ADF TaskFlow Transaction Basics

Transaction is a collection of works either committed or rollback.Create a calling and called task flow to go through some of the transaction basics of task flow

Calling Task flow :

Called Task flow : 

From the behavior section of the called task flow you can see the following options

•  No Controller transaction is the default option means the called task flow does not participate any transaction management.
• Always begin New Transaction - Transaction is created when enter to the task flow and completes the task flow when exists the task flow 
• Always Use Existing transaction - Called task flow participates the existing transaction 
• User Existing transaction if possible - Participate the existing transaction if available or start a new transaction if not available 
• restore-save-option

Use restore-save-option =true if you want to discard the changes the end user makes with in a called bounded task flow when the called bounded task flow exits.This option apply only if the bounded task flow is entered by joining the existing transaction and a save point created on entry

No save point on task flow entry if selected prevent the creation of ADF model save point on task flow entry if taskflow participate in 'Always Use existing transaction ' or 'User existing transaction if Possible' . In this case overhead associated with a save point is not created for the transaction.

End the transaction from task flow return activity by selecting the End transaction property to commit or rollback.

Shared Data control behavior and transaction

Share data controls with calling task flow have the options Shared and Isolated

Transaction setting	Shared Data Control scope	Isolated Data Control scope
No controller txn	DataControlFrame shared without open txn	New DataControlFrame is created without an open transaction
Always begin new txn	Begin new if one is not open	Always begin new one
Always Use existing txn	Throws exception if txn is already open	Invalid.The checkbox cannot be deselected
Use Existing txn if possible	Begin a new txn if one is not already open	Always begin a new txn