Re: [Springframework-developer] Using Spring as a Singleton Factory?

[Robert W. <rw...@gm...>]

Thank you for your quick response. I am attempting to easily get instances
out of the "current" ApplicationContext as a factory rather than using IoC.
A few outlines are given below.

1) Here is an example of what I am trying to avoid. I will comment on an
example below (perhaps I am doing this wrong and someone help with that).

// I do not want them to have to know the resources to pass in. This assumes
it is locatorContext.xml, but that can change.
// This flexibility is externalized for a web application using the
contextConfigLocation parameter
BeanFactoryLocator locator =
ContextSingletonBeanFactoryLocator.getInstance("locatorContext.xml");

// Here I need to get a bean factory too? Why is it not just an
ApplicationContext that is returned? Are there benefits to this?
// If there are, I do not like that the user must know the id of the factory
and have that in the code (similar to the resource location, it isn't
externalized)
BeanFactoryReference factoryRef = locator.useBeanFactory("springFactory");

// Get an instance of the object. Here I am not concerned with the user
knowing the id of the bean.
Service service = (Service)factoryRef.getFactory().getBean("service");

Another thing I do not like is that there are so many steps involved in
getting the bean out of the applicationcontext. I just want to get an
instance.

2) One approach I have seen that is similar to what I want is outlined
below:

// get the applicationcontext (but i do not want it to depend on j2ee.
// For example ContextLoader contains a compile time dependency on
ServletContext.
ApplicationContext context =
ContextLoader.getCurrentWebApplicationContext();

// get a bean from the applicationcontext
// once again, knowing the id of the bean is acceptable (and expected)
Service s = (Service) context.getBean("service");

// use the bean

Is there any approach similar to #2 that works without a dependency on j2ee?
I am certain I could write some code to do this, but I would like to do this
with code that exists and in the cleanest way possible. Feedback on even
doing this is appreciated too. I would like to know that part of the
requirement is to use Spring as a Factory (Unfortunately, IoC is not
permissible for this use case).

Thanks!

On Tue, Jun 10, 2008 at 2:03 PM, Chris Beams <chr...@sp...>
wrote:

> Hi Robert,
>
> Please provide a bit more context about what you're trying to achieve
> (a simple code example would suffice).
>
> - Chris
>
> --
>
> Chris Beams
> Senior Consultant, SpringSource
> http://www.springsource.com
>
>
> On Jun 10, 2008, at 3:00 PM, Robert Winch wrote:
>
> > I am looking for a method to easily access the current
> > ApplicationContext that is not bound to j2ee. The closest thing I
> > have found is
> org.springframework.web.context.ContextLoader.getCurrentWebApplicationContext
> > (), but this class has dependencies on j2ee. Is there a recommended
> > way of obtaining the current ApplicationContext for applications
> > that may exist outside the web?
> >
> > Thanks in advance!
> > Rob
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