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<div class="subTitle">org.apache.hadoop.mapreduce.counters</div>
<h2 title="Class AbstractCounters" class="title">Class AbstractCounters&lt;C extends <a href="../../../../../org/apache/hadoop/mapreduce/Counter.html" title="interface in org.apache.hadoop.mapreduce">Counter</a>,G extends <a href="../../../../../org/apache/hadoop/mapreduce/counters/CounterGroupBase.html" title="interface in org.apache.hadoop.mapreduce.counters">CounterGroupBase</a>&lt;C&gt;&gt;</h2>
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<li>
<ul class="inheritance">
<li>org.apache.hadoop.mapreduce.counters.AbstractCounters&lt;C,G&gt;</li>
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<div class="description">
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<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>C</code> - type of counter inside the counters</dd>
<dd><code>G</code> - type of group inside the counters</dd>
</dl>
<dl>
<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;G&gt;, <a href="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</a></dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../org/apache/hadoop/mapreduce/Counters.html" title="class in org.apache.hadoop.mapreduce">Counters</a>, <a href="../../../../../org/apache/hadoop/mapred/Counters.html" title="class in org.apache.hadoop.mapred">Counters</a></dd>
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<pre>@InterfaceAudience.Public
@InterfaceStability.Stable
public abstract class <span class="typeNameLabel">AbstractCounters&lt;C extends <a href="../../../../../org/apache/hadoop/mapreduce/Counter.html" title="interface in org.apache.hadoop.mapreduce">Counter</a>,G extends <a href="../../../../../org/apache/hadoop/mapreduce/counters/CounterGroupBase.html" title="interface in org.apache.hadoop.mapreduce.counters">CounterGroupBase</a>&lt;C&gt;&gt;</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;G&gt;</pre>
<div class="block">An abstract class to provide common implementation for the Counters
container in both mapred and mapreduce packages.</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<td class="colFirst"><code>protected static org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#LOG">LOG</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/mapreduce/counters/AbstractCounters.html#AbstractCounters-org.apache.hadoop.mapreduce.counters.AbstractCounters-org.apache.hadoop.mapreduce.counters.CounterGroupFactory-">AbstractCounters</a></span>(<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="class in org.apache.hadoop.mapreduce.counters">AbstractCounters</a>&lt;C1,G1&gt;&nbsp;counters,
org.apache.hadoop.mapreduce.counters.CounterGroupFactory&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a>,<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a>&gt;&nbsp;groupFactory)</code>
<div class="block">Construct from another counters object.</div>
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<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#AbstractCounters-org.apache.hadoop.mapreduce.counters.CounterGroupFactory-">AbstractCounters</a></span>(org.apache.hadoop.mapreduce.counters.CounterGroupFactory&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a>,<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a>&gt;&nbsp;gf)</code>&nbsp;</td>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#countCounters--">countCounters</a></span>()</code>
<div class="block">Returns the total number of counters, by summing the number of counters
in each group.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#equals-java.lang.Object-">equals</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;genericRight)</code>&nbsp;</td>
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<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#findCounter-java.lang.Enum-">findCounter</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">Enum</a>&lt;?&gt;&nbsp;key)</code>
<div class="block">Find the counter for the given enum.</div>
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<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#findCounter-java.lang.String-java.lang.String-">findCounter</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;groupName,
<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;counterName)</code>
<div class="block">Find a counter, create one if necessary</div>
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<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#getGroup-java.lang.String-">getGroup</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;groupName)</code>
<div class="block">Returns the named counter group, or an empty group if there is none
with the specified name.</div>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</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;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#getGroupNames--">getGroupNames</a></span>()</code>
<div class="block">Returns the names of all counter classes.</div>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#hashCode--">hashCode</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#incrAllCounters-org.apache.hadoop.mapreduce.counters.AbstractCounters-">incrAllCounters</a></span>(<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="class in org.apache.hadoop.mapreduce.counters">AbstractCounters</a>&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a>,<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a>&gt;&nbsp;other)</code>
<div class="block">Increments multiple counters by their amounts in another Counters
instance.</div>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#iterator--">iterator</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#readFields-java.io.DataInput-">readFields</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</a>&nbsp;in)</code>
<div class="block">Deserialize the fields of this object from <code>in</code>.</div>
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<td class="colFirst"><code><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/mapreduce/counters/AbstractCounters.html#toString--">toString</a></span>()</code>
<div class="block">Return textual representation of the counter values.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html#write-java.io.DataOutput-">write</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</a>&nbsp;out)</code>
<div class="block">Write the set of groups.</div>
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<pre>protected static final&nbsp;org.slf4j.Logger LOG</pre>
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<pre>@InterfaceAudience.Private
public&nbsp;AbstractCounters(org.apache.hadoop.mapreduce.counters.CounterGroupFactory&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a>,<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a>&gt;&nbsp;gf)</pre>
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<pre>@InterfaceAudience.Private
public&nbsp;AbstractCounters(<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="class in org.apache.hadoop.mapreduce.counters">AbstractCounters</a>&lt;C1,G1&gt;&nbsp;counters,
org.apache.hadoop.mapreduce.counters.CounterGroupFactory&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a>,<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a>&gt;&nbsp;groupFactory)</pre>
<div class="block">Construct from another counters object.</div>
<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>C1</code> - type of the other counter</dd>
<dd><code>G1</code> - type of the other counter group</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>counters</code> - the counters object to copy</dd>
<dd><code>groupFactory</code> - the factory for new groups</dd>
</dl>
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<pre>public&nbsp;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a>&nbsp;findCounter(<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;groupName,
<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;counterName)</pre>
<div class="block">Find a counter, create one if necessary</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>groupName</code> - of the counter</dd>
<dd><code>counterName</code> - name of the counter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the matching counter</dd>
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<pre>public&nbsp;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a>&nbsp;findCounter(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">Enum</a>&lt;?&gt;&nbsp;key)</pre>
<div class="block">Find the counter for the given enum. The same enum will always return the
same counter.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - the counter key</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the matching counter object</dd>
</dl>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</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;&nbsp;getGroupNames()</pre>
<div class="block">Returns the names of all counter classes.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Set of counter names.</dd>
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<h4>iterator</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a>&gt;&nbsp;iterator()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#iterator--" title="class or interface in java.lang">iterator</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a> extends <a href="../../../../../org/apache/hadoop/mapreduce/counters/CounterGroupBase.html" title="interface in org.apache.hadoop.mapreduce.counters">CounterGroupBase</a>&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a>&gt;&gt;</code></dd>
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<pre>public&nbsp;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a>&nbsp;getGroup(<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;groupName)</pre>
<div class="block">Returns the named counter group, or an empty group if there is none
with the specified name.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>groupName</code> - name of the group</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the group</dd>
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<h4>countCounters</h4>
<pre>public&nbsp;int&nbsp;countCounters()</pre>
<div class="block">Returns the total number of counters, by summing the number of counters
in each group.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the total number of counters</dd>
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<pre>public&nbsp;void&nbsp;write(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</a>&nbsp;out)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Write the set of groups.
Counters ::= version #fgroups (groupId, group)* #groups (group)*</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/io/Writable.html#write-java.io.DataOutput-">write</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>out</code> - <code>DataOuput</code> to serialize this object into.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<pre>public&nbsp;void&nbsp;readFields(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</a>&nbsp;in)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/hadoop/io/Writable.html#readFields-java.io.DataInput-">Writable</a></code></span></div>
<div class="block">Deserialize the fields of this object from <code>in</code>.
<p>For efficiency, implementations should attempt to re-use storage in the
existing object where possible.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/io/Writable.html#readFields-java.io.DataInput-">readFields</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>in</code> - <code>DataInput</code> to deseriablize this object from.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<pre>public&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>&nbsp;toString()</pre>
<div class="block">Return textual representation of the counter values.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><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></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the string</dd>
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<pre>public&nbsp;void&nbsp;incrAllCounters(<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="class in org.apache.hadoop.mapreduce.counters">AbstractCounters</a>&lt;<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">C</a>,<a href="../../../../../org/apache/hadoop/mapreduce/counters/AbstractCounters.html" title="type parameter in AbstractCounters">G</a>&gt;&nbsp;other)</pre>
<div class="block">Increments multiple counters by their amounts in another Counters
instance.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>other</code> - the other Counters instance</dd>
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<pre>public&nbsp;boolean&nbsp;equals(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;genericRight)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><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></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></dd>
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<pre>public&nbsp;int&nbsp;hashCode()</pre>
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<dd><code><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></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></dd>
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