Do you want to wait for ALL records are written for Cassandra and then write all successfully written records to PubSub or it should be performed "record by record"?
> On 24 Mar 2021, at 04:58, Vincent Marquez <vincent.marq...@gmail.com> wrote: > > I have a common use case where my pipeline looks like this: > CassandraIO.readAll -> Aggregate -> CassandraIO.write -> PubSubIO.write > > I do NOT want my pipeline to look like the following: > > CassandraIO.readAll -> Aggregate -> CassandraIO.write > | > -> PubsubIO.write > > Because I need to ensure that only items written to Pubsub have successfully > finished a (quorum) write. > > Since CassandraIO.write is a PTransform<A, PDone> I can't actually use it > here so I often roll my own 'writer', but maybe there is a recommended way of > doing this? > > Thanks in advance for any help. > > ~Vincent
