Hi,
those methods are called when a new filter is registred into the chain.
However, the few filters implementing those methods typically check that
the added filter is not already present in the chain :
ProtocolCodecFilter, ExecutorFilter, KeepAliveFilter :
public void onPreAdd(IoFilterChain parent, String name,
NextFilter nextFilter) throws Exception {
if (parent.contains(this)) {
throw new IllegalArgumentException(
"You can't add the same filter instance more than
once. Create another instance and add it.");
but SslFilter does some intrigating things, which seems to me deserves
to be found in a init() method.
IMO, pre/post operation are just a bit too much. The way it should be
done is :
- init the filter
- add/remove a filter from the chain
and that's it.
Anyone has a better vision of what those method are good for ?
--
--
cordialement, regards,
Emmanuel Lécharny
www.iktek.com
directory.apache.org
