mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
218 lines
10 KiB
HTML
218 lines
10 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>Chapter 12. The DB_TXN Handle</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="index.html" title="Berkeley DB C API Reference" />
|
||
<link rel="prev" href="seqstat_print.html" title="DB_SEQUENCE->stat_print()" />
|
||
<link rel="next" href="dbget_transactional.html" title="DB->get_transactional()" />
|
||
</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">Chapter 12.
|
||
The DB_TXN Handle
|
||
</th>
|
||
</tr>
|
||
<tr>
|
||
<td width="20%" align="left"><a accesskey="p" href="seqstat_print.html">Prev</a> </td>
|
||
<th width="60%" align="center"> </th>
|
||
<td width="20%" align="right"> <a accesskey="n" href="dbget_transactional.html">Next</a></td>
|
||
</tr>
|
||
</table>
|
||
<hr />
|
||
</div>
|
||
<div class="chapter" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h2 class="title"><a id="txn"></a>Chapter 12.
|
||
The DB_TXN Handle
|
||
</h2>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<pre class="programlisting">#include <db.h>
|
||
|
||
typedef struct __db_txn DB_TXN; </pre>
|
||
<p>
|
||
The <code class="classname">DB_TXN</code> object is the handle for a transaction. Methods of
|
||
the <code class="classname">DB_TXN</code> handle are used to configure, abort and commit the
|
||
transaction. <code class="classname">DB_TXN</code> handles are provided to
|
||
<a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a> methods in order
|
||
to transactionally protect those database operations.
|
||
</p>
|
||
<p>
|
||
<code class="classname">DB_TXN</code> handles are not free-threaded; transactions handles
|
||
may be used by multiple threads, but only serially, that is, the application must
|
||
serialize access to the <code class="classname">DB_TXN</code> handle. Once the
|
||
<a class="xref" href="txnabort.html" title="DB_TXN->abort()">DB_TXN->abort()</a> or
|
||
<a class="xref" href="txncommit.html" title="DB_TXN->commit()">DB_TXN->commit()</a> methods are called, the handle
|
||
may not be accessed again, regardless of the method's return. In addition, parent
|
||
transactions may not issue any Berkeley DB operations while they have active child
|
||
transactions (child transactions that have not yet been committed or aborted) except for
|
||
<a class="xref" href="txnbegin.html" title="DB_ENV->txn_begin()">DB_ENV->txn_begin()</a>,
|
||
<a class="xref" href="txnabort.html" title="DB_TXN->abort()">DB_TXN->abort()</a> and
|
||
<a class="xref" href="txncommit.html" title="DB_TXN->commit()">DB_TXN->commit()</a>.
|
||
</p>
|
||
<div class="sect1" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h2 class="title" style="clear: both"><a id="txnlist"></a>Transaction Subsystem and Related Methods</h2>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="navtable">
|
||
<table border="1" width="80%">
|
||
<thead>
|
||
<tr>
|
||
<th>Transaction Subsystem and Related Methods</th>
|
||
<th>Description</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txnrecover.html" title="DB_ENV->txn_recover()">DB_ENV->txn_recover()</a>
|
||
</td>
|
||
<td>Distributed transaction recovery</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txncheckpoint.html" title="DB_ENV->txn_checkpoint()">DB_ENV->txn_checkpoint()</a>
|
||
</td>
|
||
<td>Checkpoint the transaction subsystem</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txnstat.html" title="DB_ENV->txn_stat()">DB_ENV->txn_stat()</a>
|
||
</td>
|
||
<td>Return transaction subsystem statistics</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txnstat_print.html" title="DB_ENV->txn_stat_print()">DB_ENV->txn_stat_print()</a>
|
||
</td>
|
||
<td>Print transaction subsystem statistics</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txnset_timeout.html" title="DB_TXN->set_timeout()">DB_TXN->set_timeout()</a>
|
||
</td>
|
||
<td>Set transaction timeout</td>
|
||
</tr>
|
||
<tr>
|
||
<td colspan="2">
|
||
<span class="bold">
|
||
<strong>Transaction Subsystem Configuration</strong>
|
||
</span>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><a class="xref" href="envset_timeout.html" title="DB_ENV->set_timeout()">DB_ENV->set_timeout()</a>, <a class="xref" href="envget_timeout.html" title="DB_ENV->get_timeout()">DB_ENV->get_timeout()</a></td>
|
||
<td>Set/get lock and transaction timeout</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="dbget_transactional.html" title="DB->get_transactional()">DB->get_transactional()</a>
|
||
</td>
|
||
<td>Does the DB have transaction support</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="envcdsgroup_begin.html" title="DB_ENV->cdsgroup_begin()">DB_ENV->cdsgroup_begin()</a>
|
||
</td>
|
||
<td>Get a locker ID in Berkeley DB Concurrent Data Store</td>
|
||
</tr>
|
||
<tr>
|
||
<td><a class="xref" href="envset_tx_max.html" title="DB_ENV->set_tx_max()">DB_ENV->set_tx_max()</a>, <a class="xref" href="envget_tx_max.html" title="DB_ENV->get_tx_max()">DB_ENV->get_tx_max()</a></td>
|
||
<td>Set/get maximum number of transactions</td>
|
||
</tr>
|
||
<tr>
|
||
<td><a class="xref" href="envset_tx_timestamp.html" title="DB_ENV->set_tx_timestamp()">DB_ENV->set_tx_timestamp()</a>, <a class="xref" href="envget_tx_timestamp.html" title="DB_ENV->get_tx_timestamp()">DB_ENV->get_tx_timestamp()</a></td>
|
||
<td>Set/get recovery timestamp</td>
|
||
</tr>
|
||
<tr>
|
||
<td colspan="2">
|
||
<span class="bold">
|
||
<strong>Transaction Operations</strong>
|
||
</span>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txnbegin.html" title="DB_ENV->txn_begin()">DB_ENV->txn_begin()</a>
|
||
</td>
|
||
<td>Begin a transaction</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txnabort.html" title="DB_TXN->abort()">DB_TXN->abort()</a>
|
||
</td>
|
||
<td>Abort a transaction</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txncommit.html" title="DB_TXN->commit()">DB_TXN->commit()</a>
|
||
</td>
|
||
<td>Commit a transaction</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txndiscard.html" title="DB_TXN->discard()">DB_TXN->discard()</a>
|
||
</td>
|
||
<td>Discard a prepared but not resolved transaction handle</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txnid.html" title="DB_TXN->id()">DB_TXN->id()</a>
|
||
</td>
|
||
<td>Return a transaction's ID</td>
|
||
</tr>
|
||
<tr>
|
||
<td>
|
||
<a class="xref" href="txnprepare.html" title="DB_TXN->prepare()">DB_TXN->prepare()</a>
|
||
</td>
|
||
<td>Prepare a transaction for commit</td>
|
||
</tr>
|
||
<tr>
|
||
<td><a class="xref" href="txnset_name.html" title="DB_TXN->set_name()">DB_TXN->set_name()</a>, <a class="xref" href="txnget_name.html" title="DB_TXN->get_name()">DB_TXN->get_name()</a></td>
|
||
<td>Associate a string with a transaction</td>
|
||
</tr>
|
||
<tr>
|
||
<td><a class="xref" href="txnset_priority.html" title="DB_TXN->set_priority()">DB_TXN->set_priority()</a>, <a class="xref" href="txnget_priority.html" title="DB_TXN->get_priority()">DB_TXN->get_priority()</a></td>
|
||
<td>Set/get transaction's priority</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="navfooter">
|
||
<hr />
|
||
<table width="100%" summary="Navigation footer">
|
||
<tr>
|
||
<td width="40%" align="left"><a accesskey="p" href="seqstat_print.html">Prev</a> </td>
|
||
<td width="20%" align="center"> </td>
|
||
<td width="40%" align="right"> <a accesskey="n" href="dbget_transactional.html">Next</a></td>
|
||
</tr>
|
||
<tr>
|
||
<td width="40%" align="left" valign="top">DB_SEQUENCE->stat_print() </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="h" href="index.html">Home</a>
|
||
</td>
|
||
<td width="40%" align="right" valign="top"> DB->get_transactional()</td>
|
||
</tr>
|
||
</table>
|
||
</div>
|
||
</body>
|
||
</html>
|