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    <title>Magnolia - Issue tracker</title>
    <link>https://jira.magnolia-cms.com</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-uk</language>    <build-info>
        <version>9.4.2</version>
        <build-number>940002</build-number>
        <build-date>19-01-2023</build-date>
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<item>
            <title>[MGNLSSO-25] Write a UserManager to create users on the fly</title>
                <link>https://jira.magnolia-cms.com/browse/MGNLSSO-25</link>
                <project id="15486" key="MGNLSSO">Single Sign On</project>
                    <description>&lt;p&gt;I&apos;m working on a setup with external users. There are two scenarios there:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;I create users on the fly without an UserManager&lt;/li&gt;
	&lt;li&gt;I have a custom UserManager acting as a proxy between Magnolia and, for instance, an LDAP server&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;This is at least what Richard Unger mentions in the following page:&#160;&lt;a href=&quot;http://magnolia.10149.n7.nabble.com/How-to-instantiate-a-User-to-call-MgnlContext-login-mgnlUser-td38527.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://magnolia.10149.n7.nabble.com/How-to-instantiate-a-User-to-call-MgnlContext-login-mgnlUser-td38527.html&lt;/a&gt;&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;Then, if your users are external to magnolia, you have 2 ways to go after this:&lt;/p&gt;

&lt;p&gt;1) Set up an external user manager which connects to your external user data-source to read users.&lt;br/&gt;
 In this case you don&apos;t need to do any more work. If your ExternalUserManager is correctly set up (you can browse the users in magnolia&apos;s users tree), the rest should then just work.&lt;/p&gt;

&lt;p&gt;2) Create the External User &quot;on the fly&quot;. Extend the JCRAuthenticationModule for JAAS, and instead of looking up the user, just create the user (as an ExternalUser) and add roles and groups as needed. The JCRAuthorizationModule should then pick up those roles and groups, and set up the ACLs correctly.&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;I have gone with option 1. This setup is working well except in&#160;&lt;tt&gt;info.magnolia.task.persistence.TasksStoreImpl#prepareQueryStatementByUserAndStatuses&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;Where&#160;&lt;tt&gt;securitySupport.getUserManager().getUser(userId).getAllGroups()&lt;/tt&gt; throws an NPE, preventing the whole UI from displaying (see stack.txt).&lt;/p&gt;

&lt;p&gt;I suggest to wrap an optional around the call to get the UserManager.&lt;/p&gt;</description>
                <environment></environment>
        <key id="86521">MGNLSSO-25</key>
            <summary>Write a UserManager to create users on the fly</summary>
                <type id="3" iconUrl="https://jira.magnolia-cms.com/secure/viewavatar?size=xsmall&amp;avatarId=10898&amp;avatarType=issuetype">Task</type>
                                            <priority id="6" iconUrl="https://jira.magnolia-cms.com/images/icons/priorities/neutral.gif">Neutral</priority>
                        <status id="6" iconUrl="https://jira.magnolia-cms.com/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are not closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="1">Fixed</resolution>
                                        <assignee username="mmichel">Maxime Michel</assignee>
                                    <reporter username="mmichel">Maxime Michel</reporter>
                        <labels>
                    </labels>
                <created>Thu, 7 May 2020 08:35:25 +0200</created>
                <updated>Tue, 7 Jul 2020 12:40:07 +0200</updated>
                            <resolved>Fri, 15 May 2020 13:39:21 +0200</resolved>
                                                    <fixVersion>1.0</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="219159" author="mmichel" created="Wed, 13 May 2020 12:48:47 +0200"  >&lt;p&gt;Status update: Richard Unger&apos;s comment is no longer true. It is important in Magnolia 6.0+ that there is a user manager, even if to simply create on the fly users. This ticket is now about adding one to the module.&lt;/p&gt;</comment>
                    </comments>
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                            <attachment id="65056" name="stack.txt" size="18787" author="mmichel" created="Thu, 7 May 2020 08:35:22 +0200"/>
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