We are using Janus 0.5.2 with Cassandra and Elastic-search. 

Currently for adding or updating a node we are using gremlin queries in java.  

We have a use case where we need to update multiple-nodes for a given metadata. We want to make sure updates to multiple nodes are transactional and when updates are happening, no other thread should update them.

Through gremlin queries do we have option to: 

 - achieve transaction updates.

 - locking/unlocking of nodes for updates?

Appreciate your thoughts/inputs.

Thanks,

Anjani