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     <h1>EJB Request Logging

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 <p>Both client-side and server-side request logging is supported and includes various invocation times aimed at helping to identify where time
 is going in a request.</p>

 <h2>Client-side</h2>

 <p>On the client requests/responses are logged on java.util.logging <code>FINEST</code> level in category <code>OpenEJB.client</code>.  The code is similar to the following:</p>

 <pre><code>final long time = System.nanoTime() - start;
 final String message = String.format("Invocation %sns - %s - Request(%s) - Response(%s)", time, conn.getURI(), req, res);
 logger.log(Level.FINEST, message);
 </code></pre>

 <p>Note that the check to see if FINEST is enabled is cached for performance reasons, so it must be set at VM startup.</p>

 <h2>Server-side</h2>

 <p>On the server requests/responses are logged in java.util.logging <code>FINE</code> in category<code>"OpenEJB.server.remote.ejb</code>.  The code for that
 is similar to this:</p>

 <pre><code>logger.fine("EJB REQUEST: " + req + " -- RESPONSE: " + res);
 </code></pre>

 <h2>Request times</h2>

 <p>Three times are tracked per request and logged in the above statements as part of the formatting of the EJB Response.  They're best understood in reverse:</p>

 <ul>
 <li><strong>Container time</strong> -- this is the raw time of invoking the bean including its
 interceptors and any transaction begin/commit time.  This time is effectively "business logic".</li>
 <li><strong>Server time</strong> -- this timer starts the (nano)second the request is seen by the server and
 the (nano)second the response is actually written.  The serverTime minus the containerTime will
 effectively show you how long serialization and deserialization is taking pre request.</li>
 <li><strong>Client time</strong> -- entire begin to end including attempting to contact the server and fully reading the response.  The clientTime minus the serverTime will show network latency for the most part.</li>
 </ul>

 <p>The container time and server time are written in the EJB response and visible to the client.  The client will log all three times, the server will log the first two.  All log statements are on a single line.</p>

 <h2>Bean-time and JMX Statistics</h2>

 <p>The above information applies purely to remote EJB calls made over a network.  Calls on <code>@Remote</code> or <code>@Local</code> interfaces between two components in the same server are not logged.</p>

 <p>However, <strong>all</strong> EJB invocations to business methods <em>or</em> callbacks like <code>@PostConstruct</code> are tracked for statistical analysis.
 By default a floating window of 2000 samples are kept.  The time tracked is purely <strong>bean time</strong> which includes
 interceptors, decorators and the bean itself, but does not include other container services like transactions or security.  </p>

 <p>This information is available in JMX.  A sample JMX ObjectName for a <code>CounterBean</code> will look like this:</p>

 <pre><code>openejb.management:J2EEServer=openejb,J2EEApplication=null,EJBModule=StatsModule,StatelessSessionBean=CounterBean,j2eeType=Invocations,name=CounterBean
 </code></pre>

 <p>All beans have the following MBean attributes, listed here in shorthand:</p>

 <ul>
 <li>javax.management.MBeanAttributeInfo[description=, name=InvocationCount, type=long, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=InvocationTime, type=long, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=MonitoredMethods, type=long, read-only, descriptor={}]</li>
 <li>javax.management.MBeanOperationInfo[description=, name=FilterAttributes, returnType=void, signature=[javax.management.MBeanParameterInfo[description="", name=excludeRegex, type=java.lang.String, descriptor={}], javax.management.MBeanParameterInfo[description="", name=includeRegex, type=java.lang.String, descriptor={}]], impact=unknown, descriptor={}]</li>
 </ul>

 <p>Then for every method there will be these attributes and operations:</p>

 <ul>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Count, type=long, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().GeometricMean, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Kurtosis, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Max, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Mean, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Min, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile01, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile10, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile25, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile50, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile75, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile90, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile99, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().SampleSize, type=int, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Skewness, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().StandardDeviation, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Sum, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Sumsq, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Variance, type=double, read-only, descriptor={}]</li>
 <li>javax.management.MBeanOperationInfo[description=, name=someMethod().setSampleSize, returnType=void, signature=[javax.management.MBeanParameterInfo[description=, name=p1, type=int, descriptor={}]], impact=unknown, descriptor={}]</li>
 <li>javax.management.MBeanOperationInfo[description=, name=someMethod().sortedValues, returnType=[D, signature=[], impact=unknown, descriptor={}]</li>
 <li>javax.management.MBeanOperationInfo[description=, name=someMethod().values, returnType=[D, signature=[], impact=unknown, descriptor={}]</li>
 </ul>


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	<h1>EJB Request Logging

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	<p>Both client-side and server-side request logging is supported and includes various invocation times aimed at helping to identify where time
	is going in a request.</p>

	<h2>Client-side</h2>

	<p>On the client requests/responses are logged on java.util.logging <code>FINEST</code> level in category <code>OpenEJB.client</code>. The code is similar to the following:</p>

	<pre><code>final long time = System.nanoTime() - start;
	final String message = String.format("Invocation %sns - %s - Request(%s) - Response(%s)", time, conn.getURI(), req, res);
	logger.log(Level.FINEST, message);
	</code></pre>

	<p>Note that the check to see if FINEST is enabled is cached for performance reasons, so it must be set at VM startup.</p>

	<h2>Server-side</h2>

	<p>On the server requests/responses are logged in java.util.logging <code>FINE</code> in category<code>"OpenEJB.server.remote.ejb</code>. The code for that
	is similar to this:</p>

	<pre><code>logger.fine("EJB REQUEST: " + req + " -- RESPONSE: " + res);
	</code></pre>

	<h2>Request times</h2>

	<p>Three times are tracked per request and logged in the above statements as part of the formatting of the EJB Response. They're best understood in reverse:</p>

	<ul>
	<li><strong>Container time</strong> -- this is the raw time of invoking the bean including its
	interceptors and any transaction begin/commit time. This time is effectively "business logic".</li>
	<li><strong>Server time</strong> -- this timer starts the (nano)second the request is seen by the server and
	the (nano)second the response is actually written. The serverTime minus the containerTime will
	effectively show you how long serialization and deserialization is taking pre request.</li>
	<li><strong>Client time</strong> -- entire begin to end including attempting to contact the server and fully reading the response. The clientTime minus the serverTime will show network latency for the most part.</li>
	</ul>

	<p>The container time and server time are written in the EJB response and visible to the client. The client will log all three times, the server will log the first two. All log statements are on a single line.</p>

	<h2>Bean-time and JMX Statistics</h2>

	<p>The above information applies purely to remote EJB calls made over a network. Calls on <code>@Remote</code> or <code>@Local</code> interfaces between two components in the same server are not logged.</p>

	<p>However, <strong>all</strong> EJB invocations to business methods <em>or</em> callbacks like <code>@PostConstruct</code> are tracked for statistical analysis.
	By default a floating window of 2000 samples are kept. The time tracked is purely <strong>bean time</strong> which includes
	interceptors, decorators and the bean itself, but does not include other container services like transactions or security. </p>

	<p>This information is available in JMX. A sample JMX ObjectName for a <code>CounterBean</code> will look like this:</p>

	<pre><code>openejb.management:J2EEServer=openejb,J2EEApplication=null,EJBModule=StatsModule,StatelessSessionBean=CounterBean,j2eeType=Invocations,name=CounterBean
	</code></pre>

	<p>All beans have the following MBean attributes, listed here in shorthand:</p>

	<ul>
	<li>javax.management.MBeanAttributeInfo[description=, name=InvocationCount, type=long, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=InvocationTime, type=long, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=MonitoredMethods, type=long, read-only, descriptor={}]</li>
	<li>javax.management.MBeanOperationInfo[description=, name=FilterAttributes, returnType=void, signature=[javax.management.MBeanParameterInfo[description="", name=excludeRegex, type=java.lang.String, descriptor={}], javax.management.MBeanParameterInfo[description="", name=includeRegex, type=java.lang.String, descriptor={}]], impact=unknown, descriptor={}]</li>
	</ul>

	<p>Then for every method there will be these attributes and operations:</p>

	<ul>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Count, type=long, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().GeometricMean, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Kurtosis, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Max, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Mean, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Min, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile01, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile10, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile25, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile50, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile75, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile90, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Percentile99, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().SampleSize, type=int, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Skewness, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().StandardDeviation, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Sum, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Sumsq, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanAttributeInfo[description=, name=someMethod().Variance, type=double, read-only, descriptor={}]</li>
	<li>javax.management.MBeanOperationInfo[description=, name=someMethod().setSampleSize, returnType=void, signature=[javax.management.MBeanParameterInfo[description=, name=p1, type=int, descriptor={}]], impact=unknown, descriptor={}]</li>
	<li>javax.management.MBeanOperationInfo[description=, name=someMethod().sortedValues, returnType=[D, signature=[], impact=unknown, descriptor={}]</li>
	<li>javax.management.MBeanOperationInfo[description=, name=someMethod().values, returnType=[D, signature=[], impact=unknown, descriptor={}]</li>
	</ul>




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