2011-09-13 17:44:24 +00:00
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Berkeley DB X/Open Compliant XA Resource Manager</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB Installation and Build Guide" />
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<link rel="up" href="upgrade_52_toc.html" title="Chapter 9. Upgrading Berkeley DB 11.2.5.1 applications to Berkeley DB 11.2.5.2" />
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<link rel="prev" href="upgrade_11gr2_52_seq_sql.html" title="Sequence Support in the SQL Layer" />
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<link rel="next" href="upgrade_11gr2_52_hot_backup.html" title="Hot Backup Changes" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Berkeley DB X/Open Compliant XA Resource Manager </th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_11gr2_52_seq_sql.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 9.
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Upgrading Berkeley DB 11.2.5.1 applications to Berkeley DB 11.2.5.2
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="upgrade_11gr2_52_hot_backup.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="upgrade_11gr2_52_xa"></a>Berkeley DB X/Open Compliant XA Resource Manager </h2>
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</div>
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</div>
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</div>
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<div class="toc">
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<dl>
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<dt>
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<span class="sect2">
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2011-12-20 00:07:10 +00:00
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<a href="upgrade_11gr2_52_xa.html#id3647680">Constraints</a>
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2011-09-13 17:44:24 +00:00
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</span>
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</dt>
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<dt>
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<span class="sect2">
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2011-12-20 00:07:10 +00:00
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<a href="upgrade_11gr2_52_xa.html#id3647771">New Flag</a>
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2011-09-13 17:44:24 +00:00
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</span>
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</dt>
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<dt>
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<span class="sect2">
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2011-12-20 00:07:10 +00:00
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<a href="upgrade_11gr2_52_xa.html#id3647841">Modified Function</a>
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2011-09-13 17:44:24 +00:00
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</span>
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</dt>
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</dl>
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</div>
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<p>
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The Berkeley DB X/open compliant XA resource manager has been
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restored. (It was removed from the product after the 4.7 release.)
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The new implementation includes support for multi-threaded servers.
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Consult the documentation of your chosen transaction manager to
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learn how to implement a multi-threaded server.
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3647680"></a>Constraints</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<p>
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Applictions that use a BDB XA resource manager must now take
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into account the following constraints.
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</p>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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No in-memory logging.
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</li>
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<li>
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No application-level child transactions.
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</li>
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<li>
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All database-level operations (open, close, create
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and the like) must be performed outside of a global
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transactions (i.e., they can be performed in local
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BDB transactions, but not while a distributed
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XA transaction is active).
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</li>
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<li>
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Environment configuration must be done using a
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DB_CONFIG file.
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</li>
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<li>
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Cursors must be closed before a service invocation
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returns.
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</li>
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</ul>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3647771"></a>New Flag</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<div class="itemizedlist">
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<ul type="disc">
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<li><code class="literal">DB_XA_CREATE</code> - This flag is passed to
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<a href="../api_reference/C/dbcreate.html" class="olink">db_create()</a> to create a <code class="literal">DB</code> handle that
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supports XA transactions.
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</li>
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</ul>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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2011-12-20 00:07:10 +00:00
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<h3 class="title"><a id="id3647841"></a>Modified Function</h3>
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2011-09-13 17:44:24 +00:00
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</div>
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</div>
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</div>
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<div class="itemizedlist">
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<ul type="disc">
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<li><a href="../api_reference/C/dbstat.html" class="olink">DB->stat()</a> now returns the field
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<code class="literal">DB_TXN_STAT->DB_TXN_ACTIVE->xa_status</code>, which
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contains information on the XA transactions.
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</li>
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</ul>
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</div>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="upgrade_11gr2_52_seq_sql.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="upgrade_52_toc.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="upgrade_11gr2_52_hot_backup.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Sequence Support in the SQL Layer </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> Hot Backup Changes </td>
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