<?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>DB_ENV->txn_applied()</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="rep.html" title="Chapter 10. Replication Methods" /> <link rel="prev" href="repmgrstat_print.html" title="DB_ENV->repmgr_stat_print()" /> <link rel="next" href="txnset_commit_token.html" title="DB_TXN->set_commit_token()" /> </head> <body> <div xmlns="" class="navheader"> <div class="libver"> <p>Library Version 11.2.5.3</p> </div> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">DB_ENV->txn_applied()</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="repmgrstat_print.html">Prev</a> </td> <th width="60%" align="center">Chapter 10. Replication Methods </th> <td width="20%" align="right"> <a accesskey="n" href="txnset_commit_token.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="envtxn_applied"></a>DB_ENV->txn_applied()</h2> </div> </div> </div> <pre class="programlisting">#include <db.h> int DB_ENV->txn_applied(DB_ENV *env, DB_TXN_TOKEN *token, db_timeout_t timeout, u_int32_t flags); </pre> <p> The <code class="methodname">DB_ENV->txn_applied()</code> method checks to see if a specified transaction has been replicated from the master of a replication group. It may be called by applications using either the Base API or the Replication Manager. </p> <p> If the transaction has not yet arrived, this method will block for the amount of time specified on the <code class="literal">timeout</code> parameter while it waits for the result to be determined. For more information, please refer to the <a href="../../programmer_reference/rep_ryw.html" class="olink">Read your writes consistency</a> section in the <em class="citetitle">Berkeley DB Programmer's Reference Guide</em>. </p> <p> The <code class="methodname">DB_ENV->txn_applied()</code> method may not be called before the <a class="xref" href="envopen.html" title="DB_ENV->open()">DB_ENV->open()</a> method. </p> <p> The <code class="methodname">DB_ENV->txn_applied()</code> method returns a non-zero error on failure and 0 to indicate that the specified transaction has been applied at the local site. It may also return one of the following non-zero return codes: </p> <div class="itemizedlist"> <ul type="disc"> <li> <p> <code class="literal">DB_TIMEOUT</code> </p> <p> Returned if the specified transaction has not yet arrived at the calling site, but can be expected to arrive soon. If a non-zero timeout parameter is given, the this method always waits for the specified amount of time before returning <code class="literal">DB_TIMEOUT</code>. </p> </li> <li> <p> <code class="literal">DB_NOTFOUND</code> </p> <p> Returned if the transaction is expected to never arrive. This occurs if the transaction has not been applied at the local site because the transaction has been rolled back due to a master takeover. </p> </li> </ul> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp62475912"></a>Parameters</h3> </div> </div> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp62467032"></a>flags</h4> </div> </div> </div> <p> The <span class="bold"><strong>flags</strong></span> parameter is currently unused, and must be set to 0. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp62496144"></a>token</h4> </div> </div> </div> <p> A pointer to a buffer containing a copy of a commit token previously generated at the replication group's master environment. Commit tokens are created using the <a class="xref" href="txnset_commit_token.html" title="DB_TXN->set_commit_token()">DB_TXN->set_commit_token()</a> method. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp62500800"></a>timeout</h4> </div> </div> </div> <p> Specifies the maximum time to wait for the transaction to arrive by replication, expressed in microseconds. To check the status of the transaction without waiting, provide a timeout value of 0. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp62480184"></a>Errors</h3> </div> </div> </div> <p> The <code class="methodname">DB_ENV->txn_applied()</code> <span> <span> method may fail and 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="idp62460400"></a>DB_KEYEMPTY</h4> </div> </div> </div> <p> The specified token was generated by a transaction that did not modify the database environment (for example, a read-only transaction). </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp62510008"></a> DB_LOCK_DEADLOCK</h4> </div> </div> </div> <p> While waiting for the result to be determined, the API became locked out due to replication role change and/or master/client synchronization. The application should abort in-flight transactions, pause briefly, and then retry. </p> </div> <div class="sect3" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h4 class="title"><a id="idp62510656"></a>EINVAL</h4> </div> </div> </div> <p> If the specified token was generated from a non-replicated database environment. </p> </div> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp62502960"></a>Class</h3> </div> </div> </div> <p> <a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a> </p> </div> <div class="sect2" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h3 class="title"><a id="idp62494344"></a>See Also</h3> </div> </div> </div> <p> <a class="xref" href="txn.html#txnlist" title="Transaction Subsystem and Related Methods">Transaction Subsystem and Related Methods</a>, <a class="xref" href="rep.html#replist" title="Replication and Related Methods">Replication 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="repmgrstat_print.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="rep.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="txnset_commit_token.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">DB_ENV->repmgr_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_TXN->set_commit_token()</td> </tr> </table> </div> </body> </html>