3.2.7.5 Begin Phase Zero

The Begin Phase Zero event MUST be signaled with the following arguments:

• A transaction object

If the Begin Phase Zero event is signaled, the Core Transaction Manager Facet MUST perform the following actions:

• Set the transaction state to Phase Zero (section 3.2.1.3.3).

• Move each Enlistment object in the Next Phase Zero Wave Enlistment list of the transaction to the Phase Zero Enlistment list of the transaction.

• Set the Phase Zero Registered flag of the transaction object to FALSE.

• If the Phase Zero Enlistment list of the transaction is not empty:

  • For each Enlistment object in the Phase Zero Enlistment list of the transaction:

    • Signal the Begin Phase Zero event (see sections 3.6.7.4 and 3.7.7.3) on the Enlistment object's transaction manager facet with the Enlistment object.

• Otherwise:

  • Set the transaction state to Phase Zero Complete (section 3.2.1.3.4).

  • Signal the Phase Zero Complete event (see sections 3.4.7.14 and 3.8.7.6) on the superior enlistment's transaction manager facet of the transaction with the following arguments:

    • The Superior Enlistment object of the transaction

    • The success outcome