com.r3corda.node.services.network / PersistentNetworkMapService / <init>

# <init>

`PersistentNetworkMapService(services: ServiceHubInternal)`

A network map service backed by a database to survive restarts of the node hosting it.

Majority of the logic is inherited from AbstractNetworkMapService.

This class needs database transactions to be in-flight during method calls and init, otherwise it will throw exceptions.