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| <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">D.2. Statistic Report Patterns</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-Appendix-Statistics-Reporting.html">Prev</a> </td><th align="center" width="60%">Appendix D. Statistics Reporting</th><td align="right" width="20%"> <a accesskey="n" href="apds03.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="d0e9639"></a>D.2. Statistic Report Patterns</h2></div></div></div><p>The statistic report pattern defines the format of a statistic report written to the log.</p><p>Statistic report patterns are defined by <a class="link" href="Java-Broker-Management-Managing-Entities.html#Java-Broker-Management-Managing-Entities-General" title="7.1. General Description"> |
| content variables</a>. The place where the context variable is defined governs the scope i.e. the entities to |
| which the pattern will be applied.</p><p>For instance, to define a statistics reporting pattern for a single queue, |
| <a class="link" href="Java-Broker-Management-Channel-Web-Console.html#Java-Broker-Management-Channel-Web-Console-Managing-Context-Variables" title="6.2.3.4. Context Variables">set the contextvariable |
| </a> on the queue itself. If you want the same statistics report pattern for apply to all queues, set the pattern on a |
| suitable ancestor of the queue. For instance, if set on virtualhost, the pattern will applied to all queues defined |
| on that virtualhost. If set on Broker, the pattern will be applied to all queues on the Broker.</p><p>The context variable name is formed as follows: |
| <code class="literal">qpid.<category-name>.statisticsReportPattern</code>.</p><p>For instance, for queue: <code class="literal">qpid.queue.statisticsReportPattern</code> and virtualhost: |
| <code class="literal">qpid.virtualhost.statisticsReportPattern</code></p><p>The value of the context variable is a free text string containing reference(s) to the statistic names that |
| are to appear in the report. References are made by surrounding the name of the statistic with '$' and curly braces, |
| thus <code class="literal">${<statistic-name>}</code>.</p><p>Statistics references allow an optional formatters. The supported formatters are: <code class="literal">:byteunit</code> |
| (produces a human readable byte value e.g. 3 MiB), <code class="literal">:duration</code> (produces a ISO-8601 duration)and |
| <code class="literal">:datetime</code> (produces a ISO-8601 date/time).</p><p>For example, a statistic report pattern for the <code class="literal">queue</code> category specifying two queue |
| statistic values: <code class="literal">queueDepthMessages=${queueDepthMessages},queueDepthBytes=${queueDepthBytes:byteunit}</code></p><p>Like all context variables, the statistic report pattern can also reference the attributes of the entity |
| or even its ancestors. This feature can be exploited to include things like the name of the entity within the |
| report.</p><p>These points are illustrated in the examples in the next section.</p><p>A catalogue of statistics names and descriptions is available from the REST API documentation available |
| through the <a class="link" href="Java-Broker-Management-Channel-Web-Console.html" title="6.2. Web Management Console">Web Management Console</a>.</p></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-Appendix-Statistics-Reporting.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="Java-Broker-Appendix-Statistics-Reporting.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="apds03.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">Appendix D. Statistics Reporting </td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="right" valign="top" width="40%"> D.3. Examples</td></tr></table></div></div> |
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