You can use threads in Jolt to get asynchronous behavior that is analogous to the tpacall() function in Oracle Tuxedo. With this capability, you do not need an asynchronous service request function. You can get this functionality because Jolt is thread-safe. For example, the Jolt client application can start one thread that sends a request to an Oracle Tuxedo service function and then immediately start another thread that sends another request to an Oracle Tuxedo service function. So even though the Jolt tpacall() is synchronous, the application is asynchronous because the two threads are running at the same time.