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| <h2 title="Interface IgniteReducer" class="title">Interface IgniteReducer<E,R></h2> |
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| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>E</code> - Type of collected values.</dd><dd><code>R</code> - Type of reduced value.</dd></dl> |
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| <dt>All Superinterfaces:</dt> |
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| <pre>public interface <span class="strong">IgniteReducer<E,R></span> |
| extends <a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre> |
| <div class="block">Defines generic reducer that collects multiple values and reduces them into one. |
| Reducers are useful in computations when results from multiple remote jobs need |
| to be reduced into one, e.g. <a href="../../../../org/apache/ignite/IgniteCompute.html#call(java.util.Collection,%20org.apache.ignite.lang.IgniteReducer)"><code>IgniteCompute.call(Collection, IgniteReducer)</code></a> method.</div> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/lang/IgniteReducer.html#collect(E)">collect</a></strong>(<a href="../../../../org/apache/ignite/lang/IgniteReducer.html" title="type parameter in IgniteReducer">E</a> e)</code> |
| <div class="block">Collects given value.</div> |
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| <td class="colFirst"><code><a href="../../../../org/apache/ignite/lang/IgniteReducer.html" title="type parameter in IgniteReducer">R</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/lang/IgniteReducer.html#reduce()">reduce</a></strong>()</code> |
| <div class="block">Reduces collected values into one.</div> |
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| <h4>collect</h4> |
| <pre>boolean collect(@Nullable |
| <a href="../../../../org/apache/ignite/lang/IgniteReducer.html" title="type parameter in IgniteReducer">E</a> e)</pre> |
| <div class="block">Collects given value. If this method returns <code>false</code> then <a href="../../../../org/apache/ignite/lang/IgniteReducer.html#reduce()"><code>reduce()</code></a> |
| will be called right away. Otherwise caller will continue collecting until all |
| values are processed.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>e</code> - Value to collect.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>true</code> to continue collecting, <code>false</code> to instruct caller to stop |
| collecting and call <a href="../../../../org/apache/ignite/lang/IgniteReducer.html#reduce()"><code>reduce()</code></a> method.</dd></dl> |
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| <h4>reduce</h4> |
| <pre><a href="../../../../org/apache/ignite/lang/IgniteReducer.html" title="type parameter in IgniteReducer">R</a> reduce()</pre> |
| <div class="block">Reduces collected values into one.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Reduced value.</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>2015 Copyright © 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> <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script> </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>: ver. <strong>1.6.0</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>: May 18 2016 </td> </tr> </tbody> </table> </td> </tr> </table></small></p> |
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