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https://issues.apache.org/jira/browse/DIRSERVER-1154?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Karasulu reassigned DIRSERVER-1154:
----------------------------------------
Assignee: Alex Karasulu
> Declaration and instantiation of refService in ServerLdapContext limits
> extensibility
> -------------------------------------------------------------------------------------
>
> Key: DIRSERVER-1154
> URL: https://issues.apache.org/jira/browse/DIRSERVER-1154
> Project: Directory ApacheDS
> Issue Type: Bug
> Components: core
> Affects Versions: 1.5.4
> Reporter: Icky Dude
> Assignee: Alex Karasulu
> Fix For: 1.5.4
>
>
> I ran into a problem that I think needs some simple design work or a simple
> fix. For my project is is not necessary to handle referrals, so I decided to
> simply eliminate the ReferralIntercepter from my InterceptorChain. As soon
> as I did this, myDirectoryService started crapping on a NullPointerException
> buried in the bowels of the DefaultSearchHandler (something I definitely
> don't want to mess with for my project).
> 1) At DefaultSearchHandler.java:357 of there is an instantiation of a new
> SearchResponseIterator.
> 2) The constructor for SearchResponseIterator calls
> ServerLdapContex.isReferral() at SearchResponseItereator:117
> 3) ServerLdapContext.isReferral() results in a NPE at
> ServerLdapContext.java:264 unless your DirectoryService's InterceptorChain
> includes a ReferralInterceptor. Take a look at the constructor and you'll
> see why:
> public ServerLdapContext( DirectoryService service, Hashtable<String, Object>
> env ) throws NamingException
> {
> super( service, env );
> refService = ( ( ReferralInterceptor ) service.getInterceptorChain().get(
> ReferralInterceptor.class.getName() ) );
> }
> Is there any chance that we can simply Check refService for null before it's
> used ServerLdapContext.isReferral(). If it's refService==null, return false?
> There's also similar a similar problem in PartitionNexusProxy.java:891 and
> 901. Here the code checks the chain for null, and returns, but it doesn't
> check the for null before invoking the interceptor method.
> Here's the patch:
> $ svn diff ServerLdapContext.java
> Index: ServerLdapContext.java
> ===================================================================
> --- ServerLdapContext.java (revision 638966)
> +++ ServerLdapContext.java (working copy)
> @@ -261,7 +261,11 @@
> */
> public boolean isReferral( String name ) throws NamingException
> {
> - return refService.isReferral( name );
> + if( refService == null )
> + {
> + return false;
> + }
> + return refService.isReferral( name );
> }
>
> /**
> @@ -272,7 +276,11 @@
> */
> public boolean isReferral( LdapDN name ) throws NamingException
> {
> - return refService.isReferral( name );
> + if( refService == null )
> + {
> + return false;
> + }
> + return refService.isReferral( name );
> $ svn diff PartitionNexusProxy.java
> Index: PartitionNexusProxy.java
> ===================================================================
> --- PartitionNexusProxy.java (revision 638966)
> +++ PartitionNexusProxy.java (working copy)
> @@ -889,6 +889,10 @@
> {
> InterceptorChain chain = service.getInterceptorChain();
> EventInterceptor interceptor = ( EventInterceptor ) chain.get(
> EventInterceptor.class.getName() );
> + if( interceptor == null )
> + {
> + return;
> + }
> interceptor.addNamingListener( ctx, name, filter, searchControls,
> namingListener );
> }
>
> @@ -901,6 +905,10 @@
> return;
> }
> EventInterceptor interceptor = ( EventInterceptor ) chain.get(
> EventInterceptor.class.getName() );
> + if( interceptor == null )
> + {
> + return;
> + }
> interceptor.removeNamingListener( ctx, namingListener );
> }
> }
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