h-2514' xml:id='l2h-2514' class="method">doRollover</tt></b>(</nobr></td>
94 <td><var></var>)</td></tr></table></dt>
95<dd>
96Does a rollover, as described above.
97</dl>
98
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101 <td><nobr><b><tt id='l2h-2515' xml:id='l2h-2515' class="method">emit</tt></b>(</nobr></td>
102 <td><var>record</var>)</td></tr></table></dt>
103<dd>
104Outputs the record to the file, catering for rollover as described previously.
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143<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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Full OpenSPARC architecture tarball including simulator, hypervisor, and OBP.