Hibernate high lewel save flow

java.jpa.entitymanager.merge

org.springframework.transaction.interceptor.TransactionAspectSupport#invokeWithinTransaction
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org.springframework.data.jpa.repository.support.SimpleJpaRepository#save(S)
 org.hibernate.ejb.AbstractEntityManagerImpl#merge
 org.hibernate.impl.SessionImpl#merge(java.lang.String, java.lang.Object)
 org.hibernate.impl.SessionImpl#fireMerge(org.hibernate.event.MergeEvent) 
  * loop through MergeEventListener's 
 org.hibernate.event.def.DefaultMergeEventListener#onMerge(org.hibernate.event.MergeEvent)
 org.hibernate.event.def.DefaultMergeEventListener#onMerge(org.hibernate.event.MergeEvent, java.util.Map) 
  * decide entity state
   * detached:
    org.hibernate.event.def.DefaultMergeEventListener#entityIsDetached - if detached state
     * get id from saved entity
     * get copy from Session (or db)
     * cascadeOnMerge
     * copy properties from entity to copy
      org.hibernate.event.def.DefaultMergeEventListener#copyValues(org.hibernate.persister.entity.EntityPersister, java.lang.Object, java.lang.Object, org.hibernate.engine.SessionImplementor, java.util.Map) 
       * copy values from entity to copy by org.hibernate.type.TypeHelper#replace
     * return copy as result
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org.springframework.transaction.interceptor.TransactionAspectSupport#commitTransactionAfterReturning
org.springframework.transaction.support.AbstractPlatformTransactionManager#processCommit
org.springframework.orm.jpa.JpaTransactionManager#doCommit
org.hibernate.ejb.TransactionImpl#commit
org.hibernate.transaction.JDBCTransaction#commit
org.hibernate.impl.SessionImpl#managedFlush
org.hibernate.impl.SessionImpl#flush
 * iterate through FlushEventListener's
  org.hibernate.event.def.DefaultFlushEventListener#onFlush
  org.hibernate.event.def.AbstractFlushingEventListener#flushEverythingToExecutions
  org.hibernate.event.def.AbstractFlushingEventListener#flushEntities
  org.hibernate.event.def.DefaultFlushEntityEventListener#onFlushEntity
   org.hibernate.event.def.DefaultFlushEntityEventListener#isUpdateNecessary(org.hibernate.event.FlushEntityEvent, boolean)
    org.hibernate.event.def.DefaultFlushEntityEventListener#dirtyCheck
    org.hibernate.persister.entity.AbstractEntityPersister#findDirty
   org.hibernate.event.def.DefaultFlushEntityEventListener#scheduleUpdate
    session.getActionQueue().addAction(new EntityUpdateAction...)
  org.hibernate.event.def.AbstractFlushingEventListener#performExecutions
   org.hibernate.engine.ActionQueue#executeActions() - executes all actions IN ORDER
       		executeActions( insertions );
       		executeActions( updates );
       		   preListeners[i].onPreUpdate(preEvent)
       		   org.hibernate.persister.entity.AbstractEntityPersister#update(java.io.Serializable, java.lang.Object[], int[], boolean, java.lang.Object[], java.lang.Object, java.lang.Object, java.lang.Object, org.hibernate.engine.SessionImplementor)
       		     check if entityMetamodel.isDynamicUpdate() to create dynamic query
       		     else get stored SQL from org.hibernate.persister.entity.AbstractEntityPersister#getSQLUpdateStrings
       		        org.hibernate.persister.entity.AbstractEntityPersister#updateOrInsert
       		          session.getBatcher().prepareCallableStatement( sql )
       		          session.getBatcher().addToBatch( expectation )
       		    postListeners[i].onPostUpdate(postEvent)
       		    org.hibernate.jdbc.AbstractBatcher#executeBatch <---- actual DB update
       		     
       		executeActions( collectionRemovals );
       		executeActions( collectionUpdates );
       		executeActions( collectionCreations );
       		executeActions( deletions );
org.hibernate.transaction.JDBCTransaction#commitAndResetAutoCommit
  org.apache.commons.dbcp.DelegatingConnection#commit ...
  org.hibernate.transaction.JDBCTransaction#toggleAutoCommit
... afterCommit actions