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Modeshape also has some tightly-integrated asynchronous operation machinery called Sequencers.
ModeShape sequencers can automatically unlock the structured information buried within all of those files, and this useful content derived from your files is then stored back in the repository
Webhooks
Fedora 4 provides fcrepo-webhooks as an optional module. Webhooks allows you to register a callback url as a lightweight means of acting on repository events.
fcrepo-irc provides a proof-of-concept application that uses Fedora's webhooks to post messages to an IRC channel when a repository event occurs.