@groovy.transform.CompileStatic
class GormSharedSessionMongoTransactionManager
extends DatastoreTransactionManager

A org.springframework.transaction.PlatformTransactionManager that drives a single GORM MongoDB transaction and additionally exposes its ClientSession to Spring Data MongoDB, so that GORM operations and MongoTemplate/repository operations executed within one @Transactional method participate in the same MongoDB transaction.

It extends DatastoreTransactionManager — inheriting GORM's begin/commit/rollback, session binding and flushing — and, once GORM has started its ClientSession, binds a Spring Data MongoResourceHolder referencing that same session, keyed by the MongoDatabaseFactory. Spring Data's MongoTemplate discovers that holder via the thread-bound resources and runs inside the session, so a single commit (or abort) — driven by GORM — applies to both stacks atomically.

This requires GORM server-side transactions to be enabled (grails.mongodb.transactional = true); without an active ClientSession there is nothing to share and Spring Data operations run outside of a transaction as before.

Propagation: like GORM's DatastoreTransactionManager, this manager supports a single flat transaction (PROPAGATION_REQUIRED); Spring-native suspension propagations such as REQUIRES_NEW and NESTED are not supported and behave as REQUIRED (they join the surrounding transaction rather than suspending it).

Since:

8.0