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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>[MGNLDMS-99] Creating custom tree configuration for DMS throws an error</title>
                <link>https://jira.magnolia-cms.com/browse/MGNLDMS-99</link>
                <project id="10112" key="MGNLDMS">Document Management System (closed)</project>
                    <description>&lt;p&gt;When trying to create a custom DMS tree configuration (to set the starting path) I get an error.&lt;br/&gt;
The same approach works for adminInterface trees but not in DMS trees&lt;/p&gt;

&lt;p&gt;Steps:&lt;/p&gt;

&lt;p&gt;1. create a custom tree config class:&lt;/p&gt;

&lt;p&gt;public final class WwwDMSTreeConfiguration extends DMSAdminTreeConfig {&lt;br/&gt;
    @Override&lt;br/&gt;
    public void prepareTree(Tree pTree, boolean pBrowseMode, HttpServletRequest pRequest) {&lt;br/&gt;
        if(pTree.getPath().equals(&quot;/&quot;))&lt;/p&gt;
{
            pTree.setPath(&quot;/www&quot;);
        }
&lt;p&gt;        super.prepareTree(pTree, pBrowseMode, pRequest);&lt;br/&gt;
    }&lt;br/&gt;
} // end of WwwDMSTreeConfiguration&lt;/p&gt;

&lt;p&gt;2. copy /config/modules/dms/trees/dms to  /config/modules/dms/trees/dms-test&lt;br/&gt;
3. change configurationClass in /config/modules/dms/trees/dms-test to above defined one&lt;br/&gt;
4. use dialog uuidLink control and specify the tree property as tree=dms-test&lt;/p&gt;

&lt;p&gt;The above should have opened DMS tree at the location /www but instead I get the following exception:&lt;/p&gt;

&lt;p&gt;ERROR  org.apache.catalina.core.ContainerBase.&lt;span class=&quot;error&quot;&gt;&amp;#91;jboss.web&amp;#93;&lt;/span&gt;.&lt;span class=&quot;error&quot;&gt;&amp;#91;localhost&amp;#93;&lt;/span&gt;.&lt;span class=&quot;error&quot;&gt;&amp;#91;/magnolia-cms&amp;#93;&lt;/span&gt;.&lt;span class=&quot;error&quot;&gt;&amp;#91;AdminTreeServlet&amp;#93;&lt;/span&gt; 22.05.2007 15:58:41 &amp;#8211; Servlet.service() for servlet AdminTreeServlet threw exception&lt;br/&gt;
java.lang.NullPointerException&lt;br/&gt;
	at info.magnolia.module.admininterface.AdminTreeMVCHandler.renderHtml(AdminTreeMVCHandler.java:718)&lt;br/&gt;
	at info.magnolia.cms.servlets.MVCServlet.doPost(MVCServlet.java:112)&lt;br/&gt;
	at info.magnolia.cms.servlets.MVCServlet.doGet(MVCServlet.java:48)&lt;br/&gt;
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)&lt;br/&gt;
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)&lt;br/&gt;
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)&lt;br/&gt;
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:42)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:50)&lt;br/&gt;
	at info.magnolia.cms.filters.MultipartRequestFilter.doFilter(MultipartRequestFilter.java:59)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:48)&lt;br/&gt;
	at info.magnolia.cms.filters.MgnlVirtualUriFilter.doFilter(MgnlVirtualUriFilter.java:54)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:48)&lt;br/&gt;
	at info.magnolia.cms.cache.CacheFilter.doFilter(CacheFilter.java:97)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:48)&lt;br/&gt;
	at info.magnolia.cms.i18n.I18NSupportFilter.doFilter(I18NSupportFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:48)&lt;br/&gt;
	at info.magnolia.cms.security.BaseSecurityFilter.doFilter(BaseSecurityFilter.java:40)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:48)&lt;br/&gt;
	at info.magnolia.cms.security.auth.login.LoginFilter.doFilter(LoginFilter.java:61)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:48)&lt;br/&gt;
	at info.magnolia.cms.security.BaseSecurityFilter.doFilter(BaseSecurityFilter.java:40)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:48)&lt;br/&gt;
	at info.magnolia.cms.filters.ContentTypeFilter.doFilter(ContentTypeFilter.java:47)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:48)&lt;br/&gt;
	at info.magnolia.cms.filters.MgnlContextFilter.doFilter(MgnlContextFilter.java:40)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaFilterChain.doFilter(MagnoliaFilterChain.java:48)&lt;br/&gt;
	at info.magnolia.cms.filters.MagnoliaMainFilter.doFilter(MagnoliaMainFilter.java:97)&lt;br/&gt;
	at info.magnolia.cms.filters.AbstractMagnoliaFilter.doFilter(AbstractMagnoliaFilter.java:46)&lt;br/&gt;
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)&lt;br/&gt;
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)&lt;br/&gt;
	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)&lt;br/&gt;
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)&lt;br/&gt;
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)&lt;br/&gt;
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)&lt;br/&gt;
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)&lt;br/&gt;
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)&lt;br/&gt;
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)&lt;br/&gt;
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)&lt;br/&gt;
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)&lt;br/&gt;
	at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)&lt;br/&gt;
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)&lt;br/&gt;
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)&lt;br/&gt;
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)&lt;br/&gt;
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)&lt;br/&gt;
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)&lt;br/&gt;
	at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)&lt;br/&gt;
	at java.lang.Thread.run(Thread.java:619)&lt;/p&gt;</description>
                <environment></environment>
        <key id="12871">MGNLDMS-99</key>
            <summary>Creating custom tree configuration for DMS throws an error</summary>
                <type id="1" iconUrl="https://jira.magnolia-cms.com/secure/viewavatar?size=xsmall&amp;avatarId=10883&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.magnolia-cms.com/images/icons/priorities/major.svg">Major</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="5">Cannot Reproduce</resolution>
                                        <assignee username="gjoseph">Magnolia International</assignee>
                                    <reporter username="zambak">zam6ak</reporter>
                        <labels>
                    </labels>
                <created>Tue, 22 May 2007 22:11:31 +0200</created>
                <updated>Wed, 10 Sep 2008 18:54:17 +0200</updated>
                            <resolved>Wed, 10 Sep 2008 18:47:51 +0200</resolved>
                                    <version>1.2-m3</version>
                                                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="17855" author="gjoseph" created="Wed, 10 Sep 2008 18:47:51 +0200"  >&lt;p&gt;The following works just fine for me:&lt;/p&gt;
&lt;div class=&quot;preformatted panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;preformattedContent panelContent&quot;&gt;
&lt;pre&gt;public class MyDmsTreeConfig extends DMSAdminTreeConfig {

    public void prepareTree(Tree tree, boolean browseMode, HttpServletRequest request) {

        if (tree.getPath().equals(&quot;/&quot;)) {
            tree.setPath(&quot;/demo-docs&quot;);
        }

        super.prepareTree(tree, browseMode, request);
    }
}
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;... but I&apos;m guessing you&apos;ve been stumbling across the same issue I just had: when you define a &lt;b&gt;&lt;tt&gt;tree&lt;/tt&gt;&lt;/b&gt;, the tree handler class will use the &lt;b&gt;&lt;tt&gt;name&lt;/tt&gt;&lt;/b&gt; property of this tree as the repository/workspace name if you don&apos;t add a &lt;b&gt;&lt;tt&gt;repository&lt;/tt&gt;&lt;/b&gt; property. And if like me you copied the dms tree to create your custom one and give it, say, the &quot;dms-custom&quot; name, the instanciation of the Tree fails miserably because no repository/workspace with name &quot;dms-custom&quot; exists. Add a &lt;b&gt;&lt;tt&gt;repository&lt;/tt&gt;&lt;/b&gt; property with value &lt;tt&gt;dms&lt;/tt&gt; and it&apos;ll work ! &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.magnolia-cms.com/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10021">
                    <name>duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="12853">MAGNOLIA-1538</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10010">
                    <name>relation</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="12852">MAGNOLIA-1537</issuekey>
        </issuelink>
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