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From Jean-Louis MONTEIRO <>
Subject Re: Putting data source into local container?
Date Mon, 20 Apr 2009 20:53:20 GMT

Thanks a lot David for this very detailed description.


David Blevins wrote:
> On Apr 20, 2009, at 12:12 PM, Jean-Louis MONTEIRO wrote:
>> Laird,
>> I found the problem (on a new project created from scratch ;-)).
>> If you duplicate the line
>>    this.context = new InitialContext(properties);
>> it will work.
>> A JIRA already exists on that point.
>> I don't know why, but sometimes the InitialContext used to bootstrap  
>> OpenEJB
>> is corrupted.
> It's basically due to this strange way that the InitialContext works.
> You can register a provider to handle lookups that start with a prefix  
> (see Context.URL_PKG_PREFIXES which is an internal flag).  When  
> someone does a "new InitialContext().lookup("java:foo")", the  
> InitialContext looks for a class called '<any-package- 
> prefix>.java.javaURLContextFactory', instantiates it and does the  
> lookup using that factory.
> But when the InitialContext is constructed with properties that  
> contain an Context.INITIAL_CONTEXT_FACTORY, it decides to go a  
> different route entirely, ignores the javaURLContextFactory  
> implementation and instead delegates the call to the Context created  
> by the InitialContextFactory.  Kind of a messy API, but that's the way  
> it is.
> To get around it I basically had to beef up the IvmContext  
> implementation to catch "java:" lookups and delegate them to our  
> "javaURLContextFactory" implementation.  This should give us a more  
> consistent view of url lookups.  In lots of situations (tomcat or  
> geronimo) the "java:" provider is already taken, so it seemed like a  
> good additional measure to add a new prefix "openejb:" that would be  
> guaranteed to work more universally.  So in 3.1.1 using  
> "openejb:Resource/TestDataSource" is definitely preferred to  
> "java:openejb/Resource/TestDataSource".
> -David

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