Hi Alex,Cassandra Triggers may help. They come with their drawbacks, but they can be an option for something like this: https://docs.datastax.com/en/cql/3.1/cql/cql_reference/trigger_r.html -Ashic.
Date: Sun, 24 Apr 2016 12:05:31 -0400 Subject: Re: Publishing from cassandra From: michael.la...@nytimes.com To: user@cassandra.apache.org You could take a look at, or follow: https://issues.apache.org/jira/browse/CASSANDRA-8844 On Sun, Apr 24, 2016 at 10:51 AM, Alexander Orr <menta...@gmail.com> wrote: Hi, I'm wondering if someone could help me, I'd like to use cassandra to store data and publish this on dowstream to another database (kdb if anyone is interested). Essentially I'd like to be able to run a function or operation on cassandra from an upstream process that would insert to table and publish the data on downstream. I can't see anything in the docs, but I'm relatively new to cassandra. Assuming there's not something simple already in place what would be the best way to impliment this kind of mechanism? I have some java that will allow me to talk to the db I want to, but I'm not sure of the best way to integrate this with cassandra. UDFs seem to have ponential, but I don't think it's possible to use external libraries/classes within UDFs. All I can think of at the minute is either having a process which controls cassandra, publishes to it and also the downstream system directly or cloning the git repo and seeing if I can hack in some extra functionality. Any suggestions welcome. Thanks Alex
