Problem with ContinuationsManagerImpl

[Vadim Gritsenko <va...@verizon.net>]

Hi there,

I see that there is a problem with ContinuationsManagerImpl class. Also 
it may seem that this is proper Avalon component, it's not. It is used 
directly from two places:
 * WebContinuation.java
 * JSCocoon.java

And first one AFAIU is publicly accessible object. Which means that one 
can't change implementation class as one should be able to do with 
Avalon component.

ContinuationsManagerImpl is used directly because of two methods:
 * generateContinuationId(WebContinuation)
 * displayAllContinuations()

Either we have to add these two methods to the ContinuationsManager 
interface or modify implementation to remove this coupling.

I propose following changes:
 * Iterator iterateAllContinuations() instead of displayAllContinuations
 * Generate continuation ID in the manager and pass it to the 
continuation via its contructor, thus no need for public method 
generateContinuationId

Thoughts?

Vadim