Hi all,
In my Tomcat app I'm looking for a good (or commonly used) method for firing off an asynchronous task. For example, a
user registers for an account, and an a task to send a verification email to the user is triggered w/o delaying the
response to the user (i.e., task happens in the background).
I'm somewhat aware that JMS could be used for this and is part of most J2E environments, but I'd like to see if there's
some way to pull this off w/vanilla Tomcat.
I had a couple ideas that would probably work, but I'd like to see how others
have solved this problem.
One idea would be to insert a record into a database table that signifies an email should be sent to the user. This
table could be regularly checked by a scheduled job (e.g., a TimerTask) that runs every minute in the background.
Another (maybe not so good) idea would be to leverage perhaps a session or request attribute listener that would check
for a certain attribute being added to a session or requests. Then if a 'send email' attribute comes through, the
listener could process an email. This seems like a bad idea though as I believe the listener event class would be
triggered incessantly any time attributes are added/removed when in fact I'm only actually interested in the 'send
email' attribute.
Anyway, I'm open to all ideas and appreciate you indulging me this far.
Eric P.
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