I would like to be able to have objects register
themselves as a listener to an EJB. Listeners are then
notified of events on the EJB (e.g. the status
attribute has been changed). This is a straight
forward pattern in normal programming (J2 uses it for
mouse events etc.), but in a J2EE environment this
gets more tricky.
The overhead of 'polling' and EJB every n seconds and
then programatically searching for changes, is far
greater than simply having the EJB tell an object that
needs to know that something has changed.
Has any one achieved this? Is there an 'extended'
pattern for EJB?
The clients/listeners will reside on different
machines, so I assume RMI will come into play
somewhere.
Thanks in advance.
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