问题
I am using Weld implementation of CDI 1.0 and I cannot find way how to make bean lazy like in Spring (using @Lazy or lazy-init in XML). Is there a way how to tell CDI's Injector not to initialize bean on startup?
回答1:
No, this isn't possible in CDI. The closest thing you could get would be to create a new InjectionPoint (using an Extension) implementation that gives a proxy and the proxy would initialize everything on the first method invocation.
回答2:
See my answer on: http://www.adam-bien.com/roller/abien/entry/lazy_injection_with_javax_inject
Using
@Inject
Instance<MyObject> object;
the bean is initialized only when needed ... isn't that what you want?
回答3:
If the bean you're injecting is in a normal scope (@SessionScoped, @RequestScoped etc), it will be lazily instantiated. What you get in your client bean is a proxy that doesn't point to a concrete instance until the first time you invoke a method on the proxy.
As others have already pointed out, @Inject Instance<MyBean> myBeanInstance; can also be used to establish an explicit lazy instantiation.
来源：https://stackoverflow.com/questions/12630508/how-to-make-a-cdi-bean-lazily-initialized