purpose of execution filters

[Sandro Pedrazzini]

Hi,

I am using Mina (1.6) for a use case similar to the  
HttpProtocolHandler example delivered with the release.
There the I/O logic needs to be executed in a separate "worker" thread  
(You *MUST* execute stream I/O logic in a separate thread).

I tried to avoid this specifying a thread pool as execution filter in  
the filter chain,

        DefaultIoFilterChainBuilder filterChainBuilder =  
_acceptor.getDefaultConfig().getFilterChain();
        filterChainBuilder.addLast("threadPool", new  
ExecutorFilter(Executors.newCachedThreadPool()));

but this does not seem to have the same purpose.
The worker are used to be able to begin reading the input stream  
(wrapper) on the server, while the client is still writing to the  
buffer. Did I understand right?
Can the workers in HttpProtocolHandler be avoided at all?

Thanks and best regards
sandro