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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-48978] Futurize ServiceEntryPoint::handleRequest()</title>
                <link>https://jira.mongodb.org/browse/SERVER-48978</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;tt&gt;ServiceEntryPoint&lt;/tt&gt; is the second piece of our command pathway after &lt;tt&gt;ServiceStateMachine&lt;/tt&gt;. They meet &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ba3e5964f9ac140723df5b8a012306b30a1cb5b9/src/mongo/transport/service_state_machine.cpp#L478&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; when &lt;tt&gt;handleRequest()&lt;/tt&gt; is invoked. Let&apos;s convert that virtual function signature,&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;DbResponse handleRequest(OperationContext* opCtx, const Message&amp;amp; request);&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;will become&lt;/p&gt;
&lt;p/&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;Future&amp;lt;DbResponse&amp;gt; handleRequest(OperationContext* opCtx, const Message&amp;amp; request) noexcept;&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;Futures can be made from their payload type (see &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ba3e5964f9ac140723df5b8a012306b30a1cb5b9/src/mongo/util/future.h#L320-L322&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;), so converting each overridden function for derived classes should be simple for now. The &lt;tt&gt;noexcept&lt;/tt&gt; implies that no exception should ever leave &lt;tt&gt;handleRequest()&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;Once we have that future in &lt;tt&gt;ServiceStateMachine::_processMessage()&lt;/tt&gt;, we can take the post processing &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ba3e5964f9ac140723df5b8a012306b30a1cb5b9/src/mongo/transport/service_state_machine.cpp#L480-L534&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; as an &lt;tt&gt;onCompletion()&lt;/tt&gt; callback and then call &lt;tt&gt;get()&lt;/tt&gt; to synchronize the asynchronous execution on the local thread.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1384198">SERVER-48978</key>
            <summary>Futurize ServiceEntryPoint::handleRequest()</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="a.chen@mongodb.com">Andrew Chen</assignee>
                                    <reporter username="ben.caimano@mongodb.com">Benjamin Caimano</reporter>
                        <labels>
                    </labels>
                <created>Thu, 18 Jun 2020 20:18:38 +0000</created>
                <updated>Sun, 29 Oct 2023 22:06:44 +0000</updated>
                            <resolved>Thu, 30 Jul 2020 14:54:50 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3313866" author="xgen-internal-githook" created="Thu, 30 Jul 2020 14:48:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Chen&apos;, &apos;email&apos;: &apos;a.chen@mongodb.com&apos;, &apos;username&apos;: &apos;AndrooTheChen&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48978&quot; title=&quot;Futurize ServiceEntryPoint::handleRequest()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48978&quot;&gt;&lt;del&gt;SERVER-48978&lt;/del&gt;&lt;/a&gt; Futurize handleRequest&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/051bd6e51b33d7fd8a1265e166efffd20178a86d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/051bd6e51b33d7fd8a1265e166efffd20178a86d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3313865" author="xgen-internal-githook" created="Thu, 30 Jul 2020 14:48:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Chen&apos;, &apos;email&apos;: &apos;a.chen@mongodb.com&apos;, &apos;username&apos;: &apos;AndrooTheChen&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48978&quot; title=&quot;Futurize ServiceEntryPoint::handleRequest()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48978&quot;&gt;&lt;del&gt;SERVER-48978&lt;/del&gt;&lt;/a&gt; Futurize handleRequest in mongo enterprise module&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/e3c95872ad03026da2438e00576047e93bb220cd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/e3c95872ad03026da2438e00576047e93bb220cd&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10011">
                    <name>Depends</name>
                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="1392355">SERVER-49104</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1233301">SERVER-46653</issuekey>
        </issuelink>
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