Interstage Shunsaku Data Manager Application Development Guide - Microsoft(R) Windows(R) 2000/ Microsoft(R) Windows Server(TM) 2003 - - UNIX -

5.1.2 Starting and Stopping Transactions

A transaction is started automatically by the initial data update process following establishment of a connection, or after the previous transaction has finished. Subsequent data updates do not become part of the transaction until the transaction is terminated.

Transactions are terminated by a commit or rollback operation. A commit operation enables all changes, and a rollback operation cancels all changes.

Commit and rollback operations use the following APIs. These APIs enable applications to stop transactions at any time.

Language type	API name
Java API	commit
	rollback
.NET API	Commit
	Rollback
C API	ShunCommit
	ShunRollback

Transactions will also terminate in the situations shown in the following table.

The table lists the causes of terminations and the resulting operations.

Main cause of termination	Operation
An application process terminates.	Transactions that are running when the application process terminates will be rolled back.
The conductor judges that the application process has terminated because the application server fails or a network problem occurs.(*1)
An error that does not allow the transaction to continue occurs.	The transaction will be rolled back and the rollback will be reported to the application as an API result.

*1) Refer to Recovering Shunsaku System in the Troubleshooting for more information on restoration methods.