[Springframework-developer] Re: Strange "double" singleton bug

[Nimish <nim...@ya...>]

> Mike,
>  
> Your approach seems to be perfectly OK. I"ve just
tried > to reproduce your issue but wasn"t
> able to: I always get a single instance, no matter
if ? > implementing ApplicationListener or
> not. Could you double-check the effect, and possibly

> send a minimal test case that
> reproduces the problem?
>
> Juergen

Hi, 

I am getting a similar problem as Mike. I am writing a
WebApp using Spring and I have a a filter which is
used to trace the requests. In the web.xml, I am
creating two instances of the filter class. However,
when I try to get a singleton bean from
XmlWebApplicationContext in the init() method of the
filter, I get a different object. 

The code that retrieves the bean in the init() method,
looks like this:

		if(context.containsBean("statusReporter")) {
  if(logger.isDebugEnabled()) logger.debug("Singleton:
" + context.isSingleton("statusReporter"));
  StatusReporter reporter =
(StatusReporter)context.getBean("statusReporter");
  logger.debug("Status reporter: " +
reporter.hashCode());
} 

The last debug statements prints a different hashcodes
for each invocation of init(). I have made sure that
the "context" object is the same in both cases. 

Any clues, mistakes, bugs that I am overlooking?

Thanks in advance,

Nimish



	
		
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