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| <div class="subTitle">org.apache.geode.cache</div> |
| <h2 title="Interface FixedPartitionResolver" class="title">Interface FixedPartitionResolver<K,V></h2> |
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| <pre>public interface <span class="typeNameLabel">FixedPartitionResolver<K,V></span> |
| extends <a href="../../../../org/apache/geode/cache/PartitionResolver.html" title="interface in org.apache.geode.cache">PartitionResolver</a><K,V></pre> |
| <div class="block">Implementers of interface <code>FixedPartitionResolver</code> helps to achieve explicit mapping |
| of a "user defined" partition to a data member node. |
| <p> |
| GemFire uses the partition name returned by |
| <a href="../../../../org/apache/geode/cache/FixedPartitionResolver.html#getPartitionName-org.apache.geode.cache.EntryOperation-java.util.Set-"><code>getPartitionName(EntryOperation, Set)</code></a> to determine on which member |
| the data is being managed. Say, for example, you want to partition all Trades according to |
| quarters. You can implement FixedPartitionResolver to get the name of the quarter based on the |
| date given as part of <a href="../../../../org/apache/geode/cache/EntryOperation.html" title="interface in org.apache.geode.cache"><code>EntryOperation</code></a>. |
| <p> |
| |
| public class QuarterPartitionResolver implements FixedPartitionResolver{<br> |
| public String getPartitionName(EntryOperation opDetails, Set |
| allAvailablePartitions) |
| {<br> |
| Date date = sdf.parse((String)opDetails.getKey());<br> |
| Calendar cal = Calendar.getInstance();<br> |
| cal.setTime(date);<br> |
| int month = cal.get(Calendar.MONTH);<br> |
| if (month == 0 || month == 1 || month == 2) {<br> |
| return "Quarter1";<br> |
| }<br> |
| else if (month == 3 || month == 4 || month == 5) {<br> |
| return "Quarter2";<br> |
| }<br> |
| else if (month == 6 || month == 7 || month == 8) {<br> |
| return "Quarter3";<br> |
| }<br> |
| else if (month == 9 || month == 10 || month == 11) {<br> |
| return "Quarter4";<br> |
| }<br> |
| else {<br> |
| return "Invalid Quarter";<br> |
| }<br> |
| }<br></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>GemFire 6.6</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/geode/cache/PartitionResolver.html" title="interface in org.apache.geode.cache"><code>PartitionResolver</code></a></dd> |
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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/geode/cache/FixedPartitionResolver.html#getPartitionName-org.apache.geode.cache.EntryOperation-java.util.Set-">getPartitionName</a></span>(<a href="../../../../org/apache/geode/cache/EntryOperation.html" title="interface in org.apache.geode.cache">EntryOperation</a><<a href="../../../../org/apache/geode/cache/FixedPartitionResolver.html" title="type parameter in FixedPartitionResolver">K</a>,<a href="../../../../org/apache/geode/cache/FixedPartitionResolver.html" title="type parameter in FixedPartitionResolver">V</a>> opDetails, |
| <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="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> targetPartitions)</code> |
| <div class="block">This method is used to get the name of the partition for the given entry operation.</div> |
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| <code><a href="../../../../org/apache/geode/cache/PartitionResolver.html#getName--">getName</a>, <a href="../../../../org/apache/geode/cache/PartitionResolver.html#getRoutingObject-org.apache.geode.cache.EntryOperation-">getRoutingObject</a></code></li> |
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| <code><a href="../../../../org/apache/geode/cache/Declarable.html#init-java.util.Properties-">init</a>, <a href="../../../../org/apache/geode/cache/Declarable.html#initialize-org.apache.geode.cache.Cache-java.util.Properties-">initialize</a></code></li> |
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| <h4>getPartitionName</h4> |
| <pre><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> getPartitionName(<a href="../../../../org/apache/geode/cache/EntryOperation.html" title="interface in org.apache.geode.cache">EntryOperation</a><<a href="../../../../org/apache/geode/cache/FixedPartitionResolver.html" title="type parameter in FixedPartitionResolver">K</a>,<a href="../../../../org/apache/geode/cache/FixedPartitionResolver.html" title="type parameter in FixedPartitionResolver">V</a>> opDetails, |
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| <div class="block">This method is used to get the name of the partition for the given entry operation.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>opDetails</code> - the details of the entry operation e.g. <a href="../../../../org/apache/geode/cache/Region.html#get-java.lang.Object-"><code>Region.get(Object)</code></a></dd> |
| <dd><code>targetPartitions</code> - Avoid using this parameter.This set is deprecated from 8.0 and same |
| will be removed in future release. Represents all the available primary partitions on |
| the nodes.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>partition-name associated with node which allows mapping of given data to user defined |
| partition</dd> |
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