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From "David Jencks (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DIRSERVER-760) reading .schema files at server start-up
Date Fri, 23 Mar 2007 13:23:32 GMT

    [ https://issues.apache.org/jira/browse/DIRSERVER-760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12483592
] 

David Jencks commented on DIRSERVER-760:
----------------------------------------

I don't really understand what this issue is about, but it looks to me as if both this one
and 834 are about having the set of schemas you want present after the server starts, rather
than the set of schemas present in the default server installation.  I'm hoping someone can
explain when you would use this system and when you'd use the 834 solution.  I think that
834 asks you to preprocess your schemas into a apacheds friendly jar format which then gets
installed as the schemas on the first startup, whereas this is more dynamic, but I'd like
someone who understands this better to confirm or deny this.

> reading .schema files at server start-up
> ----------------------------------------
>
>                 Key: DIRSERVER-760
>                 URL: https://issues.apache.org/jira/browse/DIRSERVER-760
>             Project: Directory ApacheDS
>          Issue Type: New Feature
>          Components: core
>    Affects Versions: 1.5.1
>         Environment: N/A
>            Reporter: Norval Hope
>         Attachments: schema_branch.patch, schema_branch.patch, schema_loader.patch
>
>
> I am submitting a patch for a feature I required, and which I've seen a number of queries
about on the DEV list. Currently the only way to get new .schema information into ApacheDS
is to use the Maven2 plugin, requiring a rebuild of the server (not to mention working around
problems like methods being generated which are too long for Java to handle).
> Instead this patch adds support for reading of  specified .schema files from server.xml
at server startup, via a new interface SchemaLoader and a default implementation FileSystemSchemaLoader.
The latter supports reading all files matching a specified regex in a specified directory
(in which case users must be careful to ensure that files appear lexicographically before
their dependant files, ala init.rc in Linux) or reading an ordered list of file names under
a specified directory. An example server.xml snippet is as follows:
>     <property name="bootstrapSchemas">
>       <set>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.AutofsSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.CorbaSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.CoreSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.CosineSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.ApacheSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.CollectiveSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.InetorgpersonSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.JavaSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.Krb5kdcSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.NisSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.SystemSchema"/>
>         <bean class="org.apache.directory.server.core.schema.bootstrap.ApachednsSchema"/>
>       </set>
>     </property>
>     <property name="schemaLoaders">
>         <list>
>             <bean class="org.apache.directory.server.core.schema.FileSystemSchemaLoader">
>                 <constructor-arg><value>./</value></constructor-arg>
>                 <!--<constructor-arg><value>.*_openldap.schema</value></constructor-arg>-->
>                 <constructor-arg>
>                     <list>
>                         <value>my1_openldap.schema</value>
>                         <value>my2_openldap.schema</value>
>                     </list>
>                 </constructor-arg>
>             </bean>
>         </list>
>     </property>
> noting that the Maven2 style approach is of course still supported where desired. A list
is used so that multiple SchemaLoader implementations can be appended if required (which I
do). 
> I have also included SchemaFromSearchConverter which can read a schema from another directory
via conventional query, which may come in useful for people using ApacheDS as a virtual directory
container of sorts. It is not required by the core patch and can be excluded if no generic
use is seen for it.
> A few issues are still outstanding:
>    1. Is the patch seen as worthwhile by the DEV list and/or are there any issues with
my implementation of it?
>    2. At it's core the patch uses the OpenLdapSchemaParser to read the .schema files,
which is currently only available in the Maven2 plugin artifact     
> <groupId>org.apache.directory.server</groupId>
> <artifactId>apacheds-core-plugin</artifactId>
>    
>     which is a bit clunky as it means people need to include this jar in their classpath
(or in the UberJar). Perhaps this parsing component should be separated from the rest of the
maven plugin to tidy this up (I don't know maven well enough to do this myself).
>    
>    3. If the feature and implementation are ok, what further steps should I take re preparing
the patch for inclusion?
> Thanks (by the way I was previously known as Norbert Reilly)

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