Bootstrap mode not configurable

[SAJLinders]

While working on a project I came across the requirement where a connection to a MongoDB database should not be opened until we absolutely must. Looking around online as to what's available I came across the BootstrapMode enumeration. For JPA repositories this can be set in the following way:

spring.data.jpa.repositories.bootstrap-mode: lazy

As far as I can tell though, this is not available for Mongo repositories. Instead it always uses the DEFAULT bootstrapping mode. Is this intended or is there a way to change the bootstrapping mode that I just happened to have overlooked?

We are using spring-boot-starter-data-mongodb version 2.3.4.RELEASE.

[christophstrobl]

The connection is opened by the MongoClient on create and not by the repository support. Obtaining a MongoCollection from the driver does not require any server interaction.

[SAJLinders]

So the problem does not have to do with the repository initialization but rather the MongoClient initialization. Now I'm not sure if this is still the right place to look for a solution but is there a way to delay the MongoClient from making a database connection until a MongoRepository actually needs it? By default it connects eagerly on start-up

[mp911de]

If you want to delay Mongo client creation, then this is rather a topic for Spring Boot. Please file a ticket at https://github.com/spring-projects/spring-boot/issues if the issue is still relevant. As a local workaround, you could implement a MongoDatabaseFactorySupport with deferred client creation.