Question

I have a ServiceA which has a dependency on ServiceB. The serviceB comes from a spring bean file with lazy-init=true i.e, I only want serviceB to be initialised when and if I ask for that bean.

However I do use ServiceA throughout my application and when we do a setter based injection ServiceB gets initialised.

I want ServiceA to not initialise ServiceB until any method in ServiceA is called that needs ServiceB. One way of doing this was using the Aspects but I was looking at the simplest possible solution for this particularly in the Spring XML file for serviceB or some annotation in serviceB or any proxy flag.

Answer 1

I think LazyInitTargetSource does what you need.

Useful when a proxy reference is needed on initialization but the actual target object should not be initialized until first use. When the target bean is defined in an ApplicationContext (or a BeanFactory that is eagerly pre-instantiating singleton beans) it must be marked as “lazy-init” too, else it will be instantiated by said ApplicationContext (or BeanFactory) on startup.