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<div class="subTitle">gobblin.data.management.retention.policy</div>
<h2 title="Class CombineRetentionPolicy" class="title">Class CombineRetentionPolicy&lt;T extends <a href="../../../../../gobblin/data/management/version/DatasetVersion.html" title="interface in gobblin.data.management.version">DatasetVersion</a>&gt;</h2>
</div>
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<li>gobblin.data.management.retention.policy.CombineRetentionPolicy&lt;T&gt;</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../gobblin/data/management/retention/policy/RetentionPolicy.html" title="interface in gobblin.data.management.retention.policy">RetentionPolicy</a>&lt;T&gt;</dd>
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<hr>
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<pre>public class <span class="typeNameLabel">CombineRetentionPolicy&lt;T extends <a href="../../../../../gobblin/data/management/version/DatasetVersion.html" title="interface in gobblin.data.management.version">DatasetVersion</a>&gt;</span>
extends <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../../../gobblin/data/management/retention/policy/RetentionPolicy.html" title="interface in gobblin.data.management.retention.policy">RetentionPolicy</a>&lt;T&gt;</pre>
<div class="block">Implementation of <a href="../../../../../gobblin/data/management/retention/policy/RetentionPolicy.html" title="interface in gobblin.data.management.retention.policy"><code>RetentionPolicy</code></a> that allows combining different
policies through a union or intersect operation. It will combine the delete sets from each sub-policy using the
specified operation.
<p>
For example, if there are five versions of a dataset, a, b, c, d, e, policy1 would delete versions a, b, while
policy2 would delete versions b,c, using <a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="class in gobblin.data.management.retention.policy"><code>CombineRetentionPolicy</code></a> will delete versions a, b, c if the
operation is UNION, or it will delete only version b if the operation is INTERSECT.
</p>
<p>
<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="class in gobblin.data.management.retention.policy"><code>CombineRetentionPolicy</code></a> expects the following configurations:
* gobblin.retention.combine.retention.policy.class.* : specifies the classes of the policies to combine. * can be
any value, and each such configuration defines only one class.
* gobblin.retention.combine.retention.policy.delete.sets.combine.operation : operation used to combine delete
sets. Can be UNION or INTERSECT.
Additionally, any configuration necessary for combined policies must be specified.
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<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.DeletableCombineOperation.html" title="enum in gobblin.data.management.retention.policy">CombineRetentionPolicy.DeletableCombineOperation</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/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="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html#DELETE_SETS_COMBINE_OPERATION">DELETE_SETS_COMBINE_OPERATION</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/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="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html#RETENTION_POLICIES_PREFIX">RETENTION_POLICIES_PREFIX</a></span></code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html#CombineRetentionPolicy-java.util.List-gobblin.data.management.retention.policy.CombineRetentionPolicy.DeletableCombineOperation-">CombineRetentionPolicy</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/RetentionPolicy.html" title="interface in gobblin.data.management.retention.policy">RetentionPolicy</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;&gt;&nbsp;retentionPolicies,
<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.DeletableCombineOperation.html" title="enum in gobblin.data.management.retention.policy">CombineRetentionPolicy.DeletableCombineOperation</a>&nbsp;combineOperation)</code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html#CombineRetentionPolicy-java.util.Properties-">CombineRetentionPolicy</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/util/Properties.html?is-external=true" title="class or interface in java.util">Properties</a>&nbsp;props)</code>&nbsp;</td>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html#commonSuperclass-java.lang.Class-java.lang.Class-">commonSuperclass</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;&nbsp;classA,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;&nbsp;classB)</code>&nbsp;</td>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html#listDeletableVersions-java.util.List-">listDeletableVersions</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;&nbsp;allVersions)</code>&nbsp;</td>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html#versionClass--">versionClass</a></span>()</code>
<div class="block">Returns the most specific common superclass for the <a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html#versionClass--"><code>versionClass()</code></a> of each embedded policy.</div>
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<code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<pre>public static final&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> RETENTION_POLICIES_PREFIX</pre>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../constant-values.html#gobblin.data.management.retention.policy.CombineRetentionPolicy.RETENTION_POLICIES_PREFIX">Constant Field Values</a></dd>
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<pre>public static final&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> DELETE_SETS_COMBINE_OPERATION</pre>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../constant-values.html#gobblin.data.management.retention.policy.CombineRetentionPolicy.DELETE_SETS_COMBINE_OPERATION">Constant Field Values</a></dd>
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<pre>public&nbsp;CombineRetentionPolicy(<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/RetentionPolicy.html" title="interface in gobblin.data.management.retention.policy">RetentionPolicy</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;&gt;&nbsp;retentionPolicies,
<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.DeletableCombineOperation.html" title="enum in gobblin.data.management.retention.policy">CombineRetentionPolicy.DeletableCombineOperation</a>&nbsp;combineOperation)</pre>
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<pre>public&nbsp;CombineRetentionPolicy(<a href="https://docs.oracle.com/javase/7/docs/api/java/util/Properties.html?is-external=true" title="class or interface in java.util">Properties</a>&nbsp;props)
throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;&nbsp;versionClass()</pre>
<div class="block">Returns the most specific common superclass for the <a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html#versionClass--"><code>versionClass()</code></a> of each embedded policy.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../gobblin/data/management/retention/policy/RetentionPolicy.html#versionClass--">versionClass</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../gobblin/data/management/retention/policy/RetentionPolicy.html" title="interface in gobblin.data.management.retention.policy">RetentionPolicy</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a> extends <a href="../../../../../gobblin/data/management/version/DatasetVersion.html" title="interface in gobblin.data.management.version">DatasetVersion</a>&gt;</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>class of T.</dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;&nbsp;listDeletableVersions(<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a>&gt;&nbsp;allVersions)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../gobblin/data/management/retention/policy/RetentionPolicy.html#listDeletableVersions-java.util.List-">listDeletableVersions</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../gobblin/data/management/retention/policy/RetentionPolicy.html" title="interface in gobblin.data.management.retention.policy">RetentionPolicy</a>&lt;<a href="../../../../../gobblin/data/management/retention/policy/CombineRetentionPolicy.html" title="type parameter in CombineRetentionPolicy">T</a> extends <a href="../../../../../gobblin/data/management/version/DatasetVersion.html" title="interface in gobblin.data.management.version">DatasetVersion</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>allVersions</code> - List of all dataset versions in the file system,
sorted from newest to oldest.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Collection of dataset versions that should be deleted.</dd>
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