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From Trustin Lee <>
Subject Re: [mina] Filter management (was Spring Integration)
Date Sat, 12 Nov 2005 06:07:48 GMT
Hi Jose,

2005/11/11, Jose Alberto Fernandez <>:
> Niklas provided a preconstructed IoFilterChain, I am passing the code to
> construct the IoFilterChain. That is the only difference. Should the person
> doing the binding know which filters are needed for a protocol provided in
> some other package? Or should that be expressed as part of the code in the
> package providing the protocol implementation?
Now I see the main difference between the two approaches. Let's reanalyze
the two:

* Jose's approach

The problem here is that IoFilterChain contains some transport-type-specific
code so we cannot simply create and construct it. So a new interface
'IoFilterChainBuilder' (I think 'builder' is better than manager here) is

* Niklas's approach

His approach has advantage over Jose's one because it doesn't introduce any
new interface that a user has to learn. But IoFilterChain contains some
transport-type-specific code as I mentioned above. We'll have to create an
implementation of IoFilterChain which is independent from any
transport-type. It should be easy and will be reusable because this chain
will be copied into the internal filter chain implementation.

I think Niklas's approach is better because it doesn't introduce a new
interface and Jose's approach can be implemented as a simple factory. WDYT?

what we call human nature is actually human habit

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