mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
215 lines
8.6 KiB
HTML
215 lines
8.6 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
|||
|
|
<!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>DbEnv::log_put()</title>
|
|||
|
|
<link rel="stylesheet" href="apiReference.css" type="text/css" />
|
|||
|
|
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
|
|||
|
|
<link rel="start" href="index.html" title="Berkeley DB C++ API Reference" />
|
|||
|
|
<link rel="up" href="lsn.html" title="Chapter 8. The DbLsn Handle" />
|
|||
|
|
<link rel="prev" href="logprintf.html" title="DbEnv::log_printf()" />
|
|||
|
|
<link rel="next" href="envlog_set_config.html" title="DbEnv::log_set_config()" />
|
|||
|
|
</head>
|
|||
|
|
<body>
|
|||
|
|
<div xmlns="" class="navheader">
|
|||
|
|
<div class="libver">
|
|||
|
|
<p>Library Version 11.2.5.2</p>
|
|||
|
|
</div>
|
|||
|
|
<table width="100%" summary="Navigation header">
|
|||
|
|
<tr>
|
|||
|
|
<th colspan="3" align="center">DbEnv::log_put()</th>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="20%" align="left"><a accesskey="p" href="logprintf.html">Prev</a> </td>
|
|||
|
|
<th width="60%" align="center">Chapter 8.
|
|||
|
|
The DbLsn Handle
|
|||
|
|
</th>
|
|||
|
|
<td width="20%" align="right"> <a accesskey="n" href="envlog_set_config.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
<hr />
|
|||
|
|
</div>
|
|||
|
|
<div class="sect1" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h2 class="title" style="clear: both"><a id="logput"></a>DbEnv::log_put()</h2>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<pre class="programlisting">#include <db_cxx.h>
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
DbEnv::log_put(DbLsn *lsn, const Dbt *data, u_int32_t flags);</pre>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::log_put()</code> method appends records to the log. The
|
|||
|
|
<a class="link" href="lsn.html" title="Chapter 8. The DbLsn Handle">DbLsn</a> of the put record is
|
|||
|
|
returned in the <span class="bold"><strong>lsn</strong></span> parameter.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::log_put()</code> <span>
|
|||
|
|
|
|||
|
|
<span>
|
|||
|
|
method either returns a non-zero error value or throws an
|
|||
|
|
exception that encapsulates a non-zero error value on
|
|||
|
|
failure, and returns 0 on success.
|
|||
|
|
</span>
|
|||
|
|
</span>
|
|||
|
|
</p>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3639208"></a>Parameters</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3639197"></a>lsn</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <span class="bold"><strong>lsn</strong></span> parameter references memory
|
|||
|
|
into which the <a class="link" href="lsn.html" title="Chapter 8. The DbLsn Handle">DbLsn</a> of
|
|||
|
|
the put record is copied.
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3638349"></a>data</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <span class="bold"><strong>data</strong></span> parameter is the record to
|
|||
|
|
write to the log.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The caller is responsible for providing any necessary structure to
|
|||
|
|
<span class="bold"><strong>data</strong></span>. (For example, in a write-ahead
|
|||
|
|
logging protocol, the application must understand what part of
|
|||
|
|
<span class="bold"><strong>data</strong></span> is an operation code, what part
|
|||
|
|
is redo information, and what part is undo information. In addition,
|
|||
|
|
most transaction managers will store in <span class="bold"><strong>data</strong></span> the
|
|||
|
|
<a class="link" href="lsn.html" title="Chapter 8. The DbLsn Handle">DbLsn</a> of the previous log
|
|||
|
|
record for the same transaction, to support chaining back through the
|
|||
|
|
transaction's log records during undo.)
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3638777"></a>flags</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <span class="bold"><strong>flags</strong></span> parameter must be set to 0
|
|||
|
|
or the following value:
|
|||
|
|
</p>
|
|||
|
|
<div class="itemizedlist">
|
|||
|
|
<ul type="disc">
|
|||
|
|
<li>
|
|||
|
|
<p><a id="put_DB_FLUSH"></a>
|
|||
|
|
<code class="literal">DB_FLUSH</code>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The log is forced to disk after this record is written, guaranteeing
|
|||
|
|
that all records with <a class="link" href="lsn.html" title="Chapter 8. The DbLsn Handle">DbLsn</a>
|
|||
|
|
values less than or equal to the one being "put" are on disk
|
|||
|
|
before <code class="methodname">DbEnv::log_put()</code> returns.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
</ul>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3639329"></a>Errors</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::log_put()</code> <span>
|
|||
|
|
|
|||
|
|
<span>
|
|||
|
|
method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a>
|
|||
|
|
exception, encapsulating one of the following non-zero errors, or return one
|
|||
|
|
of the following non-zero errors:
|
|||
|
|
</span>
|
|||
|
|
</span>
|
|||
|
|
</p>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3639499"></a>EINVAL</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
If the record to be logged is larger than the maximum log record; or
|
|||
|
|
if an invalid flag value or parameter was specified.
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3639481"></a>Class</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>,
|
|||
|
|
<a class="link" href="logc.html" title="The DbLogc Handle">DbLogc</a>,
|
|||
|
|
<a class="link" href="lsn.html" title="Chapter 8. The DbLsn Handle">DbLsn</a>
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3639520"></a>See Also</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
<a class="xref" href="lsn.html#loglist" title="Logging Subsystem and Related Methods">Logging Subsystem and Related Methods</a>
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="navfooter">
|
|||
|
|
<hr />
|
|||
|
|
<table width="100%" summary="Navigation footer">
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left"><a accesskey="p" href="logprintf.html">Prev</a> </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="u" href="lsn.html">Up</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right"> <a accesskey="n" href="envlog_set_config.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left" valign="top">DbEnv::log_printf() </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="h" href="index.html">Home</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right" valign="top"> DbEnv::log_set_config()</td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|