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| <b>Release 2.5</b><br /></font></td> |
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| <div class="ind"><!-- End Header --><a id="profiler" name="profiler"></a><a id="TLJPA1125" name="TLJPA1125"></a> |
| <hr /> |
| <div class="refsect1"> |
| <h2 class="refsect1"><font face="arial, helvetica, sans-serif" color="#330099">profiler</font></h2> |
| <p>Use <code>eclipselink.profiler</code> to specify which performance profiler to use in order to capture runtime statistics.</p> |
| <a id="sthref1192" name="sthref1192"></a> |
| <p><strong><br /><span class="refsubsect">Values</span></strong></p> |
| <p><a href="#CHDBECBD">Table 5-83</a> describes this persistence property's values.</p> |
| <div class="tblhruleformalwide"><a id="TLJPA1126" name="TLJPA1126"></a><a id="sthref1193" name="sthref1193"></a><a id="CHDBECBD" name="CHDBECBD"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Table 5-83 Valid Values for profiler</font></em></strong></p> |
| <table class="HRuleFormalWide" title="Valid Values for profiler" summary="Valid Values for this query hint" dir="ltr" border="1" width="100%" frame="hsides" rules="rows" cellpadding="3" cellspacing="0"> |
| <col width="26%" /> |
| <col width="*" /> |
| <thead> |
| <tr align="left" valign="top"> |
| <th align="left" valign="bottom" id="r1c1-t90"><font face="Arial, Helvetica, sans-serif"><strong>Value</strong></font></th> |
| <th align="left" valign="bottom" id="r1c2-t90"><font face="Arial, Helvetica, sans-serif"><strong>Description</strong></font></th> |
| </tr> |
| </thead> |
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| <td align="left" id="r2c1-t90" headers="r1c1-t90"> |
| <p><code>NoProfiler</code></p> |
| </td> |
| <td align="left" headers="r2c1-t90 r1c2-t90"> |
| <p>Do not use a performance profiler.</p> |
| </td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t90" headers="r1c1-t90"> |
| <p><code>PerformanceProfiler</code></p> |
| </td> |
| <td align="left" headers="r3c1-t90 r1c2-t90"> |
| <p>Use EclipseLink performance profiler (<code>org.eclipse.persistence.tools.profiler.PerformanceProfiler</code> class).</p> |
| </td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r4c1-t90" headers="r1c1-t90"> |
| <p><code>QueryMonitor</code></p> |
| </td> |
| <td align="left" headers="r4c1-t90 r1c2-t90"> |
| <p>Monitor query executions and cache hits (<code>org.eclipse.persistence.tools.profiler.QueryMonitor</code> class).</p> |
| <p>This option provides a simple low-overhead means for measuring performance of query executions and cache hits. You may want to use this option for performance analysis in a complex system.</p> |
| </td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r5c1-t90" headers="r1c1-t90"> |
| <p>Custom profiler</p> |
| </td> |
| <td align="left" headers="r5c1-t90 r1c2-t90"> |
| <p>Specify a custom profiler class name which implements <code>SessionProfiler</code> and provides a no-argument constructor.</p> |
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| <!-- class="tblhruleformalwide" --> |
| <a id="sthref1194" name="sthref1194"></a> |
| <p><strong><br /><span class="refsubsect">Usage</span></strong></p> |
| <a id="sthref1195" name="sthref1195"></a> |
| <p><strong><br /><span class="refsubsect">Examples</span></strong></p> |
| <p><a href="#CHDBCCED">Example 5-81</a> shows how to use this property in the <code>persistence.xml</code> file.</p> |
| <div class="example"><a id="CHDBCCED" name="CHDBCCED"></a><a id="TLJPA1013" name="TLJPA1013"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 5-81 Using profiler in persistence.xml</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| <property name="eclipselink.profiler" value="PerformanceProfiler"/> |
| </pre></div> |
| <!-- class="example" --> |
| <p><a href="#CHDJFBDI">Example 5-82</a> shows how to use this property in a property map.</p> |
| <div class="example"><a id="CHDJFBDI" name="CHDJFBDI"></a><a id="TLJPA1014" name="TLJPA1014"></a> |
| <p><strong><em><font face="arial, helvetica, sans-serif">Example 5-82 Using profiler in Property Map</font></em></strong></p> |
| <pre xml:space="preserve" class="oac_no_warn"> |
| import org.eclipse.persistence.config.ProfilerType;import org.eclipse.persistence.config.PersistenceUnitProperties; |
| propertiesMap.put(PersistenceUnitProperties.PROFILER, ProfilerType.PerformanceProfiler); |
| </pre></div> |
| <!-- class="example" --> |
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| <p><strong><br /><span class="refsubsect">See Also</span></strong></p> |
| <p>For more information, see:</p> |
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