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<pre>public interface <span class="typeNameLabel">CounterSet</span></pre>
<div class="block">A counter refers to a value which can only increase.
Usually the value is reset when the process starts.
A CounterSet is a set of <a href="../../../../org/apache/zookeeper/metrics/Counter.html" title="interface in org.apache.zookeeper.metrics"><code>Counter</code></a> grouped by keys.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/zookeeper/metrics/CounterSet.html#add-java.lang.String-long-">add</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> key,
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<td class="colFirst"><code>default void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/zookeeper/metrics/CounterSet.html#inc-java.lang.String-">inc</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> key)</code>
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<pre>default void inc(<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> key)</pre>
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<pre>void add(<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> key,
long delta)</pre>
<div class="block">Increment the value by a given amount for the given key
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