Guice assisted injection deeper down the dependency hierarchy

Question

I want to conduct a chain of processing elements and wire them together via Guice. Let\'s assume the following path:

• interface A implemented by

Answer 1

I see three options. They depend on how often you change the input for A .

1) Bind input as a constant in your module. This works only, if you know that value before you create the Injector and never want to change the value. See bindConstant

2) Use a private submodule which binds either A or the value for input inside that module. Basically you can have two or three instance graphs with different value. See newPrivateBinder.

3) Use a Scope ala RequestScope, SessionScope, ... This way you can change the input often but you must enter/leave the scope at some point to be defined. See Custom Scopes for an example.