This project illustrates some setup and practices when using Spring boot and Spring Data Neo4j with a causal cluster.

This includes:

• The use of multiple URIs for initial connection on core members of the cluster
• The read only transactions that allow routing requests to replica servers
• Setup of detection of stale connections through connection testing
• Application level retry mechanisms (see comments in UserService)

More detail is available in the documentation.

There are REST 2 endpoints:

• GET /users : retrieves users using a read only transaction, hitting replica servers if they are available instead of core servers.
• POST /users : creates a user. Retry the operation if the cluster in not available. Check the notes in UserController for additional info.

To run the example :

• start a cluster (see the script start-neo-cluster.sh : it starts a cluster with docker)
• run the spring boot application as usual