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<h2 title="Class ExpiryQueue" class="title">Class ExpiryQueue<E></h2>
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<pre>public class <span class="typeNameLabel">ExpiryQueue<E></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></pre>
<div class="block">ExpiryQueue tracks elements in time sorted fixed duration buckets.
It's used by SessionTrackerImpl to expire sessions and NIOServerCnxnFactory
to expire connections.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/zookeeper/server/ExpiryQueue.html#ExpiryQueue-int-">ExpiryQueue</a></span>(int expirationInterval)</code> </td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/zookeeper/server/ExpiryQueue.html#dump-java.io.PrintWriter-">dump</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintWriter.html?is-external=true" title="class or interface in java.io">PrintWriter</a> pwriter)</code> </td>
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<div class="block">Returns an unmodifiable view of the expiration time -> elements mapping.</div>
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<div class="block">Removes element from the queue.</div>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/zookeeper/server/ExpiryQueue.html#update-E-int-">update</a></span>(<a href="../../../../org/apache/zookeeper/server/ExpiryQueue.html" title="type parameter in ExpiryQueue">E</a> elem,
int timeout)</code>
<div class="block">Adds or updates expiration time for element in queue, rounding the
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<pre>public ExpiryQueue(int expirationInterval)</pre>
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<pre>public <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> remove(<a href="../../../../org/apache/zookeeper/server/ExpiryQueue.html" title="type parameter in ExpiryQueue">E</a> elem)</pre>
<div class="block">Removes element from the queue.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>elem</code> - element to remove</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>time at which the element was set to expire, or null if
it wasn't present</dd>
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<pre>public <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> update(<a href="../../../../org/apache/zookeeper/server/ExpiryQueue.html" title="type parameter in ExpiryQueue">E</a> elem,
int timeout)</pre>
<div class="block">Adds or updates expiration time for element in queue, rounding the
timeout to the expiry interval bucketed used by this queue.</div>
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<dd><code>elem</code> - element to add/update</dd>
<dd><code>timeout</code> - timout in milliseconds</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>time at which the element is now set to expire if
changed, or null if unchanged</dd>
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<pre>public long getWaitTime()</pre>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>milliseconds until next expiration time, or 0 if has already past</dd>
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<pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="../../../../org/apache/zookeeper/server/ExpiryQueue.html" title="type parameter in ExpiryQueue">E</a>> poll()</pre>
<div class="block">Remove the next expired set of elements from expireMap. This method needs
to be called frequently enough by checking getWaitTime(), otherwise there
will be a backlog of empty sets queued up in expiryMap.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
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ready</dd>
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<pre>public void dump(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintWriter.html?is-external=true" title="class or interface in java.io">PrintWriter</a> pwriter)</pre>
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<pre>public <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><<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>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a><<a href="../../../../org/apache/zookeeper/server/ExpiryQueue.html" title="type parameter in ExpiryQueue">E</a>>> getExpiryMap()</pre>
<div class="block">Returns an unmodifiable view of the expiration time -> elements mapping.</div>
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