Description
Allows a component to find out whether it is running on a transaction server.
Applies to
TransactionServer objects
Syntax
transactionserver.Which ( )
Return value
Integer.
Returns 0 if the object is not running on a transaction server, 1 if it is running on EAServer (obsolete), or 2 if it is running on COM+.
Usage
The Which function allows a custom class user object to perform different processing depending on its runtime context.
Examples
The code in the following example checks to see whether the runtime context is a transaction server. If it is, it uses transaction semantics that are appropriate for a transaction server; otherwise, it uses COMMIT and ROLLBACK to communicate directly with the database:
// Instance variables:
// DataStore ids_datastore
// TransactionServer ts
Integer li_rc
long ll_rv
li_rc = this.GetContextService("TransactionServer", &
ts)
IF li_rc <> 1 THEN
// handle the error
END IF
...
...
ll_rv = ids_datastore.Update()
IF ts.Which() > 0 THEN
IF ll_rv = 1 THEN
ts.EnableCommit()
ELSE
ts.DisableCommit()
END IF
ELSE
IF ll_rv = 1 THEN
COMMIT USING SQLCA;
ELSE
ROLLBACK USING SQLCA;
END IF
END IFSee also
