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| <div class="subTitle">org.apache.ignite.cache.affinity</div> |
| <h2 title="Interface Affinity" class="title">Interface Affinity<span class='angle_bracket'><</span>K<span class='angle_bracket'>></span></h2> |
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| <pre>public interface <span class="typeNameLabel">Affinity<span class='angle_bracket'><</span>K<span class='angle_bracket'>></span></span></pre> |
| <div class="block">Provides affinity information to detect which node is primary and which nodes are |
| backups for a partitioned or replicated cache. You can get an instance of this |
| interface by calling <code>Ignite.affinity(cacheName)</code> method. |
| <p> |
| Mapping of a key to a node is a three-step operation. First step will get an affinity key for given key |
| using <a href="../../../../../org/apache/ignite/cache/affinity/AffinityKeyMapper.html" title="interface in org.apache.ignite.cache.affinity"><code>AffinityKeyMapper</code></a>. If mapper is not specified, the original key will be used. Second step |
| will map affinity key to partition using <a href="../../../../../org/apache/ignite/cache/affinity/AffinityFunction.html#partition-java.lang.Object-"><code>AffinityFunction.partition(Object)</code></a> method. Third step |
| will map obtained partition to nodes for current grid topology version. |
| <p> |
| Interface provides various <code>'mapKeysToNodes(..)'</code> methods which provide node affinity mapping for |
| given keys. All <code>'mapKeysToNodes(..)'</code> methods are not transactional and will not enlist |
| keys into ongoing transaction.</div> |
| </li> |
| </ul> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#affinityKey-K-">affinityKey</a></span>(<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</code> |
| <div class="block">Maps passed in key to a key which will be used for node affinity.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>int[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#allPartitions-org.apache.ignite.cluster.ClusterNode-">allPartitions</a></span>(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n)</code> |
| <div class="block">Gets partition ids for which given cluster node has any ownership |
| (either primary or backup).</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>int[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#backupPartitions-org.apache.ignite.cluster.ClusterNode-">backupPartitions</a></span>(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n)</code> |
| <div class="block">Gets partition ids for which given cluster node has backup ownership.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#isBackup-org.apache.ignite.cluster.ClusterNode-K-">isBackup</a></span>(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n, |
| <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</code> |
| <div class="block">Returns <code>true</code> if local node is one of the backup nodes for given key.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#isPrimary-org.apache.ignite.cluster.ClusterNode-K-">isPrimary</a></span>(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n, |
| <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</code> |
| <div class="block">Returns <code>true</code> if given node is the primary node for given key.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#isPrimaryOrBackup-org.apache.ignite.cluster.ClusterNode-K-">isPrimaryOrBackup</a></span>(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n, |
| <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</code> |
| <div class="block">Returns <code>true</code> if local node is primary or one of the backup nodes |
| |
| This method is essentially equivalent to calling |
| <i>"<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#isPrimary-org.apache.ignite.cluster.ClusterNode-K-"><code>isPrimary(ClusterNode, Object)</code></a> || <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#isBackup-org.apache.ignite.cluster.ClusterNode-K-"><code>isBackup(ClusterNode, Object)</code></a>)"</i>, |
| however it is more efficient as it makes both checks at once.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><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><span class='angle_bracket'><</span><a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a><span class='angle_bracket'>></span><span class='angle_bracket'>></span></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#mapKeysToNodes-java.util.Collection-">mapKeysToNodes</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span>? extends <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a><span class='angle_bracket'>></span> keys)</code> |
| <div class="block">This method provides ability to detect which keys are mapped to which nodes.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>@Nullable <a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#mapKeyToNode-K-">mapKeyToNode</a></span>(<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</code> |
| <div class="block">This method provides ability to detect to which primary node the given key |
| is mapped.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#mapKeyToPrimaryAndBackups-K-">mapKeyToPrimaryAndBackups</a></span>(<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</code> |
| <div class="block">Gets primary and backup nodes for the key.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><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><span class='angle_bracket'><</span><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>,<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#mapPartitionsToNodes-java.util.Collection-">mapPartitionsToNodes</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a><span class='angle_bracket'>></span> parts)</code> |
| <div class="block">Gets primary nodes for the given partitions.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#mapPartitionToNode-int-">mapPartitionToNode</a></span>(int part)</code> |
| <div class="block">Gets primary node for the given partition.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#mapPartitionToPrimaryAndBackups-int-">mapPartitionToPrimaryAndBackups</a></span>(int part)</code> |
| <div class="block">Gets primary and backup nodes for partition.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#partition-K-">partition</a></span>(<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</code> |
| <div class="block">Gets partition id for the given key.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#partitions--">partitions</a></span>()</code> |
| <div class="block">Gets number of partitions in cache according to configured affinity function.</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>int[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#primaryPartitions-org.apache.ignite.cluster.ClusterNode-">primaryPartitions</a></span>(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n)</code> |
| <div class="block">Gets partition ids for which the given cluster node has primary ownership.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
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| <h4>partitions</h4> |
| <pre>int partitions()</pre> |
| <div class="block">Gets number of partitions in cache according to configured affinity function.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Number of cache partitions.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/ignite/cache/affinity/AffinityFunction.html" title="interface in org.apache.ignite.cache.affinity"><code>AffinityFunction</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#getAffinity--"><code>CacheConfiguration.getAffinity()</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#setAffinity-org.apache.ignite.cache.affinity.AffinityFunction-"><code>CacheConfiguration.setAffinity(AffinityFunction)</code></a></dd> |
| </dl> |
| </li> |
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| <a name="partition-java.lang.Object-"> |
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| <h4>partition</h4> |
| <pre>int partition(<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</pre> |
| <div class="block">Gets partition id for the given key.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>key</code> - Key to get partition id for.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Partition id.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/ignite/cache/affinity/AffinityFunction.html" title="interface in org.apache.ignite.cache.affinity"><code>AffinityFunction</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#getAffinity--"><code>CacheConfiguration.getAffinity()</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#setAffinity-org.apache.ignite.cache.affinity.AffinityFunction-"><code>CacheConfiguration.setAffinity(AffinityFunction)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isPrimary-org.apache.ignite.cluster.ClusterNode-java.lang.Object-"> |
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| <h4>isPrimary</h4> |
| <pre>boolean isPrimary(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n, |
| <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</pre> |
| <div class="block">Returns <code>true</code> if given node is the primary node for given key.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>n</code> - Node to check.</dd> |
| <dd><code>key</code> - Key to check.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>True</code> if local node is the primary node for given key.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isBackup-org.apache.ignite.cluster.ClusterNode-java.lang.Object-"> |
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| <h4>isBackup</h4> |
| <pre>boolean isBackup(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n, |
| <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</pre> |
| <div class="block">Returns <code>true</code> if local node is one of the backup nodes for given key.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>n</code> - Node to check.</dd> |
| <dd><code>key</code> - Key to check.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>True</code> if local node is one of the backup nodes for given key.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isPrimaryOrBackup-org.apache.ignite.cluster.ClusterNode-java.lang.Object-"> |
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| <h4>isPrimaryOrBackup</h4> |
| <pre>boolean isPrimaryOrBackup(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n, |
| <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</pre> |
| <div class="block">Returns <code>true</code> if local node is primary or one of the backup nodes |
| <p> |
| This method is essentially equivalent to calling |
| <i>"<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#isPrimary-org.apache.ignite.cluster.ClusterNode-K-"><code>isPrimary(ClusterNode, Object)</code></a> || <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html#isBackup-org.apache.ignite.cluster.ClusterNode-K-"><code>isBackup(ClusterNode, Object)</code></a>)"</i>, |
| however it is more efficient as it makes both checks at once.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>n</code> - Node to check.</dd> |
| <dd><code>key</code> - Key to check.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>True</code> if local node is primary or backup for given key.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="primaryPartitions-org.apache.ignite.cluster.ClusterNode-"> |
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| <h4>primaryPartitions</h4> |
| <pre>int[] primaryPartitions(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n)</pre> |
| <div class="block">Gets partition ids for which the given cluster node has primary ownership.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>n</code> - Cluster node.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Partition ids for which given cluster node has primary ownership.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/ignite/cache/affinity/AffinityFunction.html" title="interface in org.apache.ignite.cache.affinity"><code>AffinityFunction</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#getAffinity--"><code>CacheConfiguration.getAffinity()</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#setAffinity-org.apache.ignite.cache.affinity.AffinityFunction-"><code>CacheConfiguration.setAffinity(AffinityFunction)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="backupPartitions-org.apache.ignite.cluster.ClusterNode-"> |
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| <h4>backupPartitions</h4> |
| <pre>int[] backupPartitions(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n)</pre> |
| <div class="block">Gets partition ids for which given cluster node has backup ownership.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>n</code> - Cluster node.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Partition ids for which given cluster node has backup ownership.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/ignite/cache/affinity/AffinityFunction.html" title="interface in org.apache.ignite.cache.affinity"><code>AffinityFunction</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#getAffinity--"><code>CacheConfiguration.getAffinity()</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#setAffinity-org.apache.ignite.cache.affinity.AffinityFunction-"><code>CacheConfiguration.setAffinity(AffinityFunction)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="allPartitions-org.apache.ignite.cluster.ClusterNode-"> |
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| <h4>allPartitions</h4> |
| <pre>int[] allPartitions(<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> n)</pre> |
| <div class="block">Gets partition ids for which given cluster node has any ownership |
| (either primary or backup).</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>n</code> - Cluster node.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Partition ids for which given cluster node has any ownership, primary or backup.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/ignite/cache/affinity/AffinityFunction.html" title="interface in org.apache.ignite.cache.affinity"><code>AffinityFunction</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#getAffinity--"><code>CacheConfiguration.getAffinity()</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#setAffinity-org.apache.ignite.cache.affinity.AffinityFunction-"><code>CacheConfiguration.setAffinity(AffinityFunction)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="affinityKey-java.lang.Object-"> |
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| </a><a name="affinityKey-K-"> |
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| <h4>affinityKey</h4> |
| <pre><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> affinityKey(<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</pre> |
| <div class="block">Maps passed in key to a key which will be used for node affinity. The affinity |
| key may be different from actual key if some field in the actual key was |
| designated for affinity mapping via <a href="../../../../../org/apache/ignite/cache/affinity/AffinityKeyMapped.html" title="annotation in org.apache.ignite.cache.affinity"><code>AffinityKeyMapped</code></a> annotation |
| or if a custom <a href="../../../../../org/apache/ignite/cache/affinity/AffinityKeyMapper.html" title="interface in org.apache.ignite.cache.affinity"><code>AffinityKeyMapper</code></a> was configured.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>key</code> - Key to map.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Key to be used for node-to-affinity mapping (may be the same |
| key as passed in).</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="mapKeysToNodes-java.util.Collection-"> |
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| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>mapKeysToNodes</h4> |
| <pre><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><span class='angle_bracket'><</span><a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a><span class='angle_bracket'>></span><span class='angle_bracket'>></span> mapKeysToNodes(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span>? extends <a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a><span class='angle_bracket'>></span> keys)</pre> |
| <div class="block">This method provides ability to detect which keys are mapped to which nodes. |
| Use it to determine which nodes are storing which keys prior to sending |
| jobs that access these keys. |
| <p> |
| This method works as following: |
| <ul> |
| <li>For local caches it returns only local node mapped to all keys.</li> |
| <li>For other caches, the returned map represents node-to-key affinity.</li> |
| </ul></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>keys</code> - Keys to map to nodes.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Map of nodes to keys.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="mapKeyToNode-java.lang.Object-"> |
| <!-- --> |
| </a><a name="mapKeyToNode-K-"> |
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| <h4>mapKeyToNode</h4> |
| <pre>@Nullable |
| @Nullable <a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> mapKeyToNode(<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</pre> |
| <div class="block">This method provides ability to detect to which primary node the given key |
| is mapped. Use it to determine which nodes are storing which keys prior to sending |
| jobs that access these keys. |
| <p> |
| This method works as following: |
| <ul> |
| <li>For local caches it returns only local node ID.</li> |
| <li>For other caches, primary node for the given key is returned.</li> |
| </ul></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>key</code> - Keys to map to a node.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Primary node for the key.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="mapKeyToPrimaryAndBackups-java.lang.Object-"> |
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| </a><a name="mapKeyToPrimaryAndBackups-K-"> |
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| <h4>mapKeyToPrimaryAndBackups</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span> mapKeyToPrimaryAndBackups(<a href="../../../../../org/apache/ignite/cache/affinity/Affinity.html" title="type parameter in Affinity">K</a> key)</pre> |
| <div class="block">Gets primary and backup nodes for the key. Note that primary node is always |
| first in the returned collection.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>key</code> - Key to get affinity nodes for.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Collection of primary and backup nodes for the key with primary node |
| always first.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="mapPartitionToNode-int-"> |
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| <h4>mapPartitionToNode</h4> |
| <pre><a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> mapPartitionToNode(int part)</pre> |
| <div class="block">Gets primary node for the given partition.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>part</code> - Partition id.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Primary node for the given partition.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/ignite/cache/affinity/AffinityFunction.html" title="interface in org.apache.ignite.cache.affinity"><code>AffinityFunction</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#getAffinity--"><code>CacheConfiguration.getAffinity()</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#setAffinity-org.apache.ignite.cache.affinity.AffinityFunction-"><code>CacheConfiguration.setAffinity(AffinityFunction)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>mapPartitionsToNodes</h4> |
| <pre><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><span class='angle_bracket'><</span><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>,<a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span> mapPartitionsToNodes(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a><span class='angle_bracket'>></span> parts)</pre> |
| <div class="block">Gets primary nodes for the given partitions.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>parts</code> - Partition ids.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Mapping of given partitions to their primary nodes.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/ignite/cache/affinity/AffinityFunction.html" title="interface in org.apache.ignite.cache.affinity"><code>AffinityFunction</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#getAffinity--"><code>CacheConfiguration.getAffinity()</code></a>, |
| <a href="../../../../../org/apache/ignite/configuration/CacheConfiguration.html#setAffinity-org.apache.ignite.cache.affinity.AffinityFunction-"><code>CacheConfiguration.setAffinity(AffinityFunction)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>mapPartitionToPrimaryAndBackups</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span> mapPartitionToPrimaryAndBackups(int part)</pre> |
| <div class="block">Gets primary and backup nodes for partition. Note that primary node is always |
| first in the returned collection.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>part</code> - Partition to get affinity nodes for.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Collection of primary and backup nodes for partition with primary node |
| always first.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/ignite/IgniteException.html" title="class in org.apache.ignite">IgniteException</a></code> - If there are no alive nodes for this cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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| <li class="navBarCell1Rev">Class</li> |
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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>2020 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> </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 Database and Caching Platform</b> </td> <td>: ver. <strong>2.9.1</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>: December 9 2020 </td> </tr> </tbody> </table> </td> </tr> </table></small></p> |
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