callback on insert or update

(3 posts) (2 voices)

• Started 4 months ago by tbee
• Latest reply from tbee
• This topic is not a support question

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• callback listener

1. 

   tbee
   Member

   I'm considering storing an abstract of the data in Cassandra in a regular RDBMS so reporting tools can use them. Cassandra will contain the core data, while a regular RDBMS may add more contextual data that does not need to clutter up the network connections because it is being replicated.

   In order to implement this in a good and stable style, I would like to have some kind of notification system whenever a Cassandra nodes updates a CF. Maybe a callback or listener similar to IEndPointStateChangeSubscriber, but then on CF.

   Is this possible?

   Posted 4 months ago #
2. 

   ruchitshah
   Member

   I think not out of the box but you need to implement in your application logic. Meaning if success is return back from cassandra then you can trigger JMS message to RDBMS. Alternatively, you can write only changed rowkeys into another CF and periodically transfers the data from cassandra to RDBMS.

   Posted 3 months ago #
3. 

   tbee
   Member

   Thanks for the feedback. I'm going to attempt to have to duplicate data by using CQL and the JDBC driver.

   Posted 3 months ago #

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