It is possible to share a MongoCollection from multiple threads?
I’m initializing the MongoDatabase and MongoCollection in a @PostConstruct (I’m using Quarkus), so it is stored in an @ApplicationScoped bean and possibly shared by multiple threads.
The documentation says that the MongoCollection is immutable, but it is not clear whether also the other fields/classes it uses internally are thread-safe.
Yes, you can share them. As the documentation for the Immutable annotation states:
Immutable objects are inherently thread-safe; they may be passed between threads or published without synchronization.
Unlike ``MongoClient instances,MongoCollectionandMongoDatabase` instances are lightweight, so while they can be freely shared, it’s cheap to create new ones as needed.
Regards,
Jeff
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