Watches target mongo collection using mongo event log and executes certain handlers based on subscribed collection changes.
If the collection was renamed, dropped or recreated, the event stream produces an 'invalidate' event for which the watcher is implemented to recover automatically from.
However make sure to reapply the collMod command options to the collection (if necessary).
This package contains helper methods to do it (make sure you have the right Mongo user permissions):
collMod changeStreamPreAndPostImages
db.EnablePrePostImages(mongoInstance *mongo.Database, colName string) error
collMod recordPreImages
db.RecordPreImages(mongoInstance *mongo.Database, colName string) error
To be able to run tests in this repo you will need to have some local and remote mongo instances running on port 27017. Configure parts with TODO comments.
Courtesy of @ignasbernotas and @zolia