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The following page has been changed by KevinWilliams: http://wiki.apache.org/ws/WorkingWithTransactions ------------------------------------------------------------------------------ The second API used by clients is the DAS applyChanges() method (see ChangeSummaryProcessing). Again, the boundaries of the transaction match the boundaries fo the call to the method. The DAS will create a set of INSERT/UPDATE and DELETE statments to flush the graph changes to the database and all of these statements will be executed as part of a single transaction. If the method returns without exception then the application can assume that all changes were successfully committed to the database. If an exception is returned then the changes will have all been rolled back. == External Transactions == - To be continued... + The RDB DAS provides a straightforward mechanism for working with external transactions. As mentioned above, the DAS, by default, acts as the transaction manager and commits and rolls back transactions accordingly. However, that DAS can also be configured to not issue commit/rollback and this is the behavior needed to have the DAS participate in a larger transaction since some external party is responsible for these actions. The following pseudo-code illustrates this: + {{{ + tx.begin(); + try { + doSomeJMSStuff(); + doSomeDASStuff(); + tx.commit(); + } catch (AnyException ex) { + tx.rollback(); + } + }}} + --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
