222 lines
6.7 KiB
HTML
222 lines
6.7 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>Log Transaction (QYPELOGT, qypeLogTransaction) API</title>
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<!-- Begin Header Records ========================================== -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!-- Created for V5R2 -->
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<!-- End Header Records -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<a name="Top_Of_Page"></a>
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<!-- Java sync-link -->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<h2>Log Transaction (QYPELOGT, qypeLogTransaction) API</h2>
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<div class="box" style="width: 80%;">
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<br>
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Required Parameter Group:<br>
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<!-- iddvc RMBR -->
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<br>
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<table width="100%">
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<tr>
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<td align="center" valign="top" width="10%">1</td>
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<td align="left" valign="top" width="45%">Application identifier</td>
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<td align="left" valign="top" width="15%">Input</td>
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<td align="left" valign="top" width="30%">Char(20)</td>
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</tr>
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<tr>
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<td align="center" valign="top">2</td>
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<td align="left" valign="top">Transaction identifier</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Binary(4) Unsigned</td>
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</tr>
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<tr>
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<td align="center" valign="top">3</td>
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<td align="left" valign="top">Application trace data</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Char(*)</td>
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</tr>
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<tr>
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<td align="center" valign="top">4</td>
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<td align="left" valign="top">Length of application trace data</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Binary(4) Unsigned</td>
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</tr>
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<tr>
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<td align="center" valign="top">5</td>
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<td align="left" valign="top">Error code</td>
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<td align="left" valign="top">I/O</td>
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<td align="left" valign="top">Char(*)</td>
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</tr>
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</table>
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<br>
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Service Program Name: QYPESVPG<br>
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<!-- iddvc RMBR -->
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<br>
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Default Public Authority: *USE<br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: Yes<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The Log Transaction (OPM, QYPELOGT; ILE, qypeLogTransaction) API is used
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together with the <a href="qypestrt.htm">Start Transaction</a> (QYPESTRT,
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qypeStartTransaction) API and the <a href="qypeendt.htm">End Transaction</a>
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(QYPEENDT, qypeEndTransaction) API to collect performance data for user-defined
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transactions. The Log Transaction API is called by an application any time
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between the calls to the Start Transaction API and the End Transaction API to
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trace the progress of a user-defined transaction.</p>
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<p>This API can be used to provide trace type of performance data - collected
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by Performance Explorer (PEX). Collection Services ignores this API.</p>
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<p>If the Performance Explorer (PEX) is running, this API generates a log
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transaction trace record. In addition to the data supplied by the application
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in the application trace data parameter, PEX will capture the current values of
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performance counters associated with the current thread such as CPU time used,
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I/O activity and seize/lock activity. After the End Performance Explorer
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(ENDPEX) command is run, the application-supplied data
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for this record is written to the QMUDTA field in the QAYPEMIUSR file. The performance counters are written to individual fields in the QAYPEMIUSR and QAYPETIDX files.</p>
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<p>See <a href="qypestrt.htm#USAGENOTES">Usage Notes</a> for the Start
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Transaction (QYPESTRT, qypeStartTransaction) API for more information.</p>
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<br>
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<h3>Authorities and Locks</h3>
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<dl>
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<dt><em>API Public Authority</em></dt>
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<dd>*USE</dd>
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</dl>
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<br>
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<h3>Required Parameter Group</h3>
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<dl>
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<dt><strong>Application identifier</strong></dt>
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<dd>INPUT; CHAR(20)
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<p>The name of the application. Given that many applications could use this
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API, the name should be chosen so that it is unique. Application identifiers
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starting with "QIBM_Qccc_", where ccc is a component identifier, are reserved
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for IBM use.</p>
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</dd>
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<dt><strong>Transaction identifier</strong></dt>
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<dd>INPUT; BINARY(4) UNSIGNED
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<p>Any sort of unique transaction identifier, such as a sequential number. In
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order to collect meaningful data, the identifier passed to the Log Transaction
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API should be the same as the identifier used in the call to the Start
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Transaction API for the same transaction.</p>
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</dd>
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<dt><strong>Application trace data</strong></dt>
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<dd>INPUT; CHAR(*)
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<p>Application-defined trace data to be saved by PEX. This can be any data that
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the user wants to associate with this transaction - for example, the user ID of
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the client performing the transaction, the name of the file being updated by
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the transaction, or the account ID being accessed by the transaction. The data
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can be up to 3032 bytes long. This data is reported by PEX in the QAYPEMIUSR
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file.</p>
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</dd>
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<dt><strong>Length of application trace data</strong></dt>
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<dd>INPUT; BINARY(4) UNSIGNED
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<p>The length (in bytes) of application-defined trace data to be saved by PEX.
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The value must be between 0 and 3032.</p>
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</dd>
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<dt><strong>Error code</strong></dt>
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<dd>I/O; CHAR(*)
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<p>The structure in which to return error information. For the format of the
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structure, see <a href="../apiref/error.htm#hdrerrcod">Error Code Parameter</a>.</p>
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</dd>
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</dl>
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<br>
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<h3>Usage Notes</h3>
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<p>For the description of how Performance Explorer (PEX) saves and reports
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performance data for this API, see <a href="qypestrt.htm#USAGENOTES">Usage
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Notes</a> for the Start Transaction API.</p>
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<br>
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<h3>Error Messages</h3>
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<table cellpadding="5">
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<!-- cols="15 85" -->
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<tr>
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<th align="left" valign="top" nowrap>Message ID</th>
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<th align="left" valign="top">Error Message Text</th>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3C36 E</td>
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<td align="left" valign="top">Number of parameters, &1, entered
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for this API was not valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3C3C E</td>
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<td align="left" valign="top">Value for parameter &1 is not valid.</td>
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</tr>
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</table>
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<br>
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<hr>
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API introduced: V5R2
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center"><a href="qypscsca.htm">Top</a> | <a href=
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"perfmgmt.htm">Performance Management APIs</a> | <a href="aplist.htm">APIs by
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category</a></td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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