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https://issues.apache.org/jira/browse/DIRSERVER-760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12483504
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Emmanuel Lecharny commented on DIRSERVER-760:
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ok, let's keep this issue open.
I think that with the new schema system, you will be able to register new
schema on the fly, but this has to be tested (not 100% sure). The main problem
is that removing an element from an existing schema may lead in considerable
impact on the data : if you remove, say, and ObjectClass XXX, you will need to
check *all* entries and remove all of them which contains this ObjectClass.
Our intention was to use LdapStudio to offer such a tool, so that you can
anticipate the impact of such modifications. However, if yoiu have millions of
entries into the server, this kind of operation will be very costly.
In your case, you have to know that now, the schema is just considered as
standard Ldap entries, so you can edit it with any ldapBrowser, assuming you
know its structure (not really well documented atm :)
> 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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