Comments on: Lazy bean instantiation in Spring 2.0 http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/ Exploring the Spring Framework and Application Development Thu, 28 Aug 2008 23:14:30 +0000 http://wordpress.org/?v=2.1 By: Chris http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-582 Chris Mon, 05 Jun 2006 18:41:08 +0000 http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-582 Unless I am misunderstanding your post or you are mistaken. The lazy-init attribute has been available since at least Spring 1.1... perhaps earlier. You can also specify the entire bean context file to default to laziness by setting the default-lazy-init attribute of the beans element to true. I have not poked around into the source to ensure that its working 100% correctly, but we use and have seen the lazy behavior working in our application. Maybe some bugs have been fixed or maybe it's now a little lazier? :-) Unless I am misunderstanding your post or you are mistaken. The lazy-init attribute has been available since at least Spring 1.1… perhaps earlier. You can also specify the entire bean context file to default to laziness by setting the default-lazy-init attribute of the beans element to true.

I have not poked around into the source to ensure that its working 100% correctly, but we use and have seen the lazy behavior working in our application.

Maybe some bugs have been fixed or maybe it’s now a little lazier? :-)

]]> By: Jon http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-583 Jon Mon, 05 Jun 2006 19:13:27 +0000 http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-583 Hey Chris, I just checked in the 1.2 documentation, and it is indeed there-hidden away. I didn't know about it until recently...Thanks for the heads up. Jon Hey Chris,

I just checked in the 1.2 documentation, and it is indeed there-hidden away.

I didn’t know about it until recently…Thanks for the heads up.

Jon

]]> By: Colin Sampaleanu http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-584 Colin Sampaleanu Tue, 06 Jun 2006 00:52:10 +0000 http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-584 lazy-init has actually been in there for a long, long time... The <i>default</i> behavior in Spring has always been to eagerly instantiate singletons, and lazily instantiate prototype (non-singleton) beans. However, it's been possible to turn on lazy init for singletons as well, since well before Spring 1.0, by using the lazy-init attribute. Looking back in the logs, this capability appeared on Nov. 5, 2003. Colin lazy-init has actually been in there for a long, long time…

The default behavior in Spring has always been to eagerly instantiate singletons, and lazily instantiate prototype (non-singleton) beans.

However, it’s been possible to turn on lazy init for singletons as well, since well before Spring 1.0, by using the lazy-init attribute. Looking back in the logs, this capability appeared on Nov. 5, 2003.

Colin

]]> By: Jon http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-587 Jon Tue, 06 Jun 2006 05:46:11 +0000 http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-587 Hi Colin, As noted in my earlier comment, I acknowledge this fact. I thought it was new....Still, I find it a nice little feature... Regards, Jon Hi Colin,

As noted in my earlier comment, I acknowledge this fact. I thought it was new….Still, I find it a nice little feature…

Regards, Jon

]]> By: Twice http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-595 Twice Tue, 06 Jun 2006 21:43:21 +0000 http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-595 Nevertheless it's a good pointer to those who might have missed it or couldn't identify a usecase for it. Keep up the good work. Thanks Twice. Nevertheless it’s a good pointer to those who might have missed it or couldn’t identify a usecase for it. Keep up the good work.

Thanks
Twice.

]]> By: Scott http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-1275 Scott Tue, 08 Aug 2006 15:02:32 +0000 http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-1275 One really handy use of lazy-init I've found is to specify my JNDI data source bean as lazy, so that when I'm testing things using another internal (C3P0) data source, the JNDI one is never actually instantiated, which means the app's initialization doesn't bomb out. This makes it really easy to transparently switch between configurations using only properties files. One really handy use of lazy-init I’ve found is to specify my JNDI data source bean as lazy, so that when I’m testing things using another internal (C3P0) data source, the JNDI one is never actually instantiated, which means the app’s initialization doesn’t bomb out. This makes it really easy to transparently switch between configurations using only properties files.

]]> By: Matteo http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-2613 Matteo Mon, 20 Nov 2006 17:33:45 +0000 http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-2613 Hi, how can i discover the status of a "lazy" bean? I mean, how can i know if the bean is active or not? Thanks, Matteo Hi,
how can i discover the status of a “lazy” bean?
I mean, how can i know if the bean is active or not?

Thanks,

Matteo

]]> By: Jan Hoeve http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-27736 Jan Hoeve Tue, 11 Sep 2007 18:01:17 +0000 http://www.memestorm.com/blog/lazy-bean-instantiation-in-spring-20/#comment-27736 A little bit late :) but i wrote a blog on this: http://janhoeve.blogspot.com/2007/08/speedup-development-by-making-spring.html I present a way to make all spring beans lazy at development time. This way you can speed up the code/build/deploy/test cycle. A little bit late :) but i wrote a blog on this: http://janhoeve.blogspot.com/2007/08/speedup-development-by-making-spring.html

I present a way to make all spring beans lazy at development time.
This way you can speed up the code/build/deploy/test cycle.

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