On Fri, 7 Sep 2001 03:22, Leo Sutic wrote:
> All,
>
> I am trying to use the excalibur.naming package, but I am having severe
> problems with the in-memory naming system.
>
> DefaultConfiguration config = new DefaultConfiguration("roles", "");
> DefaultConfiguration timeComponent = new DefaultConfiguration("role",
> "roles");
> timeComponent.addAttribute("role", Time.ROLE);
> timeComponent.addAttribute("class", TimeComponent.class.getName());
> config.addChild(timeComponent);
>
> Hashtable environment = new Hashtable();
> environment.put(Context.INITIAL_CONTEXT_FACTORY,
> MemoryInitialContextFactory.class.getName());
>
> Context initialContext = new InitialContext(environment);
> Context ctx = initialContext.createSubcontext("org");
> ctx = ctx.createSubcontext("apache");
> ctx = ctx.createSubcontext("cocoon");
> ctx = ctx.createSubcontext("samples");
> ctx = ctx.createSubcontext("parentcm");
> ctx.rebind("ParentCMConfiguration", config);
>
> initialContext = new InitialContext(environment);
>
> initialContext.lookup("org/apache/cocoon/samples/parentcm/ParentCMConfigura
>t ion");
>
> The last line results in a name not bound exception: org.
>
> I looked at the code, and the statement new InitialContext(environment)
> really does create two different namespaces. The contexts obtained via the
> MemoryInitialContextFactory are thus not persistent - they are more like a
> hierarchical HashMap.
yep ;)
> So, how does one use this package?
exactly like a hierarchial HashMap if you use MemoryContext ;) RMIContext
allows remote contexts however that requires sophisticated mechanisms to get
references to each object which you probably don't want to do.
> I need to store one object from one
> class and pick it up in another, without passing the InitialContext across.
In that case it is probably best to create a customized version of
MemoryInitialContextFactory that stores it in a static (or inheritable
thread-local) variable.
--
Cheers,
Pete
-------------------------------------------------------
To fight and conquer in all your battles is not supreme
excellence; supreme excellence consists in breaking the
enemy's resistance without fighting. - Sun Tzu, 300 B.C.
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