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apache / hadoop-site / 952d547359cafef280f0a0324055741b2ed55be1 / . / content / docs / r3.3.1 / hadoop-hdfs-httpfs / apidocs / org / apache / hadoop / lib / service / instrumentation / InstrumentationService.html
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<div class="subTitle">org.apache.hadoop.lib.service.instrumentation</div>
<h2 title="Class InstrumentationService" class="title">Class InstrumentationService</h2>
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<ul class="inheritance">
<li>org.apache.hadoop.lib.service.instrumentation.InstrumentationService</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../../org/apache/hadoop/lib/server/Service.html" title="interface in org.apache.hadoop.lib.server">Service</a>, <a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html" title="interface in org.apache.hadoop.lib.service">Instrumentation</a></dd>
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<pre>@InterfaceAudience.Private
public class <span class="typeNameLabel">InstrumentationService</span>
extends <a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html" title="class in org.apache.hadoop.lib.server">BaseService</a>
implements <a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html" title="interface in org.apache.hadoop.lib.service">Instrumentation</a></pre>
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<h3>Nested classes/interfaces inherited from interface&nbsp;org.apache.hadoop.lib.service.<a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html" title="interface in org.apache.hadoop.lib.service">Instrumentation</a></h3>
<code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.Variable.html" title="interface in org.apache.hadoop.lib.service">Instrumentation.Variable</a>&lt;<a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.Variable.html" title="type parameter in Instrumentation.Variable">T</a>&gt;</code></li>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#CONF_TIMERS_SIZE">CONF_TIMERS_SIZE</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#PREFIX">PREFIX</a></span></code>&nbsp;</td>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#InstrumentationService--">InstrumentationService</a></span>()</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#addCron-java.lang.String-java.lang.String-org.apache.hadoop.lib.service.Instrumentation.Cron-">addCron</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;group,
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<a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.Cron.html" title="interface in org.apache.hadoop.lib.service">Instrumentation.Cron</a>&nbsp;cron)</code>&nbsp;</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#addSampler-java.lang.String-java.lang.String-int-org.apache.hadoop.lib.service.Instrumentation.Variable-">addSampler</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;group,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
int&nbsp;samplingSize,
<a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.Variable.html" title="interface in org.apache.hadoop.lib.service">Instrumentation.Variable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>&gt;&nbsp;variable)</code>&nbsp;</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#addVariable-java.lang.String-java.lang.String-org.apache.hadoop.lib.service.Instrumentation.Variable-">addVariable</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;group,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
<a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.Variable.html" title="interface in org.apache.hadoop.lib.service">Instrumentation.Variable</a>&lt;?&gt;&nbsp;variable)</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>org.apache.hadoop.lib.service.instrumentation.InstrumentationService.Cron</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#createCron--">createCron</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#getInterface--">getInterface</a></span>()</code>
<div class="block">Returns the interface implemented by this service.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,?&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#getSnapshot--">getSnapshot</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#incr-java.lang.String-java.lang.String-long-">incr</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;group,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
long&nbsp;count)</code>&nbsp;</td>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#init--">init</a></span>()</code>
<div class="block">Initializes the server.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/lib/service/instrumentation/InstrumentationService.html#postInit--">postInit</a></span>()</code>
<div class="block">Post initializes the service.</div>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.lib.server.<a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html" title="class in org.apache.hadoop.lib.server">BaseService</a></h3>
<code><a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#destroy--">destroy</a>, <a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#getPrefix--">getPrefix</a>, <a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#getPrefixedName-java.lang.String-">getPrefixedName</a>, <a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#getServer--">getServer</a>, <a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#getServiceConfig--">getServiceConfig</a>, <a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#getServiceDependencies--">getServiceDependencies</a>, <a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#init-org.apache.hadoop.lib.server.Server-">init</a>, <a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#serverStatusChange-org.apache.hadoop.lib.server.Server.Status-org.apache.hadoop.lib.server.Server.Status-">serverStatusChange</a></code></li>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<pre>public static final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> PREFIX</pre>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../constant-values.html#org.apache.hadoop.lib.service.instrumentation.InstrumentationService.PREFIX">Constant Field Values</a></dd>
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<h4>CONF_TIMERS_SIZE</h4>
<pre>public static final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> CONF_TIMERS_SIZE</pre>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../constant-values.html#org.apache.hadoop.lib.service.instrumentation.InstrumentationService.CONF_TIMERS_SIZE">Constant Field Values</a></dd>
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<h3>Constructor Detail</h3>
<a name="InstrumentationService--">
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<h4>InstrumentationService</h4>
<pre>public&nbsp;InstrumentationService()</pre>
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<h4>init</h4>
<pre>public&nbsp;void&nbsp;init()
throws <a href="../../../../../../org/apache/hadoop/lib/server/ServiceException.html" title="class in org.apache.hadoop.lib.server">ServiceException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#init--">BaseService</a></code></span></div>
<div class="block">Initializes the server.
<p>
This method is called by <a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#init-org.apache.hadoop.lib.server.Server-"><code>BaseService.init(Server)</code></a> after all service properties
(properties prefixed with</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#init--">init</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html" title="class in org.apache.hadoop.lib.server">BaseService</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/server/ServiceException.html" title="class in org.apache.hadoop.lib.server">ServiceException</a></code> - thrown if the service could not be initialized.</dd>
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<h4>postInit</h4>
<pre>public&nbsp;void&nbsp;postInit()
throws <a href="../../../../../../org/apache/hadoop/lib/server/ServiceException.html" title="class in org.apache.hadoop.lib.server">ServiceException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#postInit--">BaseService</a></code></span></div>
<div class="block">Post initializes the service. This method is called by the
<a href="../../../../../../org/apache/hadoop/lib/server/Server.html" title="class in org.apache.hadoop.lib.server"><code>Server</code></a> after all services of the server have been initialized.
<p>
This method does a NOP.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/server/Service.html#postInit--">postInit</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/server/Service.html" title="interface in org.apache.hadoop.lib.server">Service</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html#postInit--">postInit</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/server/BaseService.html" title="class in org.apache.hadoop.lib.server">BaseService</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/server/ServiceException.html" title="class in org.apache.hadoop.lib.server">ServiceException</a></code> - thrown if the service could not be
post-initialized.</dd>
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<h4>getInterface</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&nbsp;getInterface()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/server/Service.html#getInterface--">Service</a></code></span></div>
<div class="block">Returns the interface implemented by this service. This interface is used
the <a href="../../../../../../org/apache/hadoop/lib/server/Server.html" title="class in org.apache.hadoop.lib.server"><code>Server</code></a> when the <a href="../../../../../../org/apache/hadoop/lib/server/Server.html#get-java.lang.Class-"><code>Server.get(Class)</code></a> method is used to
retrieve a service.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/server/Service.html#getInterface--">getInterface</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/server/Service.html" title="interface in org.apache.hadoop.lib.server">Service</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the interface that identifies the service.</dd>
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<h4>createCron</h4>
<pre>public&nbsp;org.apache.hadoop.lib.service.instrumentation.InstrumentationService.Cron&nbsp;createCron()</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html#createCron--">createCron</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html" title="interface in org.apache.hadoop.lib.service">Instrumentation</a></code></dd>
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<h4>incr</h4>
<pre>public&nbsp;void&nbsp;incr(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;group,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
long&nbsp;count)</pre>
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<dd><code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html#incr-java.lang.String-java.lang.String-long-">incr</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html" title="interface in org.apache.hadoop.lib.service">Instrumentation</a></code></dd>
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<h4>addCron</h4>
<pre>public&nbsp;void&nbsp;addCron(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;group,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
<a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.Cron.html" title="interface in org.apache.hadoop.lib.service">Instrumentation.Cron</a>&nbsp;cron)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html#addCron-java.lang.String-java.lang.String-org.apache.hadoop.lib.service.Instrumentation.Cron-">addCron</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html" title="interface in org.apache.hadoop.lib.service">Instrumentation</a></code></dd>
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<h4>addVariable</h4>
<pre>public&nbsp;void&nbsp;addVariable(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;group,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
<a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.Variable.html" title="interface in org.apache.hadoop.lib.service">Instrumentation.Variable</a>&lt;?&gt;&nbsp;variable)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html#addVariable-java.lang.String-java.lang.String-org.apache.hadoop.lib.service.Instrumentation.Variable-">addVariable</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html" title="interface in org.apache.hadoop.lib.service">Instrumentation</a></code></dd>
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<h4>addSampler</h4>
<pre>public&nbsp;void&nbsp;addSampler(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;group,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
int&nbsp;samplingSize,
<a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.Variable.html" title="interface in org.apache.hadoop.lib.service">Instrumentation.Variable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>&gt;&nbsp;variable)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html#addSampler-java.lang.String-java.lang.String-int-org.apache.hadoop.lib.service.Instrumentation.Variable-">addSampler</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html" title="interface in org.apache.hadoop.lib.service">Instrumentation</a></code></dd>
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<h4>getSnapshot</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,?&gt;&gt;&nbsp;getSnapshot()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html#getSnapshot--">getSnapshot</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/hadoop/lib/service/Instrumentation.html" title="interface in org.apache.hadoop.lib.service">Instrumentation</a></code></dd>
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