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    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-73540] Get rid of balancer policy abstract classes </title>
                <link>https://jira.mongodb.org/browse/SERVER-73540</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;BalancerDefragmentationPolicy&lt;/tt&gt; and the &lt;tt&gt;BalancerChunkSelectionPolicy&lt;/tt&gt; have both an abstract class and a single implementation of it.&lt;/p&gt;

&lt;p&gt;Abstract classes are on &lt;a href=&quot;https://github.com/10gen/mongo/blob/master/src/mongo/db/s/balancer/balancer_defragmentation_policy.h&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;balancer_defragmentation_policy.h&lt;/a&gt; and &lt;a href=&quot;https://github.com/10gen/mongo/blob/master/src/mongo/db/s/balancer/balancer_chunk_selection_policy.h&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;balancer_chunk_selection_policy.h&lt;/a&gt;&lt;br/&gt;
Implementations are on &lt;a href=&quot;https://github.com/10gen/mongo/blob/master/src/mongo/db/s/balancer/balancer_defragmentation_policy_impl.h&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;balancer_defragmentation_policy_impl.h&lt;/a&gt; and &lt;a href=&quot;https://github.com/10gen/mongo/blob/master/src/mongo/db/s/balancer/balancer_chunk_selection_policy_impl.h&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;balancer_chunk_selection_policy_impl.h&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;We consider that there is no need to have an abstract class since there is only a single implementation and there is no plan to create any testing mock of them.&lt;/p&gt;

&lt;p&gt;The aim of this ticket is to get rid of the abstract class files, remove the &lt;tt&gt;&amp;#42;impl.h&lt;/tt&gt; suffix from the &lt;tt&gt;balancer_&amp;#42;_impl.h&lt;/tt&gt; files and remove also the &lt;tt&gt;*Impl&lt;/tt&gt; suffix of the &lt;tt&gt;BalancerDefragmentationPolicyImpl&lt;/tt&gt;&#160;and &lt;tt&gt;BalancerChunkSelectionPolicyImpl&lt;/tt&gt;&#160;classes.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Note: There is no need to do the same with `ClusterChunksResizePolicy` since it will go away on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-66652&quot; title=&quot;Remove NoMoreAutoSplitter feature flag&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-66652&quot;&gt;&lt;del&gt;SERVER-66652&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2250599">SERVER-73540</key>
            <summary>Get rid of balancer policy abstract classes </summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="antonio.fuschetto@mongodb.com">Antonio Fuschetto</assignee>
                                    <reporter username="silvia.surroca@mongodb.com">Silvia Surroca</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Thu, 2 Feb 2023 10:42:59 +0000</created>
                <updated>Sun, 29 Oct 2023 21:27:01 +0000</updated>
                            <resolved>Thu, 1 Jun 2023 14:58:55 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5467321" author="xgen-internal-githook" created="Thu, 1 Jun 2023 14:14:51 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Antonio Fuschetto&apos;, &apos;email&apos;: &apos;antonio.fuschetto@mongodb.com&apos;, &apos;username&apos;: &apos;afuschetto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73540&quot; title=&quot;Get rid of balancer policy abstract classes &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73540&quot;&gt;&lt;del&gt;SERVER-73540&lt;/del&gt;&lt;/a&gt; Get rid of balancer policy abstract classes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a1775cfb8d7f1a4343b2b0138d4b45635d34db1e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a1775cfb8d7f1a4343b2b0138d4b45635d34db1e&lt;/a&gt;&lt;/p&gt;</comment>
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