JSP application scope objects in Java library

I am working on a preexisting web application built with JSP, which uses an ext开发者_运维技巧ernal Java library. I want to make some JavaBeans that were instantiated with jsp:useBean tags available to the Java code.

What would be a good practice to do that? I suppose I can pass the objects in question to every function call that requires them, but I'd like to avoid that.

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Application scoped objects are stored as attributes of the ServletContext. If the "function call" has access to the ServletContext, then it can just grab them as follows:

Bean bean = (Bean) servletContext.getAttribute("beanname");

I of course expect that the "function" is running in the servlet context. I.e. it is (in)directly executed by a servlet the usual way.