Closing connection to datasource at Engine stop

tmugandani

I have a connection to an external datasource which I access through a Java class. I want to close the connection only once when the Axon Ivy engine is stopped. Should I implement the interface IServerListener for this? If yes which method is best serverStopped() or serverStopping()?

Reguël Wermelinger

There are interfaces to contribute to the Engine lifecycle, but it's not recommended to do it, since you'd have to develop a special 'dropin' extension plugin. Means a different development approach: P2-OSGi Plugin and the need to deploy/distribute it with your Engine as File (not accessible via Engine-Cockpit). So generally making the maintenance more complex and prone to errors.

I'd go for a solution that can naturally live within your IvyProject. With a ProgramStart we can setup a Hook that will be started/stopped automatically per PMV. See the msgraph-teams prototype for reference, it requires:

A Bean that implements start/stop and disables polling: https://github.com/axonivy-market/msgraph-connector/blob/v10.0.7/msgraph-teams-notification/src/msgraph/teams/notification/TeamNotificationStart.java
A dummy Process that exists just to enable the bean: https://github.com/axonivy-market/msgraph-connector/blob/v10.0.7/msgraph-teams-notification/processes/installer/TeamsNotificationHook.p.json#L15

tmugandani

Thanks a lot.