Get notification for changed documents in mongodb
configuration, mongodb, networking
Solution
MongoDB doesn’t yet have triggers, but you can hook your application to tail off the oplog collection and do something every time a document is deleted (or updated, or inserted, etc.)
The 3 part blog post here might be helpful on how to do this : http://www.kchodorow.com/blog/2010/10/12/replication-internals/
Problem
i'm trying to use mongodb as a network wide configuration storage. This the same app runs on multiple machines on the network, each pulls its configuration from its local mongodb. The mongodbs are synced. What i would like is to get a callback/notification in all n-1 apps if one application changes any of the config values. Is this kind of setup possible ? (It would save me from doing the network transfer/syncronisation etc. myself.)