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<div class="subTitle">org.apache.ignite.cache</div>
<h2 title="Interface CacheEntry" class="title">Interface CacheEntry&lt;K,V&gt;</h2>
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<dt>All Superinterfaces:</dt>
<dd>javax.cache.Cache.Entry&lt;K,V&gt;</dd>
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<pre>public interface <span class="strong">CacheEntry&lt;K,V&gt;</span>
extends javax.cache.Cache.Entry&lt;K,V&gt;</pre>
<div class="block">Cache entry that extends <code>Cache.Entry</code> by providing additional entry related information.
<p>
To get an instance of <code>CacheEntry</code> from <code>Cache.Entry</code> use
<code>Cache.Entry.unwrap(Class)</code> method by passing <code>CacheEntry</code> class to it as the argument.
<p>
<code>CacheEntry</code> is supported only for <code>Cache.Entry</code> returned by one of the following methods:
<ul>
<li><code>Cache.invoke(Object, EntryProcessor, Object...)</code></li>
<li><code>Cache.invokeAll(Set, EntryProcessor, Object...)</code></li>
<li>invoke and invokeAll methods of <a href="../../../../org/apache/ignite/IgniteCache.html" title="interface in org.apache.ignite"><code>IgniteCache</code></a></li>
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<p>
To get an instance of <code>CacheEntry</code> directly use <a href="../../../../org/apache/ignite/IgniteCache.html#getEntry(K)"><code>IgniteCache.getEntry(Object)</code></a> or
<a href="../../../../org/apache/ignite/IgniteCache.html#getEntries(java.util.Set)"><code>IgniteCache.getEntries(Set)</code></a> methods.
<p>
<code>CacheEntry</code> is not supported for <code>Cache.iterator()</code> because of performance reasons.
<code>Cache.iterator()</code> loads entries from all the cluster nodes and to speed up the load additional
information, like entry's version, is ignored.
<h2 class="header">Java Example</h2>
<pre name="code" class="java">
IgniteCache<Integer, String> cache = grid(0).cache(null);
CacheEntry<String, Integer> entry1 = cache.invoke(100,
new EntryProcessor<Integer, String, CacheEntry<String, Integer>>() {
public CacheEntry<String, Integer> process(MutableEntry<Integer, String> entry,
Object... arguments) throws EntryProcessorException {
return entry.unwrap(CacheEntry.class);
}
});
// Cache entry for the given key may be updated at some point later.
CacheEntry<String, Integer> entry2 = cache.invoke(100,
new EntryProcessor<Integer, String, CacheEntry<String, Integer>>() {
public CacheEntry<String, Integer> process(MutableEntry<Integer, String> entry,
Object... arguments) throws EntryProcessorException {
return entry.unwrap(CacheEntry.class);
}
});
// Comparing entries' versions.
if (entry1.version().compareTo(entry2.version()) < 0) {
// the entry has been updated
}
</pre></div>
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<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/ignite/cache/CacheEntry.html#version()">version</a></strong>()</code>
<div class="block">Returns a comparable object representing the version of this cache entry.</div>
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<h3>Methods inherited from interface&nbsp;javax.cache.Cache.Entry</h3>
<code>getKey, getValue, unwrap</code></li>
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<h4>version</h4>
<pre><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&nbsp;version()</pre>
<div class="block">Returns a comparable object representing the version of this cache entry.
<p>
It is valid to compare cache entries' versions for the same key. In this case the latter update will be
represented by a higher version. The result of versions comparison of cache entries of different keys is
undefined.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Version of this cache entry.</dd></dl>
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<p class="legalCopy"><small><table width="100%" border="0" cellspacing=0 cellpadding=0 style="padding: 5px"> <tr> <td> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <a target=_blank href="https://ignite.apache.org"><nobr>2017 Copyright &#169; Apache Software Foundation</nobr></a> </td> </tr> </tbody> </table> </td> <td width="100%" align="right" valign="center"> <a href="https://twitter.com/ApacheIgnite" class="twitter-follow-button" data-show-count="false" data-size="large">Follow @ApacheIgnite</a> </td> </tr> <tr> <td colspan="2" valign="top" align="left"> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <b>Ignite Fabric</b> </td> <td>:&nbsp;&nbsp; ver. <strong>2.1.0</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>:&nbsp;&nbsp; July 20 2017 </td> </tr> </tbody> </table> </td> </tr> </table></small></p>
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