Java pattern for nested callbacks?

Question

I\'m looking for a Java pattern for making a nested sequence of non-blocking method calls. In my case, some client code needs to asynchronously invoke a service to perform s

Answer 1

I am not sure if I get you question correctly. If you want to invoke a service and on its completion result need to be passed to other object which can continue processing using result. You can look at using Composite and Observer to achive this.