In the example "hibernate-orm / documentation / src / main / docbook / devguide / en-US / chapters / events / extras / AuditInterceptor.java"

Due to unavailability of Transaction Id in Onsave methods , afterTransactionComplete may give falls information.
Let me take a example:

Tx_A create entity EA1, EA2.
Tx_B creates entity EB1, EB2.

Now let say execution flow happens this way:
[1] onSave for EA1, i add EA1 id to flushList
[2] onSave for EB1, i add EB1 id to flushList
[3] afterTransactionComplete(tx) for Tx_A

Now at this point i will print 2 created, but actually not as EB1's transaction may rollback.
may be OnSave(..) parameter should pass transaction object also.

Link to file:https://github.com/hibernate/hibernate-orm/blob/a2287b6c6d43b44f656632503401b7968c42bd86/documentation/src/main/docbook/devguide/en-US/chapters/events/extras/AuditInterceptor.java