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Version 2 by hannes on 16. November 2006, 01:50

Jetty Continuations (suspend HTTP connections): http://docs.codehaus.org/display/JETTY/Continuations
http://docs.codehaus.org/display/JETTY/Continuations
This is not a "real" continuation as this isn't supported by Java. Instead, it relies on "that all actions taken by a filter or servlet before a call to suspend(long) are either idempotent (can be retried) or are made conditional on isPending() so they are not performed on retried requests".
http://jetty.mortbay.com/apidocs/org/mortbay/util/ajax/Continuation.html

Rhino Continuations (suspend script state):
http://wiki.apache.org/cocoon/RhinoWithContinuations
Does not reflect current implementation, but this is the best I could find.

Rhino and Jetty continuations can be used alone or in combination to create various interesting tricks:

* Send back a page and continue on the same spot the next time the client sends a request
* Keep connection open and for use by other threads of control
* Keep connection open for use by same thread of control

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