This article at devWorks may be of interest. It brings up more
questions than answers, but at least explains some issues. They do seem to
take, IMO, the wrong side on polling vs. callbacks.

These kinds of issues have a lot to do with scalability, which almost
always raises its head at some point. One of my clients (who ignored my
advice) is currently finding that out the hard, expensive way. Regarding
some recent posts about Glassfish, notice that it already uses NIO. I'm not
familiar with Tomcat's Comet support. See:

Joe Sam

Joe Sam Shirah -
conceptGO - Consulting/Development/Outsourcing
Java Filter Forum:
Just the JDBC FAQs:
Going International?
Que Java400?

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